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Light-Switchable Self-Assembly of Non-Photoresponsive Gold Nanoparticles

Light-Switchable Self-Assembly of Non-Photoresponsive Gold Nanoparticles

Yuming Cheng, Jinfeng Dong, Xuefeng Li

Langmuir. 2018 May 29;34(21):6117-6124.

PMID: 29716191

Abstract:

Herein, an interesting light-induced self-assembly behavior from non-photoresponsive gold nanoparticles (Au NPs) was reported. Specifically, a pH-responsive amphiphile SPBwas developed that contained a particular phenylboronic acid moiety and showed excellent surface activity at the neutral and basic conditions, thereby stabilizing Au NPs well. Accordingly, the SPB-functionalized Au NPs showed strong pH dependence that there presented the pH-induced reversible self-assembly behavior. Furthermore, the introduction of a small amount of commercially available photoacid generator named diphenyliodonium nitrate (DIN) into the system could endow it with apparent light-switchable self-assembly behavior. The pH- and light-induced self-assembly behaviors of SPB-functionalized Au NPs in the absence and presence of DIN, respectively, were systematically studied by various techniques including UV-vis spectrum, transmission electron microscope, nuclear magnetic resonance, and Fourier transform infrared spectroscopy, which evidently confirmed that the stimuli-responsive self-assembly was controlled by the hydrogen-bonding interactions between phenylboronic acid moieties. Attributing to the light-induced obvious color change from bright-red to deep purple, the system was applied in particle imprinting successfully.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP722565	Diphenyliodonium nitrate		722-56-5	Price

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