PH regulated two Zn(II) viologen-derived photochromic functional complexes

By adjusting pH, two zero-dimensional (0D) Zn(II)-based functional complexes, namely, [Zn(CEbpy)(TPDC)(H2O)4]·3H2O (1) and (CEbpy)2·[Zn(H2O)6](TPDC)·3H2O (2) have been successfully constructed from thiophene-2,5-dicarboxylic acid (H2TPDC) and 1-carboxyethyl-4,4′-bipyridine (CEbpy). Both 1 and 2 disp...

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Bibliographic Details
Published in:Journal of molecular structure 2025-02, Vol.1322, p.140484, Article 140484
Main Authors: Fu, Yuying, Chen, Jiali, Liu, Qiaoyun, Shen, Shoujie, Liu, Jinjian
Format: Article
Language:English
Subjects:
Inkless and erasable printing
Luminescence
PH regulation
Photochromic property
Viologen
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Summary:By adjusting pH, two zero-dimensional (0D) Zn(II)-based functional complexes, namely, [Zn(CEbpy)(TPDC)(H2O)4]·3H2O (1) and (CEbpy)2·[Zn(H2O)6](TPDC)·3H2O (2) have been successfully constructed from thiophene-2,5-dicarboxylic acid (H2TPDC) and 1-carboxyethyl-4,4′-bipyridine (CEbpy). Both 1 and 2 display electron transfer (ET)-mediated photochromic behaviors with different photoresponsive rates. Furthermore, the solid-state photo-controlled luminescence of two compounds is also examined at ambient temperature. Appealingly, upon UV illumination, compound 1 possesses potential as an inkless and erasable printing medium. These results provide potential avenues for rational design and synthesis of functional materials that can be used in photochromic devices by modulating pH. •Two structurally distinct complexes based on CEbpy are synthesized by adjusting pH.•Despite having the same composition, both 1 and 2 exhibit differing photosensitivity.•Photo-modulated fluorescence and ink-free erasable printing abilities are discussed. [Display omitted]
ISSN:0022-2860
DOI:10.1016/j.molstruc.2024.140484