Vol.47 No.4

Volume 47, Issue 4, April 2018

  1. 393 – 395

    Effects of Surface Fluorination on the Dispersion Stability and the Electrical Conductivity of SnO2 Particles Using Fluorine Gas

    , , and

    We studied the effects of surface fluorination on the dispersion stability and the electrical conductivity of SnO2 particles using F2 gas. The fluorine contents (x) in SnO2−xFx depended on the reaction temperature and pressures. The surface fluorination of SnO2 particles with F2 gas makes to enhance the dispersion stability and electrical conductivity.

  1. 396 – 399

    Global Reaction Route Mapping for Surface Adsorbed Molecules: A Case Study for H2O on Cu(111) Surface

    , , , , and

    Global reaction route mapping on the potential energy surface of H2O adsorbed on Cu(111) surface was performed by the artificial force induced reaction method. The resulting reaction path network was systematically analyzed by a kinetic method called rate constant matrix contraction.

  1. 400 – 403

    Diruthenium Complexes with a 1,8-Naphthyridine-based Bis(silyl) Supporting Ligand: Synthesis and Structures of Complexes Containing RuII2(μ-H)2 and RuI2 Cores

    , , and

    We developed a novel 1,8-naphthyridine-based chelate ligand t-BuNBSi that contains two silyl coordinating moieties at the 2,7-positions. Reaction of a ligand precursor t-BuNBSi(H)2 (1) with Ru3(CO)12 gave diruthenium(II,II) complex 2 with a zigzag Si–Ru–Ru–Si arrangement. Photoirradiation to 2 caused dehydrogenation and CO coordination to afford diruthenium(I,I) complex 3 with a linear Si–Ru–Ru–Si linkage involving a very long Ru–Ru bond.

  1. 404 – 407

    Complexation of Anion-responsive π-Electronic System with Alkyl-substituted Azobenzene Carboxylate Providing Ion-pairing Assemblies

    , , , , and

    A negatively charged π-electronic system was prepared by the complexation of a dipyrrolyldiketone BF2 complex as an anion receptor with a trialkyl-substituted azobenzene carboxylate. The bulk-state properties and photo-responsive behaviors of the azobenzene carboxylate in the ion-pairing form were controlled by complexation with the receptor molecule. The formation of receptor–carboxylate complexes was found to modulate the sizes, shapes, and electronic states of the anionic π-electronic systems, exhibiting the potential to form a variety of ion-pairing assemblies.

  1. 408 – 410

    High-pressure Synthesis of an Anion-filled Skutterudite Compound I0.9Ir4Sb12

    An iodine-filled iridium skutterudite compound I0.9Ir4Sb12 with a lattice constant of 9.3153(6) Å was obtained by high-pressure and high-temperature reactions at 13 GPa and 850 °C from iodine excess starting mixtures. This compound contains anions in the skutterudite cages, although normal skutterudite compounds usually contain cations in the cages. Band structure calculations indicate that the compound is a metal with a conduction band highly contributed by iodine 5p orbitals.

  1. 411 – 413

    Solid-state NMR Study of Excess Imidazole in a Proton-conducting Poly(vinylphosphonic acid)-Imidazole Composite

    , , , , and

    In this study, we investigated the structure and mobility of excess imidazole (Im) in a proton-conducting poly(vinylphosphonic acid)(PVPA)-Im composite material (PVPA/xIm (x ≥ 2), where x is the molar ratio of Im to the repeating polymer unit). The excess Im formed aggregates in PVPA/xIm that melted at ~60 °C. The mobility of Im in the aggregates and after they melted was investigated using solid-state 1H and 13C NMR. The contribution of Im to the proton conduction of the material was discussed.

  1. 414 – 416

    Superhydrophobic Melamine-formaldehyde Foam Prepared by In-situ Coprecipitation

    , , , , , , and

    In this work, a kind of multi-functional MF foam with superhydrophobic, oleophylic and magnetic properties was fabricated via an in-situ coprecipitation. Firstly, the MF foam was immersed in the solution containing FeCl2·4H2O and FeCl3·6H2O. Then, SA@Fe3O4 micro-nanoparticles were formed on surface of the MF foam by coprecipitation reaction with stearic acid.

