Control of the Association of Indolylfulgimide with Bis(acylamino)pyridine by Photochromism
作者:Tomoyuki Okuyama、Yayoi Yokoyama、Yasushi Yokoyama
DOI:10.1246/bcsj.74.2181
日期:2001.11
While the association constant of the colored form of a thermally irreversible photochromic indolylfulgimide with 2, 6-bis (octanoylamino)pyridine in toluene at 21 °C was 156 ± 11 mol−1 dm3 through triplex hydrogen bonding, that of its colorless form, generated by visible-light irradiation, was increased to 885 ± 63 mol−1 dm3. This result was supported by PM3 semiempirical molecular–orbital calculations that the difference of the association constants between the C-form and the E-form was mainly due to differences in the structures and conformations of the imide moiety.
在21°C下,热不可逆光变色的吲哚基富鲁米德的有色形式与2,6-双(辛酰氨基)吡啶在甲苯中的结合常数为156 ± 11 mol−1 dm3,主要通过三重氢键结合;而通过可见光照射生成的无色形式,其结合常数增加至885 ± 63 mol−1 dm3。该结果得到了PM3半经验分子轨道计算的支持,表明C型与E型的结合常数差异主要源于酰亚胺部分的结构和构象差异。