Citation: Yinxia SUN, Liping LIU, Xue BAI, Yu SUN, Wanhong SUN, Zhepeng DENG, Jianghai CHEN, Jianjun WANG, Li XU, Shuzhen ZHANG. Synthesis and crystal structures of Co(Ⅱ)/Cu(Ⅱ) coordination polymers based on solvent and ligand concentration regulation strategy[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(2): 340-354. doi: 10.11862/CJIC.20250226 shu

Synthesis and crystal structures of Co(Ⅱ)/Cu(Ⅱ) coordination polymers based on solvent and ligand concentration regulation strategy

Yinxia SUN ^1,, ,
Liping LIU ¹ ,
Xue BAI ¹ ,
Yu SUN ² ,
Wanhong SUN ² ,
Zhepeng DENG ^1,, ,
Jianghai CHEN ¹ ,
Jianjun WANG ³ ,
Li XU ¹ ,
Shuzhen ZHANG ¹

1.
School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
2.
Experimental Teaching Department of Northwest Minzu University, Lanzhou 730030, China
3.
Gansu Provincial Library, Lanzhou 730030, China

Corresponding author: Yinxia SUN, sun_yinxia@163.com Zhepeng DENG, dengzp516@163.com
Received Date: 9 July 2025
Revised Date: 25 September 2025

Figures(10)

Four distinct coordination polymers (CPs) were successfully synthesized by altering solvent types and adjusting ligand concentrations, and their crystal structures were investigated. [Co(L)(FDCA)(H₂O)₂]·0.5H₂O (1) was synthesized as a 2D structure using Co(Ⅱ) as the metal source, methanol-water (4∶6, V/V) as the solvent, and specific concentrations of 2, 5-furandicarboxylic acid (H₂FDCA) and 1, 3, 5-triimidazole benzene (L). Adjusting to pure water and lowering the concentration of L yielded the 1D chain structure of [Co(HL)₂(H₂O)₂](FDCA)₂·6H₂O (2). Using Cu(Ⅱ) as the metal source, methanol/water (9∶1, V/V) as the solvent, and specific concentrations of L and H₂FDCA, the 1D chain structure of [Cu(L)(FDCA)(H₂O)]·2H₂O (3) was synthesized. Upon increasing the concentrations of L and H₂FDCA, and switching the solvent to pure water, the 1D chain structure of [Cu(HL)₂(H₂O)₂](FDCA)₂·6H₂O (4) was obtained. This shows that changing the solvent and ligand concentrations can affect the structural changes of CPs. In addition, the solid-state photoluminescence of CPs 1-4 at room temperature was studied, and their morphological changes were observed via scanning electron microscopy. Density functional theory calculations revealed that the negative charge concentrates on the O and N atoms of the ligand, facilitating ligand-metal ion coordination.
- Co(Ⅱ)/Cu(Ⅱ),
- coordination polymer,
- crystal structure,
- solvent system,
- ligand concentration,
- regulation strategy
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沈阳化工大学材料科学与工程学院沈阳 110142