Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Manufacture of modified poly(vinyl acetal) showing fluorescence and molecular recognition
Autore:
Xu, WJ; Weng, J; Li, GF; Cao, YQ; Yu, RQ;
Indirizzi:
Hunan Univ, Dept Chem & Chem Engn, Changsha 410082, Peoples R China Hunan Univ Changsha Peoples R China 410082 ngsha 410082, Peoples R China Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China Zhejiang Univ Hangzhou Peoples R China 310027 ou 310027, Peoples R China
Titolo Testata:
JOURNAL OF APPLIED POLYMER SCIENCE
fascicolo: 12, volume: 73, anno: 1999,
pagine: 2385 - 2390
SICI:
0021-8995(19990919)73:12<2385:MOMPAS>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYMERS;
Keywords:
poly(vinyl acetal); 4-dimethylaminobenzaldehyde; synthesis; fluorescence; quenching; molecular recognition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
9
Recensione:
Indirizzi per estratti:
Indirizzo: Xu, WJ Hunan Univ, Dept Chem & Chem Engn, Changsha 410082, Peoples R ChinaHunan Univ Changsha Peoples R China 410082 10082, Peoples R China
Citazione:
W.J. Xu et al., "Manufacture of modified poly(vinyl acetal) showing fluorescence and molecular recognition", J APPL POLY, 73(12), 1999, pp. 2385-2390

Abstract

Poly(vinyl acetal) from poly(vinyl alcohol) and 4-dimethylaminobenzaldehyde (DMAB) is synthesized. Fluorescence behavior of the polymer is investigated in acetic acid glacial (HAc), dimethylsulfoxide (DMSO), and dimethylformamide (DMF) solvents. Fluorescence emission intensities of the polymer solutions are different with the change of concentration. The result suggests that the maximum fluorescence emission intensities of the polymer solutions depend on the optimal concentration of the polymer. It has been found that the fluorescence intensity of DMAB is dramatically lower than that of the polymer in the same chromophore concentration, and such phenomenon is termedas structural self-quenching effect (SSQE). The strong fluorescence of thepolymer can be quenched by adding electron-deficient monomers which have no chromophore moieties such as lactic acid, adenine, etc., and their Stern-Volmer constants are determined. It is observed that the higher the electron deficiencies of the quenchers, the higher the Stern-Volmer constants, which means stronger quenching effect. The result indicates that the polymer can recognize these biologic small molecules. (C) 1999 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 13:36:35