Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1251, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.molstruc.2021.132011
Keywords
Photochromism; MOFs; Luminescence; Naphthalene diimide; Electron transfer
Categories
Funding
- National Natural Science Foundation of China [21961030]
- Yunnan Province Thousand Youth Talents Plan
- Scientific and Technological Innovation Team for Green Catalysis and Energy Material in Yunnan Institutions of Higher Learning
- Program of Innovative Research Team (in science and technology) in University of Yunnan Province
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Metal-organic frameworks containing photoactive ligands or components are ideal platforms for building photochromic complexes. In this study, a metal-organic framework based on a naphthalene diimide ligand and Lindqvist-type W6O192- polyanions was synthesized. The framework exhibits a cationic two-dimensional grid coordination network and shows fast responsive reversible photochromism and tunable luminescence.
Metal-organic frameworks that contain photoactive organic ligands or photoactive inorganic components are an emerging class of multifunctional hybrid materials that in recent years has gradually become an ideal platform for building photochromic complexes. In this paper, a metal-organic framework based on naphthalene diimide (NDI) ligand with Lindqvist-type W6O192- polyanions, [Ce-2(BINDI) (DMF)(8)]center dot[W6O19] (1), (H4BINDI = N, N'-bis(5-isophthalic acid)-1,4,5,8-naphthalene diimide) was synthesized and systematically characterized. It displays a cationic two-dimensional grid coordination network, featuring anion-pi interactions between W6O192- and expanded pi-electron deficient naphthalene diimide (NDI) moieties. Moreover, because of the presence of electron-deficient NDI moieties and photoactive W6O192-, this complex exhibits fast responsive reversible photochromism and photoresponsive tunable luminescence. UV-Vis, IR, PXRD, EPR, and XPS spectral studies indicate that the obviously photochromic phenomenon of complex 1 is derived from photoinduced electron-transfer form NDI radicals and W5+ species. (C) 2021 Elsevier B.V. All rights reserved.
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