"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

KINETICS OF THE PHOTOCHROMIC REACTION IN A POLYMER CONTAINING AZOBENZENE GROUPS

I. Mancheva1, I. Zhivkov2,* , S. Nešpurek3

Affiliation

  1. Central Laboratory of Optical Storage and Processing of Information, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 101, 1113 Sofia, Bulgaria
  2. Central Laboratory of Photoprocesses, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl. 109, 1113 Sofia, Bulgaria
  3. Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovský Sq. 2, 162 06 Prague 6, Czech Republic

Abstract

Thermal trans-cis isomerization of photochromic 4-[4-(6-hydroxy-hexyloxy)phenylazo] benzonitrile chromophore copolymerised with methylmethacrylate was investigated by isothermal kinetic measurements. A non-exponential relaxation in the solid phase was found, related to a distribution of the constants of the process, while the relaxation in solution followed an exponential decay. The activation energy Ea = 89 kJ/mol and frequency factor ν0 = 1 × 1011 Hz were determined from the experimental data..

Keywords

Photochromism, Azobenzene, Relaxation properties.

Submitted at: Dec. 9, 2004
Accepted at: Jan. 26, 2005

Citation

I. Mancheva, I. Zhivkov, S. Nešpurek, KINETICS OF THE PHOTOCHROMIC REACTION IN A POLYMER CONTAINING AZOBENZENE GROUPS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 1, pp. 253-256 (2005)