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Vol. 81, No. 8 (August, 2008)
[PDF version]
| The Chemical Society of Japan Award for 2004 |
Web Release Date:
August 11, 2008
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917-926
Photochromism and Molecular Mechanical Devices
M. Irie
[Full Text PDF(J-STAGE)] Free Access Article
Photoisomerization of diarylethene molecules in crystals induces surface morphology as well as shape changes of the crystals. The changes of molecular shape at the molecular level are successfully linked to macro-scale motion of the solid crystals.
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| Web Release Date:
August 11, 2008
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927-937
Surface Modification of TaON with Monoclinic ZrO2 to Produce a Composite Photocatalyst with Enhanced Hydrogen Evolution Activity under Visible Light
K. Maeda, H. Terashima, K. Kase, M. Higashi, M. Tabata, and K. Domen*
[Full Text PDF(J-STAGE)] [Supporting Information] Free Access Article
A composite material consisting of TaON and monoclinic ZrO2 (m-ZrO2), which is prepared by nitridation of m-ZrO2/Ta2O5 composite, exhibits higher visible-light photocatalytic activity for H2 evolution than TaON.
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| Web Release Date:
August 11, 2008
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938-946
Study of the Temperature Dependence of the Reaction of NO3 with CH3I and the Estimation of Its Impact on Atmospheric Iodine Chemistry
Y. Nakano,* H. Ukeguchi, T. Ishiwata, Y. Kanaya, H. Tachikawa, A. Ikeda, S. Sakaki, and M. Kawasaki
[Full Text PDF(J-STAGE)] [Supporting Information]
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The temperature dependence of the reaction of NO3 with CH3I was measured with cavity ring-down spectroscopy. The reaction path was determined by theoretical calculations. Box model simulations suggest the importance of this reaction on the iodine chemistry in the atmosphere.
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| Web Release Date:
August 11, 2008
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| 947-955
Flat Resistivity in θ-Phase Charge-Transfer Salts of Selenium-Containing TMET-TTP Derivatives
Y. Bando,* M. Ashizawa, T. Kawamoto, and T. Mori
[Full Text PDF(J-STAGE)]
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An organic salt of TMET-TTP derivatives, in which sulfur atoms of the inner TTP-skeleton are replaced by Se atoms, shows temperature-independent resistivity. This behavior is related to the enhanced HOMO population on the ethylenedithio part.
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| Web Release Date:
August 11, 2008
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| 956-965
Eigenspectral Analysis of Pendant Vertex- and Pendant Edge-Weighted Graphs of Linear Chains, Cycles, and Stars
B. Mandal
[Full Text PDF(J-STAGE)]
Eigenspectra of three classes of graphs have been found in analytical forms and subsequently been utilized i) to calculate the band (i.e., HOMO–LUMO) gaps, ii) to find out three classes of inversely proportional graphs, and iii) to express eigenspectra of some complicated graphs.
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| Web Release Date:
August 11, 2008
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| 966-978
Magnetic Ordering in Organic-Radical Assemblies
M. Hatanaka* and R. Shiba
[Full Text PDF(J-STAGE)]
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Ferromagnetic interactions in organic-radical assemblies were deduced under periodic boundary conditions. High-spin preferences in the ferromagnetic stacking modes were attributed to anti-parallel-spin instabilities in effective two-electron wave functions consisting of products of NBCOs (PNBCOs), analogous to non-Kekulé polymers.
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| Web Release Date:
August 11, 2008
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| 979-982
Markaracter Table and Q-Conjugacy Character Table for the Non-Rigid Group 1,3,5-Trimethylbenzene
M. R. Darafsheh and A. Moghani*
[Full Text PDF(J-STAGE)]
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The full non-rigid group (f-NRG) of 1,3,5-trimethylbenzene (TMB) has 13 dominant classes (similarly, Q-conjugacy characters) 9 of which are unmaturated (similarly, Q-conjugacy characters such that they are the sum of two irreducible characters).
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| Web Release Date:
August 11, 2008
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| 983-991
Photoreductive Self-Assembly from [MoVI7O24]6− to Anti-Tumoral [H2MoV12O28(OH)12(MoVIO3)4]6− in Aqueous Media
T. Yamase* and E. Ishikawa
[Full Text PDF(J-STAGE)] [Supporting Information] Open Access Article
Prolonged photolysis of [MoVI7O24]6− in aqueous solutions provides the formation of anti-tumoral [H2MoV12O28(OH)12(MoVIO3)4]6− species, the core of which is the well-known ε-isomer ({ε-MoV12}) of the Keggin anion. It is also suggested that the formation of α-Keggin {MoVI12} accompanies photolysis.
