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Vol. 81, No. 10 (October, 2008)
[PDF version]
| The Chemical Society of Japan Award for Creative Work for 2006 |
Web Release Date:
October 10, 2008
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1183-1195
Heterogeneous Asymmetric Catalysis in Water with Amphiphilic Polymer-Supported Homochiral Palladium Complexes
Y. Uozumi
[Full Text PDF(J-STAGE)] Free Access Article
Catalytic asymmetric organic molecular transformations, including carbon–carbon, carbon–nitrogen, and carbon–oxygen bond-forming reactions, were performed in water under heterogeneous conditions with amphiphilic polymer-supported chiral palladium complexes with high stereoselectivity (up to 99% ee).
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| Web Release Date:
October 10, 2008
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1196-1211
Helical Supramolecular Architectures of Self-Assembled Linear π-Systems
V. K. Praveen, S. S. Babu, C. Vijayakumar, R. Varghese, and A. Ajayaghosh*
[Full Text PDF(J-STAGE)] Free Access Article
Self-assembly of oligo(p-phenylenevinylene)s (OPVs) and oligo(p-phenyleneethynylene)s (OPEs) leads to helical supramolecular structures of different size and shape. Nature of the end functional groups, the side chains, and the π-conjugated backbone strongly influences upon the self-assembly processes.
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| Web Release Date:
October 10, 2008
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1212-1218
Mechanism and Kinetics of Cyanide Decomposition by Ferrate
T. Kamachi, T. Nakayama, and K. Yoshizawa*
[Full Text PDF(J-STAGE)] [Supporting Information] Free Access Article
The mechanism of cyanide oxidation by ferrate in water is discussed using DFT computations. The reaction is initiated by a direct attack of an oxo group of ferrate to the carbon atom of cyanide, followed by an H-atom transfer from cyanide to another oxo group to form an intermediate having cyanate (NCO−). The produced cyanate is oxidized by an oxo ligand of ferrate and exogenous oxygen molecule to CO2 and NO2−.
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| Web Release Date:
October 10, 2008
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1219-1229
Assessment of the Effect of Mixing Rules on Transport Properties of Gas Mixtures
D. Mohammad-Aghaie,* M. M. Papari, J. Moghadasi, and B. Haghighi
[Full Text PDF(J-STAGE)]
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The effects of six different mixing rules were examined on the transport properties of some binary and ternary dilute gas mixtures. The Fit (MADAR-2) mixing rule, gives rise to more acceptable viscosity values, while the Halgren-HHG rule stands over others in predicting thermal conductivity.
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| Web Release Date:
October 10, 2008
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| 1230-1240
Dynamic Quantum Isotope Effects on Multiple Proton-Transfer Reactions
Y. Shigeta,* H. Miyachi, T. Matsui, and K. Hirao
[Full Text PDF(J-STAGE)]
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We defined an effective quantal potential energy hypersurface (EQPES) in order to treat quantum isotope effects in proton-transfer (PT) reactions and geometric stability. We performed EQPES analysis and quantal cumulant dynamics of PT reactions of DNA base pairs.
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| Web Release Date:
October 10, 2008
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| 1241-1249
Specific Oxidative Dehydrogenation Reaction Mechanism over Vanadium(IV/III) Sites in TiO2 with Uniform Mesopores under Visible Light
Y. Izumi,* K. Konishi, and H. Yoshitake
[Full Text PDF(J-STAGE)]
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Kinetic measurements of oxidative dehydrogenation of ethanol and X-ray spectroscopic monitoring over mesoporous V–TiO2 were correlated. Acetaldehyde desorption after H subtraction from ethoxyl species on VIII was rate-limiting. A poisoning effect of product water was overcome by UV treatment.
