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Vol. 79, No. 11 (November, 2006)
[PDF version]
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Web Release Date:
November 9, 2006
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1621-1644
Theoretical Studies on the Structure and Dynamics of Water, Ice, and Clathrate Hydrate
H. Tanaka* and K. Koga
[Full Text PDF(J-STAGE)] Free Access Article
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We investigated divergent characters of thermodynamic functions and liquid–liquid transition in supercooled water, phase behaviors of water confined on the nanoscale, thermodynamic stability of clathrate hydrates, and anomalous properties of ices.
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| Web Release Date:
November 9, 2006
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1645-1664
Chemistry and Biochemistry of Insulin-Mimetic Vanadium and Zinc Complexes. Trial for Treatment of Diabetes Mellitus
H. Sakurai,* A. Katoh, and Y. Yoshikawa
[Full Text PDF(J-STAGE)] Free Access Article
Current state of research on the development of insulin-mimetic and antidiabetic oxovanadium(IV) (VO2+, vanadyl) and zinc(II) complexes is reviewed, including aqueous chemistry, biochemical and physiological functions, treatment of diabetes mellitus in animals, action mechanism, new drug delivery systems and perspective.
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| Web Release Date:
November 9, 2006
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| 1665-1680
Functional Design of Ionic Liquids
H. Ohno
[Full Text PDF(J-STAGE)] Open Access Article
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Ionic liquids, derived from functional salts, are novel liquid materials having characteristics completely different from molecular liquids. The development of materials for electrochemistry is also reviewed.
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| Web Release Date:
November 9, 2006
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1681-1687
One-Pot Synthesis of Soluble Precursors Possessing Both Al–N and B–N Backbones and Their Pyrolysis
Y. Mori and Y. Sugahara*
[Full Text PDF(J-STAGE)] Free Access Article
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The residue, which is obtained from the soluble precursor prepared from LiAlH4, LiBH4, and MeNH2·HCl in one pot via pyrolysis at 1600 °C, has homogeneous distribution of crystalline AlN particles in the Al–B–N–C–O amorphous matrix.
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| Web Release Date:
November 9, 2006
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1688-1695
Ultrasonic and Viscometric Studies of Molecular Interactions in Binary Mixtures of Acetonitrile with Some Amides at Different Temperatures
A. K. Nain
[Full Text PDF(J-STAGE)]
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The ultrasonic speeds and viscosities of binary mixtures of acetonitrile (ACN) with formamide (FA), N,N-dimethylformamide (DMF), N-methylacetamide (NMA), and N,N-dimethylacetamide (DMA), including those of pure liquids in mole fraction range 0 ≤ xi ≤ 1 were measured at different temperatures. A number of parameters were derived. The variation of these parameters with composition and temperature suggests that ACN–amide interaction follows the order: FA > NMA > DMA > DMF.
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| Web Release Date:
November 9, 2006
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| 1696-1703
Chemically Driven Tension Fluctuation and Motion of Interface with Divalent Cation and Di(2-ethylhexyl)phosphoric Acid
A. Shioi,* K. Yamada, R. Shiota, F. Hase, and T. Ban
[Full Text PDF(J-STAGE)]
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Tension-fluctuation and alternate change in pH occur for Ca-containing interface with a surfactant, but not for interfaces containing other cations. The interfacial pressure is N-shaped. The range denoted by T agrees closely with the range where the nonlinear behavior occurs.
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| Web Release Date:
November 9, 2006
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| 1704-1710
Adsorption-Equilibrium Surface Tension of Surfactant Solutions; Examination by the Drop Volume Method
H. Matsuki,* M. Yamanaka, Y. Yamashita, and S. Kaneshina
[Full Text PDF(J-STAGE)]
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In order to acquire adsorption-equilibrium surface tension values using the drop volume method, the circumferential sides near the capillary tip must be non-wettable completely during measurements and vice versa using the Wilhelmy plate method.
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| Web Release Date:
November 9, 2006
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| 1711-1718
Electrocatalytic Activity of Metal-Loaded Reticulated Vitreous Carbon Electrodes for Hydrogen Evolution from Flowing Alkaline Solutions
M. M. Saleh,* M. H. El-Ankily, M. S. El-Deab, and B. E. El-Anadouli
[Full Text PDF(J-STAGE)]
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Metal-loaded RVC electrodes have been used as possible flow-through porous cathodes for the electrolytic generation of hydrogen gas from flowing alkaline solutions. The results are discussed based on a mathematical model. Theoretical results of the distributions of the dimensionless reaction current of the HER using bare RVC. L = 1 cm and [KOH] = 2 M.
