Cd(II)/Mn(II)/Co(II)/Ni(II)/Zn(II) Coordination Polymers Built from Dicarboxylic Acid/Tetracarboxylic Acid Ligands: Their Structural Diversity and Fluorescence Properties

Lu Liu; Jian-Min Li; Meng-Di Zhang; Hui-Jie Wang; Ying Li; Zhen-Bei Zhang; Zi-Fang Zhao; Yu Xi; Yuan-Yuan Huang; Jie Xu; Bo Zhang; Jun Chen; Cheng-Xing Cui

doi:10.3390/polym15071803

Cd(II)/Mn(II)/Co(II)/Ni(II)/Zn(II) Coordination Polymers Built from Dicarboxylic Acid/Tetracarboxylic Acid Ligands: Their Structural Diversity and Fluorescence Properties

Polymers (Basel). 2023 Apr 6;15(7):1803. doi: 10.3390/polym15071803.

Authors

Lu Liu¹, Jian-Min Li², Meng-Di Zhang¹, Hui-Jie Wang¹, Ying Li¹, Zhen-Bei Zhang¹, Zi-Fang Zhao¹, Yu Xi¹, Yuan-Yuan Huang¹, Jie Xu¹, Bo Zhang¹, Jun Chen¹, Cheng-Xing Cui¹

Affiliations

¹ School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, China.
² School of Resources and Environment, Henan Institute of Science and Technology, Xinxiang 453003, China.

Abstract

Six Cd(II)/Mn(II)/Co(II)/Ni(II)/Zn(II) coordination complexes are formulated as [Cd₂(X^2-)₂(μ₃-O)_2/3]_n (1), [Mn₂(X^2-)₂(μ₃-O)_2/3]_n (2), {[Co_1.5(Y^4-)_0.5(4,4'-bpy)_1.5(OH^-)]·2H₂O}_n (3), {[Ni(X^2-)(4,4'-bpy)(H₂O)₂]·4H₂O}_n (4), [Zn(m-bdc^2-)(bebiyh)]_n (5), and [Cd(5-tbia^2-)(bebiyh)]_n (6) (H₂X = 3,3'-(2,3,5,6-tetramethyl-1,4-phenylene) dipropionic acid. H₄Y = 2,2'-(2,3,5,6-tetramethyl-1,4-phenylene)bis(methylene) dimalonic acid, bebiyh = 1,6-bis(2-ethyl-1H-benzo[d]imidazol-1-yl)hexane, m-H₂bdc = 1,3-benzenedicarboxylic acid, and 5-H₂tbia = 5-(tert-butyl)isophthalic acid) were obtained by hydrothermal reactions and structurally characterized. Complexes 1 and 2 have a 6-connected 3D architecture and with several point symbols of (3⁶·4⁶·5³). Complex 3 features a 5-connected 3D net structure with a point symbol of (5·6⁹). Complex 4 possesses a 4-connected 2D net with a vertex symbol of (4⁴·6²). Complex 5 is a 3-connected 2D network with a point symbol of (6³). Complex 6 is a (3,3)-connected 2D network with a point symbol of (6³)₂. In addition, complexes 1 and 4 present good photoluminescence behaviors. The electronic structures of 1 and 4 were investigated with the density functional theory (DFT) method to understand the photoluminescence behaviors.

Keywords: coordination complex; density functional theory; fluorescence properties.

Grants and funding

This research was funded by the Key Scientific Research Project of Colleges and Universities in Henan Province (No. 23A150039), the Key Scientific and Technological Project of Henan Province (No. 222102320259, 222102240001, 212102210304, and 222102310117), the Henan University of Science and Technology innovation and entrepreneurship training program for college students (No. 2022CX095), and the Training Plan for University’s Young Backbone Teachers of Henan Province (No. 2019GGJS170).