Electrochromism (Stark Effect) in Solids Due to Isolated Absorbing Centers

Autor:	J. C. Powers, J. Kumamoto, W. R. Heller
Rok vydání:	1962
Předmět:	Bond dipole moment Absorption spectroscopy Chemistry Transition dipole moment General Physics and Astronomy symbols.namesake Dipole Stark effect Absorption band Excited state symbols Physical and Theoretical Chemistry Atomic physics Local field
Zdroj:	The Journal of Chemical Physics. 36:2893-2896
ISSN:	1089-7690 0021-9606
Popis:	A study has been made of the effect of applied electric fields upon the absorption spectrum of a dye molecule (methyl red) dissolved in a relatively inert, transparent, matrix of high dielectric strength (polystyrene). Theory indicates that the existence of a large dipole moment in either ground or excited state (or in both, if the moment differs in the two states) should lead to a broadening of the absorption band. In contrast, excited states of appropriate type lying close to that involved in the transition should produce a shift to the red. In the present instance the second shift dominates, and one observes, with a field of about one million v/cm, a shift of around 10 A of the principal band which is centered near 5000 A. Possible uses of this technique are in evaluating the local field at an absorbing molecule and in estimating dipole moments of various states.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0e4638be1e1f68208946eda2d5d53a99 https://doi.org/10.1063/1.1732398 Zobrazit plný text záznamu