取代-N-(2-羟基苯亚乙基)苯胺-银纳米超分子体系荧光光谱

Fluorescence Spectra of the Suprarmolecular System Involving Substituted N-(2-hydroxyl-phenyl-ethylene)-Anilines-Silver Nanoparticles

为了探索在银纳米粒子(AgNPs)的作用下,取代-N-(2-羟基苯亚乙基)苯胺的荧光性能,本文合成了30个取代-N-(2-羟基苯亚乙基)苯胺模型化合物(MC),并制备了银纳米溶液.以无水乙醇为溶剂,分别测定了MC溶液的荧光光谱以及MC-AgNPs溶液的荧光光谱.结果表明:(1)取代-N-(2-羟基苯亚乙基)苯胺及其与银纳米形成超分子体系在乙醇溶剂中均可发射荧光.与取代-N-(2-羟基苯亚乙基)苯胺溶液的荧光波长相比,取代-N-(2-羟基苯亚乙基)苯胺-银纳米超分子体系的荧光波长均有明显变化,偏移值一般在10 nm以上,有的红移,有的蓝移.(2)大部分取代-N-(2-羟基苯亚乙基)苯胺在银纳米的作用下,其荧光发射强度增加,少部分荧光发射强度降低.(3)如果基团对X-Y相同,相对于取代-N-(2-羟基苯亚甲基)苯胺,一般而言,取代-N-(2-羟基苯亚乙基)苯胺在银纳米作用下的荧光发射波长要长一些.本文观察到的实验现象,对于利用银纳米进行生物检测或有机化合物的检测,具有重要参考价值.

To explore the fluorescence properties of substituted N-(2-hydroxyl-phenyl-ethylene)-anilines(2-OH-XPEAY)which are in the action of silver nanoparticles(AgNPs),30 samples of model compounds 2-OHXPEAY(MC)were synthesized and silver nanoparticles solution was prepared.Taking anhydrous ethanol as solvent,the fluorescence spectra of the MC and the MC-AgNPs solutions was measured,respectively.The results show that:(1)both the MC and the supramolecular system MC-AgNPs solutions all can emit fluorescence in the ethanol solvent,compared with the fluorescence wavelengths(Em)of MC solutions,these of MC-AgNPs solutions have change obviously,their Em change value are generally more than 10 nm,in which some of MC-AgNPs solutions appear Em red shift and some of them appear Em blue shift;(2)as regarding the fluorescence emission intensity(H),most of MC-AgNPs solutions increase and only a few MC-AgNPs solutions decrease,compared with the H of MC;(3)in case that the group pairs X-Y is the same,the Em of 2-OHXPEAY is generally longer than that of substituted N-(2-hydroxy-benzylidene)-anilines reported by literature in the action of silver nanoparticles.The observed experimental phenomena have important reference value for using silver nanoparticles to detect biological substance and organic compounds.