Photoresponsive membranes incorporating 6-X-1',3',3'-trimethylspiro-(2H-1-benzopyran-2,2'-indolines) (6-X-BIPS), with X equals H, OH, Br, NO2 and 1',3',3'-trimethylspiro-(2H-1-naphthopyran-2,2'-indoline) (NIPS), supported by cellulose 2,4-diacetate, have been prepared. Membrane potentials, while irradiated by visible and UV light alternatively, in a pH range between 0. 5 and 10, were found to depend not only on the photochemical equilibrium between 'closed' and 'open' forms of 6-X-BIPS, but also on pH. Isoelectric points of membranes, which substantially coincide with zero point charge of 6-X-BIPS, were found to be independent of X substituents.

PHOTORESPONSIVE MEMBRANES INCORPORATING 6-SUBSTITUTED 1',3',3'-TRIMETHYLSPIRO-(2H-1-BENZOPYRAN-2,2'-INDOLINES) / I.R. Bellobono, B. Marcandalli, E. Selli, S. Calgari. - In: PHOTOGRAPHIC SCIENCE AND ENGINEERING. - ISSN 0031-8760. - 28:4(1984), pp. 162-165.

PHOTORESPONSIVE MEMBRANES INCORPORATING 6-SUBSTITUTED 1',3',3'-TRIMETHYLSPIRO-(2H-1-BENZOPYRAN-2,2'-INDOLINES)

I.R. Bellobono
Primo
;
E. Selli
Penultimo
;
1984

Abstract

Photoresponsive membranes incorporating 6-X-1',3',3'-trimethylspiro-(2H-1-benzopyran-2,2'-indolines) (6-X-BIPS), with X equals H, OH, Br, NO2 and 1',3',3'-trimethylspiro-(2H-1-naphthopyran-2,2'-indoline) (NIPS), supported by cellulose 2,4-diacetate, have been prepared. Membrane potentials, while irradiated by visible and UV light alternatively, in a pH range between 0. 5 and 10, were found to depend not only on the photochemical equilibrium between 'closed' and 'open' forms of 6-X-BIPS, but also on pH. Isoelectric points of membranes, which substantially coincide with zero point charge of 6-X-BIPS, were found to be independent of X substituents.
polymers; membranes
Settore CHIM/02 - Chimica Fisica
Article (author)
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

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: http://hdl.handle.net/2434/189765
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? ND
social impact