Citation: . POLYMER SCAFFOLDS BEARING AZOBENZENE-POTENTIAL FOR OPTICAL INFORMATION STORAGE[J]. Chinese Journal of Polymer Science, ;2001, 19(2): 147-153. shu

POLYMER SCAFFOLDS BEARING AZOBENZENE-POTENTIAL FOR OPTICAL INFORMATION STORAGE

Received Date: 1 September 2000

The fundamental optical storage mechanism of the laser light eddressable azobenzene moiety is briefly introduced.A modular and flexible synthesis design furnishes polyester matrices covalently integrating cyanoazobenzene in regularlyspaced side chains. Thin films of these materials are particularly well suited for holographic storape. Notable figures of meritsof liquid crystalline polyesters are response time to blue-green laser light of the order of nanoseconds, storage capacityexpressed as 5000 lines/mm, and high,permanent(almost nine years)diffraction efficiency of the order of 50% or greater,and erasability.The implications of the main chain nature for polyester morphology and for the permanency of the induced anisotropy are discussed.The design and methods of preparation of other significantly different polymer scaffolds supporting cyanoazobenzene are elaborated.Oligopeptides always result in amorphous materials,whereas copolymerthacrylates and dendritic or hyperbranched polyesters provide some materials that exhibit liquid crystallinity.However,none of these scaffolds affords materials that result in permanent anisotropy when exposed to interfering laser light.
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