荧光法研究对-二甲氨甲基-杯[8]芳烃与二苯胺磺酸钠包结作用

Study on the Inclusion Interaction of Water-Soluble p -(N,N-Dimethylamino)-Calix[8] Arene with Diphenylamine-4-Sulfonic Sodium Salt

用荧光法研究了水溶性对- 二甲氨甲基- 杯-[8]芳烃与二苯胺磺酸钠的相互作用。发现当对-二甲氨甲基- 杯[8]芳烃加入到二苯胺磺酸钠溶液时,二苯胺磺酸钠的荧光峰发生了明显的蓝移,荧光增强,可能的作用机理是二苯胺磺酸钠中的磺酸根与对-二甲氨甲基-杯[8]芳烃中带正电的氮原子之间有较强的静电作用,二苯胺磺酸钠进入了对-二甲氨甲基- 杯[8]芳烃的疏水空腔。同时研究了几种有机溶剂对包结物的荧光强度的影响,初步探讨了其作用机理。

The inclusion interaction of water-soluble p-(N,N-dimethylaminomethyl)-calix[8]arene with diphenylamine-4-sulfonic acid sodium salt was investigated by fluorimetric method. When diphenylamine-4-sulfonic acid sodium salt was added into the p- (N, N-dimethylaminomethyl) -calix[8]arene solution, the emission spectrum of diphenylamioe-4-sulfonic acid sodium salt occurred to a blue shift with the enhancement of the fluorescent intensity. The results show that the formation of the inclusion complex of the p-(N,N-dimethylaminomethyl)-calix[8]arene with diphenylarnine-4-sulfonic acid sodium salt. The influence factors such as the pH value of solutions, solvents on the emission and excitation spectra of the inclusion complex were studied. It indicates that diphenylamine-4-sulfonic acid sodium salt penetrated the cavity of the calix[8]arene via the static action between the sulphonyl group of diphenylamine-4-sulfonic acid sodium salt and nitrogen atom of p-(N,N-dimethylaminomethyl)-calix[8]arene and the hydrophobic interaction of the aromatic rings.