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本文合成了 1 ,n 双 [4 [2 [2 ( 5 苯基 1 ,3,4 二唑基 ) ]乙烯基 ]苯氧基 ]烷烃(n分别为 3,4,6 )和 2 ,2′ 双 [4 [2 [2 ( 5 苯基 1 ,3,4 二唑基 ) ]乙烯基 ]苯氧基 ]乙醚 4个未见文献报导的链状双杂芳基乙烯化合物及其参比物 4 [2 [2 ( 5 苯基 1 ,3,4 二唑基 ) ]乙烯基 ]苯甲醚。用元素分析、紫外、红外、核磁和质谱表征了化合物的结构并用紫外吸收光谱跟踪研究了其在稀溶液中的光化学性质。结果发现 :上述化合物在高压汞灯照射下可同时发生反顺异构化和 [2 + 2 ]分子内光二聚两种反应 ,前者迅速可逆 ,后者缓慢且不可逆。其分子内光二聚体在短波长紫外光照射下极易进行逆 [2 + 2 ]光解开环反应而得到原来的化合物。另外 ,上述化合物的分子内光二聚反应和光解开环反应可反复进行多次 ,再现性较好 ,此类化合物在光信息储存方面具有潜在应用前景
In this paper, 1, n bis [4 [2 [2 (5 phenyl 1, 3,4 oxadiazolyl)] vinyl] phenoxy] Four bis [4 [2 [2 (5-phenyl-1, 3,4-oxadiazolyl)] ethenyl] phenoxy] ethers were reported. 4 [2 [2 (5 phenyl 1, 3,4 oxadiazolyl)] vinyl] anisole. The structure of the compounds was characterized by elemental analysis, UV, IR, NMR and MS. The photochemical properties of the compounds in dilute solution were investigated by UV absorption spectroscopy. The results show that the above compounds can undergo simultaneous isomerization and [2 + 2] intramolecular photodimerization under high pressure mercury lamp irradiation. The former is reversible rapidly and the latter is slow and irreversible. Its intramolecular photodimers can easily undergo the reverse [2 + 2] photolytic ring-opening reaction under the irradiation of short-wavelength ultraviolet light to obtain the original compound. In addition, the intramolecular photodimerization and photodissociation of the above compounds can be repeated several times with good reproducibility, and the potential applications of such compounds in optical information storage