Photophysics on solid surfaces. Ground state configuration of dimeric pyrene in the adsorbed state on a silica gel surface and geometrical relaxation for excimer formation
✍ Scribed by Tsuneo Fujii; Etsuro Shimizu
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 421 KB
- Volume
- 137
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
The fluorescence and fluorescence-excitation spectra of adsorbed pyrene on a silica gel surface at low surface coverage have been observed. Pyrene exists as a monomer and dimer in its ground state on a silica gel surface when adsorption occurs from cyclohexane solution. Based on the fluorescence-excitation spectra of the adsorbed pyrene, the dimeric configuration of adsorbed pyrene is estimated. The results imply that large intermolecular movement between the unexcited monomer unit and the excited monomer unit in dimeric pyrene is necessary to form a certain excimer geometry.
' ) Observed in light petroleum. Taken from ref. [ 61. d, Observed in ethanol. Taken from ref. [ 71,