Influence of organic acids on UV-Vis spectra of pyrrolidino[60]fullerene derivatives

Citation
Cm. Du et al., Influence of organic acids on UV-Vis spectra of pyrrolidino[60]fullerene derivatives, CHIN SCI B, 46(14), 2001, pp. 1156-1159
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Multidisciplinary
Journal title
CHINESE SCIENCE BULLETIN
ISSN journal
1001-6538 → ACNP
Volume
46
Issue
14
Year of publication
2001
Pages
1156 - 1159
Database
ISI
SICI code
1001-6538(200107)46:14<1156:IOOAOU>2.0.ZU;2-C
Abstract
A pyrrolidino[60]fullerene 1 with pyrrolidine group was synthesized and cha racterized. The UV-Vis spectra showed that the blue shift of absorption pea ks was first observed when strong organic acids such as p-toluene sulfonic or trifluoroacetic acid were added to the solution of pyrrolidino[60]fuller ene 1 in dichloromethane. The results indicated that the pyrrolidino[60]ful lerene derivatives without pyrrolidine group also possess the same phenomen on. Experiments and computation with the MOPAC 7.0 semi-empirical PM3 metho d demonstrated the reason that some energy gaps on [60]fullerene skeleton w ere increased because electronic charges on [60]fullerene framework transfe rred to pyrrolidine ring when strong organic acids were added into pyrrolid ino[60]fullerene derivatives' solution; as the result, the complexes could be formed and some absorption wavelengths blue shifted in the UV-Vis spectr um.