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Spiropyran‐Conjugated Pluronic as a Dual Responsive Colorimetric Detector
Author(s) -
Oh Yeon Jeong,
Nam Jeong A.,
AlNahain Abdullah,
Lee Sangkug,
In Insik,
Park Sung Young
Publication year - 2012
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201200416
Subject(s) - spiropyran , merocyanine , conjugated system , materials science , photochemistry , photochromism , benzophenone , fluorescence spectroscopy , micelle , polymer chemistry , chemistry , fluorescence , polymer , organic chemistry , optics , aqueous solution , physics
Novel spiropyran‐conjugated Pluronic [polyethylene oxide (PEO)‐b‐polypropylene oxide (PPO)‐b‐polyethylene oxide (PEO)] micelles are developed as a new colorimetric detector showing photo‐ or thermo‐switchable behavior. Facile conjugation of spiropyran to Pluronic was confirmed by 1 H NMR, UV–Vis, and Fluorescence spectroscopy. A switchable photoluminescence is found depending on the irradiation with either UV or visible light, and temperature resulting from structural isomerization of spiropyran between spiropyran (SP) and merocyanine (MC) form. Cytotoxicity of the spiropyran‐conjugated Pluronic (SP‐PL) was evaluated following an MTT assay, whereas photo responsiveness of spiropyran within the micelles was determined by confocal laser scanning microscopy.