Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 27, Issue 29, Pages 7842-7846Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202100696
Keywords
donor-acceptor systems; electron transfer; photochromism; photoresponsive properties; radicals
Categories
Funding
- National Natural Science Foundation of China [21601099, 21571111, 22071126]
- Key research and development project of Shandong Province [2019GGX102006]
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This study successfully pre-designed crystalline HPMs with multiple photoresponsive properties by utilizing electron-transfer and crystal engineering strategies, providing a new method for constructing smart materials with multiple photoresponsive characteristics.
As promising photoresponsive materials and potential smart materials, hybrid photochromic materials (HPMs), especially for crystalline HPMs (CHPMs), have been broadly explored for their potential in inheriting the merits of each constituents, and intriguing photomodulated functionality. Hitherto, the photoresponsive functionality in explored CHPMs mainly concentrate on dyad combination. By contrast, triple or quadruple photoresponsive properties are very rare because of the limited compatibility of multiple photoresponsive functionality in a single system. In this work, the electron-transfer (ET) and crystal engineering strategies were utilized to predesign CHPMs with multiple photoresponsive properties via the collaboration of paramagnetic metal ion (Dy3+), electron-donor (ED) ligand (benzene-1,2,3-tricarboxylic acid, H(3)BTA) and electron-acceptor (EA) ligand (1,10-phenanthroline, phen). The resulting complex [Dy(BTA)(phen)(2)].2H(2)O (1) shows hybrid chain with the intrachain Dy3+ ions bridged and chelated by tricarboxylate and phen ligands, respectively. After photostimuli, the ET between tricarboxylate and phen results in photogenerated radicals and the resultant quadruple photoresponsive properties. Considering the abundant resources of paramagnetic metal ions, ED- and EA-ligands, this work provides a general method to construct CHPMs with multiple photoresponsive performances via the collaboration of each unit under the guidance of ET and crystal engineering strategies.
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