Quenching of the Emission Intensity of Ru(bpy)32+ (22.1 to 23.2 %) in Zeolite Y in the Absence and Presence of 200 mM Co(dppphen)33+ Under Various Loadings of TiO2.
Quenchingc[Co] = 200 mM
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% Ru(bpy)32+a,b |
% TiO2a |
Quenchingc[Co] = 0 mM
|
Calculatedd,e |
Observedd |
23.2 |
17.3 |
1.56 |
1.90 |
2.25 |
22.9 |
24.2 |
1.68 |
2.05 |
2.37 |
22.5 |
31.8 |
1.89 |
2.30 |
4.15 |
22.1 |
37.1 |
2.71 |
3.31 |
4.55 |
aPercent by weight. b25.1% loading represents one Ru(bpy)32+ complex in each supercage. cFrom the integrated emission at each TiO2 loading relative to 0% TiO2 at 23.3% Ru(bpy)32+ loading. dThe emission intensity quenching by 200 mM Co(dpphen)33+ in the absence of TiO2 is Io/I = 1.22. eCalculated from the quenching by TiO2 at each %TiO2 loading multiplied by the quenching by 200 mM Co(dpphen)33+ in the absence of TiO2 (1.22).