Asymmetric photoreaction of a diarylethene in hydrogen-bonded cocrystals with chiral molecules
Asymmetric photoreaction of a diarylethene in hydrogen-bonded cocrystals with chiral molecules
复制标题
DOI：
10.1039/c3pp50239b
复制
发表时间：
2014-01-01
影响因子：
3.1
通讯作者：
Irie, Masahiro
中科院分区：
文献类型：
--
作者：
Ichikawa, Tomohiro;Morimoto, Masakazu;Irie, Masahiro
A photochromic diarylethene having 2-methyl-4-pyridyl groups formed chiral cocrystals with (R)- or (S)-1,1'-bi-2-naphthol (BINOL). X-ray crystal structure analysis revealed that the diarylethene forms O-H center dot center dot center dot N type hydrogen bonds with BINOL and the central hexatriene moiety is fixed in P-or M-helix conformation in the cocrystals. The diarylethene molecules underwent reversible cyclization reactions in the single-component crystal as well as in the cocrystals upon alternate irradiation with ultraviolet (UV) and visible light. In the chiral cocrystals, a highly enantioselective photocyclization reaction took place owing to the conformational confinement.
