0 5 10 15 20 25 30 500 550 600 650 700 750 800 Wavelength (nm

CREATED USING THE RSC ARTICLE TEMPLATE - SEE WWW.RSC.ORG/ELECTRONICFILES FOR FURTHER DETAILS
Fig. S1 Molecular structure of [Ru(phen)2(L1)]+ showing atomic numbering.
30
25
E
mi 20
ssi
on 15
int
ens
10
ity
5
0
500
550
600
650
700
Wavelength (nm)
750
800
Fig. S2 pH dependence of the emission spectra of [Ru(phen)2(L2)]+ (5 X 10-5 M) in an aqueous Britton-Robinson buffer at pH 1.72, 2.11, 2.32,2.84,
3.22, 3.53, 3.85, 4.11, 5.28 and 6.15.
19