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説明:

Electron-deficient viologens are widely used as ligands or structure-directing agents (SDAs) to synthesize crystalline X-ray induced photochromic materials. Here, a new rational strategy of anion-directed folding a flexible cation (H2imb)2+ ((H2imb)2+ = di-protonated 2,3-bis(imidazolin2-yl)-2,3-dimethylbutane) has been developed. Electron-donating Cl−and (ZnCl4)2− are used to direct folding a flexible electron-deficient (H2imb)2+ cation. Three complexes (H2imb)(NO3)2 (1), (H2imb)Cl2·H2O (2), and (H2imb)ZnCl4 (3) have been synthesized in which (H2imb)2+ crystallize in an anti-conformation, 88.8°-gauche, and 51.8°-gauche, respectively. In contrary to X-ray silent complex 1, X-ray induced photochromism has been achieved in both complex 2 and 3. An intermolecular charge-transfer mechanism has been elucidated and the anion directed
folding of (H2imb)2+ has been validated to be critical to yield colored long-lived charge-separated states.

権利情報:

• In Copyright
  

キーワード: Supramolecular, Photochromic, X-ray induced, Anion-directed folding, Electron-deficient viologens

刊行年月日: 2023-09-05

出版者: Elsevier BV

掲載誌:

• Chinese Chemical Letters (ISSN: 10018417) vol. 35 issue. 8 109052

研究助成金:

• Youth Innovation Promotion Association of the Chinese Academy of Sciences 2021302
• Natural Science Foundation of Xiamen Municipality 3502Z20206080
• Recruitment Program of Global Experts
• Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China 2021ZR110
• National Natural Science Foundation of China 92261109
• Natural Science Foundation of Fujian Province 2020J05080
• China Postdoctoral Science Foundation 2023M733496

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4506

公開URL: https://doi.org/10.1016/j.cclet.2023.109052

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更新時刻: 2024-05-13 16:30:21 +0900

MDRでの公開時刻: 2024-05-13 16:30:21 +0900