Color Changing Cholesteric Polymer Films Sensitive to Amino Acids

Chiral hydrogen-bonded polymer films that respond to the presence of some amino acids (arginine, lysine, histidine) in water by changing the color and shifting the wavelengths of the selective reflection band (SRB) were synthesized and studied. The kinetics of the film's response depends on the...

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Bibliographic Details
Published in:Macromolecules 2006-06, Vol.39 (12), p.3986-3992
Main Authors: Shibaev, Peter V, Chiappetta, Daniel, Sanford, R. Lea, Palffy-Muhoray, Peter, Moreira, M, Cao, W, Green, Mark M
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Laser materials
Optical materials
Optics
Physicochemistry of polymers
Physics
Polymerization
Polymers and radiations
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Summary:Chiral hydrogen-bonded polymer films that respond to the presence of some amino acids (arginine, lysine, histidine) in water by changing the color and shifting the wavelengths of the selective reflection band (SRB) were synthesized and studied. The kinetics of the film's response depends on the concentration of donor/acceptor groups in the polymer matrix. A higher concentration of hydrogen-bonded groups results in a faster shift of the SRB and color changes. This effect is explained in terms of structural changes and the breakage of hydrogen bonds that occurs between the components of a cholesteric polymer, immersed in various aqueous solutions of amino acids. Optical pumping of cholesteric films doped with laser dyes leads to lasing. The changes in the selective reflection induced by amino acids in water solutions result in a shift of the lasing wavelength.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma052046o