Optical phase conjugation and photoisomerization of novel polyester films functionalizied by nitroazobenzene with push pull structures
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Received Date:
1996-04-10
Accepted Date:
1996-05-22
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Abstract
The optical phase conjugation and photoisomerization of some films of two kinds of polyesters functionalizied by 4-bis(N,N hydroxyethylene)-imino-4-nitroazobenzene have been studied.The photoresponsive mechanism of these films was explained quite well by a model of four-level energy system,which was consisting of two pairs of siglet states of trans and cis isomers,respectively.Photoismerization was the main intramolecular relaxtion between both two-level energy systems.Investigation on effects of pump intensities,polyester structures and thicknees of films has been also carried out.
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