Effect of Intersystem Crossing Enhancement on the Hole-Burning Process of Metal-Free Porphyrin,
Abstract
The photochemical reaction in the hole-burning process of metal-free porphyrins has been ascribed to the photoinduced tautomerism of central two protons through the triplet state. For further understanding of the reaction mechanism, one of the useful approaches is to modify the lifetimes of the excited states without changing energy levels. The population of electronic states under laser-excitation will be influenced considerably, but the electronic structure itself will not change so much. The quantum yield of the hole-formation will be also influenced if it depends mainly on the population of the state where the reaction starts. In this study, we modified the lifetimes by enhancing the intersystem crossing rates with a paramagnetic effect of copper(II) atom. The starting point of the reaction will be discussed with the quantum yields and the population of the states.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP008293
Entities
People
- Toshiro Tani
- Youichi Sakakibara
- Youkoh Kaizu
Organizations
- Tokyo Institute of Technology