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Titolo:
Chiral detection of carotenoid assemblies
Autore:
Zsila, F; Bikadi, Z; Deli, J; Simonyi, M;
Indirizzi:
CRC, Inst Chem, Dept Mol Pharmacol, H-1525 Budapest, Hungary CRC Budapest Hungary H-1525 Dept Mol Pharmacol, H-1525 Budapest, Hungary Univ Pecs, Sch Med, Dept Med Chem, Pecs, Hungary Univ Pecs Pecs HungaryUniv Pecs, Sch Med, Dept Med Chem, Pecs, Hungary
Titolo Testata:
CHIRALITY
fascicolo: 8, volume: 13, anno: 2001,
pagine: 446 - 453
SICI:
0899-0042(200108)13:8<446:CDOCA>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
RESONANCE RAMAN; ZEAXANTHIN; SPACE;
Keywords:
supramolecular chirality; circular dichroism; exciton signals; mixed aggregates; J to H transformation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Simonyi, M CRC, Inst Chem, Dept Mol Pharmacol, POB 17, H-1525 Budapest, Hungary CRC POB 17 Budapest Hungary H-1525 7, H-1525 Budapest, Hungary
Citazione:
F. Zsila et al., "Chiral detection of carotenoid assemblies", CHIRALITY, 13(8), 2001, pp. 446-453

Abstract

Carotenoid assemblies were produced by aqueous dilution of ethanolic solutions. UV/VIS and CD spectroscopy revealed the formation of J- and H-types of aggregates of both right- and left-handed kinds. Simulation of UV/VIS spectra of the aggregates showed characteristic differences between the two types. 6 ' -Epimers of capsanthol ((all-E,3R,3 'S,5 'R)beta,kappa -carotene-3,3 ' ,6 ' -triols) formed assemblies with increased chirality in dilute solution. While the absorption of 6 'R-capsanthol giving H-type aggregate doesnot depend on the concentration, 6 'S-capsanthol yielding J-type assembly showed concentration-dependent absorption intensity. Dilute aggregate of 6 'R-capsanthol is characterized by an extremely large A value of -6,600. Thetransformation of J- to H-type assembly was observed in the mixtures of the epimers, producing an intermediate kind of aggregate. A hypothetical structure for H-type assemblies is proposed. (C) 2001 Wiley-Liss, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 07:49:05