Article open access publication

Robust optical oxygen sensors based on polymer-bound NIR-emitting platinum( ii )–benzoporphyrins

Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), ISSN 2050-7534

Volume 2, 36, 2014

DOI:10.1039/c4tc00983e, Dimensions: pub.1031731620,



  1. (1) University of Oxford, grid.4991.5
  2. (2) Graz University of Technology, grid.410413.3
  3. (3) University of Copenhagen, grid.5254.6, KU


United Kingdom






New high performance optical oxygen sensing materials based on NIR-emitting indicators covalently bound to various polymers overcome main limitations of the conventional sensors.

Several advanced optical oxygen sensor materials are presented. They are based on bright NIR-emitting platinum( ii )–benzoporphyrins covalently incorporated into a variety of polymeric matrices. The dye–polymer conjugates are prepared either via Suzuki coupling of the brominated porphyrins to the styrene backbone or via co-polymerisation of the monomers with monostyryl porphyrin derivative. Importantly, in both strategies a highly stable C–C bond is obtained. The resulted materials benefit from excellent photophysical properties of the benzoporphyrin dyes (high brightness, emission in the NIR part of the spectrum) and high stability of the covalently grafted materials due to complete suppression of dye migration and leaching. This is demonstrated to be particularly important for operation of the sensors in harsh conditions e.g. during steam sterilization where the materials based on non-covalently grafted dyes showed significant drift of their calibration. Additionally, we present a new synthetic method for preparation of analytically pure benzoporphyrins via simple 1-step template condensation which a promising alternative to the commonly used Lindsey method.


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Research area: Medicine

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2015: Level 1

Research area: Medicine

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Times Cited: 29

Field Citation Ratio (FCR): 4.43

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