Two novel zinc-based MOFs as luminescence sensors to detect phenylglyoxylic acid. Issue 42 (11th October 2022)

• Record Type: Journal Article
• Authors: Song, Dongxue; Ji, Xiaoxi; Li, Yong; Wu, Shuangyan; Zhang, Ying; Wang, Xiaofeng; Sun, Yaguang; Gao, Enjun; Zhu, Mingchang
• Is Part Of: Dalton transactions. Volume 51:Issue 42(2022)
• Page Start: 16266
• Page End: 16273
• Publication Date: 2022-10-11
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2dt02406c
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Two novel water-stable zinc-based MOFs exhibit specific recognition for PGA, and are fluorescent sensors with high sensitivity, high selectivity, good recovery and good anti-interference ability. In addition, the naked eye can identify PGA at different concentrations. Abstract : Automobile exhaust gases, plastic pollutants, smoking, and other harmful substances can cause serious harm to human beings and the environment. Styrene, as a common airborne toxin, enters the human body through breathing or the skin and is discharged in the form of phenylglyoxylic acid (PGA). Therefore, specific, sensitive and trace detection of PGA is particularly important. Here, two zinc-based metal–organic frameworks {[Zn2 L1 (DMF)2 H2 O](DMF)2 H2 O} n, {[Zn4 (L2 )2 (DMF)2 (H2 O)3 ](DMF)8 } n (L1 = 2, 5-bis((3-carboxylphenyl)amino)terephthalic acid, L2 = 2, 5-bis((4-carboxyphenyl)amino)terephthalic acid) have been reported as 1 and 2, respectively. Both 1 and 2 present 3D structures, which can both be simplified as 4, 4, 4-c net topology. It is worth mentioning that 2 has two different kinds of Zn SBUs as connecting nodes in the structure. Besides, compared with the other materials for the detection of PGA, 1 and 2 exhibit relatively low detection limits (LODs), both in water and in urine (where the LODs for 1 in water and urine were 0.33 μM and 0.43 μM in the range of 0–0.39 mM, and those for 2 were 0.28 μM and 0.49 μM in the range of 0–0.59 mM, respectively). In addition, the sensors have excellent anti-interference ability, high stability, rapid response, and can easily distinguish between different concentrations of PGA with the naked eye. The developed paper probes were suitable for practical sensing applications for portable detection of PGA in urine.