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Issue 6, 2014
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Phosphorescent nematic hydrogels and chromonic mesophases driven by intra- and intermolecular interactions of bridged dinuclear cyclometalated platinum(II) complexes

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Abstract

A new class of dinuclear cyclometalated platinum(II) complexes with [PtII(C^N^N)CNR]+ (HC^N^N = 6-phenyl-2,2′-bipyridyl, CNR = 2,6-dimethylphenyl isocyanide) motifs covalently connected by oligo(oxyethylene) chains form luminescent lyotropic chromonic liquid crystals or hydrogels in aqueous dispersions with intra- and intermolecular Pt⋯Pt and π–π interactions as the driving force. Their solution behaviour is modulated by the length of the oligo(oxyethylene) chain connecting the two cyclometalated platinum(II) motifs. One of the dinuclear Pt(II) complexes with a long oligo(oxyethylene) bridge and which does not display intramolecular Pt⋯Pt and π–π interactions can act as an effective ‘gelling stimulus’ for mononuclear [PtII(C^N^N)CNR]+ complexes in aqueous solutions, resulting in the formation of a nematic hydrogel that is persistent and displays red photoluminescence.

Graphical abstract: Phosphorescent nematic hydrogels and chromonic mesophases driven by intra- and intermolecular interactions of bridged dinuclear cyclometalated platinum(ii) complexes

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Publication details

The article was received on 14 Jan 2014, accepted on 20 Feb 2014 and first published on 17 Apr 2014


Article type: Edge Article
DOI: 10.1039/C4SC00143E
Citation: Chem. Sci., 2014,5, 2482-2488
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    Phosphorescent nematic hydrogels and chromonic mesophases driven by intra- and intermolecular interactions of bridged dinuclear cyclometalated platinum(II) complexes

    X. Xiao, W. Lu and C. Che, Chem. Sci., 2014, 5, 2482
    DOI: 10.1039/C4SC00143E

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