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Volume 41, Issue 2
Displaying 1-25 of 25 articles from this issue
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Highlight Review
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Eiji Shirakawa, Tamio Hayashi2012 Volume 41 Issue 2 Pages 130-134
Published: February 05, 2012
Released on J-STAGE: January 28, 2012
JOURNAL FREE ACCESSTransition metal catalysis plays a leading role in C(sp2)–C(sp2) bond formation through substitution reactions. On the other hand, a similar type of substitution reaction has recently been achieved without the aid of transition-metal catalysts. In this review, recent transition-metal-free coupling reactions of aryl halides with arenes, alkenes, or aryl Grignard reagents are summarized in view of SRN1 reaction.View full abstract
Letter
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Masahiko Hashimoto, Chika Morimoto, Kenta Hagihara, Kazuhiko Tsukagosh ...2012 Volume 41 Issue 2 Pages 135-137
Published: February 05, 2012
Released on J-STAGE: January 28, 2012
JOURNAL RESTRICTED ACCESS
Supplementary materialWe here describe a rapid and convenient sample preparation in a single tube for detecting single nucleotide variation based on oligonucleotide ligation assay (OLA) using a biotinylated primer and a set of four different fluorophore-labeled primers. Only one of the fluorophore-labeled primers that was fully complementary to a DNA template was ligated with the biotin-primer by DNA ligase. We isolated the ligated fragments that carried a biotin at the 3′-end by capture with streptavidin-coated magnetic beads. The distinct fluorescence signature of each ligation product coded the single nucleotide differences.View full abstract -
Kyosuke Michigami, Kazuya Yoshimoto, Masahiko Hayashi2012 Volume 41 Issue 2 Pages 138-139
Published: February 05, 2012
Released on J-STAGE: January 28, 2012
JOURNAL RESTRICTED ACCESSMonoacylation and trifluoromethanesulfonylation of phenolic diols were achieved by the aid of HF–pyridine, whereas diacylation occurred with pyridine alone. Furthermore, HF–pyridine was found to promote the direct conversion of t-butyldimethylsilyl ethers to the corresponding acetates.View full abstract -
Takahiro Nakae, Shingo Mizobuchi, Maki Yano, Takuya Ukai, Hisako Sato, ...2012 Volume 41 Issue 2 Pages 140-141
Published: February 05, 2012
Released on J-STAGE: January 28, 2012
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Supplementary materialA two-step procedure of two-dimensional polymer constructed from benzo[b]trithiophene (BTT) was proposed by electrochemical polymerization and thermal conversion. Electropolymerized BTT oligomer on an electrode was thermally converted to conjugated polymer. Obtained conductive material is found to retain BTT structure by Raman spectra and to extend π conjugation by absorption spectra.View full abstract -
Man Sub Shin, Yoon Kook Park, Sung Chan Nam, Kwang-Jin Hwang2012 Volume 41 Issue 2 Pages 142-144
Published: February 05, 2012
Released on J-STAGE: January 28, 2012
JOURNAL RESTRICTED ACCESSThis investigation demonstrated that bicarbonate ions were selectively formed over carbamate in a CO2 absorption process using piperidine and piperazine derivatives based on 13C NMR. Piperidines with methyl or hydroxymethyl substituent at 2 position (PiP-Me and PiP-MeOH) and 2,5-dimethylpiperazine (DM-PiZ) generated the bicarbonate ions as main adducts in reaction with CO2. The absorptions of CO2 by those aqueous amines (PiP-Me and DM-PiZ) were faster than those of MEA (2-aminoethanol).View full abstract -
Yuri Maeda, Hideki Hashimoto, Takanori Nishioka2012 Volume 41 Issue 2 Pages 145-147
Published: February 05, 2012
Released on J-STAGE: January 28, 2012
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Supplementary materialA bis(hydrosulfido)platinum(II) complex with a bidentate chelate N-heterocyclic carbene ligand was oxidized by O2 to give a linear tetrasulfide complex in the presence of excess hydrogen sulfide and a thiosulfato-bridged dinuclear complex without hydrogen sulfide.View full abstract -
Qinfang Sun, Rong Lu, Anchi Yu2012 Volume 41 Issue 2 Pages 148-150
