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Interaction Between Cyanine Dye IR-783 and Polystyrene Nanoparticles in Solution

Interaction Between Cyanine Dye IR-783 and Polystyrene Nanoparticles in Solution

Yunzhi Zhang, Hui Xu, Leah B Casabianca

Magn Reson Chem. 2018 Nov;56(11):1054-1060.

PMID: 29771468

Abstract:

The interactions between small molecule drugs or dyes and nanoparticles are important to the use of nanoparticles in medicine. Noncovalent adsorption of dyes on nanoparticle surfaces is also important to the development of nanoparticle dual-use imaging contrast agents. In this work, solution-state NMR is used to examine the noncovalent interaction between a near-infrared cyanine dye and the surface of polystyrene nanoparticles in solution. Using 1D proton NMR, we can approximate the number of dye molecules that associate with each nanoparticle for different sized nanoparticles. Saturation-Transfer Difference NMR was also used to show that protons near the positively charged nitrogen in the dye are more strongly associated with the negatively charged nanoparticle surface than protons near the negatively charged sulfate groups of the dye. The methods described here can be used to study similar drug or dye molecules interacting with the surface of organic nanoparticles.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP115970666	IR-783		115970-66-6	Price

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