A new class of crystalline X-ray induced photochromic materials assembled from anion-directed folding of a flexible cation

Hong-Jin Liao ¹Zhu Zhuo ²Qing Li ³Yoshihito Shiota ⁴Jonathan P.Hill ⁵Katsuhiko Ariga ⁵Zi-Xiu Lu ³Lu-Yao Liu ³Zi-Ang Nan ³Wei Wang ³You-Gui Huang²

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作者信息

1. CAS Key Laboratory of Design and Assembly of Functional Nanostructures,and Fujian Provincial Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China;Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials,Xiamen Institute of Rare Earth Materials,Haixi Institutes,Chinese Academy of Sciences,Xiamen 361021,China
2. CAS Key Laboratory of Design and Assembly of Functional Nanostructures,and Fujian Provincial Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China;Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials,Xiamen Institute of Rare Earth Materials,Haixi Institutes,Chinese Academy of Sciences,Xiamen 361021,China;Fujian Science & T
3. CAS Key Laboratory of Design and Assembly of Functional Nanostructures,and Fujian Provincial Key Laboratory of Nanomaterials,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials,Xiamen Institute of Rare Earth Materials,Haixi Institutes,Chinese Academy of Sciences,Xiamen 361021,China
4. Institute for Materials Chemistry and Engineering,Kyushu University,Fukuoka 819-0395,Japan
5. World Premier International(WPI)Center for Materials Nanoarchitectonics(MANA),National Institute for Materials Science(NIMS),Ibaraki 305-0044,Japan
折叠

Abstract

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 fold-ing a flexible cation(H2imb)2+((H2imb)2+=di-protonated 2,3-bis(imidazolin-2-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.

Key words

Supramolecular/Photochromic/X-ray induced/Anion-directed folding/Electron-deficient viologens

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出版年

2024

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCDCSCD

影响因子：0.771

ISSN：1001-8417

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