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Titolo:
Sol-gel preparation and photophysical properties of pseudo-interpenetrating polymer networks based on poly(3-alkylthiophene)/polysiloxane glass
Autore:
de Souza, JM; Brondani, DJ; Maior, RMS; de Azevedo, WM;
Indirizzi:
Univ Fed Pernambuco, Dept Quim Fundamental CCEN, UEPE, BR-50670901 Recife,PE, Brazil Univ Fed Pernambuco Recife PE Brazil BR-50670901 BC0901 Recife,PE, Brazil Univ Fed Pernambuco, Dept Farm, UEPE, BR-50670901 Recife, PE, Brazil Univ Fed Pernambuco Recife PE Brazil BR-50670901 BC901 Recife, PE, Brazil
Titolo Testata:
JOURNAL OF NON-CRYSTALLINE SOLIDS
fascicolo: 1-3, volume: 273, anno: 2000,
pagine: 170 - 174
SICI:
0022-3093(200008)273:1-3<170:SPAPPO>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
OPTICAL NONLINEARITY; THERMOCHROMISM; POLYTHIOPHENE; TEMPERATURE; CHAIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: de Azevedo, WM Univ Fed Pernambuco, Dept Quim Fundamental CCEN, UEPE, Cidade Univ, BR-50670901 Recife, PE, Brazil Univ Fed Pernambuco Cidade Univ Recife PE Brazil BR-50670901 BC
Citazione:
J.M. de Souza et al., "Sol-gel preparation and photophysical properties of pseudo-interpenetrating polymer networks based on poly(3-alkylthiophene)/polysiloxane glass", J NON-CRYST, 273(1-3), 2000, pp. 170-174

Abstract

In this work poly(3-hexadecylthiophene) (P3HDT) was dispersed in a polysiloxane polymer network and in a hybrid organic inorganic copolymer network polysiloxane/(3-mercaptopropyl)trimethoxysilane (3MPTMOS) using the sol-gel process. Spectroscopic analysis in the ultraviolet-visible region as a function of temperature shows that the tetraethoxysilane/poly(3-hexadecylthiophene) (TEOS/P3HDT) pseudo-interpenetrating polymer network (pseudo-IPN) has emission band centered at 5400 +/- 75 Angstrom at 25 degrees C which we attribute to P3HDT. At 100 degrees C this emission band intensity decreases byalmost half and has blue shift to 5000 +/- 100 A. As the temperature is further increased an increase in the intensity of this 5000 +/- 100 A band isobserved. On the other hand the TEOS-3MPTMOs/P3HDT pseudo-IPN has an emission maximum at 5000 +/- 100 A at 25 degrees C and instead of a blue shift an unusual red shift to 5800 +/- 100 A is observed as the temperature increases. Using sol-gel processing techniques we have prepared a new type of luminescent glass composite with luminescence properties covering a region of the visible spectrum from 4000 to 7000 Angstrom. The control of the electronic and optical properties we explain by the interaction and geometric restriction imposed by the inorganic host matrix together with the thermochromic properties of P3HDT. (C) 2000 Elsevier Science B.V. All lights reserved.

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Documento generato il 22/09/20 alle ore 14:27:51