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Titolo:
Synthesis of new photoresponsive polyesters containing norbornadiene residues by the polyaddition of donor-acceptor norbornadiene dicarboxylic acid diglycidyl ester with dicarboxylic acids and their photochemical properties
Autore:
Konno, Y; Kameyama, A; Nishikubo, T; Nagai, T;
Indirizzi:
Kanagawa Univ, Fac Engn, Dept Appl Chem, Yokohama, Kanagawa 2218686, JapanKanagawa Univ Yokohama Kanagawa Japan 2218686 ma, Kanagawa 2218686, Japan Daikin Environm Lab Ltd, Tsukuba, Ibaraki 3050841, Japan Daikin Environm Lab Ltd Tsukuba Ibaraki Japan 3050841 raki 3050841, Japan
Titolo Testata:
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
fascicolo: 16, volume: 39, anno: 2001,
pagine: 2683 - 2690
SICI:
0887-624X(20010815)39:16<2683:SONPPC>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAIN-CHAIN; MOIETIES; POLYMERS; BIS(EPOXIDE)S;
Keywords:
norbornadiene; quadricyclane; donor-acceptor norbornadiene; polyaddition; photochemical reaction; stored energies;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Nishikubo, T Kanagawa Univ, Fac Engn, Dept Appl Chem, Yokohama, Kanagawa 2218686, Japan Kanagawa Univ Yokohama Kanagawa Japan 2218686 2218686, Japan
Citazione:
Y. Konno et al., "Synthesis of new photoresponsive polyesters containing norbornadiene residues by the polyaddition of donor-acceptor norbornadiene dicarboxylic acid diglycidyl ester with dicarboxylic acids and their photochemical properties", J POL SC PC, 39(16), 2001, pp. 2683-2690

Abstract

A donor-acceptor norbornadiene derivative, 5-(4-methoxyphenyl)-1,4,6,7,7-pentamethyl-2,5-norbornadiene-2,3-dicarboxylic acid diglycidyl ester (D-A NDGE), was synthesized by the reaction of the cesium salt of 5-(4-methoxyphenyl)-1,4,6,7,7-pentamethyl-2,5-norbomadiene-2,3-dicarboxylic acid with epibromohydrin in N-methyl-pyrrolidone (NMP). The polyaddition reactions of D-A NDGE with certain dicarboxylic acids were carried out with tetrabutylammonium bromide as a catalyst in NMP, producing corresponding polyesters containing D-A norbornadiene (NBD) residues in the main chain in fair to good yields. The photoisomerization of the D-A NBD residues in the polyesters proceeded very smoothly, forming the corresponding quadricyclane groups. The photoreactivities of the D-A NBD residues in the polymer were 50 times higher than those of the NBD residues in the film state and 60 times higher than those in a tetrahydrofuran solution. The stored energy in the quadricyclane groups of the polymers was about 45-55 kJ/mol according to differential scanning calorimetry analysis of the irradiated polymer films. (C) 2001 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 14:59:23