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27 August 2003 Immobilization of porphyrins in hydrogels for optical sensing
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This paper describes a new method for the immoblization of metalloporphyrin molecules for optical oxygen sensing. The porphyrin molecules have an acrylamide group attached allowing the porphyrin indicator to be covalently bound within a hydrogel polymer. Two hydrogel monomers: hydroxyethylmethylacrylamide (HEMA) and acrylamide have been investigated to assess their suitability as host polymers for the porphyrins. The photophysics of both the base and Platinum porphyrin: tetra porphyrin are discussed. Platinum tetra porphyrin bound in a hydrogel polymer using HEMA as the monomer unit was found to have a good sensitivity to oxygen.
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A. Sheila Holmes-Smith, David Bailly, Mahesh Uttamlal, and Michael Campbell "Immobilization of porphyrins in hydrogels for optical sensing", Proc. SPIE 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications, (27 August 2003); doi: 10.1117/12.463988;

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