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Vol. 80, No. 7 (July, 2007)
[PDF version]
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July 11, 2007
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1229-1240
The Jahn–Teller Effect in Chemistry
A. Ceulemans* and E. Lijnen
[Full Text PDF(J-STAGE)] Free Access Article
A structural analysis of electronic degeneracies provides a simple and uniform picture of the molecular JT effect.
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July 11, 2007
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| 1241-1252
Let′s Play with Valence Isomers: The Influence of Different Main Group Elements on Their Relative Stability
M. Soleilhavoup and G. Bertrand*
[Full Text PDF(J-STAGE)] Free Access Article
Valence isomers of benzene, amidinium salt, and butadiene that are not accessible with carbon and/or nitrogen can be prepared using phosphorus and boron.
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| The Chemical Society of Japan Award for 2002 |
Web Release Date:
July 11, 2007
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1253-1267
Role of Modified Nucleosides in the Translation Function of tRNAs from Extreme Thermophilic Bacteria and Animal Mitochondria
K. Watanabe
[Full Text PDF(J-STAGE)] Free Access Article
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The structure and function of four tRNA modified nucleosides from thermophilic bacteria and animal mitochondria were characterized. They function in thermostabilization of tRNA or selective decoding of the proper codons, which serves to highlight the importance of modified nucleosides.
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| The Chemical Society of Japan Award for Creative Work for 2005 |
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July 11, 2007
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1268-1279
Development of New Methods to Introduce Unnatural Functional Molecules into Native Proteins for Protein Engineering
E. Nakata, S. Tsukiji, and I. Hamachi*
[Full Text PDF(J-STAGE)] Free Access Article
Two unique chemistry-based strategies for incorporating unnatural molecules into natural proteins, which include (i) reconstitution of chemically modified cofactors with apo-proteins or -enzymes, and (ii) post-(photo)affinity labeling modification of natural proteins, are highlighted.
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| The Chemical Society of Japan Award for Technical Development for 2004 |
| Web Release Date:
July 11, 2007
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1280-1287
Development and Industrialization of the Vapor-Phase Beckmann Rearrangement Process
Y. Izumi, H. Ichihashi, Y. Shimazu, M. Kitamura,* and H. Sato
[Full Text PDF(J-STAGE)] Free Access Article
The development of a high silica MFI zeolite effective for the vapor-phase Beckmann rearrangement of cyclohexanone oxime made it possible to establish a commercial process for the production of ε-caprolactam without producing any ammonium sulfate, by Sumitomo Chemical Co., Ltd.
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| Web Release Date:
July 11, 2007
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1288-1295
Complexes with FeIII2(μ-O)(μ-OH) Core Surrounded by Hydrogen-Bonding Interaction
Y. Honda, H. Arii, T. Okumura, A. Wada, Y. Funahashi, T. Ozawa, K. Jitsukawa, and H. Masuda*
[Full Text PDF(J-STAGE)] Free Access Article
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μ-Oxo-μ-hydroxodiiron(III) complexes with amino groups as an intramolecular hydrogen-bonding site were synthesized as an active center model for sMMO and RNR-R2, compounds Q and X, respectively, which were characterized by electronic absorption spectroscopic and X-ray structure analytic methods.
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July 11, 2007
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1296-1301
Monodispersed Dimerization of Isoleucine Zipper–Coiled Coil Trimer
A. Kashiwada,* A. Sakakibara, Y. Nakamura, and K. Matsuda
[Full Text PDF(J-STAGE)] Free Access Article
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In this work, we demonstrated the noncovalent dimeric assembly of heterotrimeric α-helical coiled coil.
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July 11, 2007
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1302-1306
Polar Effect of Successive Fluorination of Dimethyl Carbonate on Physical Properties
N. Nanbu,* M. Takehara, S. Watanabe, M. Ue, and Y. Sasaki
[Full Text PDF(J-STAGE)]
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Dynamic viscosity (η) decreased in essentially the same order as relative permittivity (εr): DFDMC > TFDMC > MFDMC > DMC. However, kinematic viscosity (ν) and boiling point of the TFDMC were lower than those of the MFDMC.
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July 11, 2007
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| 1307-1315
Dual Fluorescence in a Schiff Base Derived from an Acridinedione Dye. Excited State Intramolecular Proton Transfer
V. Thiagarajan and P. Ramamurthy*
[Full Text PDF(J-STAGE)] [Supporting Information]
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Nonconjugated, but covalently linked, bichromophoric systems (ADDSA) showed dual fluorescence in aprotic solvents that originates from two different chromophores of the same molecule.
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July 11, 2007
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| 1316-1322
Crystal Structures of Solid Solutions of a Symmetrical Ketone/n-Alkane Binary System
K. Nakasone* and N. Nemoto
[Full Text PDF(J-STAGE)]
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X-ray diffraction measurements were made on single crystal mats of a K39/C39 binary system crystallized from the solution. Phase diagram of K39/C39 system showed two different types of solid solutions formed above and below the critical value fm,c=0.204.
