BIOLOGICALLY DERIVED PHOTOACTIVE MACROMOLECULAR AZODYES

• Published in: Journal of macromolecular science. Part A, Pure and applied chemistry Vol. 38; no. 12; pp. 1355 - 1370
• Main Authors: Liu, Wei, Lee, Soo-Hyuong, Yang, Suizhou, Bian, Shaoping, Li, Lian, Samuelson, Lynne A., Kumar, Jayant, Tripathy1†, Sukant K.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Colchester Taylor & Francis Group 01-01-2001; Taylor & Francis
• Subjects: Applied sciences; Azopolymer; Catalysis; Chromophores; Enzymatic polymerization; Enzymes; Exact sciences and technology; Fourier transform infrared spectroscopy; Isomerization; Macromolecules; Nuclear magnetic resonance spectroscopy; Organic polymers; Peroxidase; Physicochemistry of polymers; Polymerization; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; Substitution reactions; Surface relief gratings; Chemical solution; Patterning; Regioselectivity; Enzymatic catalysis; Photoinduced effect; Experimental study; Functional polymer; Lateral group; Absorption spectrum; Thermal stability; Azo compound; Sulfonate polymer; Light sensitive polymer; Phenylene derivative polymer; Phenols; Polyacid; Oxidative polymerization
• ISSN: 1060-1325; 1520-5738
• DOI: 10.1081/MA-100108390

Azophenols with various substituents at the para position of the phenyl ring were enzymatically polymerized in the presence of H
2
O
2
. Structural characterization of the synthesized polymers by FTIR, FT-Raman, and NMR (
1
H and
13
C) spectroscopy confirms our previous observation that this enzymatically catalyzed coupling reaction occurs primarily at the ortho positions, with some substitution at the meta position of the phenol ring. The strong constraint and poor packing of the azobenzene chromophores in the polymer leads to a significant blue shift of the π-π
*
transition absorption and slow photoisomerization and thermal relaxation in comparison to the monomers. Surface relief gratings (SRG) with large surface modulation have been fabricated on these enzymatically synthesized polymer films.
†
Deceased.