Polymeric systems containing side-chain photoactive chromophores were prepared by free-radical copolymerization of N-vinylcarbazole with 4-methacryloyloxyazobenzene and 4-methacryloyloxy-4'-cyanoazobenzene. The resulting materials were characterized by size exclusion chromatography, TGA and DSC thermal analysis, FT-IR, H-1 NMR, UV-vis, and fluorescence spectroscopy and photoisomerization experiments. In all cases, the copolymer composition was almost independent of the feed composition, in agreement with the strong tendency of the investigated monomers to alternating copolymerization. Spectroscopic and thermal data clearly highlighted the occurrence of charge-transfer electronic interactions between electron-rich carbazole rings and electron-poor azobenzene chromophores. These interactions facilitate the trans-cis photoisomerization of azobenzene side-chains.

Photoactive Azobenzene Polymers Containing Carbazole Chromophores

ALTOMARE, ANGELINA;CIARDELLI, FRANCESCO;SOLARO, ROBERTO
2004-01-01

Abstract

Polymeric systems containing side-chain photoactive chromophores were prepared by free-radical copolymerization of N-vinylcarbazole with 4-methacryloyloxyazobenzene and 4-methacryloyloxy-4'-cyanoazobenzene. The resulting materials were characterized by size exclusion chromatography, TGA and DSC thermal analysis, FT-IR, H-1 NMR, UV-vis, and fluorescence spectroscopy and photoisomerization experiments. In all cases, the copolymer composition was almost independent of the feed composition, in agreement with the strong tendency of the investigated monomers to alternating copolymerization. Spectroscopic and thermal data clearly highlighted the occurrence of charge-transfer electronic interactions between electron-rich carbazole rings and electron-poor azobenzene chromophores. These interactions facilitate the trans-cis photoisomerization of azobenzene side-chains.
2004
Altomare, Angelina; Ciardelli, Francesco; Mellini, L.; Solaro, Roberto
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/184999
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 12
social impact