  1. 417 – 420

    Micro-fin Structured Poly(butylene terephthalate) Monolith Prepared by Thermally Induced Phase Separation

    , , and

    Poly(butylene terephthalate) (PBT) monoliths were prepared from a solution of linear PBT solution by cooling induced phase separation. The bicontinuous monoliths composed of globules having a micro-fin structure, and the morphological feature has never been reported in the literature. Both the size of the globule and the fin thickness could be controlled by the refrigeration temperature.

  1. 421 – 424

    Green and Facile Synthesis of Highly Photoluminescent Nitrogen-doped Carbon Dots for Sensors and Cell Imaging

    , , , , , , , , and

    The luminescent NCDs with high fluorescence quantum yield (46.01%) were synthesized from ammonium citrate and betaine hydrochloride by one-pot hydrothermal method. NCDs exhibit excellent selective and sensitive detection for H+ and Hg2+ (low detection limit of 1.69 nM for Hg2+). Finally, the low toxicity and highly photoluminescent NCDs are utilized to detect of H+ and Hg2+ in SMMC-7721 living cells.

  1. 425 – 428

    Synthesis of a Peripherally Extended Triptycyl Group as an Aliphatic Steric Protection Group and Its Application to the Kinetic Stabilization of an Aliphatic Sulfenic Acid

    , , , , , and

    A novel triptycene (Trp) based aliphatic steric protection group, Trp* was designed and synthesized. A convenient one-pot synthesis of Trp*Br was achieved, and Trp* group’s potential to offer kinetic stabilization was evaluated in the context of synthesizing a sulfenic acid (RSOH). The isolated Trp*SOH is thermally very stable, which neatly demonstrates the steric protection provided by Trp* group.

  1. 429 – 432

    Hybrids of Two-dimensional Colloidal Crystals and Gold Nanoparticle Assemblies for Effective Surface-enhanced Raman Scattering with High Spatial Reproducibility

    , , , , , , , , , , , , , , , , and

    We have fabricated hybrids of two-dimensional silica colloidal crystals and gold nanospheres for the development of effective SERS platforms with a high spatial reproducibility. The SERS signal on the hybrids was enhanced up to 10.4 times by optimizing the silica diameter, as compared with that on the gold nanospheres-immobilized planar glass plate.

  1. 433 – 435

    Synthesis and Verification of Fluorescent pH Probes Based on 2-Quinolone Platform

    , , , , , and

    In this work, we describe the design and synthesis of a 2-quinolone Schiff base as a novel acidic fluorescent probe. The design strategy of the probe is based on non-classical hydrogen bonding in the form of an intramolecular three-centered hydrogen bond (THB). pH titrations indicate that there is enhancement of fluorescence with increasing proton concentration.

  1. 436 – 439

    Direct Gas-phase CO2 Reduction for Solar Methane Generation Using a Gas Diffusion Electrode with a BiVO4:Mo and a Cu-In-Se Photoanode

    , , and

    Solar methane generation was demonstrated using a Cu-Ag-GDE, and a BiVO4:Mo film as a photoanode combined with a CIS-PV. Instead of using dissolved CO2 in a solution, a gas-phase CO2 was utilized by directly flowing it from one side of the porous GDE at room temperature and atmospheric pressure.

  1. 440 – 443

    The Ring-contraction Reaction of Electron-deficient 3-Silylchromene to 2-Benzylbenzofuran under Mildly Basic Conditions

    , , , and

    A ring-contraction reaction of electron-deficient 3-silylchromenes to 2-benzylbenzofurans was developed. CsF efficiently promoted the reaction at room temperature to afford a variety of 2-benzylbenzofurans in good yields. The reaction is proposed to proceed through an allenyl intermediate.

