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Updated: May 27, 2025

Synthesis and Calibration of Phosphorescent Nanoprobes for Oxygen Imaging in Biological Systems
Published on: March 3, 2010
Phenoxazine-based covalent organic frameworks as a turn-off fluorescent probe for trace water detection in organic
Fengmin Cui1, Yingdi Zhang1, Benhai Liu1
1Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China. ias_ydu@njtech.edu.cn.
Abstract:
Phenoxazine-based COFs (TFPB-DAPO-COF and TFPT-DAPO-COF) were synthesized and exhibited wider characteristic intramolecular charge transfer (ICT) than parent phenoxazine. Phenoxazine-based COFs can form hydrogen bonds with water molecules in aprotic solvents, weakening the ICT effect, and leading to a proportional decrease in fluorescence intensity. Therefore, DAPO-COFs can be used as a tool for the detection of water molecules. Among them, TFPT-DAPO-COF shows faster and higher selective response to water on a molecular level in THF with low detection limit (0.0656% v/v).
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