A highly zinc-selective ratiometric fluorescent probe based on AIE luminogen functionalized coordination polymer nanoparticles
A highly zinc-selective ratiometric fluorescent probe based on AIE luminogen functionalized coordination polymer nanoparticles
复制标题
基于AIE发光体功能化配位聚合物纳米粒子的高锌选择性比率荧光探针
DOI：
10.1039/c6ra28551a
复制
发表时间：
2017-01-01
期刊：
影响因子：
3.9
通讯作者：
Ding, Zhongtao
中科院分区：
文献类型：
--
作者：
Lin, Na;Zhang, Qin;Ding, Zhongtao
金属离子(或簇合物)与有机桥联配体通过配位键自组装而形成的配位聚合物纳米颗粒(CPN)为设计多功能纳米颗粒提供了独特的平台。在这项工作中，我们报道了一种基于CPN的锌离子比率荧光探针，该CPN是由AIE荧光团HDBB分子与金属离子制备的。含Tb3+的HDBB分子组成的CPN(Tb-HDBB-CPN)在590 nm处有一个基质配位诱导发射峰，而HDBB分子与Zn2+形成的CPN(称为Zn-HDBB-CPNS)具有独特的荧光性质，其蓝色发射峰波长为470 nm。基于Tb-HDBB-CPN与锌离子的阳离子交换过程，研制了一种测定水溶液中锌离子的高选择性比率荧光探针，其线性范围为0.1~60μM，检出限为50 nm。我们将AIE分子作为有机配体构建CPN的方法，为AIE功能化材料的比率荧光响应铺平了道路，并将在化学传感中得到广泛的应用。
Coordination polymer nanoparticles (CPNs) formed by self-assembly of metal ions (or clusters) and organic bridging ligands through coordination bonds provide a unique platform for designing multifunctional nanoparticles. In this work, we report a ratiometric fluorescent probe for Zn2+ based on CPNs, which were prepared from AIE fluorophore HDBB molecules with metal ions. The CPNs are composed of HDBB molecules with Tb3+ (named Tb-HDBB-CPNs) which displayed a matrix coordination-induced emission peak at a wavelength of 590 nm, while CPNs formed by HDBB molecules and Zn2+ (named Zn-HDBB-CPNs) showed a distinctive fluorescent property with a blue emission peak wavelength of 470 nm. Based on the cation exchange process of Tb-HDBB-CPNs with Zn2+, a highly selective ratiometric fluorescent probe for the determination of Zn2+ in aqueous solution was developed with a linear range from 0.1 to 60 μM and a detection limit of 50 nM. Our approach using AIE molecules as organic ligands for the construction of CPNs paves a way toward AIE functionalized materials with ratiometric fluorescence response and will find wide applications in chemical sensing.