Ratiometric Optical pH Sensor Based on Photoresponsive Polymers

Developing sensitive and reliable optical sensors for pH detection is essential in various fields, frommedicine to environmental monitoring. This study presents a novel pH-sensitive fluorescentcopolymer, P(NIPAM-co-RBAC), which was synthesized using reversible addition-fragmentationchain transfer (RAFT) polymerization. Rhodamine B acrylate (RBAC) was used as thephotoresponsive unit. Fluorescence spectroscopy revealed that P(NIPAM-co-RBAC) solutionsexhibit a distinct response to pH changes. The emission intensity shows a strong peak at around ۵۹۰nm and a ratiometric decrease with increasing pH. This response can be accurately described by alinear relationship, highlighting the potential of P(NIPAM-co-RBAC) as a reliable and potentiallyadvantageous optical pH sensor.

کلیدواژه ها:

Smart polymer ، Sensor ، pH-Responsive ، Fluorescent Copolymer