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Vol. 80, No. 11 (November, 2007)
[PDF version]
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November 13, 2007
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2047-2073
Supramolecular Biomaterials. A Modular Approach towards Tissue Engineering
P. Y. W. Dankers and E. W. Meijer*
[Full Text PDF(J-STAGE)] Free Access Article
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Supramolecular biomaterials can be obtained via a modular, self-assembly approach using hydrogen-bonded supramolecular polymers or self-assembling oligopeptide fibers. This results in materials that fulfil the biomaterials trinity of tuneable mechanical properties, degradability and bioactivity, and importantly are dynamic in nature.
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November 13, 2007
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| 2074-2083
Conducting-Polymer-Based Chemical Sensors: Transduction Mechanisms
K. Sugiyasu and T. M. Swager*
[Full Text PDF(J-STAGE)] Free Access Article
This contribution reviews a number of different mechanisms by which analytes can interact with conducting polymers to create changes in their resistivity. The design of specific molecular recognition and the nature of the conducting polymer can impart high-selectivity for different analytes.
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| The Chemical Society of Japan Award for Creative Work for 2005 |
Web Release Date:
November 13, 2007
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2084-2109
Smart Photoresponsive Polymer Systems Organized in Two Dimensions
T. Seki
[Full Text PDF(J-STAGE)] Free Access Article
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Light can be used as a precise stimulus by selecting suitable wavelengths, polarization directions, and intensity, allowing non-contact control. When photoresponsive molecular units are combined with polymeric materials and liquid-crystalline materials, various types of smart photofunctions can be created. This article reviews our research strategies, backgrounds and topics to add smart functions in polymer systems organized in two dimensions.
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November 13, 2007
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2110-2123
Bio-Inspired Membranes for Advanced Polymer Electrolyte Fuel Cells. Anhydrous Proton-Conducting Membrane via Molecular Self-Assembly
I. Honma* and M. Yamada
[Full Text PDF(J-STAGE)] Free Access Article
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The controlled structure in biomolecules is essential for efficient energy conversion in living systems, and biomolecules may produce efficient electrolytes with superior conducting properties. We prepared bio-inspired membranes that showed high proton conductivity under anhydrous conditions.
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November 13, 2007
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2124-2130
Highly Efficient Method for Constructing a Single-Stranded Comb-Like Oligonucleotide via Reversible Photocrosslinking
S. Ogasawara, Y. Yoshimura, M. Hayashi, I. Saito, and K. Fujimoto*
[Full Text PDF(J-STAGE)] Free Access Article
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In this paper, the efficiency and thermodynamic stability for three types of reversible DNA photocrosslinked structures were compared. Moreover, two types of highly efficient methods, where were used to construct the comb-like DNA by using template-directed reversible DNA photocross-linking via 5-carbamoylvinyl-2′-deoxyuridine, are described.
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November 13, 2007
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2131-2136
Enumeration of Topology-Distinct Structures and Possible Stable Structures of Protonated Water Clusters, H3O+(H2O)n−1 (n≤ 5)
M. Jieli, T. Miyake, and M. Aida*
[Full Text PDF(J-STAGE)]
Rooted digraph was used to enumerate all topology-distinct structures of protonated water clusters. Several restrictions which should be satisfied for a structure to be stable, were determined. All the topology-distinct local minima of H3O+(H2O)n−1 (n≤ 5) at MP2/6-31G** are presented.
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November 13, 2007
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| 2137-2144
Driving Force for a Catalyzed Reaction Derived from a Reaction Rate Spectrum
Y. Yasuda
[Full Text PDF(J-STAGE)]
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In falls model for X + Y → Z, GT(t) (=Gibbs free energy of X + Y) may be regarded as the height of water during the reaction and −\mathrmd2GT/\mathrmdt2, the driving force in analogy with gravity.
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November 13, 2007
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| 2145-2148
Kinetic Stability of Gold Fullerenes and the 2(N+1)2 Rule
T. Ishida, H. Kanno, and J. Aihara*
[Full Text PDF(J-STAGE)]
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The 2(N+1)2 rule works as a rule of kinetic stability for deltahedral gold fullerenes.
