Positive Luminescent Sensor for Aerobic Conditions Based on Polyhedral Oligomeric Silsesquioxane Networks

Abstract

There are numerous numbers of hypoxia-selective luminescent probes based on oxygen quenching of phosphorescence. We show a unique design for luminescent probes to detect hyperoxia utilizing hybrid networks consisting of aggregation-induced emission(AIE)-active dyes and disulfide linkers. At the initial state, emission from the AIE-active dyes is inducible by suppressing energy-consumable intramolecular motions in the hybrid matrices, while the decrease in intensity was detected by releasing molecular motions corresponded to bond scission at the disulfide linkers. Particularly, it was shown that this process selectively proceeds in hypoxia. As a result, positive luminescent signals were obtained in hyperoxia.

Keywords

Polyhedral oligomeric silsesquioxane(POSS) / Network polymer / Hypoxia / Luminescent probe

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