Issue 19, 2015
From the journal:

Journal of Materials Chemistry C

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

I. Suleimanov,ab   O. Kraieva,ac   J. Sánchez Costa,a   I. O. Fritsky,b   G. Molnár,a   L. Salmon*a  and  A. Bousseksou*a  

* Corresponding authors

a Laboratoire de Chimie de Coordination, CNRS & Université de Toulouse (INPT, UPS), 31077 Toulouse, France
E-mail: lionel.salmon@lcc-toulouse.fr, azzedine.bousseksou@lcc-toulouse.fr

b Department of Chemistry, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine

c Kyiv Polytechnic Institute, National Technical University of Ukraine, 03056 Kyiv, Ukraine

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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Article information

DOI
https://doi.org/10.1039/C5TC00667H
Article type
Paper
Submitted
09 Mar 2015
Accepted
14 Apr 2015
First published
15 Apr 2015

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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