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通过E-[4-[2-（4-羟基苯基）乙烯基]吡啶与1,n-二溴烷烃亲核取代反应合成了4,4’-[1,n-亚烷基双[（E）-2-（4-氧苯基）乙烯基]]双吡啶[n=2（Ia）,3（Ib）,4（Ic）,6（Id）].用元素分析、红外、紫外和质子核磁共振谱鉴定了Ia-Id的结构.将Ia-Id的稀溶液用中压汞灯和低压汞灯交替照射,发现其分子内光环加成反应的存在,并且随着亚烷基碳链的延长,反应速度加快.研究还发现锌离子可以与毗陡环上氮原子发生螯合作用使分子内光环加成反应加快.本文化合物荧光很弱,在较高浓度下有较强分子间激基缔合物荧光.
4,4 ’- [1, n-Alkylenebis [(4-hydroxyphenyl) vinyl] pyridine was synthesized by the nucleophilic substitution reaction of E- [4- [2- E) -2- (4-Oxyphenyl) ethenyl] bipyridines [n = 2 (Ia), 3 (Ib), 4 (Ic), 6 (Id) The structure of Ia-Id was identified by proton nuclear magnetic resonance spectroscopy.The dilute solution of Ia-Id was irradiated alternately with a medium pressure mercury lamp and a low pressure mercury lamp to find the presence of an intramolecular halo addition reaction, and as the alkylene carbon chain The reaction speed is accelerated.The study also found that zinc ions can chelate with adjacent nitrogen atoms on the ring to accelerate the intramolecular photocycloaddition reaction.The fluorescence of this compound is very weak and there is strong intermolecular excitations Base Associative Fluorescence.