Relaxation Processes from the Highly Excited States in the Molecular Systems Based on the Methylene Blue

Abstract

The theoretical and experimental studies of relaxation of the methylene blue molecules (MB) out of the highly excited states have allowed to show the existence of nonbinding potential surfaces, which correspond to excited σσS* and σσN* states, which leads to bond dissociation S-C and N-C, localized in the vicinity of the symmetry axis of the MB molecule; the electron transfer from the highly excited σσS*-state of MB on the matrix causes the appearance of dication MBNH2 + typical for acidified (pH < 1) aqueous solutions of MB; two-quantum excitation of MB by light with hν < E(σσS*) leads to phototransfer electron and hydrogen atom from matrix onto MB and the formation of the leuco form of dye MBNH. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/30284