  1. Regulation in Long-range Magnetic Ordering in 2-D Honeycomb Network of (NBu4)[MIIFeIII(ox)3] (MII = Mn, Fe, Co, Ni, and Cu) Family

    , , , and

    Comprehensive studies on 2-D honeycomb-type magnets (NBu4)[MIIFeIII(ox)3] (MII = Mn, Fe, Co, Ni and Cu) reveal that family orders ferrimagnetically at comparable temperatures (21–43 K), and the mixed-valence FeIIFeIII compound orders at elevated temperature (43 K) relative to other MIIFeIII compounds (21–28 K). The relevance of these magnetic characteristics to other families is reviewed.

  1. 447 – 449

    W-Ti-O Mixed Metal Oxide Catalyzed Dehydrative Cross-etherification of Alcohols

    , , , , , , and

    A dehydrative cross-etherification reation of two different alcohols is achieved in the presence of hydrothermally synthesized tungsten-titanium mixed metal oxide (W-Ti-O) catalyst. The reaction is environmentally benign: any organic solvent is not necessary and the catalyst is readily recovered and reuable.

  1. Copper-mediated Decarboxylative Coupling of Benzamides with Potassium Malonate Monoesters via Directed C–H Cleavage

    , , and

    A copper-mediated decarboxylative coupling of benzamides with potassium malonate monoesters via 8-aminoquinoline-directed C–H cleavage has been developed. This reaction proceeds only by a copper salt to produce the corresponding alkylation products in good yields.

  1. 454 – 457

    Synthesis of Kaitocephalin Facilitated by Three Stereoselective Allylic Transposition Reactions

    , , , , , , , , and

    The stereoselective synthesis of kaitocephalin is described. The central strategy is based on chirality transfer reactions of three secondary alcohols derived from l-arabinose. The Overman rearrangement of an α,β-unsaturated ester, and intramolecular anti-type SN2′ reaction constructed a β-hydroxy-α,α-disubstituted amino acid moiety. The third chirality transfer reaction is the Ichikawa rearrangement. These stereoselective reactions successfully established three contiguous stereocenters embedded in kaitocephalin.

  1. 458 – 460

    The Electronic Structures of Nickel-Palladium Alloy Clusters: A Density Functional Theory Study

    , , , and

    The structure of nickel-palladium (Ni-Pd) alloy clusters was determined using density functional theory (DFT). For the 7- and 13-atom clusters the lowest energy structures are those that maximize the number of Ni-Pd interactions and they behave as quantum dots. For the 55- and 147-atom clusters, the segregated structure is the most stable isomer and they exhibit metallic character.

  1. 461 – 463

    Longifodiol, a Novel Rearranged Triquinane Norsesquiterpene from the Root of Leontopodium Longifolium

    , , , , and

    Leontopodium longifolium is a perennial herb and mainly distributed in the west area of China, the whole plants of L. longifolium were collected from Qinghai Province P. R. China. A novel rearranged triquinane norsesquiterpene was isolated from the roots of L. longifolium, and the absolute configuration was determined by single crystal X-ray diffraction method.

  1. 464 – 467

    Immobilization of Neutral Protease from Bacillus Subtilis via a High-affinity Ligand

    , , , , , and

    The neutral protease from Bacillus Subtilis was immobilized via a high-affinity ligand. l-Arginine was screened as a ligand of neutral proteases because its binding energy with domain B is higher than 11.72 kcal/mol. The neutral protease immobilized on arginine-functionalized supports had higher affinity for the substrate, and exhibited excellent thermostability, pH stability, storage stability and hydrolysis efficiency.

  1. 468 – 471

    CO2 Formation Yields from Different States of CO Adsorbed on Amorphous Solid Water under 157 nm Photoirradiation

    , , , and

    Two adsorption states of CO on amorphous solid water (ASW) consist of CO interacting with dangling OH and CO interacting with bonded OH. Photoirradiation onto the ASW at 157 nm induces CO2 formation through the reaction of CO with OH from the photodissociation of H2O. Preferential formation of CO2 was observed in the CO–dangling OH. Plausible reaction mechanisms are proposed.

