Fast Switching Immobilized Photochromic Dyes

Nino Malic; Jonathan Campbell; Ali Abdelselam; Craig Francis; Richard Evans

doi:10.1002/pola.24461

Fast Switching Immobilized Photochromic Dyes

Nino Malic, Jonathan Campbell, Ali Abdelselam, Craig Francis, Richard Evans

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	476-486
Number of pages	11
Journal	Journal of Polymer Science Part A: Polymer Chemistry
Volume	49
Issue number	2
DOIs	https://doi.org/10.1002/pola.24461
Publication status	Published - 15 Jan 2011

Keywords

branched
matrix
photochromic dyes
polydimethylsiloxane
polysiloxanes
tethering
Y-branched

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10.1002/pola.24461

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T1 - Fast Switching Immobilized Photochromic Dyes

AU - Malic, Nino

AU - Campbell, Jonathan

AU - Abdelselam, Ali

AU - Francis, Craig

AU - Evans, Richard

PY - 2011/1/15

Y1 - 2011/1/15

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AB - 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.

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KW - polydimethylsiloxane

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JO - Journal of Polymer Science Part A: Polymer Chemistry

JF - Journal of Polymer Science Part A: Polymer Chemistry

IS - 2

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Fast Switching Immobilized Photochromic Dyes

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