Electrochemical and Spectroscopic Properties of Cyclometallated and Non-Cyclometallated Ruthenium(II) Complexes Containing Sterically Hindering Ligands of the Phenanthroline and Terpyridine Families

✍ Scribed by Francesco Barigelletti; Barbara Ventura; Jean-Paul Collin; Robert Kayhanian; Pablo Gaviña; Jean-Pierre Sauvage

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 304 KB
• Volume: 2000
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/(sici)1099-0682(200001)2000:1<113::aid-ejic113>3.0.co;2-9

✦ Synopsis

Two series of cyclometallated and noncyclometallated observed for the two series: a remarkable feature is the observation of relatively long-lived MLCT excited states ruthenium(II) complexes incorporating mono-or disubstituted 1,10-phenanthroline-and 2,2Ј:6Ј,2ЈЈ-terpyridine-type (from 70 to 106 ns at room temperature in CH 3 CN) for three of the cyclometallated complexes. A discussion is given on ligands have been synthesized and characterized. An X-ray crystal structure for one of the complexes, Ru(ttpy)(mapH)-the role of factors like sigma donation by the cyclometallating ligands, interligand steric hindrance and (Cl)(PF 6 ), has been obtained (mapH = 2-p-anisyl-1,10phenanthroline; ttpy = 4Ј-tolyl-2,2Ј:6Ј,2ЈЈ-terpyridine). Distinct interligand π-π interactions that affect the electrochemical and spectroscopic properties. electrochemical and photophysical properties have been port of some properties of compounds 4, 7, and 9 has been N 6 coordination sphere or to the N 5 C set. [9] The reaction versite ´Louis Pasteur, of paramagnetic ruthenium(III) species (RuLCl 3 ; L ϭ ttpy,