  1. 472 – 474

    A Novel Proline-based Acridone Bifunctional Organocatalyst for the Asymmetric Michael Addition of Cyclohexanone


    The rigid and planar acridone moiety was successfully linked with a chiral pyrrolidine template through an amide bond to develop a novel organocatalyst. This organocatalyst competently promotes the asymmetric Michael addition of cyclohexanone to nitroolefins with anisole, naphthalene, and heterocyclic aromatic rings under neat conditions. In this novel approach, the acridone moiety proved effective in chiral organocatalysis.

  1. 475 – 478

    Cinnamaldehyde Hydrogenation over Platinum Nanosheet Intercalated Graphite Layers in Supercritical Carbon Dioxide Solvent

    , , and

    Cinnamaldehyde hydrogenation behaviors of platinum nanosheets intercalated between graphite layers (Pt-GIC) were compated with those of platinum metal particles on graphite surfaces (Pt/Gmix) in supercritical carbon dioxide solvent at 323 K. Higher hydrogenation conversions were obtained with Pt/Gmix than Pt-GIC at the initial stage; however, higer cinnamyl alcohol yields were obtained with Pt-GIC than Pt-Gmix at similar conversions.

  1. 479 – 482

    Geometric Isomerism and Redox Properties of Ruthenium(II/III) Complexes with 3-Hydroxypicolinamide

    , , and

    Two geometric isomers of [RuCl2(PPh3)2(O–N)]-type complex were prepared and characterized by X-ray crystallography (O–N = 3-hydroxypicolinamide). The redox potential of the Ru center was remarkably shifted by isomerization. The UV-vis and electrochemical measurements suggested that slow isomerization from trans(P,Cl),trans(P,N) geometry to trans(P,P) induced the oxidation and deprotonation of the complex.

  1. 483 – 486

    A Drastic Red-shift of Tautomer Fluorescence Depending on the Substitution Pattern of Pyrene–Urea Compounds Generated by Excited State Intermolecular Proton Transfer

    , , , and

    Pyrene–urea compounds, 1PUP and 4PUP were studied concerning the excited state intermolecular proton transfer followed by a tautomer formation in the presence of an acetate ion. Drastic wavelength change and enhancement of fluorescence intensity of tautomer of 4PUP were obtained in comparison to 1PUP. Our findings will contribute to the molecular design of fluorescence materials with pyrene moieties.

  1. 487 – 489

    Theoretical Study of Solvent Effects on the Helical Inversion of ortho-Phenylene Derivatives


    Although ortho-Phenylene derivatives have a high activation energy for helical inversion, these helices undergo rapid helical inversion in acetonitrile. The solvent effect on helical inversion was investigated by using DFT calculations with the PCM. We found that the dihedral angles become small with an increasing dielectric constant, and the ortho-phenylene may take the symmetric helical inversion pathway in solution.

  1. 490 – 493

    One-pot Synthesis of Silver Indium Sulfide Ternary Semiconductor Nanocrystals with Highly Luminescent Performance from Low-toxic Precursors

    , , , , , and

    We serendipitously found that silver indium sulfide (AIS) nanocrystals (NCs), synthesized at a feed Ag:In precursor molar ratio of 1:6, show not only adequately high values of absolute photoluminescence quantum yield (PL-QY) of ~60%, but also prominent PL-QY stability for a long time.

  1. 494 – 496

    The Effect of pH on the Arrangement of 5CB Based Liquid Crystal Containing BDMT-Mercury Complex Using Polarized Optical Microscopy

    , , , , , , and

    This illustration shows thiol group occurring in three states: protonated, deprotonated and as a complex compound with mercury. The process applied to the short and rigid thiol group molecule disrupted the orientation behavior of liquid crystal. This study has proven the ability of short and rigid molecules in altering the orientation behavior of liquid crystal.

