Luminophore charge effects in water-based oxygen sensor films

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Journal titleJournal of Photochemistry and Photobiology A: Chemistry
Pages8894; # of pages: 7
AbstractThe neutral luminophore [Ir(ppy)2(fppy)], where fppy = 4-(2-pyridyl)benzaldehyde and ppy = 2-phenylpyridine were prepared and bound to the water soluble amine-functionalized polymer Silamine D208-EDA by either reductive amination or coupling reactions. Pressure sensitive paint (psp) formulations were made by blending microcrystalline cellulose (MC) with these polymer-luminophores and the psp photophysical properties, oxygen sensitivities and luminescent microscopies were compared to psps made from the charged luminophore [Ir(fppy)2(t-Bu-iCN)2]CF3SO 3, where t-Bu-iCN = tert-butyl isocyanide, attached by reductive amination to Silamine D208-EDA. The excited-state lifetime for the neutral luminophore in psp blends was almost independent of MC concentration whereas those of the charge luminophore increased with MC concentration. The nearly 30% increase in oxygen sensitivity of psps made with the charged compared to neutral polymer luminophores is ascribed to the association of charged luminophores with polar groups on the surface of MC. © 2011 Elsevier B.V. All rights reserved.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); Aerospace (AERO-AERO)
Peer reviewedYes
NPARC number21271300
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Record identifierf36b05b1-e77f-4a68-ae34-34f952c109d4
Record created2014-03-24
Record modified2016-05-09
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