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November 13, 2007
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| 2149-2156
Matrix-Isolation Infrared Spectroscopic and Density Functional Theory Studies on Reactions of Laser-Ablated Lead and Tin Atoms with Water Molecules
Y.-L. Teng, L. Jiang, S. Han, and Q. Xu*
[Full Text PDF(J-STAGE)]
Reactions of laser-ablated lead and tin atoms with water molecules in excess argon were studied by infrared spectroscopy. Insertion products HMOH and HMO (M = Pb and Sn) formed in the present experiments and were characterized. Absorptions of HSnOH sharply increased upon UV irradiation.
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November 13, 2007
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| 2157-2160
Separation of Sulfur Compounds in Straight-Run Naphtha
Y. Miki,* M. Toba, and Y. Yoshimura
[Full Text PDF(J-STAGE)]
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Sulfur-containing compounds in naphtha were separated from coexisting hydrocarbons by means of column chromatography. A mixture of thiophenes, disulfides, and thiols and a mixture of sulfides and thiacycloalkanes were obtained, and their mass spectra were observed.
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November 13, 2007
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| 2161-2169
Novel Solid-State 8H+-Heteropolyacid. Synthesis and Molecular Structure of a Free-Acid Form of a Dawson-Type Sandwich Complex, [Ti2{P2W15O54(OH2)2}2]8−
H. Murakami, K. Hayashi, I. Tsukada, T. Hasegawa, S. Yoshida, R. Miyano, C. N. Kato, and K. Nomiya*
[Full Text PDF(J-STAGE)] [Supporting Information]
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A novel solid protonic acid of the Dawson sandwich polyoxometalate (POM), i.e., 8H+-heteropolyacid with a formula of H8[1a]·31H2O (1) (1a = [Ti2{P2W15O54(OH2)2}2]8−), was prepared by using three different methods. The molecular structure of 1a showed that it is a di-lacunary species of a saturated sandwich complex, [M4(H2O)2(α-P2W15O56)2]n− (M = transition-metal ions). The acidity of 1 in CH3CN is almost the same as that of the free acid of homo-Dawson POM [P2W18O62]6−.
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November 13, 2007
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| 2170-2176
High-Pressure Synthesis and Structures of New Barium Chromium Sulfides, BaCr4S7 and Ba2Cr5S10, with New Type Face-Sharing CrS6 Structure Units
H. Fukuoka,* Y. Miyaki, and S. Yamanaka
[Full Text PDF(J-STAGE)] Open Access Article
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New sulfides, BaCr4S7 and Ba2Cr5S10, were prepared by using high-pressure and high-temperature reactions. Their structures contain the same subunits composed of face- and/or edge-sharing CrS6. However, one has a 3-D tunnel structure and the other is a 2-D layered compound.
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November 13, 2007
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| 2177-2184
Synthesis of CD3-Labeled 11-cis-Retinals and Application to Solid-State Deuterium NMR Spectroscopy of Rhodopsin
K. Tanaka, A. V. Struts, S. Krane, N. Fujioka, G. F. J. Salgado, K. Martínez-Mayorga, M. F. Brown,* and K. Nakanishi
[Full Text PDF(J-STAGE)]
Synthesis of 11-Z-retinals labeled with 2H at the C5, C9, or C13 methyl groups is described. Solid-state 2H NMR data yield the orientation of retinal within the rhodopsin binding pocket as well as its conformation.
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November 13, 2007
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| 2185-2195
Preparation and Characterization of Two Solid Supramolecular Inclusion Complexes of Guaiacol with β- and γ-Cyclodextrin
L. X. Song,* H. M. Wang, Y. Yang, and P. Xu
[Full Text PDF(J-STAGE)]
Two solid supramolecular inclusion complexes of guaiacol with β- and γ-cyclodextrin were prepared. A consecutive mechanism for the formation and decomposition of the inclusion complex of β-CD with Gua is proposed.
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November 13, 2007
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| 2196-2202
The Effect of Esterifying Chains at the 17-Propionate of Bacteriochlorophylls-c on Their Self-Assembly
T. Mizoguchi and H. Tamiaki*
[Full Text PDF(J-STAGE)]
Bacteriochlorophyll-c (BChl-c) analogs having several esterifying chains at the 17-propionate were prepared by two (bio)synthetic procedures. The effect of the esterifying chain lengths upon the self-aggregation of the synthetic BChls-c was systematically examined in an aqueous solution containing Triton X-100.
