Synthesis and photochromic properties of new bisthienylethene derivatives and a copolymer

Advanced Materials

Volumn 12, Issue 21, 2000, Pages 1597-1600

  Tian, He ^a   Tu, Hai Yang ^a  

^a EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY   (China)

Author keywords

[No Author keywords available]

Indexed keywords

CRYSTALLIZATION; OPTICAL DATA PROCESSING; PHOTOCHROMISM; SWITCHING; SYNTHESIS (CHEMICAL);

PHOTOCHROMIC MOLECULAR SWITCHES; QUANTUM YIELDS; SWITCHING STABILITY; WAVELENGTH ABSORPTION;

COPOLYMERS;

EID: 0034315810     PISSN: 09359648     EISSN: None     Source Type: Journal    
DOI: 10.1002/1521-4095(200011)12:21<1597::AID-ADMA1597>3.0.CO;2-Q     Document Type: Article

References (17)

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11. In addition, the copolymerization between 4 and styrene did not take place. We tried copolymerizing 4 with different molar contents of MMA. However, the molar content of the monomer 4 was not higher than 1 % in the copolymer. Of particular concern is that the allyl functionality might provide an effective site for chain transfer processes. Under such circumstances one might expect the compound 4 monomer to be incorporated as a terminal group. This would clearly place an upper limit on the loading of 4 within a high molecular weight polymer matrix. When the N-substituents in the maleic imide are an allyl methacrylate, one might expect the content of photochromic monomer to increase substantially. Work in this direction is in progress.
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17. One optical switching cycle in the study was defined as follows: the film sample was irradiated with 500-538 nm light for 5 min then exposed to UV light of 365 nm for 5 min.