Development of optical chemosensors based on photochromic polymer nanocarriers

Abstract

Development of optical chemosensors for photosensing of polarity and pH of aqueous media has been an interesting research area. Application of light-responsive polymer nanoparticles containing photochromic or fluorescent compounds is...

Controlled long-term sustained release of poly(lactic acid) composite microspheres with dual-responsive cellulose nanocrystals

“…This trend may be due to the different degrees of deprotonation of the tertiary amine group of the PDMAEMA chain in C-PMA under different pH conditions. 22 It is noteworthy that the size of the polymer suddenly increases when the pH reaches 8, due to the pH being close to the isoelectric point (IEP) of the polymer colloidal particles. As a result, the particles have no net charge and therefore become more easily aggregated into disordered states.…”

Synthesis and Study of the Optical Properties of a Conjugated Polymer with Configurational Isomerism for Optoelectronics

“…There is only one report of polymers with the quinoline sequenced in the backbone and with photoisomerism, but in that case, it causes a hypsochromic shift [ 73 ], whereas PBQT shows a bathochromic shift, which allows its possible use as a colorimetric or fluorimetric sensor. Its optical bandgap of 1.63 to 1.58 eV broadens the range of potential applications for this material, such as chemosensors [ 74 ], photoswitches [ 67 ], smart biomaterials [ 75 ], environmental applications [ 76 , 77 ], and optoelectronic devices in general [ 78 , 79 ]. In all these areas, both the absorption and emission properties of PBQT could have profited.…”

Development of Spiropyran Immobilization and Characterization Protocols for Reversible Photopatterning of SiO2 Surfaces

“…As a result, the SP form is hydrophobic and colorless and the MC form is hydrophilic and purple, exhibiting enhanced intermolecular interactions and increased solubility in polar solvents. In addition, only the MC form is reported to be fluorescent, and its intensity could be improved by solvent polarity, pH, or incorporation into nanoporous frameworks. − Leveraging these versatile features, spiropyran and its derivative have been employed as chemosensors for detecting pH, , solvent polarity, CO 2 gas, Cu 2+ ions, and aniline pollutants . Their unique capability to distinctly respond to single or multiple stimuli positions them as ideal candidates for orthogonal sensing systems, utilizing unified colorimetric or fluorometric detection methods. − …”