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Abstract:

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.

Registro:

Documento: Artículo
Título:Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation
Autor:Díaz, S.A.; Giordano, L.; Azcárate, J.C.; Jovin, T.M.; Jares-Erijman, E.A.
Filiación:Laboratory of Cellular Dynamics, Max Planck Institute for Biophysical Chemistry, Am Fassberg 11, 37077 Göttingen, Germany
Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, CONICET, 1428 Buenos Aires, Argentina
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas, Facultad de Ciencias Exactas, CONICET, La Plata, Argentina
Palabras clave: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
Año:2013
Volumen:135
Número:8
Página de inicio:3208
Página de fin:3217
DOI: http://dx.doi.org/10.1021/ja3117813
Título revista:Journal of the American Chemical Society
Título revista abreviado:J. Am. Chem. Soc.
ISSN:00027863
CODEN:JACSA
CAS:chloroform, 67-66-3; Polymers; Solvents
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027863_v135_n8_p3208_Diaz

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Citas:

---------- APA ----------
Díaz, S.A., Giordano, L., Azcárate, J.C., Jovin, T.M. & Jares-Erijman, E.A. (2013) . Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation. Journal of the American Chemical Society, 135(8), 3208-3217.
http://dx.doi.org/10.1021/ja3117813
---------- CHICAGO ----------
Díaz, S.A., Giordano, L., Azcárate, J.C., Jovin, T.M., Jares-Erijman, E.A. "Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation" . Journal of the American Chemical Society 135, no. 8 (2013) : 3208-3217.
http://dx.doi.org/10.1021/ja3117813
---------- MLA ----------
Díaz, S.A., Giordano, L., Azcárate, J.C., Jovin, T.M., Jares-Erijman, E.A. "Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation" . Journal of the American Chemical Society, vol. 135, no. 8, 2013, pp. 3208-3217.
http://dx.doi.org/10.1021/ja3117813
---------- VANCOUVER ----------
Díaz, S.A., Giordano, L., Azcárate, J.C., Jovin, T.M., Jares-Erijman, E.A. Quantum dots as templates for self-assembly of photoswitchable polymers: Small, dual-color nanoparticles capable of facile photomodulation. J. Am. Chem. Soc. 2013;135(8):3208-3217.
http://dx.doi.org/10.1021/ja3117813