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Issue 31, 2017
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Viologen-templated bromoplumbate: a new in situ synthetic method and energy gap engineering

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Abstract

Changing N-substituents to modify energy gaps is important for the diverse applications (photochromism, photocatalysis, etc.) of viologen-based compounds. In situ N-substitution using alcohols under solvothermal and acidic conditions is an effective and common synthetic method for viologen-templated metal halides. In this work, we found that replacing alcohols with alkenes could reduce the reaction temperature dramatically to room temperature. A new cis/trans-viologen-templated bromoplumbate with a novel 1-D chain structure built by edge-sharing planar [Pb3Br9]3− oligomers was successfully obtained. This bromoplumbate hybrid has a narrower energy gap compared with bulk PbBr2, which has been well explained by linear optical response spectra calculations and PDOS analysis.

Graphical abstract: Viologen-templated bromoplumbate: a new in situ synthetic method and energy gap engineering

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Publication details

The article was received on 14 May 2017, accepted on 27 Jun 2017 and first published on 28 Jun 2017


Article type: Communication
DOI: 10.1039/C7CE00919D
Citation: CrystEngComm, 2017,19, 4476-4479
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    Viologen-templated bromoplumbate: a new in situ synthetic method and energy gap engineering

    C. Sun, M. Wang, X. Zhang, N. Zhang, L. Cai and G. Guo, CrystEngComm, 2017, 19, 4476
    DOI: 10.1039/C7CE00919D

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