已经在各向同性溶液和水溶性胶囊中探索了能够进行 II 型和/或 I 型光反应的八种 α-烷基二苄基酮(烷基 = CH3 到 n-C8H17)的激发态行为。该研究由两部分组成:探索激发态化学的光化学和揭示胶囊内每个客体包装的核磁共振分析。核磁共振数据(COSY、NOESY 和 TOCSY 实验)表明,α-烷基二苄基酮与由两个空腔形成的胶囊之间的三元配合物在动力学上是稳定的,客体分为三个由 α-烷基长度调节的填充基序链。本质上,宿主充当外部模板,以促进形成不同的客体构象异构体。所有八位客体在己烷或缓冲溶液中辐照后的主要产物来自众所周知的 Norrish I 型反应。然而,在胶囊内,八种酮的激发态化学取决于烷基链长度。第一组由α-己基、α-庚基和α-辛基二苄基酮组成,在宿主内产生大量Norrish II 型产物,而在溶液中,主要产物来自Norrish I 型反应。第二组由α-丁基和α-戊基二苄基
α-Alkyldibenzylketones included in cation exchanged faujasite type zeolites show photobehavior different from that in isotropic organic solvents. Rearrangement and disproportionation which do not contribute in solution are the major processes within the cavities of faujasites. Cation size plays a major role in controlling the pathway pursued by the primary and the secondary radical pair.
Modification of photochemical reactivity by zeolites. Norrish type I and type II reactions of ketones as photochemical probes of the interior of zeolites
作者:V. Ramamurthy、D. R. Corbin、D. F. Eaton
DOI:10.1021/jo00305a024
日期:1990.8
RAMAMURTHY, V.;CORBIN, D. R.;EATON, D. F., J. ORG. CHEM., 55,(1990) N8, C. 5259-5278
作者:RAMAMURTHY, V.、CORBIN, D. R.、EATON, D. F.
DOI:——
日期:——
NAGESHWER, RAO B.;SYAMALA, M. S.;TURRO, N. J.;RAMAMURTHY, V., J. ORG. CHEM., 52,(1987) N 25, 5517-5521
作者:NAGESHWER, RAO B.、SYAMALA, M. S.、TURRO, N. J.、RAMAMURTHY, V.