Abstract
This work is part of a research project whose final aim is to realise prototypes of bifunctional photochromic and electro-optical devices. The photochrome will be incorporated in films composed by nematic liquid crystals dispersed in a polymeric matrix or in fluid monomer emulsions. To choose suitable photochromic components, the behaviour of some compounds (four naphtho-spiro-indolino-oxazines and a nitromethoxy-spiropyran) was investigated in the components of the matrix (liquid crystals and monomers) and compared with that in organic solvents. The colour-forming and colour-bleaching kinetics were determined. The molecules investigated, while maintaining their photochromic behaviour, generally exhibited a better colorability in liquid crystals and monomers, due to decreasing of the bleaching rate. The results of this work indicate that two of the molecules investigated have the prerequisites of colorability, reversibility and durability to be used in the bifunctional devices. Preliminary tests on the behaviour of a prototype of bifunctional film are reported.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Photochemistry and Photobiology A: Chemistry
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
