Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation
A photomodulatable amphiphilic polymer has been synthesized with a backbone of poly[isobutylene-alt-maleic anhydride] and pendant dodecyl alkyl chains, Lucifer Yellow (LY) fluorescent probes, and diheteroarylethenes photochromic (PC) groups. The latter serve as reversible UV-activated FRET acceptors...
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2013
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027863_v135_n8_p3208_Diaz http://hdl.handle.net/20.500.12110/paper_00027863_v135_n8_p3208_Diaz |
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paper:paper_00027863_v135_n8_p3208_Diaz2023-06-08T14:22:52Z Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation Giordano, Luciana Jares, Elizabeth Andrea Alkyl chain Amphiphilic polymers Aqueous medium Depth of modulation Dual color Fluorescence probes Fluorescent probes Internal standards Lucifer yellows Photo modulation Photo-switchable Photoconversion Polymer densities Polymersomes Red emission band Single excitation Switching properties Time-resolved Butenes Fluorescence Maleic anhydride Nanoparticles Organic solvents Photochromism Self assembly Semiconductor quantum dots Polymers acid anhydride amphophile aromatic amine chloroform fluorescent dye polymer quantum dot anisotropy aqueous solution article bleaching conformation conjugation controlled study density energy transfer fluorescence spectroscopy gel permeation chromatography micelle photochemistry photon quantum yield suspension synthesis ultraviolet irradiation Color Fluorescence Resonance Energy Transfer Kinetics Nanoparticles Polymers Quantum Dots Solvents Spectrophotometry, Ultraviolet A photomodulatable amphiphilic polymer has been synthesized with a backbone of poly[isobutylene-alt-maleic anhydride] and pendant dodecyl alkyl chains, Lucifer Yellow (LY) fluorescent probes, and diheteroarylethenes photochromic (PC) groups. The latter serve as reversible UV-activated FRET acceptors for the LY donors. We characterized the spectral and switching properties of the polymer in an organic solvent (CHCl3). In an aqueous medium the polymer forms polymersomes, constituting fluorescence probes ∼75 nm in diameter. Self-assembly of the polymer on the surface of a quantum dot (QD) serving as a template creates a dual-color photoswitchable nanoparticle (psNP) with improved properties due to the increase in polymer density and efficiency of PC photoconversion. The psNP exhibits a second QD red emission band that functions as an internal standard requiring only a single excitation wavelength, and is much reduced in size (<20 nm diameter) compared to the polymersomes. The QD template also greatly increases the depth of modulation by photochromic FRET of the LY emission monitored by both steady-state and time-resolved (lifetime) fluorescence (from 20%→70%, and from 12%→55%, respectively). © 2013 American Chemical Society. Fil:Giordano, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Jares-Erijman, E.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027863_v135_n8_p3208_Diaz http://hdl.handle.net/20.500.12110/paper_00027863_v135_n8_p3208_Diaz |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Alkyl chain Amphiphilic polymers Aqueous medium Depth of modulation Dual color Fluorescence probes Fluorescent probes Internal standards Lucifer yellows Photo modulation Photo-switchable Photoconversion Polymer densities Polymersomes Red emission band Single excitation Switching properties Time-resolved Butenes Fluorescence Maleic anhydride Nanoparticles Organic solvents Photochromism Self assembly Semiconductor quantum dots Polymers acid anhydride amphophile aromatic amine chloroform fluorescent dye polymer quantum dot anisotropy aqueous solution article bleaching conformation conjugation controlled study density energy transfer fluorescence spectroscopy gel permeation chromatography micelle photochemistry photon quantum yield suspension synthesis ultraviolet irradiation Color Fluorescence Resonance Energy Transfer Kinetics Nanoparticles Polymers Quantum Dots Solvents Spectrophotometry, Ultraviolet |
| spellingShingle |
