Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (1): 20210561.doi: 10.7503/cjcu20210561

• Article • Previous Articles     Next Articles

Synthesis and Electrochemical Biosensing Properties of Pyridine Dicarboxylic Acid Decorated Rare-earth-incorporatedTellurotungstates

JIANG Jun, GONG Tiantian, ZHANG Chengpeng, LIU Xiaoqian, ZHAO Junwei()   

  1. Henan Key Laboratory of Polyoxometalate Chemistry,College of Chemistry and Chemical Engineering,Henan University,Kaifeng 475004,China
  • Received:2021-08-08 Online:2022-01-10 Published:2021-09-28
  • Contact: ZHAO Junwei E-mail:zhaojunwei@henu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21871077);the Program for Innovation Teams in Science and Technology in Universities of Henan Province, China(20IRTSTHN004)

Abstract:

A family of rare 2,6-pyridinedicarboxylic acid decorated rare-earth(RE)-incorporated Keggin-type tellurotungstates(TTs)(PTEA)7H3K[RE2(B-α-TeW9O333W3O5(H2O)3(HDPA)]·22H2O[RE=Ce3+(1), Pr3+(2), Nd3+(3), Sm3+(4); H2DPA=2,6-pyridinedicarboxylic acid; PTEA=protonated triethanolamine] were synthesized by the one-step self-assembly strategy in NaAc aqueous solution via microwave heating method. The polyanion of isomorphic compounds 1—4 consists of three trivacant Keggin [B-α-TeW9O338- building blocks linked by a {RE2W3O5(H2O)3(HDPA)}13+ heterometallic cluster. In this heterometallic cluster, HDPA as quadridentate ligand coordinates with two RE ions(RE1 and RE2) to form planar tri-heterocycle structure, which is perpendicular to the planar constructed by W2, W2A and W16 centers. Additionally, compound 1 can combinate with carboxylic multi-walled carbon nanotube(CMWCNT) to produce the 1-CMWCNT composite, which was then used as electrode material to establish electrochemical biosensor for detecting sequence-specific DNA.

Key words: Polyoxometalate, Tellurotungstate, Electrochemical biosensing

CLC Number: 

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