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Lord George Porter at the time of the development of flash photolysis Photograph Lady Porter. http://photochemistryportal.net/home/index.php/2009/09/21/origins-of-flash-photolysis-george-porter/. Quartz Cell. Spectrograph. Spec flash. Absorption spectrum of CBr radical
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Lord George Porter at the time of the development of flash photolysis Photograph Lady Porter http://photochemistryportal.net/home/index.php/2009/09/21/origins-of-flash-photolysis-george-porter/
Quartz Cell Spectrograph Spec flash Absorption spectrum of CBr radical photographic plate CHBr3 + HBr + Br → .CBr UV Flash Lamp Trigger Spark Gap Photocell Spec flash spark gap Charge capacitors High power capacitor bank Delay Delay unit Capacitor Flash Photolysis Apparatus – Porter and Norrish
Spectroscopic absorption intensity of CH3 hv → Photodissociation ← Recombination CH3 + CH3 CH3CH3 0 200 400 600 800 μsec
Spectroscopic absorption intensity of CH3 0 200 400 600 800 μsec
Spectroscopic absorption intensity of CH3 hv CH3CH3→ CH3 + CH3 Photodissociation CH3 + CH3→ CH3CH3 Recombination Kinetics 0 200 400 600 800 μsec
Left: Lord George Porter at the time of the development of flash photolysis. Image generously donated by Lady Porter, (c) Lady Porter; used with permission. Right: The first flash photolysis apparatus. From Thrush, Photochem. Photobiol. Sci., 2003, 2, 453–454 - used by permission of the Royal Society of Chemistry - see link below) http://photochemistryportal.net/home/index.php/2009/09/21/origins-of-flash-photolysis-george-porter/