Three luminescent derivatives were synthesized based on improving the synthetic method, including 1,1,2,2-tetrakis(4-bromophenyl)ethylene (1), 4,4′,4″,4′′′-(ethylene-1,1,2,2-tetrayl)tetrabenzoic acid (2), and 4′,4′′′,4′′′′′,4′′′′′′′-(ethylene-1,1,2,2-tetrayl)tetrakis([1,1′-biphenyl]-4-carboxylic acid) (3). They were characterized by elemental analysis, IR spectra, and ¹H NMR. Moreover, the specific structure of the compound 1 is determined by single crystal diffraction. We detected the fluorescence responses of the compounds 2 and 3 in different metal ion and nitro compound solutions. It was found that the fluorescence effects of the compounds 2 and 3 for Fe³⁺ and trinitro phenol (TNP) were so strongest that the fluorescence intensity of the compounds being completely annihilated. In addition, we also studied the fluorescence lifetime and the quantum yield of the compounds 2 and 3, and explained the fluorescence quenching mechanism.

中文翻译：

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基于四苯乙烯衍生物的金属和硝基芳香化合物的荧光检测

在改进合成方法的基础上，合成了三种发光衍生物，包括1,1,2,2-四（4-溴苯基）乙烯（1），4,4'，4''，4''-（乙烯-1， 1,2,2-四基）四苯甲酸（2）和4'，4'''，4'''''，4'''''''-（乙烯-1,1,2,2-四[基]四[（1,1'-联苯] -4-羧酸）（3）。通过元素分析，红外光谱和¹ H NMR对它们进行了表征。此外，化合物1的具体结构通过单晶衍射确定。我们在不同的金属离子和硝基化合物溶液中检测到化合物2和3的荧光响应。发现化合物的荧光作用Fe ³⁺和三硝基苯酚（TNP）的2和3最强，因此该化合物的荧光强度被完全消除。此外，我们还研究了化合物2和3的荧光寿命和量子产率，并解释了荧光猝灭机理。