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Vol. 81, No. 3 (March, 2008)
[PDF version]
| The Chemical Society of Japan Award for Creative Work for 2006 |
Web Release Date:
March 13, 2008
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307-319
Structural Features of Dinoflagellate Toxins Underlying Biological Activity as Viewed by NMR
M. Murata,* N. Matsumori, K. Konoki, and T. Oishi
[Full Text PDF(J-STAGE)] Free Access Article
Bioactivity-relevant conformation of potent marine natural products such as ladder-shaped polyether and polyhydroxy–polyene compounds is discussed. NMR-based methodologies to determine relative configuration and to elucidate active conformation are described briefly.
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| The Chemical Society of Japan Award for Young Chemists for 2005 |
| Web Release Date:
March 13, 2008
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320-330
Creation of Cyclic π-Electron-Conjugated Systems through the Functionalization of Fullerenes and Synthesis of Their Multinuclear Metal Complexes
Y. Matsuo
[Full Text PDF(J-STAGE)] Open Access Article
This account article describes the synthesis of a cyclic benzenoid system, [10]cyclophenacene, through a one-step deca-fold addition reaction to [60]fullerene, and its metal complex, double-decker buckyferrocene [(FeCp)2(C60Me10)]. Theoretical studies on the electronic structures of finite-length single-walled carbon nanotubes are also described with respect to the structure of the cyclophenacenes.
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| Web Release Date:
March 13, 2008
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331-344
Complex Formation between a Nucleobase and Tetracyanoquinodimethane Derivatives: Crystal Structures and Transport Properties of Charge-Transfer Solids of Cytosine
T. Murata,* G. Saito,* K. Nishimura, Y. Enomoto, G. Honda, Y. Shimizu, S. Matsui, M. Sakata, O. O. Drozdova, and K. Yakushi
[Full Text PDF(J-STAGE)] [Supporting Information] Free Access Article
Charge-transfer complex formation between cytosine and R-TCNQ derivatives in MeOH yielded three kinds of ionic products; destructed R-TCNQ anion, fully ionic R-TCNQ radical anion, and mixed-valent and conductive R-TCNQ radical anion salts with hemiprotonated cytosine cations.
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| Web Release Date:
March 13, 2008
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345-347
Behavior of Singlet Oxygen in Vitamin E Emulsion
K. Ohara,* T. Origuchi, K. Kawanishi, and S. Nagaoka
[Full Text PDF(J-STAGE)]
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In an emulsion system containing vitamin E (VE), the decay rate of 1O2 phosphorescence decreased with an increase of [VE]. This result suggests that the 1O2 emission mainly occurs in the interface region around the VE oil droplets rather than in the bulk phase.
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| Web Release Date:
March 13, 2008
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| 348-357
Synthesis and Structural Characterization of Dinuclear Manganese(III) Complexes with Cyclam-Based Macrocyclic Ligands Having Schiff-Base Pendant Arms as Chelating Agents
S. Wada and M. Mikuriya*
[Full Text PDF(J-STAGE)]
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Reaction of a series of dodecadentate ligands (H4L), 1,4,8,11-tetrakis(salicylideneaminoethyl)
-1,4,8,11-tetraazacyclotetradecane and its substituted derivatives, with manganese(II) salts afforded ten dinuclear manganese(III) complexes, [Mn2X2L] (X = O2CCH3, O2CC6H5, and N3) which were characterized by analyzing infrared and electronic spectra and determining the temperature dependence of the magnetic susceptibilities (4.5–300 K) and the X-ray crystal structures.
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| Web Release Date:
March 13, 2008
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| 358-360
Structure of a Barium(II) Complex Sandwiched by a Schiff Base Macrocycle
T. Tsukuda,* S. Maeda, M. Yasui, T. Tamane, and T. Tsubomura
[Full Text PDF(J-STAGE)]
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A barium complex sandwiched by an octaaza Schiff base macrocycle prepared by [2 + 2] condensation of diimine and phenanthroline dicarbaldehyde has been studied; the ten-coordinate structure of the complex and an increase of absorption intensity on coordination has been revealed.
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| Web Release Date:
March 13, 2008
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| 361-368
Novel Photoreaction Using Diphenyl Disulfide Derivatives: Photoinduced Oxidation of Allyl Alcohol
T. Tsuboi, Y. Takaguchi,* and S. Tsuboi
[Full Text PDF(J-STAGE)] [Supporting Information]
Allyl alcohols are oxidized to acrylaldehydes using diphenyl disulfide derivative upon photoirradiation. Interestingly, the oxidation reaction occurs in a moderate yield when a dendrimer disulfide is used as a mediator.
