Quantum Dots as Templates for Self-Assembly of Photoswitchable Polymers: Small, Dual-Color Nanoparticles Capable of Facile Photomodulation
作者： Sebastián A Díaz , Luciana Giordano , Julio C Azcárate , Thomas M Jovin , Elizabeth A Jares-Erijman
DOI: 10.1021/JA3117813
关键词: Photochromism 、 Chemistry 、 Alkyl 、 Quantum dot 、 Nanotechnology 、 Self-assembly 、 Fluorescence 、 Polymersome 、 Polymer 、 Nanoparticle 、 Photochemistry
摘要: 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, diheteroarylethenes photochromic (PC) groups. The latter serve as reversible UV-activated FRET acceptors for the LY donors. We characterized spectral switching properties in an organic solvent (CHCl3). In aqueous medium forms polymersomes, constituting fluorescence probes ∼75 nm diameter. Self-assembly on surface quantum dot (QD) serving template creates dual-color photoswitchable nanoparticle (psNP) improved due to increase density efficiency PC photoconversion. psNP exhibits second QD red emission band that functions internal standard requiring only single excitation wavelength, is much reduced size (<20 diameter) compared polymersomes. also greatly increas...
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