Citation: Hongjie SHEN, Haozhe MIAO, Yuhe YANG, Yinghua LI, Deguang HUANG, Xiaofeng ZHANG. Synthesis, crystal structure, and fluorescence properties of two Cu(Ⅰ) complexes based on pyridyl ligand[J]. Chinese Journal of Inorganic Chemistry, ;2025, 41(5): 855-863. doi: 10.11862/CJIC.20250009 shu

Synthesis, crystal structure, and fluorescence properties of two Cu(Ⅰ) complexes based on pyridyl ligand

Hongjie SHEN ^{1, 2, 3} ,
Haozhe MIAO ^{1, 2, 3} ,
Yuhe YANG ^{1, 2, 3} ,
Yinghua LI ² ,
Deguang HUANG ² ,
Xiaofeng ZHANG ^2,,

1.
College of Chemistry, Fuzhou University, Fuzhou 350108, China
2.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
3.
Fujian College, University of Chinese Academy of Sciences, Fuzhou 350002, China

Corresponding author: Xiaofeng ZHANG, zhangxiaofeng@fjirsm.ac.cn
Received Date: 7 January 2025
Revised Date: 25 March 2025

Figures(8)

Two novel pyridyl ligands, 4-[4-(9, 9-dimethyl-9H-fluoren-2-yl)phenyl]pyridine (dmfpp) and 9-[4-(pyridin-4-yl)phenyl]-9H-carbazole (ppcbz), were successfully synthesized and structurally characterized by ¹H NMR and ¹³C NMR. Two dinuclear Cu(Ⅰ) complexes, [Cu₂(dmfpp)₂(PPh₃)₂I₂]·2CH₂Cl₂ (1) and [Cu₂(ppcbz)₂(PPh₃)₂I₂] (2), have been synthesized by reacting two pyridyl ligands with [Cu₄I₄(PPh₃)₄], in a stoichiometric ratio. The complexes have been characterized by elemental analysis, fluorescence spectrum, thermogravimetric analysis (TGA), and single-crystal and powder X-ray diffraction. Complex 1 crystallizes in monoclinic system, space group P2₁/c with a=1.853 43(3) nm, b=1.266 34(2) nm, c=1.833 48(3) nm, β=106.319 3(18)°, V=4.082 24(12) nm³. Complex 2 crystallizes in mono-clinic system, space group $P \overline{1}$ with a=0.941 07(4) nm, b=1.128 86(4) nm, c=1.697 77(6) nm, α=87.775(3)°, β=79.622(3)°, γ=71.418(3)°, V=1.681 26(11) nm³. Both complexes feature a [Cu₂I₂] core with tetrahedrally coordinated Cu(Ⅰ) centers. TGA results demonstrated their good thermal stability, with structural decomposition initiating above 220 ℃. Fluorescence studies under 370 nm excitation revealed green emission for both complexes. Complex 2 exhibited an outstanding photoluminescence quantum yield (PLQY) of 0.79, significantly higher than that of complex 1 (PLQY: 0.02).
- Cu(Ⅰ) complex,
- pyridyl ligands,
- crystal structure,
- luminescence
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