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General Chemistry ›› 2022, Vol. 8 ›› Issue (1-2): 220004-220004.DOI: 10.21127/yaoyigc20220004

• Reports • Previous Articles    

Coordination Assemblies Based on a Methylthio Carboxylic Ligand: Syntheses, Structures and Luminescent Properties

Jianming Li, Weiming Liao,* and Jun He   

  1. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
  • Received:2022-05-02 Accepted:2022-05-20 Online:2022-06-30 Published:2022-06-22
  • Contact: Email: wmliao@gdut.edu.cn (W. L.)

Abstract: Amphiphilic 4-(methylthio) benzoic acid (HMBA) combining soft methylthio and hard carboxylic groups was used to construct two isostructural coordination polymers of [Cu(MBA)]n (CP-1) and [Ag(MBA)]n (CP-2), and one complex of Cu2(MBA)4(CH3CN)2·CH3CN (3). This ditopic HMBA ligand realizes stable coordination of its carboxylic group with low-valent soft Cu+ ion (in-situ reduction from Cu2+) under the assistance of methylthio groups, forming CPs of CP-1 and CP-2. Meanwhile, based on the theory of hard and soft acid and base (HSAB), harder Cu2+ ions (in-situ oxidation from Cu+) only coordinate to carboxylic groups, affording a paddle-wheel dinuclear complex 3. These two CPs were also taken for luminescent researches in solid state. CP-1 exhibits single-peak emission at 540 nm while CP-2 emits both at 499 and 528 nm with green luminescence. The emissions of CP-1 and CP-2 are both attributed to 3MLCT (triplet metal-to-ligand charge transfer) excitation state.

Key words: coordination polymer, complex, luminescence, d10 metal, self-assembly

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