Add time:09/28/2019         Source:infona.pl

A new type of binuclear Ru(II) complex [Ru(TAP) 2 (TAP-TAP)Ru(TAP) 2 ] 4 + (1 (TAP-TAP=2,2'-bis(1,4,5,8-tetraazaphenanthrene)) produced by photo-reaction of Ru(TAP) 3 2 + in the presence of 5'-guanosine-monophosphate (5'-GMP) has been isolated and characterised. The formation of 1 is proposed to proceed via mono-reduced Ru(TAP) 3 2 + , i.e. [Ru 2 + (TAP) 2 (TAP - )] + . The emission lifetime of 1 is much greater than that of Ru(TAP) 3 2 + , consistent with an increased energy gap between the 3 MLCT and 3 MC states in 1. This arises because of stabilisation of its 3 MLCT state due to the localisation of the excited state electron on the TAP-TAP ligand.

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