443286-01-9Relevant academic research and scientific papers
Terpyridine Zn(II), Ru(III), and Ir(III) complexes: The relevant role of the nature of the metal ion and of the ancillary ligands on the second-order nonlinear response of terpyridines carrying electron donor or electron acceptor groups
Tessore, Francesca,Roberto, Dominique,Ugo, Renato,Pizzotti, Maddalena,Quici, Silvio,Cavazzini, Marco,Bruni, Silvia,De Angelis, Filippo
, p. 8967 - 8978 (2008/10/09)
Coordination of 4′-(C6H4-p-X)-2,2′: 6′,2″-terpyridines [X = NO2, NBu2, (E)-CH=CH-C6H4-p-NBu2, (E,E)=(CH=CH) 2-C6H4-p-NMe2] to Zn(II), Ru(III), and Ir(III) metal centers induces a significant enhancement of the absolute value of the second-order nonlinear optical (NLO) response of the terpyridine, measured by means of both electric field induced second harmonic generation and solvatochromic methods. By varying the nature of the metal center, the enhanced second-order NLO response shifts from positive to negative. Such a shift is controlled by electronic charge-transfer transitions, such as metal-to-ligand or ligand-to-metal transitions, in addition to the intraligand charge transfer. The enhancement generated by coordination is also controlled by the chelation effect and by fine-tuning of the ancillary ligands.
Terpyridine Zn(II), Ru(III) and Ir(III) complexes as new asymmetric chromophores for nonlinear optics: First evidence for a shift from positive to negative value of the quadratic hyperpolarizability of a ligand carrying an electron donor substituent upon
Roberto, Dominique,Tessore, Francesca,Ugo, Renato,Bruni, Silvia,Manfredi, Amedea,Quici, Silvio
, p. 846 - 847 (2007/10/03)
The synthesis of 4′-(C6H4-p-NBu2)-2,2′:6′, 2″-terpyridine and the strongly enhanced second-order NLO response of its Zn(II), Ru(III) and Ir(III) complexes are reported, evidencing for the first time a shift from positive t
