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美國布魯克海文儀器公司>技術文章>Interaction between cyanine dye IR‐783 and polystyrene nanoparticles in solution

技術文章

Interaction between cyanine dye IR‐783 and polystyrene nanoparticles in solution

閱讀:321          發布時間:2018-6-21
 作者 Yunzhi Zhang, Hui Xu, Leah B. Casabianca

Department of Chemistry, Clemson UniversityClemson, SC, USA

 

摘要: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 dualuse imaging contrast agents. In this work, solutionstate NMR is used to examine the noncovalent interaction between a nearinfrared 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. SaturationTransfer 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. 

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