Published: February 05, 2012
Released on J-STAGE: January 28, 2012
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Supplementary materialWe found that none of twenty natural amino acids quenches the fluorescence of anionic PTP, but phenylalanine, tryptophan, and tyrosine do quench obviously the fluorescence of cationic PFP. The overlaps between the Q-band absorption spectrum of myoglobin, cytochrome c, and horseradish peroxidase and the fluorescence emission spectrum of PTP indicate that the fluorescence quenching of PTP by hemeproteins is via fluorescence resonance energy transfer, not via photoinduced electron transfer.View full abstract -
Yuto Hashimoto, Timon Ortloff, Koji Hirano, Tetsuya Satoh, Carsten Bol ...2012 Volume 41 Issue 2 Pages 151-153
Published: February 05, 2012
Released on J-STAGE: January 28, 2012
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Supplementary materialOxidative alkenylation of N,N-disubstituted benzamides with alkenes accompanied by regioselective C–H bond cleavage proceeds efficiently in the presence of a Ru/Ag catalyst system together with a copper oxidant. The procedure is also applicable to phenylazoles.View full abstract
Editor's Choice
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Biao Zhou, Hiroyuki Yajima, Yuki Idobata, Akiko Kobayashi, Tetsuya Kob ...2012 Volume 41 Issue 2 Pages 154-156
Published: February 05, 2012
Released on J-STAGE: January 28, 2012
JOURNAL OPEN ACCESSA single-component layered molecular conductor, [Au(ptdt)2] (ptdt: propylenedithiotetrathiafulvalenedithiolate) was prepared. Unlike the single-component molecular metal, [Au(tmdt)2] (tmdt: trimethylenetetrathiafulvalenedithiolate) exhibiting three-dimensional compact molecular packing and antiferromagnetic transition at 110 K, the compressed pellet of the microcrystals of [Au(ptdt)2] exhibited fairly high conductivity and small temperature-independent paramagnetic susceptibility.View full abstract
Letter
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Kenichi Ogata, Ayumi Toh, Daisuke Shimada, Shin-ichi Fukuzawa2012 Volume 41 Issue 2 Pages 157-158
Published: February 05, 2012
Released on J-STAGE: January 28, 2012
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Supplementary materialHighly diastereoselective reductive coupling reaction was achieved between an aldehyde and a norbornene to afford an alcohol compound using a nickel/phosphine catalyst system in the presence of a reducing agent. The combination of a PCy3 ligand and triethylborane as the reducing agent proved effective for the reaction. A wide range of aldehydes were found to participate in the reaction with high diastereoselectivities.View full abstract
Editor's Choice
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Ryusuke Futamura, Taku Iiyama, Atom Hamasaki, Sumio Ozeki2012 Volume 41 Issue 2 Pages 159-161
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL OPEN ACCESS
Supplementary materialThe structure of nanometer-order sulfuric acid solution in carbon micropores is investigated by large- and small-angle X-ray scattering experiments. The electron radial distribution function of the nanosolution is different from that of bulk solution. The intermolecular structure of nanosolution does not change with fractional filling. These results and the dependency of density fluctuations of the system with fractional filling showed that the nanometer-order sulfuric acid solutions in carbon micropores form a small molecular assembly with a hydration structure at low fractional filling.View full abstract
Letter
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Shintaro Aono, Koki Urita, Hirotoshi Yamada, Isamu Moriguchi2012 Volume 41 Issue 2 Pages 162-164
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
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Supplementary materialLiMnPO4 nanocrystallite-embedded porous carbons were successfully synthesized within a few minutes by a microwave-heating process. The nanocomposites showed higher charge–discharge capacity and better rate capability than bulk-LiMnPO4 particles synthesized in a similar manner without porous carbons.View full abstract -
