Accession Number : ADA296606

Title :   Azo Polymers for Reversible Optical Storage. 8. The Effect of the Polarity of the Azobenzene Groups.

Descriptive Note : Technical rept.,

Corporate Author : QUEEN'S UNIV KINGSTON (ONTARIO) DEPT OF CHEMISTRY

Personal Author(s) : Ho, M. S. ; Barrett, C. ; Natansohn, A. ; Rochon, P.

PDF Url : ADA296606

Report Date : 21 APR 1995

Pagination or Media Count : 23

Abstract : Poly4-(2-METHACRYLOYLOXY)ETHYLethylaminoazobenzene (pMAEA) was prepared. Its reversible optical storage properties were studied and compared with the properties of previously reported poly(4-(2-(methacryloyloxy)ethyl-azobenzene (pMEA) and poly - nitrophenyl-4'-(2-(METHACRYLOYLOXY)ETHYL ethylamino phenyl diazene (pDR1M). The effect of the dipole moment of the azobenzene moiety in the optical storage properties was studied by comparing the photochemically induced birefringence "writing" and "relaxation" behaviours. The writing and relaxation rates are both in the order pDR1M > pMAEA> pMEA. In addition, pDR1M, which contains donor-acceptor substituents in the azobenzene side chain, exhibits the highest saturation level of optically induced birefringence. The fraction of birefringence conserved after relaxation is lowest for pMEA, which has no donor/acceptor substitutents in the azobenzene side chain, and highest for pDR1M. jg

Descriptors :   *POLYMERS, *REVERSIBLE, *OPTICAL STORAGE, *POLARITY, OPTICAL PROPERTIES, RATES, SATURATION, BIREFRINGENCE, ELECTRON DONORS, RELAXATION, AZOBENZENES, ELECTRON ACCEPTORS, WRITING, ETHYL RADICALS, DIPOLE MOMENTS, DIAZO COMPOUNDS.

Subject Categories : Polymer Chemistry
      Organic Chemistry
      Electrooptical and Optoelectronic Devices
      Computer Hardware
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE