Details

Autor(en) / Beteiligte

• Boixel, Julien
• Guerchais, Véronique
• Le Bozec, Hubert
• Jacquemin, Denis
• Amar, Anissa
• Boucekkine, Abdou
• Colombo, Alessia
• Dragonetti, Claudia
• Marinotto, Daniele
• Roberto, Dominique
• Righetto, Stefania
• De Angelis, Roberta

Titel

Second-Order NLO Switches from Molecules to Polymer Films Based on Photochromic Cyclometalated Platinum(II) Complexes

Ist Teil von

• Journal of the American Chemical Society, 2014-04, Vol.136 (14), p.5367-5375

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.