Multiresponsive Behavior of Functional Poly(p-phenylene vinylene)s in Water

Abstract

Abstract:The multiresponsive behavior of functionalized water-soluble conjugated polymers (CPs) is presented with potential applications for sensors. In this study, we investigated the aqueous solubility behavior of water-soluble CPs with high photoluminescence and with a particular focus on their pH and temperature responsiveness. For this purpose, two poly(phenylene vinylene)s (PPVs)-namely 2,5-substituted PPVs bearing both carboxylic acid and methoxyoligoethylene glycol units-were investigated, with different amount of carboxylic acid units. Changes in the pH and temperature of polymer solutions led to a response in the fluorescence intensity in a pH range from 3 to 10 and for temperatures ranging from 10 to 85 • C. Additionally, it is demonstrated that the polymer with the largest number of carboxylic acid groups displays upper critical solution temperature (UCST)-like thermoresponsive behavior in the presence of a divalent ion like Ca 2+ . The sensing capability of these water-soluble PPVs could be utilized to design smart materials with multiresponsive behavior in biomedicine and soft materials.

Optical Properties and Amplified Spontaneous Emission of Novel MDMO-PPV/C500 Hybrid

“…Similar to inorganic semiconductors, CPs are considered unique photonic materials that combine their mechanical and structural properties together with the optoelectric characteristics of materials [5,6]. During the last two decades, the application of CPs has been widely reported in several optoelectronic devices such as: sensors [7,8], solar cells [1,9], light emitting electrochemical cells [10,11], and light emitting diodes [12,13]. Moreover, conducting CPs have been utilized as lasers and gain media for optical amplifiers with tunable features in the visible range of the electromagnetic spectrum [14,15,16].…”

Stimuli Responsive Polymeric Systems for Cancer Therapy

“…Ryskulova and colleagues investigated the potential of a pH and temperature dual-responsive system comprised of poly(phenylene vinylene)s (PPVs) having both carboxylic acid and methoxyoligoethylene glycol pendant groups [ 99 ]. The fluorescence intensity is affected by change pH in a range from 3 to 10 and temperatures from 10 °C to 85 °C [ 99 ].…”

Addressing Multiple Ions Using Single Optical Probe: Multi‐Color Response via Mutually Independent Sensing Pathways

“…So, there exists a genuine need for developing a highly sensitive probe for fluoride in water with less response time. Notably, p ‐phenylenevinylene based molecules have been widely appreciated over the years in designing efficient optoelectronic devices and energy harvesting materials due to good photo stability, high quantum yield and large stoke shifts . However, the presence of huge aromatic residue often restricts solubility of these probes in aqueous medium, which eventually limits their applications as optical biosensor.…”