%0 Journal Article %T Fluorescent styrenes for mitochondrial imaging and viscosity sensing. %A Singh D %A Ghorpade M %A Regar R %A Collot M %A Soppina V %A Kanvah S %J Photochem Photobiol %V 100 %N 4 %D 2024 Jul-Aug 22 %M 38385897 %F 3.521 %R 10.1111/php.13910 %X Fluorophores bearing cationic pendants, such as the pyridinium group, tend to preferentially accumulate in mitochondria, whereas those with pentafluorophenyl groups display a distinct affinity for the endoplasmic reticulum. In this study, we designed fluorophores incorporating pyridinium and pentafluorophenyl pendants and examined their impact on sub-cellular localization. Remarkably, the fluorophores exhibited a notable propensity for the mitochondrial membrane. Furthermore, these fluorophores revealed dual functionality by facilitating the detection of viscosity changes within the sub-cellular environment and serving as heavy-atom-free photosensitizers. With easy chemical tunability, wash-free imaging, and a favorable signal-to-noise ratio, these fluorophores are valuable tools for imaging mitochondria and investigating their cellular processes.