Bulletin of the Chemical Society of Japan Vol. 85 No. 5

Linker-Length Dependence of Crystal Structures and Thermal Properties of Bis(imidazolium) Salts with Tetrafluoroborate Anion

Toshihiko Mandai, Hyuma Masu, Hiroko Seki and Keiko Nishikawa — Wed, 9 May 2012

Conformations of n-alkyl linkers and packing structures in the crystalline state of the bis(imidazolium) salts depend on the length of the linker accompanied with the change of thermal properties.

One-Step Synthesis and Association of Alkylimidovanadium(V) Compounds

Masafumi Nishina, Toshiyuki Moriuchi and Toshikazu Hirao — Wed, 9 May 2012

One-step synthesis of alkylimidovanadium(V) triisopropoxides was performed by the reaction of the corresponding alkylamines with [VO(Oi-Pr)₃] in the presence of sodium hydride as a base under relatively mild conditions, wherein controlled association was observed.

Stability of Amino Acids and Related Compounds in Simulated Submarine Hydrothermal Systems

Wed, 9 May 2012

It has been suggested that complex precursors were delivered to the primeval ocean by extraterrestrial bodies or from primitive atmosphere. Their survival and alteration in submarine hydrothermal systems (SHSs) were investigated. They were more stable in SHSs than free amino acids.

Modeling Transport Properties of N2–Noble Gas Mixtures at Low and Moderate Densities

Delara Mohammad-Aghaie, Mohammad Mehdi Papari and Farshid Zargari — Wed, 9 May 2012

Interaction potential energies of N₂–noble gas mixtures, obtained via the inversion of reduced viscosity collision integrals, were fitted to yield analytical potential energy forms. The potentials were then applied to Schreiber et al., Chapman–Enskog and Vesovic–Wakeham theories to calculate the low- and high-density transport properties of the studied mixtures. Acceptable agreement between the calculated transport properties and the available literature data confirms the validity of obtained potential energy functions.

Observation of Different Molecular Alignments of [Ni(salphen)] Substituted by a Different Number of Octyl Groups at HOPG Surface

Wed, 9 May 2012

The change in self-assembled structures of salphen complex analogues by the number of long alkyl chains introduced is studied. The self-assembled structures are defined by STM at liquid–solid interface and ¹H NMR spectra in solvent.

Development of Ammonia Gas Sensors Based on Trivalent Al3+ Cation Conducting Solid Electrolyte

Tsukasa Nagai, Shinji Tamura and Nobuhito Imanaka — Wed, 9 May 2012

Solid electrolyte type ammonia gas sensors were fabricated using Al³⁺ ion conducting (Al_0.2Zr_0.8)_20/19Nb(PO₄)₃ solid electrolyte with aluminum film as a reference electrode. The present sensors exhibited the superior sensing performances at wide temperature range from 170–300 °C, by according to the choice of auxiliary sensing electrode.