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Vol. 80, No. 8 (August, 2007)
[PDF version]
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August 10, 2007
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1437-1450
Understanding Clusters toward the Design of Functional Molecules and Nanomaterials
N. J. Singh, E. C. Lee, Y. C. Choi, H. M. Lee, and K. S. Kim*
[Full Text PDF(J-STAGE)] Free Access Article
Theoretical investigations of various clusters comprising of water, ions, π-systems, and metals help us design and understand structures and properties of nanowires, nanomaterials, and novel functional ionophores/receptors.
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August 10, 2007
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| 1451-1472
Chiral Glycolate Equivalents for the Asymmetric Synthesis of α-Hydroxycarbonyl Compounds
S. V. Ley,* T. D. Sheppard, R. M. Myers, and M. S. Chorghade
[Full Text PDF(J-STAGE)] Free Access Article
Hydroxycarbonyl compounds are valuable intermediates in asymmetric synthesis, particularly in the preparation of complex structures such as terpenes, carbohydrates, and alkaloids. In addition, the use of chiral glycolic acid equivalents has been the approach of choice for α-hydroxycarbonyl-containing natural products such as herbarumin II and rapamycin.
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August 10, 2007
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1473-1482
Guest-Induced Assembly of PdII-Linked Coordination Nanotubes
M. Tominaga and M. Fujita*
[Full Text PDF(J-STAGE)] Free Access Article
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This account reviews a coordination approach to tubular assemblies via molecular paneling. Families of rectangular planar exo-multidentate organic ligands (molecular panels) can self-assemble into tubular structures possessing very stable, discrete, and well-defined frameworks upon complexation with a PdII building block.
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August 10, 2007
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1483-1491
Unique Helical Triangle Molecular Geometry Induced by Dipole–Dipole Interactions
T. Ishikawa, T. Morita, and S. Kimura*
[Full Text PDF(J-STAGE)] Free Access Article
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Novel helix-peptide wheels, in which three helices were connected by using a template, were prepared, and dipole–dipole interactions among helices were studied in relation to the formation of a planar triangle structure involving three helices.
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August 10, 2007
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1492-1503
Energy-Transfer Mechanism in Photoluminescent Terbium(III) Complexes Causing Their Temperature-Dependence
S. Katagiri, Y. Tsukahara,* Y. Hasegawa, and Y. Wada*
[Full Text PDF(J-STAGE)]
Photoluminescent terbium(III) complexes were investigated from the viewpoint of the temperature-dependence of the emission properties in the temperature range of 80–280 K. The temperature-dependences of terbium(III) complexes were affected not only by the energy gap but also by the energy barriers of the “Forward energy transfer” from the ligand to terbium(III) ion and “Back energy transfer” from terbium(III) ion to the ligand.
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August 10, 2007
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| 1504-1510
Molecular Descriptors of Topology and a Study on Quantitative Structure and Property Relationships
C. Zhou* and C. Nie
[Full Text PDF(J-STAGE)] [Supporting Information]
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Based on a revised distance matrix using equilibrium electronegativities as well as relative bond lengths, a novel equilibrium-electronegative index PE was proposed. Besides PE, the path number P3 was included to model QSPR of hydrocarbons.
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August 10, 2007
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| 1511-1517
Voltammetric Study of Two-Dimensional Phase-Transition Processes of Carboxylated Viologens at an HOPG Electrode as a Typical Organization Process of Molecules Possessing Multiple Interaction Sites
Y. Tanaka and T. Sagara*
[Full Text PDF(J-STAGE)]
The significance of mono- and dicarboxylation of a viologen molecule in the two-dimensional phase transition on an HOPG electrode is described. The advantages and disadvantages of adding interaction sites for the molecular organization process are discussed.
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August 10, 2007
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| 1518-1521
Bond Resonance Energy as an Indicator of Local Aromaticity
J. Aihara,* T. Ishida, and H. Kanno
[Full Text PDF(J-STAGE)]
As for polycyclic aromatic hydrocarbons, bond resonance energy (BRE) for a peripheral π-bond was found to correlate to typical local aromaticity indices (HOMA and BOIA) for a benzene ring, to which a π-bond belongs.
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August 10, 2007
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| 1522-1526
Micellization Behaviour of AOT in the Presence of Sodium Citrate
I. M. Umlong, J. Dey, S. Chanda, and K. Ismail*
[Full Text PDF(J-STAGE)]
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Upon addition of 0.02 mol kg−1 of sodium ion, counter ion binding constant of AOT increased and an abrupt change in polarity index took place.
