Utilization of micro-reflectance spectroscopy and visual comparison of pigmented samples to evaluate a new standard color order system.
Characterization of the excited-state structure and dynamics of the retinal chromophore in rhodopsin using resonance Raman intensities and holeburning spectroscopy. Determination of the mechanism of wavelength regulation in visual pigments by using resonance Raman spectroscopy of single photoreceptors at cryogenic temperatures. Elucidation of the ground state retinal binding pocket structure in rhodopsin and its effect on the photochemistry of the retinal chromophore using structural analogs. Development of biochemical preparations of rhodopsin. Performance of excited-state dynamics, and vibrational and electronic structure calculations.
Probed dynamics of electron transfer in donor-appended porphyrins and metalloporphyrins using time-resolved picosecond absorption, cw fluorescence and time-resolved fluorescence spectroscopies. Determined initial excited-state distortions using UV resonance Raman intensities in a series of nitroaromatics with charge transfer states. Characterized porphyrin singlet and triplet excited-state structure using picosecond time-resolved resonance Raman spectroscopy.