1. A new photochromic Mg(II)‐viologen complex with photoswitchable emission and its application in ink‐free printing.
- Author
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Liu, Peng, Liu, Teng, Shen, Xianfu, and Liu, Jian‐Jun
- Subjects
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OPTICAL switches , *PHOTOCHROMIC materials , *OPTICAL devices , *CHEMICAL formulas , *VISIBLE spectra , *IRRADIATION - Abstract
Stimulus‐responsive molecular photochromic materials have potential applications in sensor, information storage, and optical switch devices since they undergo reversible color changes upon stimulus from external light. In this work, a viologen‐derived Mg(II) coordination complex with molecular formula [Mg(dpbp)2(H2O)4] (1) has been synthesized from 1‐(3,5‐dicarboxyphenyl)‐4,4′‐bipyridinium chloride (H2dpbp⋅Cl) under solvothermal conditions. Complex 1 has a three‐dimensional viologen‐based hydrogen bond network showing reversible photochromism through radical formation under ultraviolet‐visible light irradiation. Simultaneously, the emission of complex 1 can be reversibly modulated by ultraviolet‐visible light irradiation. Importantly, due to its reversible photochromic properties, practical fading time, and high stability, complex 1 can be used as an ink‐free and erasable printing medium by applying ultraviolet visible light irradiation with a mask. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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