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November 13, 2007
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| 2203-2207
Lanthanide Ion-Induced Folding of De Novo Designed Coiled-Coil Polypeptides
A. Kashiwada,* K. Ishida, and K. Matsuda
[Full Text PDF(J-STAGE)]
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In this work, we demonstrated the lanthanide ion-induced coiled-coil-assembled system by using de novo designed polypeptides.
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November 13, 2007
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| 2208-2212
New Steroids from the Soft Coral Nephthea chabrolii
J.-H. Su, F.-Y. Lin, C.-F. Dai, Y.-C. Wu, C.-H. Hsu, and J.-H. Sheu*
[Full Text PDF(J-STAGE)]
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Six new steroids, chabrolosteroids D–I (1–6) were isolated from the organic extract of a Taiwanese soft coral Nephthea chabrolii. The structures of these metabolites were determined by 1D and 2D NMR experiments.
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November 13, 2007
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| 2213-2219
New and Direct Approach to Hypervalent Iodine Compounds from Arenes and Iodine. Straightforward Synthesis of (Diacetoxyiodo)arenes and Diaryliodonium Salts Using Potassium μ-Peroxo-hexaoxodisulfate
M. D. Hossain and T. Kitamura*
[Full Text PDF(J-STAGE)]
One-pot synthesis of hypervalent iodine compounds, such as (diacetoxyiodo)arenes, diaryliodonium triflates and tosylates, from molecular iodine was successfully achieved by using K2S2O8.
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| Web Release Date:
November 13, 2007
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| 2220-2225
Sequential Addition Reactions of Lithium Acetylides and Grignard Reagents to Selenoiminium Salts Leading to 2-Propynyl Tertiary Amines Bearing a Tetrasubstituted Carbon Center
T. Murai,* S. Nogawa, and Y. Mutoh
[Full Text PDF(J-STAGE)] [Supporting Information]
Selenoiminium salts generated from selenoamides and MeOTf were reacted sequentially with lithium acetylides and Grignard reagents to give 2-propynyl amines bearing a tetrasubstituted carbon center. In the reaction with excess Grignard reagents, two molecules of Grignard reagents were incorporated.
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November 13, 2007
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| 2226-2228
Isomer Specific Solvent Effect on Photoisomerization of Photoresponsive Polyphenylene Dendrimers with a Stilbene Core
T. Okamoto, A. Momotake, Y. Shinohara, R. Nagahata, and T. Arai*
[Full Text PDF(J-STAGE)]
Strong solvent effect on the efficiency of cis-to-trans isomerization of stilbene-cored polyphenylene dendrimer with alkyl chain at the periphery was observed.
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| Web Release Date:
November 13, 2007
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| 2229-2231
Efficient Aerobic Oxidation of Phosphines, Phosphites, and Sulfides by Using Trialkylborane
K. Motoshima, A. Sato, H. Yorimitsu,* and K. Oshima*
[Full Text PDF(J-STAGE)]
Treatment of phosphines, phosphites, or sulfides with trialkylborane under air afforded the corresponding oxides in good yields.
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November 13, 2007
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| 2232-2242
The Alkylation of Biphenyl over One-Dimensional Twelve-Membered Ring Zeolites. The Influence of Zeolite Structure and Alkylating Agent on the Selectivity for 4,4′-Dialkylbiphenyl
Y. Sugi,* H. Maekawa, A. Ito, C. Ozawa, T. Shibata, A. Niimi, C. Asaoka, K. Komura, Y. Kubota, J.-Y. Lee, J.-H. Kim, and G. Seo
[Full Text PDF(J-STAGE)] [Supporting Information]
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Alkylation of biphenyl was examined over one-dimensional 12-MR zeolites: MOR, AFI, ATS, and IFR. MOR and AFI gave higher selectivities for 4,4′-dialkylbiphenyl (4,4′-DABP) than ATS and IFR. Shape-selectivities are governed by the differentiation of 4,4′-DABP from other isomers at transition states inside channels of the zeolites.
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November 13, 2007
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| 2243-2245
Hydrogen Gas Diffusion Electrode Prepared from Porous Carbon Spheres Dispersed with Pd–Ag Alloy Nanoparticles
M. Horigome, D. A. Pacheco Tanaka, M. A. Llosa Tanco, W. Yukita, K. Kobayashi, and T. M. Suzuki*
[Full Text PDF(J-STAGE)]
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The performance of hydrogen gas electrode prepared from carbonized Pd–Ag alloy nanoparticles showed a marked dependency on the ratio of Pd and Ag in the alloy.
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