Electrochemical sensing properties of cobalt-based coordination polymers for trace L-tryptophan in milk

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-03-26 DOI:10.1039/d5dt00116a

Yichen Liu, Zhongqin Zhao, Rui Xin, Duqingcuo Li, Xiuyan Dong, Aparna Kushwaha, Mohammad Khalid Parvez, Mohammed S. Al-Dosari, Abhinav Kumar, Yong Huang

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引用次数: 0

Abstract

Two Co(II)-based coordination polymers (CPs), {[Co₃(L)₂(H₂O)₈]·6H₂O}_n (1) and [Co(L)(H₂O)(4,4′-dipy)_0.5]_n (2) (H₃L = 2-(4-carboxyphenyl)-1H-imidazole-4,5-dicarboxylic acid and 4,4′-dipy = 4,4′-bipyridine), were synthesized via a hydrothermal method and characterized using single crystal X-ray diffraction (SC-XRD), powder X-ray diffraction (PXRD), and electrochemical methods. We obtained sensors 1@GCE and 2@GCE by modifying a glassy carbon electrode (GCE), and their electrochemical sensing behavior for L-tryptophan (L-Try) was investigated. The linear range for L-Try sensing was 1–10 μmol, and the limit of detection (LOD) was 0.039 μmol and 0.4 μmol, for 1 and 2, respectively. It was verified by theoretical calculation that their superior electrochemical sensing performance for L-Try was due to the influence of the structure of the CPs. The CP with more active sites and larger void area could interact with L-Try better, and thus, 1 exhibited an excellent sensing effect. In addition, as 1 and 2 successfully detected L-Try in the analysis of milk samples, these materials are expected to serve as high-performance electrochemical sensors for the detection of L-Try.

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.