CHAPTER 5: Protection of Triplet Excited State Materials from Oxygen Quenching and Photooxidation in Optical Sensing Applications

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Abstract

Triplet excited states quenching by molecular oxygen is widely applied in optical sensing techniques. Such oxygen sensors often show inadequate performance when measuring high concentrations of oxygen. Adjustment of quenching rates with respect to particular applications is essential to keep the accuracy and dynamic range of the method. In addition, protection of the sensor material from photochemically generated reactive singlet oxygen is required. In this chapter different approaches for controlling oxygen quenching rates and photooxidation of the phosphorescent materials in oxygen sensing applications are discussed. Passive protection, based on limiting the diffusion of oxygen diffusion to the excited states, and active protection, employing oxygen-scavenging species, are compared. The performance of different approaches and examples of applications in oxygen sensing are outlined.

Original languageEnglish
Title of host publicationQuenched-phosphorescence Detection of Molecular Oxygen
Subtitle of host publicationApplications in Life Sciences
EditorsDmitri B. Papkovsky, Ruslan I. Dmitriev
PublisherRoyal Society of Chemistry
Pages91-116
Number of pages26
Edition11
ISBN (Electronic)9781788011754
DOIs
Publication statusPublished - 2018

Publication series

NameRSC Detection Science
Number11
Volume2018-January
ISSN (Print)2052-3068
ISSN (Electronic)2052-3076

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