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Emission quenching of [Ru(bpy)2(4, 4’-dcbpy)] (PF6)2 (1) by benzenamine,4-[2-[5-[4-[4-dimethylamino]phenyl]-4,5-di-hydro-1-phenyl-1H-pyrazol-3-yl]-ethenyl]-N,N-dimetyl (2) or 1, 5-diphenyl-3-(2-phenothiazine)-2-pyrazoline (3) was observed. Measurements of the emission decay of 1 before and after addition of 2 or 3 by single photon counting technique con-finned the observations. The emission quenching of 1 by 2 or 3 was submitted to Stern-Volmer equation. It was calculated that the quenching rate constants (kq) are 5.5 × 109(mol/L)-1s-1 for 2 and 4.0 × 109(mol/L)-1s-1 for 3, respectively. These results indicated a character of dynamic quenching process. The singlet-state of 2 or 3 was also quenched by 1. The quenching behaviors did not conform to the Stern- Volmer equation and involved both static and dynamic quenching processes. The apparent quenching rate constant (kapp) was calculated to be 3 × 109 (mol/L)-1 for the interaction of excited 2 with 1, and 1.2 × 109 (mol/L)-1 for that of excited 3 wit
Emission quenching of [Ru (bpy) 2 (4,4’-dcbpy)] (PF6) 2 (1) by benzenamine, 4- [2- [5- [4- [dimethylamino] -di-hydro-1-phenyl-1H-pyrazol-3-yl] -ethenyl] -N, N-dimetyl (2) Measurements of the emission decay of 1 before and after addition of 2 or 3 by single photon counting technique con-finned the observations. The emission quenching of 1 by 2 or 3 was submitted to Stern-Volmer equation. It was calculated that the quenching rate constants (kq) are 5.5 × 109 (mol / L) -1s-1 for 2 and 4.0 × 109 (mol / L) -1s-1 for 3, respectively. These results indicate that a character of the dynamic quenching process The singlet-state of 2 or 3 was also quenched by 1. The quenching behaviors did not conform to the Stern-Volmer equation and involved both static and dynamic quenching processes. The apparent quenching rates constant (kapp) was calculated to be 3 × 109 (mol / L) -1 for the interaction of excited 2 with 1, and 1.2 × 109 (mol / L) -1 for tha t of excited 3 wit