Citation: Shikun YAN, Yuhang WANG, Yanrui ZHAO, Jin ZHANG, Dexuan LIU, Jixiang HU, Guoming WANG. Construction and tunable photoluminescence and photochromism of two Dy(Ⅲ) complexes based on 9-anthracenecarboxylic acid[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(11): 2335-2342. doi: 10.11862/CJIC.20260074 shu

Construction and tunable photoluminescence and photochromism of two Dy(Ⅲ) complexes based on 9-anthracenecarboxylic acid

School of Chemistry and Chemical Engineering, Qingdao University, Qingdao, Shandong 266071, China

Corresponding author: Dexuan LIU, dexuan_liu@163.com Jixiang HU, hujixiang@qdu.edu.cn Guoming WANG, gmwang_pub@163.com
Received Date: 8 March 2026
Revised Date: 27 August 2026

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Utilizing the photoactive ligand 9-anthracenecarboxylic acid (9-HAc) as a structural building block, we report the solvothermal synthesis of two dinuclear Dy³⁺ complexes, [Dy₂(9-Ac)₆(DMA)₂] (1) and [Dy₂(9-Ac)₆(NMP)₂] (2) (DMA=N,N-dimethylacetamide, NMP=N-methylpyrrolidone). Single-crystal X-ray diffraction analysis reveals that both complexes contain dinuclear Dy₂ units, in which the Dy(Ⅲ) centers adopt eight-coordinated triangular dodecahedral geometries. Upon irradiation with a 300 W Xe lamp, the powder samples of 1 and 2 changed from pale pink and pale yellow to brown/dark brown, respectively, accompanied by pronounced quenching of ligand-centered emission. Time-dependent UV-Vis absorption spectra showed the gradual growth of a broad absorption band in the visible region. Electron paramagnetic resonance spectra displayed signals at g=2.002 after irradiation, confirming the formation of photogenerated radicals through a photoinduced electron-transfer process. IR spectra and powder X-ray diffraction patterns collected before and after irradiation indicate that the coordination frameworks are retained during the photochemical process. The photochromic and luminescence responses of these complexes were further used for inkless printing and information-encryption demonstrations.
- lanthanide complexes,
- 9-anthracenecarboxylic acid,
- photochromism,
- photogenerated radicals,
- electron transfer
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