Second-order NLO switches from molecules to polymer films based on photochromic cyclometalated platinum(II) complexes
Articolo
Data di Pubblicazione:
2014
Citazione:
Second-order NLO switches from molecules to polymer films based on photochromic cyclometalated platinum(II) complexes / J. Boixel, V. Guerchais, H. Le Bozec, D. Jacquemin, A. Amar, A. Boucekkine, A. Colombo, C. Dragonetti, D. Marinotto, D. Roberto, S. Righetto, R. De Angelis. - In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - ISSN 0002-7863. - 136:14(2014), pp. 5367-5375. [10.1021/ja4131615]
Abstract:
Novel photochromic dithienylethene-based platinum(II) complexes (C ^N^N)Pt(C≡C-DTE-C6H4-D) ((C^N^N) = 4,4′-di(n-hexyl)-6-phenyl-2,2′- bipyridine; D = H, NMe2) were prepared and characterized. Their excellent photochromic properties allow the photoinduced switching of their second-order nonlinear optical properties in solution, as measured by the EFISH technique, due to formation of an extended π-conjugated ligand upon suitable electromagnetic radiation. Insights into the electronic structures of the complexes and the nature of their excited states have been obtained by DFT and TD-DFT calculations. These novel Pt(II) complexes were nanoorganized in polymer films which were poled, affording new materials characterized by a good second-order NLO response that can be easily switched, with an excellent NLO contrast. To the best of our knowledge, our compounds allowed designing the very first examples of switchable NLO polymer films based on metal complexes.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
nonlinear-optical properties; 2ND-harmonic generation; metal-complexes; quadratic hyperpolarizability; thin-films; zinc(II) complexes; excimer emission; building-blocks; acceptor groups; III complexes
Elenco autori:
J. Boixel, V. Guerchais, H. Le Bozec, D. Jacquemin, A. Amar, A. Boucekkine, A. Colombo, C. Dragonetti, D. Marinotto, D. Roberto, S. Righetto, R. De Angelis
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