Maho Morita, Osamu Ohno, Kiyotake Suenaga2012 Volume 41 Issue 2 Pages 165-167
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL RESTRICTED ACCESSA novel cytotoxic macrolide biselyngbyolide A (1) was isolated from the marine cyanobacterium Lyngbya sp., collected on Tokunoshima Island, Japan. This macrolide was revealed to be structurally related to biselyngbyaside (2). The gross structure of 1 was elucidated based on the extensive application of 2D NMR techniques. The stereostructure was deduced based on analyses of the NOESY spectrum and CD data. Biselyngbyolide A (1) exhibited strong apoptosis-inducing activity against HeLa S3 cells and HL60 cells.View full abstract -
Jun-ichiro Setsune, Shintaro Omae2012 Volume 41 Issue 2 Pages 168-169
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL RESTRICTED ACCESS
Supplementary materialAn expanded porphyrin analogue embedded with binaphthol units provides unidirectional overall helical conformation with hexaanionic N4O4 coordination environment that is suited to support a linear array of three metals.View full abstract
Editor's Choice
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Taizo Mori, Keita Sakakibara, Hiroshi Endo, Misaho Akada, Ken Okamoto, ...2012 Volume 41 Issue 2 Pages 170-172
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL OPEN ACCESS
Supplementary materialNanodisks with uniform height and tunable diameter on the nanometer scale were constructed without any lithographic processes. The disks consisting of an amphiphilic triimide module were formed at the air–water interface in the presence of cyclen as an aqueous shackle and transferred onto substrates by the surface-touching (Langmuir–Schaefer) technique. The 3 nm height of the disks was maintained, whereas the diameter was tunable from 45 to 74 nm by varying surface pressures.View full abstract
Letter
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Inseok Jang, Kyungho Song, Seong-Geun Oh2012 Volume 41 Issue 2 Pages 173-174
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL RESTRICTED ACCESSEchinoid-like TiO2 particles were prepared via modified sol–gel process using PVA as a surface-directing agent in acetic acid solution. The surface of echinoid-like TiO2 particle is significantly rough, and the size of the particles is 800–1100 nm. The specific surface area and average pore size of echinoid-like TiO2 particles are 82.81 m2 g−1 and 11.79 nm, respectively. The photocatalytic activity of echinoid-like TiO2 particles was very high compared with P25 due to larger surface area.View full abstract -
Miki Nakagawa, Hiroki Akutsu, Jun-ichi Yamada, Makoto Karakawa, Yoshio ...2012 Volume 41 Issue 2 Pages 175-177
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL RESTRICTED ACCESS
Supplementary materialA naphthalenediimide derivative 3a carrying TEMPO radical and azobenzene substituent was found to show photoresponsive magnetic as well as FET properties upon illumination. The alteration of its mobility has also been demonstrated by applying magnetic field and hence the FET characteristics of 3a have been proven to be photo- as well as magneto-responsive.View full abstract
Editor's Choice
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Izumi Ishigami, Takeshi Nishigaki, Kyoko Shinzawa-Itoh, Shinya Yoshika ...2012 Volume 41 Issue 2 Pages 178-180
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL OPEN ACCESSA time-resolved resonance Raman analysis shows that the vinyl stretching band (1629 cm−1) of the O2-binding heme of cytochrome c oxidase shifts to 1627 cm−1 instantaneously upon photolysis of CO and remains for at least 5 ms before reaching the static band (1626 cm−1). Within the same time scale, an intermediate vinyl bending mode of another heme appears at 435 cm−1. These results suggest that both hemes cooperatively control O2 binding by forming an intermediate conformation for effective proton pumping.View full abstract
Letter
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Makoto Takafuji, Thiraporn Charoenraks, Jin Izumi, Hirotaka Ihara2012 Volume 41 Issue 2 Pages 181-183
