Tag : Electronic Transitions

Quantum Chemical Models of Electronic Transitions of Conjugated Dyes

By: Brittany Schaum Abstract                   UV-Vis spectroscopy was used to determine the energy of transition, △E  , from the highest occupied molecular orbital (HOMO) to the lowest unoccupied molecular orbital (LUMO) of several cationic dyes. Each dye contains a conjugated, hydrocarbon π system with nitrogens at each end, which act as potential barriers for the π electrons in these systems. In this experiment, we have treated each dye as a one-dimensional “particle in a box” in order to simplify the […]