Photodimerization of anthracene derivatives in their neat solid state and in solid molecular compounds
作者:I. Zouev、Den-Ke Cao、T. V. Sreevidya、M. Telzhensky、M. Botoshansky、M. Kaftory
DOI:10.1039/c0ce00739k
日期:——
The Cambridge Crystallographic Data Center provides valuable data for analysis and detection of compounds with potential to undergo photodimerization in the solid-state. Such analysis is presented for anthracene derivatives, and showed that there are many compounds that their packing in the crystal meets the requirement needed for [4 + 4] photodimerization in the solid-state. The crystal structures of various neat acyl anthracenes before and after exposure to UV light are described and the molecular structures of the dimers are compared with those obtained by exposing molecular compounds possessing a light-stable host (1,1,6,6-tetraphenyl-2,4-hexadiyne-1,6-diol) and light-sensitive acyl anthracenes. While exposing neat compounds to UV light causes disintegration of the single crystal, the reaction in the molecular compounds proceeds in a single-crystal to single-crystal mode until a certain rate of conversion, and then disintegrates.
剑桥晶体数据中心提供了有价值的数据,用于分析和检测那些在固态下可能发生光二聚反应的化合物。对蒽衍生物的这种分析表明,有许多化合物的晶体堆积满足了固态下[4 + 4]光二聚反应的需求。描述了各种纯净的酰基蒽在暴露于紫外光前后晶体结构的改变,并将二聚体的分子结构与那些通过暴露于具有光稳定性的主体分子(1,1,6,6-四苯基-2,4-己二炔-1,6-二醇)和光敏感的酰基蒽的分子化合物所得到的二聚体进行比较。尽管暴露于紫外光的纯净化合物会导致单晶的解体,但分子化合物中的反应在达到一定转化率之前,是以单晶到单晶的方式进行的,随后才发生解体。