Maps intracellular polarity using a fluorescent probe, revealing cell health information.
The intracellular microenvironmental properties are important parameters for understanding cellular health status. Herein, we report a polarity-sensitive indoline-based fluorescent probe (PPOH) for determining intracellular micropolarity. A quantitative estimate of the local polarity was obtained through extensive spectroscopic investigations. The fluorescence lifetime follows a linear relationship with solvent polarity. This property of PPOH enabled us to map the heterogeneous subcellular environment using fluorescence lifetime imaging microscopy.
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Dutta et al. (2026) studied this question.
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