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August 10, 2007
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| 1527-1533
Ternary Inclusion Complexes of γ-Cyclodextrin with Resorufin and Organic Cations in Aqueous Solution
S. Hamai
[Full Text PDF(J-STAGE)] [Supporting Information]
An organic anion, resorufin (Res), forms organic cation–organic anion complexes with 1,1′-diheptyl-4,4′-bipyridyl dibromide and 1,1′-dimethyl-4,4′-bipyridyl dibromide, whereas Res does not form an organic cation–organic anion complex with trimethyloctylammonium bromide (TMOA). The organic cation–organic anion complexes form ternary inclusion complexes with γ-CD. The ternary inclusion complex is also formed among γ-CD, Res, and TMOA.
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August 10, 2007
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| 1534-1541
Synthesis and Electrochemical Properties of Tetranuclear Di-μ-oxo-bis[di-μ-phenolatodiiron(III)] Complexes
Y. Miyazato,* M. Ohba, H. Sakiyama, and H. Ōkawa*
[Full Text PDF(J-STAGE)] [Supporting Information]
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Tetrairon(III) complexes with a di-μ-oxo-bis[di-μ-phenolatodiiron(III)] core, [{Fe2(L)(L′)}2(μ-O)2](PF6)2, where L2− is a macrocyclic dinucleating compartmental ligand and L′− is an end-cap ligand such as RCO2−, (RO)2PO2−, and (EtO)2PS2−, and their mixed valence Fe4II,II,III,III complexes were prepared.
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August 10, 2007
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| 1542-1548
Application of Rank Annihilation Factor Analysis to the Determination of the Stability Constant of the Complex XL and Rate Constants for the Reaction of X and XL with the Reagent Z Using Kinetic Profiles
A. Afkhami* and L. Khalafi
[Full Text PDF(J-STAGE)]
Rank annihilation factor analysis was used to determine the stability constant of a complex by using the kinetic profiles of the reaction of one of the complexing species in the presence of different amounts of other species.
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August 10, 2007
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| 1549-1555
Synthesis and Characterization of a Novel Quinoxaline-Substituted vic-Dioxime and Its Complexes Containing Bis(12-Diazacrown-4) Derivatives
A. Bilgin,* B. Ertem, and Y. Gök
[Full Text PDF(J-STAGE)]
Quinoxaline-substituted vic-dioxime ligand containing bis(12-diazacrown-4) units and its complexes were synthesized from the appropriate precursor compounds. Also, their cation-binding properties were evaluated for alkali and heavy metal picrates using a solvent extraction technique. The new compounds were characterized by physical and spectroscopic techniques.
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August 10, 2007
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| 1556-1562
Synthesis and Properties of 5-(3-Pyridyl)porphyrinatoruthenium(II) Tetramers
K. Funatsu, N. Yasuda, A. Ichimura, R. Santo, Y. Sasaki, and T. Imamura*
[Full Text PDF(J-STAGE)] [Supporting Information]
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Novel porphyrinatoruthenium(II) tetramers with a rhombic shape were prepared by self-assembly of 5-(3-pyridyl)porphyrinatorutheniums, and characterized. UV–vis spectroscopy and electrochemical measurements revealed that there were strong intramolecular interactions between constituent porphyrin subunits.
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August 10, 2007
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| 1563-1572
Heterometal Assembly in Dendritic Polyphenylazomethines
K. Takanashi, A. Fujii, R. Nakajima, H. Chiba, M. Higuchi, Y. Einaga, and K. Yamamoto*
[Full Text PDF(J-STAGE)] [Supporting Information]
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Fine-controlled metal–organic hybridization is strongly desired for advanced nano-materials. Here, we report a technique to form a dendritic organic structure, which includes various metals, with fine control over the number and location of the metals through a radial stepwise complexation.
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August 10, 2007
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| 1573-1576
Anodic Oxidation of Catechols in the Presence of 1,3-Indandione. A Green Electrosynthetic Approach to New Catechol Derivatives
J.-B. Raoof,* A. Kiani, R. Ojani, and M. A. Khalilzadeh
[Full Text PDF(J-STAGE)]
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The galavanostatic electrochemical synthesis of catechol derivatives performed in good yield.
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August 10, 2007
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| 1577-1579
Enantioselectivity in Electron-Transfer Reactions between Cytochrome c and (S)-/(R)-Ruthenium Complexes. Non-Polar Interaction in a Molecular Recognition Process
T. Kato, I. Takahashi, H. Kumita, T. Ozawa, Y. Funahashi, K. Jitsukawa, and H. Masuda*
[Full Text PDF(J-STAGE)] [Supporting Information]
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Kinetic parameters for the oxidation of horse heart ferrocytochrome c with optically active RuIII complexes indicated an apparent enantioselectivity, which clearly shows that exact molecular recognition is achieved through non-polar interactions rather than electrostatic ones.