Alkyl chain Amphiphilic polymers Aqueous medium Depth of modulation Dual color Fluorescence probes Fluorescent probes Internal standards Lucifer yellows Photo modulation Photo-switchable Photoconversion Polymer densities Polymersomes Red emission band Single excitation Switching properties Time-resolved Butenes Fluorescence Maleic anhydride Nanoparticles Organic solvents Photochromism Self assembly Semiconductor quantum dots Polymers acid anhydride amphophile aromatic amine chloroform fluorescent dye polymer quantum dot anisotropy aqueous solution article bleaching conformation conjugation controlled study density energy transfer fluorescence spectroscopy gel permeation chromatography micelle photochemistry photon quantum yield suspension synthesis ultraviolet irradiation Color Fluorescence Resonance Energy Transfer Kinetics Nanoparticles Polymers Quantum Dots Solvents Spectrophotometry, Ultraviolet Giordano, Luciana Jares, Elizabeth Andrea Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation |
| topic_facet |
Alkyl chain Amphiphilic polymers Aqueous medium Depth of modulation Dual color Fluorescence probes Fluorescent probes Internal standards Lucifer yellows Photo modulation Photo-switchable Photoconversion Polymer densities Polymersomes Red emission band Single excitation Switching properties Time-resolved Butenes Fluorescence Maleic anhydride Nanoparticles Organic solvents Photochromism Self assembly Semiconductor quantum dots Polymers acid anhydride amphophile aromatic amine chloroform fluorescent dye polymer quantum dot anisotropy aqueous solution article bleaching conformation conjugation controlled study density energy transfer fluorescence spectroscopy gel permeation chromatography micelle photochemistry photon quantum yield suspension synthesis ultraviolet irradiation Color Fluorescence Resonance Energy Transfer Kinetics Nanoparticles Polymers Quantum Dots Solvents Spectrophotometry, Ultraviolet |
| description |
A photomodulatable amphiphilic polymer has been synthesized with a backbone of poly[isobutylene-alt-maleic anhydride] and pendant dodecyl alkyl chains, Lucifer Yellow (LY) fluorescent probes, and diheteroarylethenes photochromic (PC) groups. The latter serve as reversible UV-activated FRET acceptors for the LY donors. We characterized the spectral and switching properties of the polymer in an organic solvent (CHCl3). In an aqueous medium the polymer forms polymersomes, constituting fluorescence probes ∼75 nm in diameter. Self-assembly of the polymer on the surface of a quantum dot (QD) serving as a template creates a dual-color photoswitchable nanoparticle (psNP) with improved properties due to the increase in polymer density and efficiency of PC photoconversion. The psNP exhibits a second QD red emission band that functions as an internal standard requiring only a single excitation wavelength, and is much reduced in size (<20 nm diameter) compared to the polymersomes. The QD template also greatly increases the depth of modulation by photochromic FRET of the LY emission monitored by both steady-state and time-resolved (lifetime) fluorescence (from 20%→70%, and from 12%→55%, respectively). © 2013 American Chemical Society. |
| author |
Giordano, Luciana Jares, Elizabeth Andrea |
| author_facet |
Giordano, Luciana Jares, Elizabeth Andrea |
| author_sort |
Giordano, Luciana |
| title |
Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation |
| title_short |
Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation |
| title_full |
Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation |
| title_fullStr |
Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation |
| title_full_unstemmed |
Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation |
| title_sort |
quantum dots as templates for self-assembly of photoswitchable polymers: small, dual-color nanoparticles capable of facile photomodulation |
| publishDate |
2013 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027863_v135_n8_p3208_Diaz http://hdl.handle.net/20.500.12110/paper_00027863_v135_n8_p3208_Diaz |
| work_keys_str_mv |
AT giordanoluciana quantumdotsastemplatesforselfassemblyofphotoswitchablepolymerssmalldualcolornanoparticlescapableoffacilephotomodulation AT jareselizabethandrea quantumdotsastemplatesforselfassemblyofphotoswitchablepolymerssmalldualcolornanoparticlescapableoffacilephotomodulation |
| _version_ |
1768545857221689344 |