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Issue 19, 2015
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Electronic communication between fluorescent pyrene excimers and spin crossover complexes in nanocomposite particles

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Abstract

Bistable [Fe(H-trz)2(trz)]BF4 core and silica shell hybrid nanoparticles with different sizes between 50–150 nm were grafted with a pyrene-derivative fluorophore. The fluorescent composites exhibited both monomer and excimer luminescence (with a controllable ratio), whilst their spin transition properties remained unaltered. When switching the particles from the diamagnetic to the paramagnetic state the excimer lifetime and luminescence intensity increased and the emission spectra were redshifted, while the monomer emission exhibited negligible spin-state dependence. The strong coupling of the pyrene excimers with the spin-state of the ferrous ions was shown to occur via a non-radiative mechanism, brought about, to a large extent, by the spin transition induced mechanical strain.

Graphical abstract: Electronic communication between fluorescent pyrene excimers and spin crossover complexes in nanocomposite particles

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Publication details

The article was received on 09 Mar 2015, accepted on 14 Apr 2015 and first published on 15 Apr 2015


Article type: Paper
DOI: 10.1039/C5TC00667H
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J. Mater. Chem. C, 2015,3, 5026-5032

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    Electronic communication between fluorescent pyrene excimers and spin crossover complexes in nanocomposite particles

    I. Suleimanov, O. Kraieva, J. Sánchez Costa, I. O. Fritsky, G. Molnár, L. Salmon and A. Bousseksou, J. Mater. Chem. C, 2015, 3, 5026
    DOI: 10.1039/C5TC00667H

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