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| Web Release Date:
November 9, 2006
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| 1719-1724
A Simple Preconcentration-Storing Technique Based on Sulfide Precipitation for Multipoint Monitoring of Mercury in Rainwater and Snow by Cold Vapor Atomic Absorption Spectrometry
S. Kagaya,* Y. Serikawa, R. Yashima, T. Tanaka, and K. Hasegawa
[Full Text PDF(J-STAGE)]
Mercury(II) ion could be concentrated by adding ZnII ion and a small amount of sulfide ion followed by coagulation/coprecipitation with Zn(OH)2/ZnS. The concentrated mercury(II) could be stored for at least 20 days without any loss of mercury.
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| Web Release Date:
November 9, 2006
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| 1725-1728
Flux Growth and Characterization of Photocatalytic Na2Ti6O13 Whiskers
K. Teshima,* K. Yubuta, S. Sugiura, T. Suzuki, T. Shishido, and S. Oishi
[Full Text PDF(J-STAGE)]
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High quality, hexagonal prismatic Na2Ti6O13 whiskers having lengths of up to 100μm and widths of up to 2.0 μm were easily grown by slow-cooling of a NaCl flux.
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| Web Release Date:
November 9, 2006
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| 1729-1741
Syntheses, Structures, and O2-Reactivities of Copper(I) Complexes with Bis(2-pyridylmethyl)amine and Bis(2-quinolylmethyl)amine Tridentate Ligands
A. Kunishita, T. Osako, Y. Tachi, J. Teraoka,* and S. Itoh*
[Full Text PDF(J-STAGE)] [Supporting Information]
The structure and O2-reactivity of the copper(I) complexes supported by bis[(6-phenyl-2-pyridyl)methyl]amine and bis(2-quinolylmethyl)amine tridentate ligands have been compared to those of the copper(I) complexes with related tridentate ligands.
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| Web Release Date:
November 9, 2006
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| 1742-1744
Development of a New Type of Open Tubular Capillary Liquid Chromatography System Based on Microphase Separation of Mixed Solvents
M. Tabata,* Y. G. Wu, T. Charoenraks, and S. S. Samaratunga
[Full Text PDF(J-STAGE)]
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Utilizing the microheterogenities and preferential solvation phenomena in organic-water mixed solvents a new type of open tubular capillary liquid chromatography (OTCLC) is proposed. Model compounds were separated by using the proposed OTCLC system, and the separation was enhanced by the addition of salts due to the increased microheterogeneity of the mobile phase. Schematic layout of the proposed OTCLC system. 1: Syringe pump; 2: sample injector; 3: drain out; 4: capillary tube; 5: detection unit; 6: recorder.
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| Web Release Date:
November 9, 2006
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| 1745-1747
Sulfur-Bridged Dinuclear and Tetranuclear Complexes Consisting of cis-[Ru(bpy)2]2+ and cis-[Ni(aet)2] Units
T. Yoshimura,* A. Shinohara, M. Hirotsu, K. Ueno, and T. Konno*
[Full Text PDF(J-STAGE)]
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The 1:1 reaction between [Ru(bpy)2(solvent)2]2+ (bpy = 2,2′-bipyridine) and [Ni(aet)2] (aet = 2-aminoethanethiolate) gave a S-bridged RuII2NiII2 tetranuclear complex [{Ru(bpy)2}2{Ni(aet)2}2]4+, while a S-bridged RuIINiII dinuclear complex [Ru(bpy)2{Ni(aet)2}]2+ was obtained by the corresponding 1:2 reaction between [Ru(bpy)2(solvent)2]2+ and [Ni(aet)2].
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| Web Release Date:
November 9, 2006
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| 1748-1752
Use of 2,2′-Dibenzothiazolyl Disulfide-Triphenylphosphine and Lawesson’s Reagent in the Cyclization of β-Amino Acids
S. Kanwar and S. D. Sharma*
[Full Text PDF(J-STAGE)] [Supporting Information]
A high yielding and facile conversion of β-amino acids to β-lactams has been achieved by using two coupling reagents: MBTS-TPP and LR. These reagents can be used as an alternative to the Mukaiyama’s reagent for large-scale reactions due to their low cost and wide applicability.
