Interaction of Sulfonated Calixarenes with Rhodamine B and its Application to Determine Acetylcholine in a Real Neutral Aqueous Medium
作者：Yongjun Zhang, Weixiao Cao,* Jian Xu
關(guān)鍵字：host-guest chemistry
論文來(lái)源：期刊
具體來(lái)源：Chinese Journal of Chemisty, 2002, 20, 322-326.
發(fā)表時(shí)間：2002年
Complexation between Rhodamine B (RB) and sulfonated calix [n] arenes ( SCnA) were studied by means of UV-vis spectroscopy and fluorescence spectroscopy. In the presence of sulfonated calix [n] arenes, the absorption band of Rhodamine B shifts to longer wavelength and its intensity decreases. The formation of a host-guest type complex also results in the fluorescence quenching of Rhodamine B. The association constants for the RB/SCnA complexes increase in the order of SC4A < SC6A < SC8A and show dependence on the size of the cavities of the calixarenes. The fluorescence is selectively regenerated by adding acetylcholine. Based on this observation, a method to determine acetylcholine in a real neutral aqueous medium was developed.