著者

Shigenori Nagatomo Megumi Nobuhira Yasuhisa Yamamura Masato Sumita Kazuya Saito

出版者

(社)日本化学会

雑誌

Bulletin of the Chemical Society of Japan (ISSN:00092673)

巻号頁・発行日

vol.86, no.5, pp.569-576, 2013-05-15 (Released:2013-05-15)

参考文献数

31

被引用文献数

8

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Nonmonotonous temperature dependence, which suggests formation of closed oligomer(s) via hydrogen-bonds, is detected in heat capacity and dielectric constant of the title compound in the liquid state. The 1H NMR signal of hydroxy protons showed a temperature-dependent fine structure. Quantum-chemical calculations on oligomers of several types revealed that the fine structure is plausibly interpreted as a temperature-dependent formation/destruction of oligomers. A coherent analysis of calorimetric, FT-IR, dielectric, and 1H NMR results shows that the neat liquid of the title compound consists mostly of closed (square) tetramers via H-bonds at lower temperatures, and oligomers with open (or straight) H-bonding and non-H-bonding (monomer) at higher temperature.

著者

Taketoshi NOJIMA Kazuya SAITO

出版者

社団法人 日本機械学会

雑誌

JSME International Journal Series A Solid Mechanics and Material Engineering (ISSN:13447912)

巻号頁・発行日

vol.49, no.1, pp.38-42, 2006 (Released:2006-07-15)

参考文献数

6

被引用文献数

12 65 22

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By folding a thin flat sheet with periodically set slits or punched out portions into the third dimension, ultra-lightweight strong and functional core models are newly devised. The basic idea of this modeling arises from the application of origami technique to engineering. Based on the space filling models, fundamental flat cores and skew type sponge cores have been newly developed. By applying these models, such modified core models as curved cores and 3D honeycomb core are newly devised.