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Issue 13, 2017
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Di-pyridyl organic cation directed hybrid cuprous halogenides: syntheses, crystal structures and photochromism and photocatalysis

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Abstract

By using 1,3-di(4-pyridyl)-propane (dpp) as templates or structure-directing agents (SDAs), a series of hybrid cuprous halogenides, namely, [H2dpp]2[Cu4I8]·H2O (1), [H2dpp][Cu2I4] (2), [H2dpp]2Cu11I15 (3) and [H2dpp]2Cu11Br15 (4), have been solvothermally prepared and structurally characterized. Despite the similar chemical compositions, compound 1 features a zero-dimensional (0D) [Cu4I8]4− unit and compound 2 contains one-dimensional (1D) [Cu2I4]2− chains, which are both separated by [H2dpp]2+ organic cations. Compounds 3–4 contain two-dimensional (2D) microporous [Cu11X15]4− (X = I, Br) layers composed of the [Cu9X17] unit interconnected by [CuX4] tetrahedra. The UV-vis diffuse-reflectance measurements reveal that the compounds 3–4 exhibit semiconducting behaviors with narrow band gaps of 1.48 and 2.21 eV, respectively, which lead to efficient photocatalytic degradation activities over an organic pollutant under visible light irradiation. The possible photocatalytic mechanism is also proposed based on experimental and theoretical studies. Furthermore, compound 1 shows interesting photochromism behavior maybe owing to the photo-induced intermolecular charge transfer.

Graphical abstract: Di-pyridyl organic cation directed hybrid cuprous halogenides: syntheses, crystal structures and photochromism and photocatalysis

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Publication details

The article was received on 21 Jan 2017, accepted on 17 Feb 2017 and first published on 20 Feb 2017


Article type: Paper
DOI: 10.1039/C7DT00262A
Citation: Dalton Trans., 2017,46, 4209-4217
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    Di-pyridyl organic cation directed hybrid cuprous halogenides: syntheses, crystal structures and photochromism and photocatalysis

    X. Lei, C. Yue, S. Wang, H. Gao, W. Wang, N. Wang and Y. Yin, Dalton Trans., 2017, 46, 4209
    DOI: 10.1039/C7DT00262A

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