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July 11, 2007
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| 1323-1330
Generalized Anomeric Effect in CH4−nClnS. Energetic and NBO Analyses
H. Roohi* and S. M. Habibi
[Full Text PDF(J-STAGE)]
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The conformational preference of gauche structures over anti ones in the simple model molecules CH4−nClnS (where n=1 and 2) were examined in detail by means of Natural Bond Orbital (NBO) analysis at the HF/6-311+G(d,p)//MP2/6-311+G(d,p) level.
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July 11, 2007
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| 1331-1334
Kinetics of Vitamin E Regeneration by Water-Soluble Antioxidants in Micellar Dispersions
K. Mukai,* T. Isozaki, and S. Nagaoka*
[Full Text PDF(J-STAGE)]
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The kinetics of reactions between some water-soluble antioxidants and vitamin E radicals in micellar dispersions were studied by using a spectrophotometer, and the second-order rate constants for these reactions were compared to those for the corresponding reactions between vitamin C and vitamin E radicals.
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July 11, 2007
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| 1335-1340
Theoretical Design of a Molecular Switch with Controlled Hydrogen Bonds: Electronic and Vibrational Spectra of [Co(2,2′-biimidazole)(C6H4O2)(NH3)2]2
H. Mori and E. Miyoshi*
[Full Text PDF(J-STAGE)]
The low-lying electronic excited states and vibrational states of a proton–electron-coupled inorganic complex [Co(Hbim)(C6H4O2)(NH3)2]2 were theoretically investigated at levels of density functional theory calculations using B3LYP parameters.
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July 11, 2007
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| 1341-1349
Theoretical Design of Monofunctional Psoralen Compounds in Photochemotherapy
A. Nakata, T. Baba, and H. Nakai*
[Full Text PDF(J-STAGE)]
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In this study, a unique open-ring structure of 8-methoxypsoralen in the lowest triplet state, which has low risk of cross-linking DNA, is reported. The open-ring structure was found to be controlled by substituting an electron-donating group at the 8-position of psoralen.
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July 11, 2007
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| 1350-1356
Dichroic Measurements on Dicationic and Tetracationic Porphyrins on Clay Surfaces with Visible-Light-Attenuated Total Reflectance
M. Eguchi, H. Tachibana, S. Takagi,* D. A. Tryk, and H. Inoue*
[Full Text PDF(J-STAGE)]
We succeeded in determining the orientational angles of multicationic porphyrin molecules on clay surfaces. PV-ATR (polarized visible light-ATR) spectroscopy is a good method for analyzing molecular orientations, since it has a high sensitivity, which is sufficient for performing measurements on a monolayer clay sample that is oriented parallel to the glass substrate.
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| Web Release Date:
July 11, 2007
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| 1357-1367
Observation of Halide-Induced Conformational Conversion of Dinuclear Copper Complexes Having a Tetradentate Polypyridine Ligand with a p-Xylene Backbone
T. Nishioka,* S. Mitsui, I. Kinoshita,* T. Koshiyama, and M. Kato
[Full Text PDF(J-STAGE)]
A dinucleating ligand, tetrakis(pyridyl-2-thio)-p-xylene, reacted with copper(I) halides to afford terminal halogeno dicopper complexes in equilibrium with bridging halogeno complexes formed by the loss of one of the terminal halogeno ligands, which were investigated using ESI-MS, NMR spectroscopy, and X-ray diffraction.
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July 11, 2007
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| 1368-1376
Effects of Electrolytes on the Redox Potential and the Rate of the CO Dissociation Reaction of Trinuclear Ruthenium Monocarbonyl Complexes Self-Assembled on an Au(111) Electrode Surface
T. Michi, M. Abe,* J. Matsuno, K. Uosaki,* and Y. Sasaki*
[Full Text PDF(J-STAGE)] [Supporting Information]
The effect of anionic species on the redox behavior and the rate of CO dissociation were studied for densely packed redox-active self-assembled monolayers (SAMs) of a monocarbonyl triruthenium complex [Ru3(μ3-O)(μ-CH3COO)6(CO)(mpy)(C10PY)].
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July 11, 2007
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| 1377-1382
Do Dibenzo[22–30]crown Ethers Bind Secondary Ammonium Ions to Form Pseudorotaxanes?
Y. Tokunaga,* M. Yoshioka, T. Nakamura, T. Goda, R. Nakata, S. Kakuchi, and Y. Shimomura
[Full Text PDF(J-STAGE)] [Supporting Information]
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Dibenzo[22–30]crown ethers and dumbbell-like secondary ammonium salts form pseudorotaxanes in solution. Their association constants were obtained through regulation of the association–dissociation rate to change the stopper groups of dumbbell-like ammonium ions.
