Spectroscopic and Computational Study of Ligand Photodissociation from [Ru(dipyrido[3,2-a:2′,3′-c]phenazine)(4-aminopyridine)4]2

• Published in: European Journal of Inorganic Chemistry Vol. 2010; no. 8; pp. 1186 - 1195
• Main Authors: Ruiu, Tiziana, Garino, Claudio, Salassa, Luca, Pizarro, Ana M., Nervi, Carlo, Gobetto, Roberto, Sadler, Peter J.
• Format: Book Review Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01-03-2010; WILEY‐VCH Verlag
• Subjects: Density functional calculations; Dipyridophenazine; N ligands; Photochemistry; Ruthenium
• ISSN: 1434-1948; 1099-0682
• DOI: 10.1002/ejic.200900990

The new complex [Ru(dppz)(4AP)4]2+ (1, in which dppz = dipyrido[3,2‐a:2′,3′‐c]phenazine and 4AP = 4‐aminopyridine) has been synthesized, characterized and its photophysical and photochemical properties have been studied by combining spectroscopic and computational [DFT and time‐dependent (TD) DFT] methods. Upon irradiation in aqueous solution, complex 1 selectively photoreleases one 4AP ligand and subsequently coordinates a water molecule to form [Ru(dppz)(4AP)3(OH2)]2+.
In aqueous solution, the photoactive complex [Ru(dipyrido[3,2‐a:2′,3′‐c]phenazine)(4‐aminopyridine)4]2+ selectively releases one 4‐aminopyridine ligand when irradiated with visible light.