首先通过二溴六苯基丁二烯(HPB-Br)与4-乙烯基吡啶的Heck反应,获得含有两个吡啶基团的六苯基丁二烯(HPB-Py),再用碘甲烷甲基化得到含有双甲基吡啶碘盐的目标产物:六苯基-1,3-丁二烯衍生物(HPB-PyM)。作为HPB-PyM的前体化合物,HPB-Br和HPH_Py显示出优异的聚集诱导发光(AIE)特性。而HPPrPyM则呈现出聚集诱导猝灭(ACQ)特性,其固体呈橙红色荧光,发射波长λcm=605nm。当有汞离子存在的条件下,HPB-PyM基于AIE机制被点亮,并对Hg2+的检测具有响应速度快、灵敏度高和选择性强的特点,线性检测的最低限为4.153μmol/L,证明HPB-PyM是一种新型“点亮”汞离子探针。
A hexaphenyl-1,3-butadiene E)- ( ( ( 1E, 3 E)- 1, 2, 3,4-tetraphenylb diyl) ) bis (N-methylpyridinium) iodide derivative containing methylpyridinium moiety, 4,4'-((1E, 1 uta-1, 3-diene-1, 4-diyD bis (1, 4 phenylene) ) bis ( ethene-1, 2 (HPB-PyM), was firstly synthesized through Heck reaction of HPB-Br with 4-vinylpyridine and subsequent methylation with iodomethane. As the precursors of HPB-PyM, HPB-Br and HPB-Py showed excellent aggregation-induced emission characteristic. In contrast, HPB-PyM exhibited orange emission (λem = 605 rim) in the solid state with aggregationcaused quenching (ACQ) characteristic. Moreover, the fluorescence of HPB-PyM via AIE mechanism could be lightened and significantly enhanced by Hg2+ ions. As a "turn on" probe, HPB-PyM not only exhibited a rapid, sensitive, and selective response towards Hg2+ but also achieved linear and colorimetric detection for Hg2+ with a detection limit of 4. 153 μmol/L.