Wang Ke, Zheng Teng-Fei, Chen Jing-Lin, Wen He-Rui, Liu Sui-Jun, Hu Tong-Liang
School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou341000, Jiangxi Province, P. R. China.
School of Materials Science and Engineering, Nankai University, Tianjin300350, P. R. China.
Inorg Chem. 2022 Oct 10;61(40):16177-16184. doi: 10.1021/acs.inorgchem.2c02763. Epub 2022 Sep 23.
A new polydentate tetracarboxylic acid with a benzothiadiazole unit (4',4'''-(benzo[][1,2,5]thiadiazole-4,7-diyl)bis([1,1'-biphenyl]-3,5-dicarboxylic acid), HBTDBA) has been used to prepare a pH-stable three-dimensional Tb-based metal-organic framework (MOF) with the formula {[(CH)NH][Tb(BTDBA)(lac)(HO)]·solvents} (Hlac = lactic acid, ). exhibits a new (4,4,12)-connected topology based on tetranuclear [Tb] clusters. can remain stable when soaked in water for at least 1 week and in aqueous solutions with various pH values (2-12) for 24 h. Fluorescence study indicates can be employed as a rare turn-on and blue-shift MOF sensor toward benzaldehyde (BZ) and salicylaldehyde (SA). To date, represents the first Tb-based turn-on MOF sensor toward salicylaldehyde in aqueous solution, and the fluorescence enhancement and naked-eye detection of BZ have been rarely reported. In addition, based fluorescent test papers, light-emitting diode lamp beads, and portable composite films were developed to realize naked-eye detection of BZ and SA, which has great potential in practical applications.
一种带有苯并噻二唑单元的新型多齿四羧酸（4',4'''-(苯并[][1,2,5]噻二唑-4,7-二基)双([1,1'-联苯]-3,5-二羧酸)，HBTDBA）已被用于制备一种pH稳定的三维Tb基金属有机框架（MOF），其化学式为{[(CH)NH][Tb(BTDBA)(lac)(HO)]·溶剂}（Hlac = 乳酸）。该框架基于四核[Tb]簇展现出一种新的(4,4,12)-连接拓扑结构。当浸泡在水中至少1周以及在各种pH值（2 - 12）的水溶液中浸泡24小时时，它能保持稳定。荧光研究表明，该框架可作为一种对苯甲醛（BZ）和水杨醛（SA）罕见的开启型且蓝移的MOF传感器。迄今为止，它是首例在水溶液中对水杨醛的基于Tb的开启型MOF传感器，并且苯甲醛的荧光增强和肉眼检测鲜有报道。此外，还开发了基于该框架的荧光试纸、发光二极管灯珠和便携式复合膜以实现对苯甲醛和水杨醛的肉眼检测，这在实际应用中具有巨大潜力。