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July 11, 2007
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| 1383-1390
Effects of Ionic Surfactants and Cyclodextrins on Hydride-Transfer Reaction of 1-Benzyl-1,4-dihydronicotinamide with Methylene Blue
T. Matsumoto, Y. Liu, Y. Sueishi, and S. Yamamoto*
[Full Text PDF(J-STAGE)]
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The rate constants of reaction of BNAH with MB+ were obtained in the presence of anionic and cationic surfactants and cyclodextrin–cationic surfactant mixtures. The results were explained by the mechanism including the formation of association and inclusion complexes.
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July 11, 2007
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| 1391-1401
Enantioselective Incorporation of Carbon Dioxide into Epoxides Catalyzed by Optically Active Cobalt(II) Complexes
W. Yamada, Y. Kitaichi, H. Tanaka, T. Kojima, M. Sato, T. Ikeno, and T. Yamada*
[Full Text PDF(J-STAGE)]
Enantioselective CO2 fixation with epoxides proceeded with kinetic resolution to afford the corresponding carbonate along with the unreacted epoxide both of which were optically active.
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| Web Release Date:
July 11, 2007
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| 1402-1404
Synthesis and Properties of a 1,3-Thiazole Extended p-Terphenoquinone. A New sp2 Nitrogen Atom-Containing Terquinone Derivative
H. Kurata,* H. Takakuwa, N. Imai, K. Matsumoto, T. Kawase, and M. Oda
[Full Text PDF(J-STAGE)]
2,5-Bis(3,5-di-tert-butyl-4-oxo-2,5-cyclohexadien-1-ylidene)-2,5-dihydrothiazole, which is to our knowledge, the first p-terphenoquinone incorporating a 1,3-thiazole ring, had a sharp and strong absorption in the visible region and good electron affinity enhanced by the sp2 nitrogen atom. Alkali-metal reduction afforded the corresponding dianion which showed strong fluorescence.
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| Web Release Date:
July 11, 2007
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| 1405-1412
Quantitative Analysis of Surface Functional Groups on the Amorphous Carbon in Magnetic Media with XPS Preceded by Chemical Derivatization
H. Kondo* and Y. Nishida
[Full Text PDF(J-STAGE)]
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The amount of hydroxy group on the carbon surface of magnetic media was high, and it did not significantly change even with exposure time to air. In comparison, the carbonyl group rapidly increased and became the most abundant.
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July 11, 2007
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| 1413-1417
Synthesis and Crystal Structures of Fluorinated Chromophores for Second-Order Nonlinear Optics
H. Umezawa,* S. Okada, H. Oikawa, H. Matsuda, and H. Nakanishi
[Full Text PDF(J-STAGE)]
In order to reduce absorption at wavelengths in near IR region used for optical communication, a series of 4-[2-(4-dimethylamino-2,3,5,6-tetrafluorophenyl)ethynyl]-2,3,5,6-tetrafluoro-N,N,N-trimethylanilinium salts were synthesized. The second-order nonlinear optical coefficient of trifluoromethanesulfonate crystal was estimated to be about 14 times greater than that of 2-methyl-4-nitroaniline for diagonal component.
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| Web Release Date:
July 11, 2007
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| 1418-1428
The Alkylation of Biphenyl over Fourteen-Membered Ring Zeolites. The Influence of Zeolite Structure and Alkylating Agent on the Selectivity for 4,4′-Dialkylbiphenyl
Y. Sugi,* H. Maekawa, S. A. R. Mulla, A. Ito, C. Naitoh, K. Nakagawa, K. Komura, Y. Kubota, J.-H. Kim, and G. Seo
[Full Text PDF(J-STAGE)] [Supporting Information]
The alkylation of biphenyl (BP) was examined over fourteen-membered ring zeolites, CIT-5, UTD-1, and SSZ-53. The selectivity for 4,4′-dialkylbiphenyl was controlled by the exclusion from bulky isomers by steric restriction in zeolite channels due to types of zeolite and alkylating agent.
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| Web Release Date:
July 11, 2007
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| 1429-1434
Preparation of Acid-Functionalized Poly(phenylene oxide)s and Poly(phenylene sulfone) and Their Proton Conductivity
T. Tago, N. Kuwashiro, and H. Nishide*
[Full Text PDF(J-STAGE)]
Poly(phenylene oxide)s bearing a phosphoric acid group and a sulfamide acid group and sulfonated poly(phenylene sulfone) were prepared. These highly acid-functionalized polymers gave membranes after compositing with poly(ethylene oxide), some of which showed high proton conductivity of 10−4S cm−1 at 120 °C under dry conditions.
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Errata
| Web Release Date:
July 11, 2007
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1435
Biologically Potent New Organotin(IV) Complexes of N-Maleoyltranexamic Acid
M. I. Khan,* M. K. Baloch, M. Ashfaq, and A. Maqlik
[Full Text PDF(J-STAGE)]
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