  1. 497 – 499

    Enhancement of Ionic Conductivity in Organic Ionic Plastic Crystals by Introducing Racemic Ammonium Ions

    , , , , and

    An organic ionic plastic crystal (OIPC) consisting of racemic N1233′Tf2N (1) was developed and the ionic conductivity is ca. 10−4 S cm−1 at low temperature of 11 °C. NMR and DSC studies revealed that the introduction of racemic cations in OIPCs decreases the intermolecular interactions and it lead to the enhancement in the ionic conductivity.

  1. 500 – 502

    Highly Ordered Lamellar Formation in Dodecylacrylate Copolymer by Humid Annealing

    , , and

    Highly ordered lamellar film of poly(dodecylacrylate-co-acrylic acid) was prepared by simply annealing the spin coating film under humid condition. X-ray diffraction spectrum of the lamellar film showed strong Bragg diffractions at out-of-plane direction whereas the spectrum showed only a wide halo at in-plan direction, which indicate that main chains and side chains take an amorphous state. It was proposed that the segregation between hydrophobic alkyl side chains and hydrophilic main chains with water is the driving force for the lamellar formation.

  1. 503 – 506

    Regioselective Hydroamination of Open-cage Ketolactam Derivatives of C60 with Phenylhydrazine and Water Encapsulation

    , , , , , , and

    Open-cage ketolactam fullerene bearing N-electron donating substituent underwent regioselective mono-hydroamination with phenylhydrazine, the structure of which was confirmed by 2D INADEQUATE 13C NMR studies on a 13C enriched derivative. Furthermore the regioselective double-hydroamination of N-electron withdrawing group substituted ketolactam open-cage fullerene was found to proceed with concomitant water encapsulation.

  1. 510 – 513

    Bilayered Crystalline Organic Semiconductors for Solution-processed OFETs: Asymmetrically-substituted Smectic Liquid Crystal of Benzo[1,2-b:4,5-b′]dithiophene Derivatives

    , , and

    Asymmetric smectic liquid crystals of benzo[1,2-b:4,5-b′]dithiophene substituted with monoalkyl and phenyl groups, 6-alkyl-2-phenyl-benzo[1,2-b:4,5-b′]dithiophene (Ph-BDT-Cn, n = 8, 14), were synthesized. Both compounds exhibited the SmE phase which was suitable for fabricating uniform polycrystalline thin film by spin-coating methods. FET mobility is increased from 0.051 cm2 V−1 s−1 in monolayered crystal to 0.59 cm2 V−1 s−1 in bilayered crystal structures by thermal annealing at 130 °C for 15 min.

  1. 514 – 517

    Theoretical Study on Charge-transfer Excitations of Buckycatcher-Fullerene Complexes

    , , and

    Buckycatcher with C60 complex (BC/C60) can be formed because of the π-π interaction between the convex surface of the C60 and the concave faces of corannulene subunits of BC. We perform DFT calculations on the structures and excitation spectrum of BC molecules and BC/C60 complexes and found that charge-transfer-type excitations from BC to C60 are possible in BC/C60 complexes.

  1. 518 – 519

    Electrodeposition of Tungsten Oxide for Highly Sensitive Acetone Detection at Room Temperature

    , , , , , , and

    Amorphous films of WO3 are electrodeposited on GaN for the first time and characterized by SEM, TEM, XRD, and EDS. The gas sensor based on WO3 films exhibited high sensitivity (6.43), quick response (19 s), fast recovery time (11 s), and good selectivity to acetone gas at room temperature. The as-prepare sensors are promising for non-invasive detection of diabetes.

  1. 520 – 523

    Volume Polarization Holographic Recording in Phenanthrenequinone Doped Poly(MMA-co-BzMA) Photopolymer

    , , , , , , , and

    In our work, we introduced benzyl methacrylate (BzMA) into PQ/PMMA to increase the concentration of PQ (up to 1.15 wt%) within the polymeric media. The enhancement of concentration of PQ brings a means for improving performance of material. This is an efficient method to improve polarization holographic characteristics of PQ/PMMA.