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| Web Release Date:
October 10, 2008
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| 1250-1257
Reaction Mechanisms of IO Radical Formation from the Reaction of CH3I with Cl Atom in the Presence of O2
S. Enami, Y. Sakamoto, T. Yamanaka, S. Hashimoto, M. Kawasaki,* K. Tonokura, and H. Tachikawa
[Full Text PDF(J-STAGE)]
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The picture shows a schematic diagram of iodine chemistry in marine boundary layer. The present results suggest that non-negligible IO radicals are formed from the reactions of CH3I/CH2I2 + OH/Cl/NO3 at atmospheric conditions.
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| Web Release Date:
October 10, 2008
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| 1258-1266
A Theoretical Insight into the Interaction of Fatty Acids Involved in Royal Jelly with the Human Estrogen Receptor β
T. Matsubara,* H. Sugimoto, and M. Aida
[Full Text PDF(J-STAGE)] [Supporting Information]
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Our calculations show that the fatty acids involved in royal jelly, which exhibit the pharmacological effects similar to those caused by the hormone estrogen, fit the pocket and interact with the active site of the human estrogen receptor.
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| Web Release Date:
October 10, 2008
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| 1267-1273
Monte Carlo Simulations of a Recent Kinetics Mechanism for the Reduction Reaction of NO by CO on Percolation Clusters
J. Cortés* and E. Valencia
[Full Text PDF(J-STAGE)]
Production versus CO fraction in the gas phase at 623 K in the steady state for CO–NO reaction on different percolation clusters showed a change in the character of the transition order only close to the IPC.
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| Web Release Date:
October 10, 2008
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| 1274-1281
Ultraviolet Spectroscopy and Theoretical Calculations of Mono- and Dihydrated Clusters of the Guanine Nucleosides: Possibility of Different Hydration Structures for Guanosine and 2′-Deoxyguanosine
H. Saigusa,* N. Mizuno, H. Asami, K. Takahashi, and M. Tachikawa
[Full Text PDF(J-STAGE)]
Mono- and dihydrated clusters of guanosine and 2′-deoxyguanosine are formed by laser desorption and supersonic jet cooling, and investigated by ultraviolet spectroscopy and theoretical calculations. Specific hydration structures around the sugar group are proposed.
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| Web Release Date:
October 10, 2008
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| 1282-1284
Solvent-Mediated Phase Transformation from J-aggregates of Thiacarbocyanine to H-aggregates
Y. Kitahama and K. Takazawa*
[Full Text PDF(J-STAGE)]
It has been found that the J-aggregates of thiacarbocyanine transform into H-aggregates. The transformation mechanism is found to be solvent-mediated phase transformation that proceeds through dissolution of the J-aggregates and subsequent aggregation into H-aggregates.
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| Web Release Date:
October 10, 2008
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| 1285-1295
Synthesis and Characterization of Ruthenium Complexes Having Tridentate N-Ethyl-N,N-bis(2-pyridylmethyl)amine Coordinating in a Facial or Meridional Fashion
Y. Shimizu, S. Fukui, T. Oi, and H. Nagao*
[Full Text PDF(J-STAGE)] [Supporting Information]
Ruthenium complexes containing a tridentate N-ethyl-N,N-bis(2-pyridylmethyl)amine (N,N-bis(2-pyridylmethyl)ethylamine: bpea) having one amine and two pyridine rings connected with flexible CH2-arms, were synthesized and characterized. Structures of three facial and four meridional bpea complexes were determined by X-ray crystallography.
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| Web Release Date:
October 10, 2008
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| 1296-1298
Preparation, Characterization, and Structures of Dinuclear Cobalt(III) Complexes Triply Bridged by Two μ-Hydroxo and One μ-Carbonato
T. Ama,* T. Yonemura, and T. Yoshimura
[Full Text PDF(J-STAGE)] [Supporting Information]
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N-Methyliminodiacetato and 1,4,7-triazacyclononane complexes containing Co2(μ-CO3)(μ-OH)2 moieties were prepared. In each complex, the dihedral angle between Co–μ-Oμ−OH–μ-O′μ−OH and Co′–μ-Oμ−OH–μ-O′μ−OH planes was ca. 160° and the μ-CO32− plane is almost perpendicular to these planes.
