Novel heterogeneous PET fluorescent sensors selective for transition metal ions or protons: polymers regularly labelled with naphthalimide
作者:Ivo Grabchev、Xuhong Qian、Yi Xiao、Rong Zhang
DOI:10.1039/b111519g
日期:2002.6.24
4-(N,N-Dimethylaminoethylene)amino-N-allyl-1,8-naphthalimide has been synthesized as a new polymerizable dye in monomeric form, and can increase its fluorescence intensity in the presence of protons or metal cations. Two intensely yellow–green fluorescent co-polymers of the dye with methyl methacrylate (MMA) and styrene (ST) have been obtained. These polymeric fluorophores, which could be used as heterogeneous photoinduced electron transfer (PET) fluorescent sensors, show different fluorescence behaviour in the presence of protons and Cu2+ ions, depending on the structures of their main polymer chains. The fluorescence of poly(MMA–co-dye) is not sensitive towards H+ ions, but it is to Cu2+ ions. That of poly(ST–co-dye) is sensitive to the presence of both H+ and Cu2+ ions, the signal increasing and decreasing, respectively.
4-(N,N-二甲基氨基乙烯)氨基-N-烯丙基-1,8-萘二甲酰亚胺被合成为一种新的单体可聚合染料,在质子或金属阳离子存在下可增加其荧光强度。该染料与甲基丙烯酸甲酯(MMA)和苯乙烯(ST)的两种黄绿色荧光共聚物已经问世。这些可用作异质光诱导电子转移(PET)荧光传感器的聚合物荧光团,在质子和 Cu2+ 离子存在下显示出不同的荧光行为,这取决于其主要聚合物链的结构。聚(MMA-共染料)的荧光对 H+离子不敏感,但对 Cu2+离子敏感。聚(ST-共染物)的荧光对 H+和 Cu2+离子都很敏感,信号分别增加和减少。