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| Web Release Date:
August 11, 2008
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| 992-994
Three-Dimensional Manganese Octacyanoniobate-Based Pyroelectric Ferrimagnet
W. Kosaka, K. Hashimoto, and S. Ohkoshi*
[Full Text PDF(J-STAGE)] [Supporting Information]
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A novel pyroelectric ferrimagnet, [{Mn(pyrazine)(H2O)2}{Mn(H2O)2}{Nb(CN)8}]·4H2O, is synthesized. The crystal consists of a NbIV–CN–MnII linked three-dimensional network, which has an electric polarization. This compound exhibits ferrimagnetism with a Curie temperature of 48 K.
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| Web Release Date:
August 11, 2008
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| 995-1001
Regioselective Synthesis of Antipodal β-Tetrabrominated meso-Tetraarylporphyrins
P. Bhyrappa,* V. Velkannan, K. Karunanithi, B. Varghese, and Harikrishna
[Full Text PDF(J-STAGE)] [Supporting Information]
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A new family of antipodal tetrabrominated tetraarylporphyrins was synthesised regioselectively in moderate to very good yields at ambient or moderate temperatures.
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| Web Release Date:
August 11, 2008
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| 1002-1006
Immobilization of Polythiophene Chirality Induced by a Helix-Forming β-1,3-Glucan Polysaccharide (Schizophyllan) through Sol–Gel Reaction
S. Haraguchi, M. Numata, K. Kaneko, and S. Shinkai*
[Full Text PDF(J-STAGE)]
Composite of polythiophene derivative (PT-1) and helix-forming β-1,3-glucan polysaccharide (SPG) was immobilized by sol–gel reaction occurring on the surface of SPG and the unique characters of PT-1 induced by SPG complexation can be maintained even in the “solid” state.
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| Web Release Date:
August 11, 2008
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| 1007-1011
Virgaurols A–D: Novel Asymmetric Eremophilane Dimers from the Roots of Ligularia virgaurea
Z.-X. Zhang, D.-Q. Fei, and Z.-J. Jia*
[Full Text PDF(J-STAGE)]
Virgaurols A–D (1–4), four novel asymmetric eremophilane sesquiterpene dimers were isolated from the roots of Ligularia virgaurea. Their structures were determined on the basis of comprehensive spectroscopic analysis.
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| Web Release Date:
August 11, 2008
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| 1012-1018
Preparation of Tethered Palladium Catalysis Supported on Gold(111) and Its Surface Characterization by X-ray Photoelectron Spectroscopy (XPS)
R. M. Gulam, M. Hamada, I. Takamiya, M. Shimoda, S. Shuto, A. Nishida, S. Tsukamoto, and M. Arisawa*
[Full Text PDF(J-STAGE)]
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Tethered ligands confined on gold(111) substrate were used to construct heterogeneous palladium catalysts. The decreased catalytic activity upon recycling in the Mizoroki–Heck reaction and XPS results together suggest that S–Au bonds are too weak to survive the Mizoroki–Heck reaction conditions.
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| Web Release Date:
August 11, 2008
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| 1019-1025
Stepwise Palladium-Catalyzed 1,4-Addition of Arylboronic Acids to Enones and Regioselective Baeyer–Villiger Oxidation for Enantioselective Synthesis of β-Diaryl Esters and (+)-(R)-Tolterodine
K. Kobayashi, T. Nishikata, Y. Yamamoto, and N. Miyaura*
[Full Text PDF(J-STAGE)]
Baeyer–Villiger oxidation of chiral β-diaryl ketones synthesized by 1,4-addition of arylboronic acids to β-aryl-α,β-unsaturated ketones catalyzed by a palladium(2+)–chiraphos complex provided optically active β-diaryl esters. The protocol was applied to the synthesis of (R)-tolterodine.
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| Web Release Date:
August 11, 2008
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| 1026-1027
20-N-Methylpurpuramine E: New Bromotyrosine-Derived Metabolite from Okinawan Marine Sponge Pseudoceratina purpurea
T. Teruya, A. Iwasaki, and K. Suenaga*
[Full Text PDF(J-STAGE)]
A new bromotyrosine-derived metabolite, 20-N-methylpurpuramine E (1), was isolated from the marine sponge Pseudoceratina purpurea. The structure was elucidated by spectroscopic analysis. 20-N-Methylpurpuramine E (1) showed weak cytotoxicity against HeLa S3 cells.
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| Web Release Date:
August 11, 2008
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| 1028-1037
Synthesis and Solid-State Polymerization of Triyne and Enediyne Derivatives with Similar π-Conjugated Structures
K. Mizukoshi, S. Okada,* T. Kimura, S. Shimada, and H. Matsuda
[Full Text PDF(J-STAGE)]
Among monomers with similar π-conjugation systems, site selective solid-state polymerization was performed by the introduction of a double bond next to the polymerizable butadiyne moieties.
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