期刊
INORGANIC CHEMISTRY
卷 60, 期 18, 页码 14286-14293出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.1c01819
关键词
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资金
- National Natural Science Foundation of China [22001138, 21701170, 21565019]
- Jiangxi Provincial Natural Science Foundation [20202ACBL213005]
- Science and Technology Research Project of Jiangxi Provincial Department of Education [GJJ181096]
The study focused on obtaining lanthanide-based crystalline materials with significant photochromism and reactive organic radicals by combining water-soluble naphthalenediimide derivative with lanthanide nitrate solution. Photoswitchable near-infrared fluorescence was achieved in crystalline complex 1, with the structures of these materials studied to clarify the charge-transfer process. Multiple-interaction-assisted self-assembly, radical-doped nature, and the photochromic mechanism were thoroughly investigated through various techniques.
Stimuli-responsive functional materials, especially the light stimulation color change and tunable fluorescent materials, have received considerable attention because of their broad applications in smart materials. Herein, a series of lanthanide-based [Ln = Nd(III) (1), Sm(III) (2), Eu(III) (3), Gd(III) (4), Tb(III) (5), Yb(III) (6), and Lu(III) (7)] crystalline complexes were attained by simply adding the aqueous lanthanide nitrate solution to the water-soluble naphthalenediimide derivative. The obtained lanthanide-based crystalline materials not only show significant photochromism but also possess reactive organic radicals under ambient conditions. Intriguingly, photoswitchable near-infrared (NIR) fluorescence was realized in the crystalline complex 1. The structures of these crystalline materials were systematically studied to clarify the weak interaction-assisted charge-transfer process. The underlying multiple-interactionassisted supramolecular self-assembly, the radical-doped nature, and the corresponding photochromic mechanism were thoroughly unearthed by single-crystal X-ray diffraction, in situ solid-state UV-vis diffuse reflectance, and electron paramagnetic resonance spectrometric analysis.
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