Zhang Man-Lian, Cao Xiao-Qin, Cao Chen, Zheng Teng-Fei, Xie Xin, Wen He-Rui, Liu Sui-Jun
School of Chemistry and Chemical Engineering, Jiangxi Province Key Laboratory of Functional Crystalline Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, PR China.
School of Chemistry and Chemical Engineering, Jiangxi Province Key Laboratory of Functional Crystalline Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2024 Dec 15;323:124898. doi: 10.1016/j.saa.2024.124898. Epub 2024 Jul 31.
Because ascorbic acid (AA) is one of the basic elements to maintain the normal physiological functions of human body, it is urgent to develop a material that can achieve efficient, rapid and in-situ detection for AA. A new fluorescence organic compound 4',4'''-(benzo[c][1,2,5]thiadiazole-4,7-diyl)bis([1,1'-biphenyl]-4-carboxylic acid) (HBTBC) based on benzothiadiazole group has been synthesized, which can detect Fe ions by fluorescence turn-off effect with a detection limit of 0.015 μM, as well as recognize linear amines by fluorescence turn-on effect. Moreover, a highly stable Tb(III) metal-organic framework has been solvothermally prepared with HBTBC, namely {[(CH)NH][Tb(BTBC)]∙solvents} (JXUST-39), which can selectively detect AA among biological fluids by fluorescence enhancement effect with a detection limit of 0.077 μM. In addition, the mechanism for JXUST-39 detecting AA is possibly the cooperative effect of absorbance-caused enhancement and charge transfer between JXUST-39 and AA. Moreover, LED lamp beads, fluorescent films and fluorescent detection test paper based on JXUST-39 were prepared to achieve portable detection via fluorescence enhancement effect.
由于抗坏血酸（AA）是维持人体正常生理功能的基本元素之一，因此开发一种能够对AA进行高效、快速、原位检测的材料迫在眉睫。基于苯并噻二唑基团合成了一种新型荧光有机化合物4',4'''-(苯并[c][1,2,5]噻二唑-4,7-二基)双([1,1'-联苯]-4-羧酸)（HBTBC），其可通过荧光猝灭效应检测Fe离子，检测限为0.015 μM，还可通过荧光增强效应识别线性胺。此外，利用HBTBC溶剂热制备了一种高度稳定的Tb(III)金属有机框架，即{[(CH)NH][Tb(BTBC)]∙溶剂}（JXUST-39），其可通过荧光增强效应在生物流体中选择性检测AA，检测限为0.077 μM。此外，JXUST-39检测AA的机制可能是吸光度引起的增强与JXUST-39和AA之间电荷转移的协同作用。此外，制备了基于JXUST-39的LED灯珠、荧光薄膜和荧光检测试纸，以通过荧光增强效应实现便携式检测。