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| Web Release Date:
March 13, 2008
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| 369-372
Direct Conversion of Aromatic Ketones to Arenecarboxylic Esters via Carbon–Carbon Bond-Cleavage Reactions
G. Yin, M. Gao, Z. Wang, Y. Wu, and A. Wu*
[Full Text PDF(J-STAGE)] [Supporting Information]
Aromatic methyl ketones, β-keto esters, and trifluoromethyl-1,3-diketones can be directly converted to arenecarboxylic esters via carbon–carbon bond cleavage of pyridinium iodide intermediates in the presence of copper(II) oxide, iodine, pyridine, and potassium carbonate in refluxing ethanol.
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| Web Release Date:
March 13, 2008
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| 373-379
Silylcupration and Copper-Catalyzed Carbomagnesiation of Ynamides: Application to Aza-Claisen Rearrangement
H. Yasui, H. Yorimitsu,* and K. Oshima*
[Full Text PDF(J-STAGE)]
Silylcupration of ynamides afforded (E)-β-silylenamides, after protonolysis, with high regio- and stereoselectivity. Carbomagnesiation of ynamides having an allyl group on the nitrogen with Grignard reagents under copper catalysis followed by aza-Claisen rearrangement provided 4-pentenenitriles.
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| Web Release Date:
March 13, 2008
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| 380-386
Nano-Scale Hydroxyapatite Coating on Macroscopic Silica Fiber Using Carbon Nanofibers as Templates
Q. Wu, H. Ogihara, H. Uchida, M. Sadakane,* Y. Nodasaka, and W. Ueda
[Full Text PDF(J-STAGE)] [Supporting Information]
We have demonstrated a novel procedure for uniform nano-scale hydroxyapatite coating on silica fiber by using carbon nanofibers as effective templates and Ca(NO3)2–H3PO4–methanol mixtures as precursor solution. It was clearly verified that by tuning the formation of carbon nanofibers on silica fiber, it was possible to control the properties of the resulting hydroxyapatite.
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| Web Release Date:
March 13, 2008
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| 387-392
Functionalization of Multi-Walled Carbon Nanotubes Realized by Microwave-Driven Chemistry Inducing Dispersibility in Liquid Media
Y. Tsukahara,* T. Yamauchi, T. Kawamoto, and Y. Wada*
[Full Text PDF(J-STAGE)]
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Carboxyl groups have been successfully introduced to multi-walled carbon nanotubes by oxidation with nitric acid or sodium hypochlorite aqueous solution under microwave irradiation, inducing high dispersibility in water.
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| Web Release Date:
March 13, 2008
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| 393-400
The Role of Adsorption Species in the Formation of Ag Nanostructures by a Microwave-Polyol Route
M. Tsuji,* K. Matsumoto, P. Jiang, R. Matsuo, S. Hikino, X.-L. Tang, and K. S. N. Kamarudin
[Full Text PDF(J-STAGE)]
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Roles of PVP have been studied in microwave-polyol synthesis of silver nanostructures. We found that small amounts of nanorods or nanowires, cubes, and triangular-bipyramids could be produced in the supernatant without the addition of PVP in the presence of Cl−.
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| Web Release Date:
March 13, 2008
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| 401-406
Enhanced Photocatalytic Water Splitting of Hydrous LiCa2Ta3O10 Prepared by Hydrothermal Treatment
T. Mitsuyama, A. Tsutsumi, T. Hata, K. Ikeue, and M. Machida*
[Full Text PDF(J-STAGE)] [Supporting Information]
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The hydration of LiCa2Ta3O10 by hydrothermal treatment could significantly enhance the photocatalytic activity for overall water splitting.
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| Web Release Date:
March 13, 2008
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| 407-409
Preparation of Mesoporous Silica with Well-Defined Hexagonal Array of Pores by Using Octyltrimethylammonium Chloride
T. Sawada,* T. Yano, N. Isshiki, T. Isshiki, and M. Iwamoto
[Full Text PDF(J-STAGE)]
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Hexagonally ordered mesoporous silica MCM-41 was successfully prepared by using octyltrimethylammonium chloride. The BJH pore diameters were 1.4–1.5 nm which was on the prolongation of the correlation line between the chain length of surfactant and the pore diameter.
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