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| Web Release Date:
November 9, 2006
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| 1753-1757
Synthesis and Photochemical Properties of a New Water-Soluble Coumarin, Designed as a Chromophore for Highly Water-Soluble and Photolabile Protecting Group
N. Senda, A. Momotake, Y. Nishimura, and T. Arai*
[Full Text PDF(J-STAGE)]
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Coumarin derivative 1, designed to be a photolabile protecting group for caged compounds, is water soluble, has high extinction coefficient around 370 nm, and has the fluorescence lifetime of 2.0 ns.
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| Web Release Date:
November 9, 2006
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| 1758-1765
Formation of 2,2′-Diacyl-9,9′-bifluorenylidene Isomers from 2-Acyl-9-bromofluorene and Base-Catalyzed Isomerization of the Formed Alkenes
M. Minabe,* A. Yamazaki, T. Imai, T. Takanezawa, and M. Karikomi
[Full Text PDF(J-STAGE)]
Isomeric 2,2′-diacyl-9,9′-bifluorenylidene is obtained by the reaction of 2-acyl-9-bromofluorene with base. The ratio of Z/E isomers depends upon the length of acyl side chains. This is correlated with the base-promoted facile isomerization of 9,9′-bifluorenylidene.
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| Web Release Date:
November 9, 2006
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| 1766-1772
Geometrical Analysis to Understand the Ability of Halogen Atoms to Act as Hydrogen-Bond Acceptors: A Structural Database Study
S. M. Malathy Sony and M. N. Ponnuswamy*
[Full Text PDF(J-STAGE)] [Supporting Information]
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The hydrogen-bond acceptor capability of halogen atoms was studied with and without different hybridization states of the donors and for various coordination environments of the acceptor atoms. The carbon donor was proved to be a hydrogen bond but within a hydrogen···acceptor distance cutoff.
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| Web Release Date:
November 9, 2006
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| 1773-1780
Generation of an S-Peptide via an N–S Acyl Shift Reaction in a TFA Solution
K. Nakamura, M. Sumida, T. Kawakami, T. Vorherr, and S. Aimoto*
[Full Text PDF(J-STAGE)] [Supporting Information]
An N to S acyl shift reaction occurred when a thiol-containing peptide, such as a Cys-containing peptide or a peptide with 2-mercapto-4,5-dimethoxybenzyl (Dmmb) attached on its backbone, was treated with a TFA solution.
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| Web Release Date:
November 9, 2006
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| 1781-1786
Ring Carbon Functionalization of N-Heterocyclic Carbene Ligand with Ester Groups. Electronic Effect of Ester Groups on Coordination Properties
K. Hara, Y. Kanamori, and M. Sawamura*
[Full Text PDF(J-STAGE)]
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Palladium complexes coordinated by imidazol-2-ylidene ligand functionalized with ester groups at its 4,5-positions were synthesized. σ-Donation of the carbene ligand to the palladium is considerably weakened by the functionalization with the two ester moieties.
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| Web Release Date:
November 9, 2006
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| 1787-1792
Reversible Photodissociation of Hexacarbonyl Tungsten in Cross-Linked Polymers
A. Watanabe, T. Watanabe, Y. J. Shan, K. Tezuka, H. Imoto,* and A. Uedono
[Full Text PDF(J-STAGE)]
Kinetic studies of the reversible dissociation reaction of [W(CO)6] in cross-linked transparent polymers have revealed that the flexibility of polymer chains controls the reaction rate. The reversibility of the reaction is much higher in polymers than in the DMF solution.
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| Web Release Date:
November 9, 2006
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| 1793-1797
Utilization of an Aromatic [4.4.4]Propellane as Thermally Stable Hole-Transport Materials in OLEDs
M. Kimura,* S. Kuwano, K. Shimada, R. Kamata, S. Yasuda, Y. Sawaki, H. Fujikawa, K. Noda, Y. Taga,* and K. Takagi*
[Full Text PDF(J-STAGE)]
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An aromatic propellane is a useful carbon-framework because it can be derivatized to thermally stable hole-transport materials for use in organic light-emitting diodes.
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