Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Volume 81 , Issue 4
Showing 1-15 articles out of 15 articles from the selected issue
Award Accounts
The Chemical Society of Japan Award for Creative Work for 2006
  • Saulius Juodkazis, Vygantas Mizeikis, Shigeki Matsuo, Kosei Ueno, Hiro ...
    2008 Volume 81 Issue 4 Pages 411-448
    Published: April 15, 2008
    Released: April 10, 2008
    JOURNALS OPEN ACCESS
    Three-dimensional laser microfabrication blends microscopy, optical nonlinear phenomena, photomodification, laser trapping, and creates novel possibilities for fabrication of micro- and nano-structures in a wide range of materials. This work reviews various implementations of laser photo-structuring and micromanipulation applied to photo-modification of various materials: glasses, crystals, polymers, gels, and liquid crystals.
    The SEM image of a photo-polymerized 3D structure in SU-8 resist. The 3D structuring of materials will open the possibility to control optical properties, will create new photo-chemical reaction pathways and new materials based on the engineered nano-/micro-structures. Fullsize Image
The Chemical Society of Japan Award for Technical Development for 2006
  • Yuuji Shimasaki, Hitoshi Yano, Hideto Sugiura, Hideyuki Kambe
    2008 Volume 81 Issue 4 Pages 449-459
    Published: April 15, 2008
    Released: April 10, 2008
    JOURNALS FREE ACCESS
    We describe the first continuous production process for N-vinyl-2-pyrrolidone (NVP). The starting materials are γ-butyrolactone (GBL) and monoethanolamine (MEA). The process consists of two stages: the synthesis of N-(2-hydroxyethyl)-2-pyrrolidone (HEP) from GBL and MEA, and the vapor-phase dehydration of HEP to NVP. The key features of this technology are the dehydration catalyst and the vapor-phase reaction system. The catalyst is of very simple composition, being alkali (or alkaline earth) metal oxides–SiO2. Though its acid and base strengths are very weak, its catalytic performance is high. We presume that the excellent catalytic performance is due to the selective adsorption of HEP to the catalyst. Moreover, an IR spectroscopic study of the HEP-adsorbed catalyst indicated that the isolated silanol of the catalyst surface plays an important role. This account describes the progress made from the laboratory study to the industrial process, along with the experimental results and discussion.
    The first continuous production process for N-vinyl-2-pyrrolidone (NVP) was developed. The starting materials are γ-butyrolactone (GBL) and monoethanolamine (MEA). The process consists of two stages: the synthesis of N-(2-hydroxyethyl)-2-pyrrolidone (HEP) from GBL and MEA, and the vapor-phase dehydration of HEP to NVP. Fullsize Image
BCSJ Award Article
  • Masashi Hatanaka, Ryuichi Shiba
    2008 Volume 81 Issue 4 Pages 460-468
    Published: April 15, 2008
    Released: April 10, 2008
    JOURNALS FREE ACCESS
    Ferromagnetic interactions in two-dimensional non-Kekulé polymers were theoretically analyzed under periodic boundary conditions. We constructed two-dimensional Wannier functions in the non-bonding crystal orbitals (NBCOs), and PNBCO (product of NBCO) were their products. Ferromagnetic interactions were attributed to anti-parallel-spin instabilities in PNBCO, similar to one-dimensional non-Kekulé polymers. The instabilities consisted of on-site terms and through-space terms. The former resulted from the squared amplitude of the same atomic site in PNBCO, and the latter resulted from antibonding-through-space interactions between second-nearest-neighbor carbon atomic sites in PNBCO.
    Ferromagnetic interactions in two-dimensional non-Kekulé polymers were analyzed. We constructed two-dimensional Wannier functions in non-bonding crystal orbitals (NBCOs), and PNBCO (product of NBCO) was as their product. The ferromagnetic interactions were attributed to anti-parallel-spin instabilities in PNBCO. Fullsize Image
 
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