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL RESTRICTED ACCESSMolecular gel-forming glutamide lipid-grafted porous silica particles (Sil-SiDg) are designed and prepared as the stationary phase in high-performance liquid chromatography (HPLC) for molecular shape recognition. It was proven that the glutamide lipids formed a highly oriented structure on the silica surface and showed thermally reversible phase transition like self-assembled molecular gels even on the silica surface. Unprecedented excellent results were achieved in the separation of tocopherols (Vitamin E) using Sil-SiDg as the stationary phase in HPLC analysis.View full abstract -
Kaori Yaguchi, Akihiro Furube, Ryuzi Katoh2012 Volume 41 Issue 2 Pages 184-186
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL RESTRICTED ACCESSUltrathin films of P3HT and P3HT/PCBM prepared on glass and ITO glass substrates by spin-coating were studied by means of highly sensitive absorption spectroscopy. For pristine P3HT films, we discuss the morphology and electronic structure at the interface between the substrate and the P3HT layer. For P3HT/PCBM films, we found that phase separation could be controlled by changing the concentration of the solutions used to prepare the films.View full abstract -
Shosei Kubota, Tetsu Yonezawa, Taro Nagahama, Toshihiro Shimada2012 Volume 41 Issue 2 Pages 187-188
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL RESTRICTED ACCESSWe found that graphite surfaces can be etched by electrochemical reduction in sulfuric acid. Terraces with straight edges crossing with 60°-multiple angles were found on surfaces by AFM observation. It suggests that crystallographic edges can be formed at room temperature in a controlled manner. Layer-by-layer etching of graphene sheets was possible by tuning the etching condition.View full abstract -
Shigeki Sano, Takashi Ichikawa, Michiyasu Nakao, Yoshimitsu Nagao2012 Volume 41 Issue 2 Pages 189-190
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL RESTRICTED ACCESSDeconjugative esterification of optically active 2-(4-phenylcyclohexylidene)acetic acid (1) and 2-(4-tert-butylcyclohexylidene)acetic acid (4) with an axis of chirality afforded the corresponding β,γ-unsaturated esters 2 and 6, each with a center of chirality. Additionally, a plausible reaction mechanism for the intramolecular chirality transfer is described.View full abstract -
Kenta Azuma, Donghyun Son, Kazuhiro Marumoto, Masashi Kijima, Yukihiro ...2012 Volume 41 Issue 2 Pages 191-193
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL OPEN ACCESSWe have successfully observed the ESR signals of radical cations in the thin films of N,N′-di(1-naphthyl)-N,N′-diphenylbenzidine (NPB), typical hole-transport material, for the first time to our best knowledge. In order to characterize the radical cation state, ESR spectra obtained upon chemical doping with iodine are analyzed combined with density functional theory (DFT) calculation. The ESR line width is inversely correlated with doping concentration.View full abstract -
Kazuki Ogata, Daisuke Sasano, Tomoya Yokoi, Katsuhiro Isozaki, Hirofum ...2012 Volume 41 Issue 2 Pages 194-196
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
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Supplementary materialNovel NCN-pincer Pd-complex-bound norvaline derivatives were synthesized. The N- and C-termini-alkylated Pd–norvalines spontaneously assemble into fibrous aggregates to form supramolecular gels, in which the NCN-pincer Pd complex moieties assemble in a highly oriented manner.View full abstract -
Min Young Yeo, Sung Young Park, Insik In2012 Volume 41 Issue 2 Pages 197-199
Published: February 05, 2012
Released on J-STAGE: February 04, 2012
JOURNAL RESTRICTED ACCESS
Supplementary materialStable dispersion of chemically reduced graphene oxide (RGO) is prepared by simple noncovalent interaction with hydroxypropyl cellulose (HPC). Prepared RGO/HPC assembly shows temperature-dependent optical modulation below or above lower critical solution temperature (LCST). Different anchoring modes of HPC chains on RGO plates might contribute to the change of LCST for RGO/HPC assembly at different HPC-to-graphene mass ratio.View full abstract
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