  1. 524 – 527

    Thermoelectric and Thermal Transport Properties in Sumanene Crystals

    , , , , , , and

    Thermoelectric and thermal properties of sumanene have been investigated and compared with those of C60. Although the two distorted π-electron molecules have different symmetry of both molecular and crystal structures, sumanene thin films exhibited giant Seebeck coefficients (>30 mV/K) similar to C60. A characteristic thermal transport in sumanene crystals was also found, where favorable electrical and thermal conducting directions are orthogonal to each other.

  1. 528 – 531

    Effects of Excess PbI2 Addition to CH3NH3PbI3−xClx Perovskite Solar Cells

    , , , , and

    Excess PbI2 addition to the perovskite CH3NH3PbI3(Cl) precursor solutions resulted in increase of the conversion efficiencies of the perovskite solar cells. The recombination between a hole and an electron would be suppressed by the PbI2 formation, and the fill factor and short-circuit current density were increased.

  1. 532 – 535

    Ligand-controlled Behavior of Ag(I)–π Complex as σ-Lewis Acid

    , , , , , and

    An efficient σ-Lewis acidic Ag(I) complex has been obtained by complexation with an electron-donating π-conjugated molecule as a side-on π ligand. The σ-Lewis acidity is possibly derived from the controlled linear coordination around Ag(I) due to the π ligand. A combination of UV-Vis absorption spectroscopy and X-ray absorption near-edge structure analyses clearly revealed that the complex is formed by π ligand-to-Ag(I) charge-transfer interaction. The σ-Lewis acidity was evaluated by IR spectroscopy using 2,6-dimethyl-γ-pyrone as the σ-Lewis basic molecule.

  1. 536 – 539

    The Switching from Cis-to-trans One-way Photoisomerization to Mutual Photoisomerization of a Stilbene–Urea Compound Triggered by Proton Transfer Reaction

    , , , and

    We have developed a new photochromic material containing a stilbene moiety and a urea moiety based on the molecular design involved in photoisomerization and proton transfer. An anthracene–urea–stilbene compounds exhibited cis-to-trans one-way photoisomerization. In addition, we succeeded in the control between mutual and cis-to-trans one-way photoisomerization by the addition of TBAF.

  1. 540 – 543

    Effect of Supporting Electrolyte on the Color/Gloss Characteristics of Electropolymerized Oligo(3-methoxythiophene) Films with Gold-like Luster


    Electropolymerization of 3-methoxythiophene in the presence of tetramethylammonium tetrafluoroborate produced gold-like lustrous films with a higher yellowish tone and specular reflectance as compared to the previously reported films prepared in the presence of lithium perchlorate. The present films contribute not only to the design of coatings but also to enginnering applications such as energy conservation and forgery prevention.

  1. 544 – 547

    Magnetically Recyclable Pd/Fe3O4/g-C3N4 as Efficient Catalyst for the Reduction of Nitrophenol and Suzuki-Miyaura Reaction at Room Temperature


    A novel magnetic stable and recyclable Pd/Fe3O4/g-C3N4 with approachable active palladium nanoparticles (Pd NPs) based on the platelet-like graphitic carbon nitrides (g-C3N4) was designed and synthesised. It displays excellent catalytic activity to reduction of 4-nitrophenol and Suzuki-Miyaura coupling reaction and high turnover frequency (at least 5 runs) with retention of high catalytic activity.

  1. 548 – 550

    The Direction of Photogenerated Charge Carrier Transfer in TiO2–Fe2O3 and TiO2–CuO

    , , , , and

    We prepared TiO2/Fe2O3 and TiO2/CuO bilayer-type photocatalyst film and carried out the photodeposition of Ag to identify the reduction sites. We found that in TiO2/Fe2O3 (CuO) boundary, deposition occurred preferentially on the side of TiO2. This phenomenon can be explained by semiconductor physics principle, not by the classical theory of the interparticle electron transfer.

