Intramolecular coaggregation behavior in novel cyclotriveratrylenes with cholic acid podants

Citation
Zt. Li et al., Intramolecular coaggregation behavior in novel cyclotriveratrylenes with cholic acid podants, CHIN J CHEM, 19(3), 2001, pp. 308-316
Citations number
54
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry
Journal title
CHINESE JOURNAL OF CHEMISTRY
ISSN journal
1001-604X → ACNP
Volume
19
Issue
3
Year of publication
2001
Pages
308 - 316
Database
ISI
SICI code
1001-604X(200103)19:3<308:ICBINC>2.0.ZU;2-2
Abstract
Two molecules la and Ib consisting of one cyclotriveratrylene (CTV) and thr ee cholic acid pedants have been designed and synthesized. Fluorescent stud ies in water/dimethoxyethane mixtures reveal an intramolecular coaggregatio n between the CTV and the attached cholic acid moieties. Their fluorescent emission intensity increases and then decreases with the increase of water content, whereas under the same measuring conditions the intensity of CTV d erivative 2a, which possesses no similar cholic acid moiety, increases and then reaches a maximum value. The intensity decrease in la and Ib has been attributed to the decrease of the microenvironmental polarity in media of i ncreasing polarity because of the shielding effect of the hydrophobic face of the cholic acid moiety.