Water Soluble Fluorescent Sensors for Cations
Presentation Type
Poster
Faculty Advisor
Saliya Desilva
Access Type
Event
Start Date
26-4-2024 11:15 AM
End Date
26-4-2024 12:15 PM
Description
Our research is focused on developing new water soluble fluorescent sensors for cations. Most fluorescent sensors for cations have a very low solubility in water as they have large organic chromophores like anthracenes. Cation binding studies of these sensors are typically carried out in methanol-water mixtures. We have attached a methylimidazole group to a fluorescent proton sensor to develop an ionic liquid based fluorescent sensor that is water soluble. These sensors generate or quench a fluorescence signal with cation binding due to photoinduced electron transfer (PET) between the chromophore and the receptor. Our sensor is not fluorescent at high pH because of PET from a tertiary nitrogen to an anthracene. It is fluorescent at low pH as PET is blocked by protonation of the nitrogen atom. Preliminary results of our study of the new sensor will be presented.
Water Soluble Fluorescent Sensors for Cations
Our research is focused on developing new water soluble fluorescent sensors for cations. Most fluorescent sensors for cations have a very low solubility in water as they have large organic chromophores like anthracenes. Cation binding studies of these sensors are typically carried out in methanol-water mixtures. We have attached a methylimidazole group to a fluorescent proton sensor to develop an ionic liquid based fluorescent sensor that is water soluble. These sensors generate or quench a fluorescence signal with cation binding due to photoinduced electron transfer (PET) between the chromophore and the receptor. Our sensor is not fluorescent at high pH because of PET from a tertiary nitrogen to an anthracene. It is fluorescent at low pH as PET is blocked by protonation of the nitrogen atom. Preliminary results of our study of the new sensor will be presented.