  1. 551 – 554

    Preparation of Monodisperse LiCoO2 Hollow Particles by Membrane Emulsification Using Anodic Porous Alumina

    , , , and

    Monodisperse LiCoO2 hollow particles were prepared by membrane emulsification using ordered anodic porous alumina. An aqueous solution containing metal salts and a chelating agent was used as the dispersed phase for the emulsification. The uniform-sized emulsion droplets formed by membrane emulsification were solidified on a filter membrane by drying in air. LiCoO2 hollow particles were formed by calcination of the precursor particles.

  1. 555 – 558

    Photocleavable and Polymerizable Peptide for Micropatterning of Bioactive Segments in Polymer Soft Materials

    , , , , , and

    A novel photocleavable and polymerizable oligopeptide has been prepared. Radical copolymerization of this peptide with vinyl monomer produces graft-type peptide-polymer hybrid whose bioactivity can be controlled by light. UV irradiation to the resultant peptide/PHEMA hybrid film enables 2D-patterning of bioactive peptides that can guide cell behavior.

  1. 559 – 561

    Crystal Structure-dependent Thermal Stability and Catalytic Performance of AuRu3 Solid-solution Alloy Nanoparticles

    , , , , , and

    We describe the first investigation into the influence of the crystal structure of AuRu3 alloy nanoparticles (NPs) on their thermal stability and catalytic properties. The hcp-AuRu3 alloy NPs show better thermal stability than the fcc-AuRu3 alloy NPs. Both fcc- and hcp-AuRu3 alloy NPs show onset potentials comparable to Ru NPs. However, the hcp alloy NPs show higher durability than the fcc alloy NPs.

  1. 562 – 565

    Silver(I)-mediated Reaction of 2-Isocyanobiaryl with Alkyl Trifluoroborates: Efficient Synthesis of 6-Alkylated Phenanthridines

    , , , , , , , and

    A silver-mediated free-radical cascade cyclization of isocyanides with potassium alkyl trifluoroborates was developed. The procedure tolerates a series of functional groups, including chloro, bromo, ester, ketone, and amide. Additionally, it is not sensitive to steric hindrance. Thus, this reaction represents a very useful strategy for the production of 6-alkylated phenanthridine derivatives.

  1. 566 – 569

    Influence of Acidification on Carbonate Sediments of Majuro Atoll, Marshall Islands

    , , , , and

    Soil acidification which occurs in the surface sediments of Majuro Atoll promotes selective dissolution of Mg-calcite, which compose the foraminifera (Calcarina spp.) tests. Corroboration by X-ray µ-CT and ImageJ makes it possible to quantify the volume of avoids of Calcarina spp. This technic can also be applied to evaluation of the influence of ocean acidification to small aquatic organisms.

  1. Site- and Regio-selective Incorporation of Carbon Dioxide into the C(sp2)–Si Bond of Benzosilacyclobutenes

    , , and

    A reaction of benzosilacyclobutenes with carbon dioxide is catalyzed by a nickel complex having an N-heterocyclic carbene ligand. Carbon dioxide inserts into the C(sp2)–Si bond in a site- and regio-selective manner to form a carbon–carbon bond, furnishing benzoic acid derivatives after hydrolysis.

  1. 573 – 575

    Tris(trimethylsilyl)silane-mediated Reductive Decyanation and Cyano Transfer Reactions of Malononitriles

    , , , and

    Reductive decyanation reactions of malononitriles were achieved with tris(trimethylsilyl)silane as a radical mediator. The reaction proceeds via a radical chain mechanism involving a silyl radical addition to the malononitrile to form an imidoyl radical followed by α-cleavage to give a silyl isocyanide and an α-cyano radical. The reaction of a 3-butenyl-substituted malononitrile afforded a decyano/cyanosilylation product in good yield through 1,4-cyano transfer.

  1. 576 – 579

    Co(II) Induced Aggregation of Chiral Perylene Derivatives and Macroscopic Formation of Supramolecular Networks


    Herein, we report the metal induced hydrogelation of perylene derivatives. The subtle effect of metal ions which not only help perylene derivatives to generate nanofibers, but also induce molecular chirality of perylene moieties to microscopic level, results helical fiber formation.

