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Issue 18, 2015
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Switchable platinum-based tweezers with Pt–Pt bonding and selective luminescence quenching

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Abstract

Molecular tweezers incorporating peripheral platinum salphen complexes and a central chelating terpyridine group have been synthesized. The terpyridine can be switched upon metal binding between a free ‘W’ shaped form and a coordinated ‘U’ form. The crystallographic structure of the zinc-closed molecular tweezers was obtained and presented a strong π-stacking between the Pt–salphen units associated with a Pt–Pt bond. The luminescence properties, notably in response to selected guest ions (Zn2+, Pb2+, Hg2+) and the resulting mechanical motion, have been investigated by UV-Vis and emission spectroscopy. While ion coordination to the terpy resulted in no significant changes in the luminescence, a selective intercalation of a second Hg2+ associated with a large differential quenching was observed.

Graphical abstract: Switchable platinum-based tweezers with Pt–Pt bonding and selective luminescence quenching

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Publication details

The article was received on 20 Oct 2014, accepted on 16 Dec 2014 and first published on 16 Dec 2014


Article type: Paper
DOI: 10.1039/C4DT03230F
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Citation: Dalton Trans., 2015,44, 8543-8551
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    Switchable platinum-based tweezers with Pt–Pt bonding and selective luminescence quenching

    B. Doistau, C. Rossi-Gendron, A. Tron, N. D. McClenaghan, L. Chamoreau, B. Hasenknopf and G. Vives, Dalton Trans., 2015, 44, 8543
    DOI: 10.1039/C4DT03230F

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