Viologen derivative chiral

The stereoselective luminescence quenching of the MLCT excited A- [Ru(bpy)3] was also carried out in water (I = 0.01 mol dm ) with the different chiral viologen derivatives by Tsukahara and collaborators [22]. In chiral viologens, l,r-bis(l-phenylethylcarbamoylmethyl)-4,4 -bipyridinium (OAV ), l,l -bis(l-naphthylethylcarbamoylmethyl)-4,4 -bipyridinium (POAV " ), and 1-(1 -phenylethyl-carbamoy Imethyl)-1 -( 1 -naphthylethylcarbamoylmethyl)-4,4 -bipyridinium (NPOAV " ), the optically active groups, are introduced to the 1,1 -positions through the amido group, as shown in Scheme 6. 

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