Issue 4, 2021

Encapsulating organic guest cations in anionic MOFs that exhibit multi-responsive photochromism and photocontrolled luminescence

Abstract

Photochromic materials with tunable luminescence have attracted considerable interest owing to their potential applications in various fields. However, making such materials with expected properties has always been a challenge. In this work, two metal–organic framework based host–guest compounds, [MV]·[Cd3(TPDC)4] (1) and [MV]·[Cd2(BTC)2(H2O)] (2) (MV·2NO3 = 1,1′-dimethyl-(4,4′-bipyridinium)dinitrate; H2TPDC = thiophene-2,5-dicarboxylic acid; H3BTC = 1,3,5-benzenetricarboxylic acid), have been synthesized by incorporating photoactive methyl viologen into an anionic metal–organic framework formed from cadmium cations and polycarboxylic acid ligands. Due to the presence of photoactive methyl viologen, both compounds exhibit electron-transfer photochromic behavior not only towards sunlight and indoor light irradiation but also towards X-rays. The photochromic response of compounds 1 and 2 originates from the carboxyl group to methyl viologen electron transfer. More interestingly, compounds 1 and 2 show good luminescence emission and their luminescence can be modulated upon sunlight irradiation.

Graphical abstract: Encapsulating organic guest cations in anionic MOFs that exhibit multi-responsive photochromism and photocontrolled luminescence

Supplementary files

Article information

Article type
Paper
Submitted
22 Oct 2020
Accepted
29 Nov 2020
First published
08 Dec 2020

CrystEngComm, 2021,23, 850-856

Encapsulating organic guest cations in anionic MOFs that exhibit multi-responsive photochromism and photocontrolled luminescence

J. Liu, S. Xia, D. Liu, J. Liu and F. Cheng, CrystEngComm, 2021, 23, 850 DOI: 10.1039/D0CE01545H

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