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| Web Release Date:
October 10, 2008
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| 1299-1303
Antibacterial Activity of Short Peptides Based on Pleurocidin and Their Interaction with Phospholipid Membranes
N. Tsuda, Y. Koba, T. Hatakeyama,* S. Ando, M. Shindo, Y. Uchida, and H. Aoyagi
[Full Text PDF(J-STAGE)]
Short peptides lacking the C-terminal portion of Pleurocidin-related peptides were synthesized and their biological activities were examined. Removal of the four C-terminal residues resulted in maintained antibacterial activity and reduction of hemolytic activity.
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| Web Release Date:
October 10, 2008
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| 1304-1307
Polyoxygenated Steroids from a Formosan Soft Coral Sinularia facile
B.-W. Chen, J.-H. Su, C.-F. Dai, Y.-C. Wu, and J.-H. Sheu*
[Full Text PDF(J-STAGE)]
Five new polyohydroxylated steroids 1–5 have been isolated from the soft coral Sinularia facile. The structures of these metabolites were determined by 1D and 2D NMR experiments.
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| Web Release Date:
October 10, 2008
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| 1308-1314
Highly Stereoselective Intramolecular Diels–Alder Reaction of Decatrienoates Activated by t-Butoxycarbonyl, Chloro, and Sulfonyl Groups at the Terminal Position
S. Inoue,* C. Yin, H. Kosugi, A. Nabeta, Y. Sakai, K. Honda, and Y. Hoshino
[Full Text PDF(J-STAGE)] [Supporting Information]
Highly stereoselective intramolecular Diels–Alder (IMDA) reaction of decatrienoates has been achieved by using a t-butoxycarbonyl, chloro, and phenylsulfonyl group as terminal activating groups. Facile acid-catalyzed isomerization of the cycloadduct having a phenylsulfonyl group is also reported.
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| Web Release Date:
October 10, 2008
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| 1315-1321
Photocatalytic Water Splitting into H2 and O2 over Titanate Pyrochlores Ln2Ti2O7 (Ln = Lanthanoid: Eu–Lu)
M. Higashi, R. Abe, H. Sugihara, and K. Domen*
[Full Text PDF(J-STAGE)]
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Most titanate pyrochlore Ln2Ti2O7 (Ln = Eu–Lu) prepared by a polymerized complex method with excess Ln (5%) showed higher photocatalytic activity for overall water splitting than those prepared with stoichiometric ratio of Ln and Ti (1:1).
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| Web Release Date:
October 10, 2008
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| 1322-1330
Synthesis of Benzo[1,2-b:4,3-b ′]dithiophene/triphenylamine Copolymers: Effects of Substituents on Optical and EL Properties
Y. Nishide, H. Osuga,* K. Iwata, K. Tanaka, and H. Sakamoto
[Full Text PDF(J-STAGE)]
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Benzo[1,2-b:4,3-b ′]dithiophene/triphenylamine copolymers P-2eh (with no methyl substituents) and P-Me and P-2Me (with methyl substituents at triphenylamine sites) were synthesized by Stille coupling reactions, and the effects of substitution on the optical, electrochemical, and EL properties of the copolymers were investigated.
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| Web Release Date:
October 10, 2008
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| 1331-1335
Analytical Study of Resistance Drift Phenomena on (PANI)xMoO3 Hybrid Thin Films as Gas Sensors
T. Itoh,* I. Matsubara, W. Shin, N. Izu, and M. Nishibori
[Full Text PDF(J-STAGE)]
Conventional layered organic/MoO3 hybrids as gas sensors have a resistance drift problem. The adsorption of enough oxygen molecules by annealing in air at a higher temperature than operating temperature can reduce the resistance drift phenomena.
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