  1. 580 – 583

    Block Copolymers of Aliphatic Polycarbonates: Combination of Immortal Epoxide/Carbon-dioxide Copolymerization and Atom Transfer Radical Polymerization of Vinyl Monomers


    Aliphatic polycarbonate (APC) macroinitiators bearing an α-haloester terminal group were successfully prepared by cobalt-catalyzed epoxide/carbon-dioxide copolymerization in the presence of α-halocarboxylic acids as chain transfer agents. The atom transfer radical polymerization of vinyl monomers, such as methyl methacrylate and styrene, from the obtained APC macroinitiators gave the corresponding APC-block-polyalkylene copolymers.

  1. 584 – 586

    Amidation Reaction of Carboxylic Acid with Formamide Derivative Using SO3·pyridine

    , , and

    The amidation reaction of carboxylic acid derivatives was developed by using the sulfur-trioxide pyridine complex (SO3·py) as a commercially available and easily handled oxidant. This method could be applied for the reaction of various aromatic and aliphatic carboxylic acids, including optically active ones, with formamide derivatives to afford the corresponding amides in good to high yields.

  1. 587 – 590

    Effect of Chain Architectures of Star-shaped Poly(ethylene glycol) Macromonomers on Enhancement of Thermal, Mechanical, and Electrochemical Performance of Polymer Electrolyte Membranes

    , , , , , , and

    Polymer electrolyte membranes (PEM) have been fabricated from various star-shaped poly(ethylene glycol) macromonomers. The PEM prepared from the 4-arm star macromonomer network revealed the lowest Tg, and the highest mechanical properties relative to those prepared from 3-arm and linear macromonomers. The PEM based on the 4-arm PEG showed the highest ionic conductivity and also good capacity retention.

  1. 591 – 593

    Switchable Thermal Responsive Interpenetrated Polymer Network Gels of Poly(N-vinylacetamide) and Poly(N-vinylisobutyramide)


    The interpenetrating polymer network gel were prepared by poly(N-vinylacetamide) and poly(N-vinylisobutyramide). This swelleing ratios of the gels changed by temperature. The gel also showed the reversible adsorption and desorption of Rhodamine B. In this study, dynamic adsorption and desorption of Rodamin with the interpenetrating polymer network was investigated.

  1. 594 – 597

    Allenedicarboxylate as a Stereochemically Labile Electrophile for Chiral Organic Base-catalyzed Stereoselective Michael Addition

    , , , , and

    A highly stereoselective Michael addition of α-amino acid-derived 2-benzyloxythiazol-5(4H)-ones to dimethyl allenedicarboxylate was developed by employing P-spiro chiral triaminoiminophosphorane bearing (S)-sec-butyl groups as a catalyst. Theoretical investigation of the transition-state models for the reaction and control experiments suggested the intervention of a dynamic kinetic resolution of the axially chiral allene acceptor.

  1. 598 – 600

    Proton Relaxation Time in Water-soluble Metal Complex Nanoparticles

    , , , , , , , , and

    Water dispersible metal complex nanoparticles were synthesized by using the polyethylene glycol (PEG) coating method. The χmT values at room temperature for the NPs for 13 were determined by the Evans method, and the Proton relaxation times, T1 and T2 were measured by MRI. The proton relaxation times decreased as the χmT value increased.

  1. Self-assembly of Liquid-crystalline Squaramides

    , , , , , and

    Novel liquid-crystalline N,N′-diarylsquaramides were synthesized, and their properties were elucidated. The squaramides exhibited thermotropic columnar liquid-crystalline phases at low temperature including room temperature by supramolecular self-assembly. X-ray crystallographic analysis of the model showed the self-assembly of face-to-faced dimer through π–π interaction. We anticipate that squaramide would be useful core structure to develop a new type of soft materials with unique properties.