Platinum (II) porphyrin-containing thermoresponsive poly(N- isopropylacrylamide) copolymer as fluorescence dual oxygen and temperature sensor

Xianfeng Zhou, Fengyu Su, Yanqing Tian, Roger H. Johnson, Deirdre Meldrum

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

A random copolymer, poly(NIPAAm-co-PtPorphyrin), consisting of N-isopropylacrylamide (NIPAAm) and platinum (II) porphyrin units, behaves as an optical dual sensor for oxygen and temperature. The dual sensor is designed by incorporating an oxygen-sensitive platinum (II) porphyrin (M1) into a temperature-sensitive polymer (PNIPAAm). The polymer exhibited low critical solution temperature (LCST) property at 31.5 °C. This LCST affected the polymer's aggregation status, which in turn affected the nanostructures, fluorescence intensities, and responses to dissolved oxygen. This enables the polymer to functionalize as a dual temperature and dissolved oxygen sensor. Oxygen response of the platinum (II) porphyrin probes in the polymer followed a two-site Stern-Volmer model, indicating the nonuniform distribution of the probes. The copolymer was used to preliminarily monitor the oxygen consumption of Escherichia coli (E. coli) bacteria. The results indicate a potential application of the polymer in biological fields.

Original languageEnglish (US)
Pages (from-to)135-141
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume159
Issue number1
DOIs
StatePublished - Nov 28 2011

Fingerprint

Oxygen sensors
Porphyrins
temperature sensors
Temperature sensors
Platinum
porphyrins
copolymers
Polymers
platinum
Copolymers
Fluorescence
fluorescence
sensors
polymers
oxygen
Oxygen
Dissolved oxygen sensors
Temperature
temperature
oxygen consumption

Keywords

  • Dual optical sensor
  • Oxygen sensor
  • Platinum porphyrin
  • Poly(N-isopropylacrylamide)
  • Temperature sensor

ASJC Scopus subject areas

  • Instrumentation
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Platinum (II) porphyrin-containing thermoresponsive poly(N- isopropylacrylamide) copolymer as fluorescence dual oxygen and temperature sensor. / Zhou, Xianfeng; Su, Fengyu; Tian, Yanqing; Johnson, Roger H.; Meldrum, Deirdre.

In: Sensors and Actuators, B: Chemical, Vol. 159, No. 1, 28.11.2011, p. 135-141.

Research output: Contribution to journalArticle

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