摘要
本文合成了由两个乙二胺分子桥联的β-环糊精二聚体(1).在碱性溶液中1与二价铜离子形成稳定的配合物(2),根据客体分子被包合前后主、客体质子化学位移的变化研究了水溶液中三个主体分子:β-环糊精、1和2分别与对、间和邻氯苯酚及其钠盐的包合反应.通过比较主-客体包合物生成常数的大小可以推断2与有机阴离子客体之间存在多重识别作用.
The β - cyclodextrin dimer (1, host) bridged two 1,2- diaminoethane was synthesized by using a regiospecific capping reagent(m - benzenedisulfonyl chloride). The research we have done indicated that the dimer and Cu2+ ion formed a stable coordination compound(2, host) . The evidence that p-, m - or o - chlorophenol and p - , m - or o- chlorophenolate(guests) wasincluded by β- cyclodextrin, 1 and 2 respectively, comes from 1H NMR spectroscopic studiesperformed on the host - guest inclusion compounds in D2O at 22℃. Comparison of the formation constants of inclusion compounds revealed that there is a multiple recognition mechanism in existence between the host molecule(2) and the organic anion guest.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1996年第8期777-782,共6页
Acta Chimica Sinica
基金
国家科委重大基础研究项目
国家和江苏省自然科学基金资助
