Structures and photochromic properties of fulgides based on naphtho[1,2-b]furan and benzo[g]indole
作者:S. K. Balenko、N. I. Makarova、V. P. Rybalkin、E. N. Shepelenko、L. L. Popova、V. V. Tkachev、S. M. Aldoshin、A. V. Metelitsa、V. A. Bren’、V. I. Minkin
DOI:10.1007/s11172-010-0189-x
日期:2010.5
The novel heterocyclic fulgides, i.e. 3-isopropylidene-4-1-[5-methoxy-1-(4-methoxy-phenyl)-2-methyl-1H-benzo[g]indol-3-yl]ethylidene}dihydrofuran-2,5-dione and 3-isopropylidene-4-[1-(1-benzyl-5-methoxy-2-methyl-1H-benzo[g]indol-3-yl)ethylidene]dihydrofuran-2,5-dione, were prepared and isolated as E-isomers. Photochromism, E-configuration, and high resistance to photocoloration—photobleaching of solutions of these fulgides as well as 3-isopropylidene-4-[1-(5-methoxy-2-methylnaphtho[1,2-b]furan-3-yl)ethylidene]dihydro-furan-2,5-dione and 3-isopropylidene-4-[1-(5-methoxy-2-methyl-1-phenyl-1H-benzo[g]indol-3-yl)ethylidene]dihydrofuran-2,5-dione synthesized previously were shown by X-ray diffraction analysis, 1H NMR spectroscopy and electronic absorption spectroscopy. The novel fulgides show fluorescence and high thermal stability of photogenerated cyclic form. Repeated photo-coloration—photobleaching is accompanied by reversible photoinduced E—Z isomerization. Benzo[g]indolyl fulgides are characterized by the longer wavelength absorption of both original (E) and photoisomeric cyclic (C) forms as compared to naphthofuran fulgide.
新型杂环俘精酸酐,即3-异亚丙基-4-1-[5-甲氧基-1-(4-甲氧基-苯基)-2-甲基-1H-苯并[g]吲哚-3-基]亚乙基}二氢呋喃- 2,5-二酮和3-异亚丙基-4-[1-(1-苄基-5-甲氧基-2-甲基-1H-苯并[g]吲哚-3-基)亚乙基]二氢呋喃-2,5-二酮,制备并分离为 E-异构体。光致变色、E-构型和高抗光致变色性——这些俘精酸酐以及 3-异亚丙基-4-[1-(5-甲氧基-2-甲基萘并[1,2-b]呋喃-3-基)溶液的光漂白)亚乙基]二氢-呋喃-2,5-二酮和3-异亚丙基-4-[1-(5-甲氧基-2-甲基-1-苯基-1H-苯并[g]吲哚-3-基)亚乙基]二氢呋喃先前合成的-2,5-二酮通过X射线衍射分析、1H NMR光谱和电子吸收光谱得到证实。新型俘精酸酐显示出光生环状形式的荧光和高热稳定性。重复的光着色——光漂白伴随着可逆的光诱导E-Z异构化。与萘并呋喃俘精酸酐相比,苯并[g]吲哚基俘精酸酐的特征在于原始(E)和光异构环状(C)形式具有更长的波长吸收。