The preparation and properties of luminescent oxygen sensing materials based on two Pt(II)–porphyrin complexes: platinum meso-tetrakis(4-N-methylpyridyl)porphyrin (PtTMPyP4+) and platinum meso-tetrakis(4-N-pyridyl)porphyrin (PtTPyP) assembled in mesoporous silica (MCM-41) are described. The luminescence of Pt(II)–porphyrin/MCM-41 assembly materials can be extremely quenched by molecular oxygen with good sensitivity (I0/I100 > 7) and rapid response times (<1 s) suggest that the Pt(II)–porphyrin/MCM-41 system can be used for developing oxygen sensors. PtTMPyP4+/MCM-41 (20 mg g−1) exhibits very high sensitivity (I0/I100 > 50). Even when the concentration of oxygen is 1%, the luminescence intensity of PtTMPyP4+/MCM-41 (20 mg g−1) can be quenched by 83.33%.
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Zhang et al. (2005) studied this question.
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