高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (1): 20210561.doi: 10.7503/cjcu20210561

• 研究论文 • 上一篇    下一篇

吡啶二羧酸修饰的稀土嵌入碲钨酸盐的合成及电化学生物识别性质

蒋君,宫田田,张成鹏,刘晓倩,赵俊伟   

  1. 河南大学化学化工学院, 河南省多酸化学重点实验室, 开封 475004
  • 收稿日期:2021-08-08 出版日期:2022-01-10 发布日期:2021-09-28
  • 基金资助:
    国家自然科学基金(21871077);河南省高校科技创新团队支持计划(20IRTSTHN004)

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)

摘要:

在乙酸钠水溶液中, 采用微波加热一步自组装策略合成了一系列罕见的2,6-吡啶二羧酸修饰的稀土嵌入Keggin型碲钨酸盐(PTEA)7H3K[RE2(B-α-TeW9O33)3W3O5(H2O)3(HDPA)]·22H2O[RE=Ce3+(1), Pr3+(2), Nd3+(3), Sm3+(4); H2DPA=2,6-吡啶二羧酸; PTEA=质子化的三乙醇胺]. 化合物1~4的聚阴离子由3个三缺位Keggin型 [B-α-TeW9O33]8-构筑块通过1个{RE2W3O5(H2O)3(HDPA)}13+异金属簇连接而成. 该异金属簇中, 2,6-吡啶二羧酸作为四齿配体与2个稀土离子(RE1和RE2)配位形成平面三杂环结构, 且RE1和RE2所在平面与W2, W2A, W16形成的平面互相垂直. 此外, 化合物1可与羧基化多壁碳纳米管(CMWCNT)复合形成1-CMWCNT复合材料. 该复合材料可以作为电极材料构建电化学生物传感器, 用于检测特定的DNA序列.

关键词: 多金属氧酸盐, 碲钨酸盐, 电化学生物识别

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

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