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August 10, 2007
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| 1580-1586
Improved Preparative Method for 1,2-Diaryl-3,4-diphosphinidenecyclobutenes and Its Application to the Studies of 1,2-Bis(arylthienyl)-3,4-diphosphinidenecyclobutenes
K. Toyota,* K. Horikawa, R. S. Jensen, K. Omori, S. Kawasaki, S. Ito, M. Yoshifuji,* and N. Morita
[Full Text PDF(J-STAGE)]
Sterically protected 1,2-diaryl-3,4-diphosphinidenecyclobutenes were prepared from 3-aryl-2-bromo-1-(2,4,6-tri-t-butylphenyl)-3-(trimethylsiloxy)-1-phosphapropene using t-butyllithium and 1,2-dibromoethane, and the properties of the products were studied.
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August 10, 2007
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| 1587-1596
Basis Set and Electron Correlation Effects on Lithium Carbenoid Dimerization Energies
L. M. Pratt,* D. H. T. Phan, P. T. T. Tran, and N. V. Nguyen
[Full Text PDF(J-STAGE)] [Supporting Information]
The dimerization free energies of several lithium carbenoids were dependent on the basis sets and electron correlation methods used. Similar dimerization energies were obtained with the G3, MP2, and coupled cluster methods with large basis sets.
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August 10, 2007
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| 1597-1604
Studies on Ring-Closing Metathesis for the Formation of the 11-Membered Ring System of Daphnezomine C
K. Tanabe, A. Fujie, N. Ohmori, Y. Hiraga, S. Kojima,* and K. Ohkata
[Full Text PDF(J-STAGE)]
An examination of the RCM reaction to prepare an 11-membered ring system bearing a tri-substituted alkene revealed that, if a flexible substrate was used, the cyclic product could be obtained in up to 65% yield.
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August 10, 2007
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| 1605-1610
Molecular Mechanism for Antidiabetic Activity of [meso-Tetrakis(4-sulfonatophenyl)porphyrinato]oxovanadium(IV) (VO(tpps)) Complex. Studies on Akt Phosphorylation and GLUT4 Translocation in 3T3-L1 Adipocytes
W. Basuki, M. Hiromura, and H. Sakurai*
[Full Text PDF(J-STAGE)]
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Molecular mechanism of VO(tpps) complex was examined in 3T3-L1. VO(tpps)-induced phosphorylations of IRβ, IRS1, PI3K, Akt, and translocated GLUT4 to the plasma membrane. VO(tpps) was concluded to exhibit antidiabetic activity by activating the insulin signaling pathway.
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August 10, 2007
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| 1611-1616
Synthesis of Perfluorinated Ketones by Utilizing Liquid-Phase Direct Fluorination
T. Okazoe,* K. Watanabe, M. Itoh, D. Shirakawa, H. Takagi, K. Kawahara, and S. Tatematsu
[Full Text PDF(J-STAGE)]
A new synthetic procedure for the preparation of perfluorinated ketones from non-fluorinated sec-alcohols was developed. A key step in the synthetic route was a liquid-phase direct fluorination reaction of partially fluorinated esters with elemental fluorine.
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August 10, 2007
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| 1617-1623
Importance of Molecular-Level Contacts under Solventless Conditions for Chemical Reactions and Self-Assembly
A. Orita, J. Okano, G. Uehara, L. Jiang, and J. Otera*
[Full Text PDF(J-STAGE)] [Supporting Information]
Molecular-level mixing of solid reactants accelerated solventless reactions. A solid film, cast by evaporating a solution of reactants, underwent facile reaction even by simply standing. This pre-mixing method was successfully applied to synthesis of [2]rotaxanes and a Wittig reaction.
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August 10, 2007
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| 1624-1629
Efficient Way to Attach Organosilyl Groups in the Interlayer Space of Layered Solids
Y. Ide and M. Ogawa*
[Full Text PDF(J-STAGE)]
The silylated derivative of magadiite was successfully prepared by concentrating a mixture containing the dodecyltrimethylammonium-exchanged magadiite (C12TMA–magadiite) and a stoichiometric amount of (3-mercaptopropyl)trimethoxysilane.
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August 10, 2007
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| 1630-1634
Effective Suppression of Hydrogen Poisoning from a Ru-Based Catalyst in a Ag–Pd Membrane Reactor
M. Saito, M. Itoh, J. Iwamoto, and K. Machida*
[Full Text PDF(J-STAGE)]
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A Ag–Pd hydrogen-permeable membrane reactor with Ru/(MgO–CeO2) catalyst with the proper amount of atomic hydrogen gave 1.6 times higher catalytic activity towards the synthesis of ammonia than that achieved with non-permeated hydrogen (molecular hydrogen) due to suppression of hydrogen poisoning.
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