2017
DOI: 10.1002/sia.6220
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Photo‐switchable spiropyran immobilized polystyrene beads using catechol chemistry

Abstract: Catechol and spiropyran functional groups were conjugated to a polymer backbone, allowing immobilization on polystyrene beads (PS beads). The final product was capable of stably reproducing the optical properties of spiropyran. Through the outstanding surface adhesion properties of the catechol functional group, spiropyran was immobilized on PS beads. Switchable photoluminescence in the spiropyran coated PS bead surfaces was observed depending on irradiation with either UV or visible light. The surfaces of the… Show more

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Cited by 10 publications
(4 citation statements)
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“…[ 48 ] In the case of the PS particles dispersed in water, a continuous absorbance decrease from visible to NIR region is observed. [ 49 ] Interestingly, when the PS particles were captured by the 3D‐PGNP surface, a new absorbance spectral feature was observed, including peaks at 520, 570, and 690 nm, which are considered to be derived from close‐packed or multistacked PS particles in the 3D‐PGNP. [ 50 ] The improved absorbance around the NIR region in the presence of PS is acceptable for additional resonance effect, which is closely related to the wavelength match of a laser beam and electronic transition wavelength of targets.…”
Section: Resultsmentioning
confidence: 99%
“…[ 48 ] In the case of the PS particles dispersed in water, a continuous absorbance decrease from visible to NIR region is observed. [ 49 ] Interestingly, when the PS particles were captured by the 3D‐PGNP surface, a new absorbance spectral feature was observed, including peaks at 520, 570, and 690 nm, which are considered to be derived from close‐packed or multistacked PS particles in the 3D‐PGNP. [ 50 ] The improved absorbance around the NIR region in the presence of PS is acceptable for additional resonance effect, which is closely related to the wavelength match of a laser beam and electronic transition wavelength of targets.…”
Section: Resultsmentioning
confidence: 99%
“…Spiro-pyran is prone to ring-opening reactions under UV excitation, and it is susceptible to photodegradation due to external influences and consumption [6]. The problem that needs to be solved for spiro-pyran is to improve its colorchanging properties and resistance to low fatigue [7]. One solution is to encapsulate the photochromic dyes in microcapsules of micro-nano composite particles, which can improve the applicability of photochromic materials and improve their fatigue resistance [8].Si [9] et al used spiro-pyran compound as the core material and chitosan as the shell material, and prepared intelligent photochromic chitosan microcapsules through emulsification and chemical crosslinking technology.…”
Section: Introductionmentioning
confidence: 99%
“…[20][21][22] Recently, spiropyran and its derivatives have been widely researched for preparing light-induced materials. 23,24 As typical photoisomerized compounds with controllable polarity, [25][26][27][28][29] they have many advantages in terms of the capabilities of chemical modification and reaction diversity. Therefore, spiropyran and its derivatives can provide an abundant source for the fabrication of photoresponsive materials with controllable wettability.…”
Section: Introductionmentioning
confidence: 99%