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New photochromic xerogels composites based on nitrosyl complexes

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Abstract

New photoswitchable hybrid materials based on mononitrosyl complexes with excellent optical properties have been obtained by sol–gel process. Inclusion in silica matrix prepared from tetramethoxysilane precursor leads to new materials in which the ruthenium complex [RuCl(NO)py4](PF6)2·1/2H2O (py = pyridine) is stabilized as crystalline nanoparticles with diameters between 2 and 15 nm. Photochromic properties are maintained and have been evidenced by infrared spectroscopy under irradiation (λ = 473 nm) at low temperature (T = 100 K). The reversible transfer from the ground state (GS) to the metastable state (MS1) is about 40% in the composite, which is close to the value observed on the most studied sodium nitroprusside (50% on pure material).

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Authors and Affiliations

  1. CNRS-LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, 31077, Toulouse, France

    Benoit Cormary, Isabelle Malfant & Lydie Valade

  2. Université de Toulouse; UPS, INPT, LCC, 31077, Toulouse, France

    Benoit Cormary, Isabelle Malfant & Lydie Valade

Authors
  1. Benoit Cormary
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  2. Isabelle Malfant
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  3. Lydie Valade
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Correspondence to Isabelle Malfant.

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Cormary, B., Malfant, I. & Valade, L. New photochromic xerogels composites based on nitrosyl complexes. J Sol-Gel Sci Technol 52, 19–23 (2009). https://doi.org/10.1007/s10971-009-2034-y

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  • DOI: https://doi.org/10.1007/s10971-009-2034-y

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