Accession Number : ADA295640

Title :   Effects of Electronic Delocalization and Molecular Size on Intramolecular Proton Transfer.

Descriptive Note : Technical rept.,

Corporate Author : ROCHESTER UNIV NY DEPT OF CHEMICAL ENGINEERING

Personal Author(s) : Tarkka, R. M. ; Jenekhe, S. A.

PDF Url : ADA295640

Report Date : 08 JUN 1995

Pagination or Media Count : 20

Abstract : Well known 2-(2-hydroxyphenyl)benzoxazole 1, intramolecular hydrogen-bonded compound bis-2,5- (2-benzoxazolyl)phenol, 3, and the new polymers poly(m-(2-hydroxy)-phenylene benzobisoxazole) (mHPBO, 4) and poly(p-(2-hydroxy)-phenylene benzobisoxazole) (pHPBO, 5), are used to elucidate the effects of molecular size, conjugation length, and competition with excimer formation on excited-state intramolecular proton transfer (ESIPT). It is shown that whereas 1, 3 and 4 exhibit ESIPT, S does not. The results suggest that whereas molecular size does not appear to inhibit ESIPT, the competition with excimer formation and the extent of pi-electron delocalization both do. jg

Descriptors :   *PROTONS, *ELECTRON TRANSFER, *MOLECULAR PROPERTIES, ELECTRONICS, HYDROGEN BONDS, POLYMERS, EXCITATION, LENGTH, ORGANIC COMPOUNDS, MOLECULE MOLECULE INTERACTIONS, PHENYL RADICALS, EXCIMERS, PHENOLS, HYDROXYL RADICALS.

Subject Categories : Organic Chemistry
      Inorganic Chemistry
      Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE