PROTEUS. Nanosecond Transient Absorption of Rubpy and MV.
Transcript of PROTEUS. Nanosecond Transient Absorption of Rubpy and MV.
PROTEUSFlash Photolysis Spectrometer
Electron Transfer from Ru(bpy)32+ to MV2+
Experimental Details
• Laser: Lasertechnik Berlin MNL 100 N2 Laser (337nm) producing
90 μJ/pulse at 50 Hz
• Sample: Varying mixtures of Ru(bpy)32+ and Methyl Viologen
(MV2+) in acetonitrile under continuous argon purge
• Sample concentrations
– Sample 1: 40 micromolar (μM) Ru(bpy)32+ , 25 mM KPF6, 0 mM MV2+
– Sample 2: 40 micromolar (μM) Ru(bpy)32+ , 25 mM KPF6, 3 mM MV2+
– Sample 3: 40 micromolar (μM) Ru(bpy)32+ , 25 mM KPF6, 6 mM MV2+
– Sample 4: 40 micromolar (μM) Ru(bpy)32+ , 25 mM KPF6, 9 mM MV2+
Measurement Details• Initial excitation of Ru(bpy)3
2+
• e- transfer from Ru(bpy)32+ to MV2+
• Observe appearance of MV+ and disappearance of Ru(bpy)32+
• Kinetics of electron transfer process concentration dependent
Spectra
Spectra
Kinetics
Kinetics
Kinetics