A novel photochromic dye conjugate architecture is described, which allows both covalent tethering to a polymeric host matrix and fast photochromic switching. The new conjugates consist of a photochromic dye covalently bound to two different substituents via a Y-branching linker (hetero Y-branching), one being a polymerizable methacrylate moiety and the other a soft (low T g) poly(dimethylsiloxane) oligomer. The novel conjugates gave faster photochromic decoloration in the host lens matrix compared with the electronically equivalent nonmatrix-bound and unconjugated parent control dyes. In addition, further acceleration of fade speed kinetics was observed with a longer linker between photochromic dye and methacrylate moiety.
|Number of pages||11|
|Journal||Journal of Polymer Science Part A: Polymer Chemistry|
|Publication status||Published - 15 Jan 2011|
- photochromic dyes