Terpyridine Zn (II), Ru (III) and Ir (III) complexex 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 coordination to different metal centres.
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 to negative value of the ligand quadratic hyperpolarizability by varying the nature of the metal centre.    .
Dominique
Roberto
R
Dipartimento di Chimica Inorganica, Metallorganica e Analitica and Centro CNR CSSSCMTBSO Universitá di Milano, Via G. Venezian, 21, 1-20133  Milano, Italty. dominique.roberto@unimi.it
Francesca
Tessore
T
Renato
Ugo
U
Silivia
Bruni
B
Amedea
Manfrdi
M
Silvio
Quici
Q
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004583:Electrons; D007495:Iridium / Q000737:chemistry*; D008024:Ligands; D011725:Pyridines / Q000737:chemistry* / Q000378:metabolism; D012413:Rubidium / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry*
D008024:Ligands; D011725:Pyridines; D007495:Iridium; D015032:Zinc; D012413:Rubidium; C023666:pyridine