Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
INCLUSION OF (AMINOSTYRYL)-1-METHYLPYRIDINIUM DYES BY BETA-CYCLODEXTRIN AND ITS USE FOR FLUORESCENT-PROBE STUDIES ON ASSOCIATION OF CATIONIC AND NEUTRAL MOLECULES WITH BETA-CYCLODEXTRIN
Autore:
PARK JW; PARK KH;
Indirizzi:
EWHA WOMANS UNIV,DEPT CHEM SEOUL 120750 SOUTH KOREA
Titolo Testata:
Journal of inclusion phenomena and molecular recognition in chemistry
fascicolo: 3, volume: 17, anno: 1994,
pagine: 277 - 290
SICI:
0923-0750(1994)17:3<277:IO(DBB>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHARGE-SHIFT PROBES; ALPHA-CYCLODEXTRIN; CRYSTAL-STRUCTURE; AQUEOUS-SOLUTION; COMPLEXES; BINDING; ALCOHOL; SURFACTANTS; CONSTANTS; BROMIDE;
Keywords:
BETA-CYCLODEXTRIN; INCLUSION COMPLEXES; FLUORESCENCE; AMINOSTYRYL DYES; ASSOCIATION CONSTANTS; FLUORESCENT-PROBE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
J.W. Park e K.H. Park, "INCLUSION OF (AMINOSTYRYL)-1-METHYLPYRIDINIUM DYES BY BETA-CYCLODEXTRIN AND ITS USE FOR FLUORESCENT-PROBE STUDIES ON ASSOCIATION OF CATIONIC AND NEUTRAL MOLECULES WITH BETA-CYCLODEXTRIN", Journal of inclusion phenomena and molecular recognition in chemistry, 17(3), 1994, pp. 277-290

Abstract

2-(or 4-(Dimethylamino)styryl]-1-methylpyridiniumiodides (2-ASP and 4-ASP) form 1 : 1 inclusion complexes with beta-cyclodextrin (beta-CD). The association constant is about 1000 M-1 for both dyes in aqueous solution at 25-degrees-C. The complexation results in a 7.6- and 4.9-fold increase in the fluorescence intensities of 2-ASP and 4-ASP, respectively. The formation of inclusion complexes of n-alkylamines (n = 4 -10), n-alkylammonium ions (n = 4 - 10), n-alkyl alcohols (n = 4 - 9),and n-alkyltrimethylammonium bromides (C(n)TAB: n = 12, 14, 16) with beta-CD was studied by a fluorescent-probe method using 2-ASP as a probe. The association constants K were obtained from nonlinear least-square regression analysis of the fluorescence titration data. The logarithm of the 1 : 1 association constants varies approximately linearly with the number of carbon atoms (n(c)) of the alkyl chain up to n(c) = 7 and then the dependence of log K on n(c) is less pronounced for longer alkyl chains: for C(n)TAB, 1 : 2 complexation was also observed. Combining the present result with a previous work [15], we found that the increasing order of stability of beta-CD complexes of amphiphilic molecules with the same hydrocarbon tail but different head groups is ammonium.< sulfonate < alcohol congruent-to amine < sulfate. The association constants obtained from this method are compared with those givenby other investigators and the discrepancies are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/09/20 alle ore 05:49:48