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Issue 17, 2019
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Photochromism of supramolecular assemblies based on benzenecarboxylate donors and viologen acceptors

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Abstract

Four different host–guest supramolecular assemblies of 1,2,4,5-benzenetetracarboxylic acid (H4BTEC) and viologens have been prepared, [(PV)0.5(H4BTEC)0.5]·NO3 (1), [(PV)(H2BTEC)]·H2O (2), (H3O)(PV)0.5(H2BTEC) (3), and [(AV)0.5(H4BTEC)0.5(H2BTEC)0.5]·H2O (4), (PV2+ = 1,1′-bis(propyl)-4,4′-bipyridinium dication; AV2+ = 1,1′-bis(amyl)-4,4′-bipyridinium dication). The electron-donating acid moieties acting as the host form supramolecular assemblies with electron-deficient viologens as the guest, which are connected by non-covalent interactions to make the donor–acceptor (D–A) system. Compounds 2–4 all exhibit electron-transfer (ET) photochromic behaviors, while compound 1 has no observed photochromism. The results show that the balance between intermolecular electron transfer and consequent photochromism is due to the rational modulation of electron acceptors and donors.

Graphical abstract: Photochromism of supramolecular assemblies based on benzenecarboxylate donors and viologen acceptors

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Publication details

The article was received on 14 Feb 2019, accepted on 27 Mar 2019 and first published on 08 Apr 2019


Article type: Paper
DOI: 10.1039/C9NJ00796B
Citation: New J. Chem., 2019,43, 6607-6614

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    Photochromism of supramolecular assemblies based on benzenecarboxylate donors and viologen acceptors

    J. Liu, J. Li and G. Zhao, New J. Chem., 2019, 43, 6607
    DOI: 10.1039/C9NJ00796B

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