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The Visualized Polarity-Sensitive Magnetic Nanoparticles

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† National Center for Nanoscience and Technology, Beijing 100190, China
‡ Graduate University of Chinese Academy of Sciences, Beijing 100049, China
*Corresponding author: Fax +86-10-82545576; e-mail [email protected]
Cite this: Langmuir 2010, 26, 11, 8893–8900
Publication Date (Web):February 9, 2010
https://doi.org/10.1021/la9046512
Copyright © 2010 American Chemical Society
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    Abstract

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    Three polarity-sensitive organic molecules (DIAA, DIUA, and DISA) were designed and synthesized for functionalizing high-quality superparamagnetic Fe3O4 nanoparticles (NPs) via the ligand exchange strategy to prepare polarity-sensitive Fe3O4 NPs. The functional group is chosen to be the carboxyl group (one for DIAA and DIUA, two for DISA) that is a universal coordinating site for iron oxide NPs. The method for binding these functional molecules onto the surface of the NPs is simple and straightforward. Among the three molecules, the DISA molecules passivate the NPs’ surface most efficiently owing to their particular structure with two carboxyl groups and a general good solubility. The DISA-functionalized Fe3O4 NPs (DISA−Fe3O4 NPs) display distinctly different fluorescence emissions in various solvents of different polarities with the magnetism well preserving. The prepared polarity-sensitive Fe3O4 NPs that are dual functional can be used as a visualized polarity sensor and perform NPs’ superparamagnetic properties simultaneously. It also provides a conceptual design for preparing the polarity-sensitive nanomaterials with multifunction.

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    TEM images of the as-prepared magnetic NPs and polarity-sensitive molecule-decorated NPs, UV−vis spectra of the supernatant during the purification process, FTIR spectra of the polarity-sensitive molecules and the polarity-sensitive magnetic NPs, the dissolution of the polarity-sensitive molecules in solvents of varying polarity, the normalized UV−vis and fluorescence spectra of DISA and DISA−Fe3O4 NPs in various solvents, and the enlargement of the magnetization isotherms of 5.4 nm Fe3O4 NPs at 10 and 300 K. The material is available free of charge via the Internet at http://pubs.acs.org.

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    Cited By

    This article is cited by 5 publications.

    1. Kathleen Davis, Bin Qi, Michael Witmer, Christopher L. Kitchens, Brian A. Powell, and O. Thompson Mefford . Quantitative Measurement of Ligand Exchange on Iron Oxides via Radiolabeled Oleic Acid. Langmuir 2014, 30 (36) , 10918-10925. https://doi.org/10.1021/la502204g
    2. Saba Jamil, Muhammad Ramzan Saeed Ashraf Janjua. Synthetic Study and Merits of Fe3O4 Nanoparticles as Emerging Material. Journal of Cluster Science 2017, 28 (5) , 2369-2400. https://doi.org/10.1007/s10876-017-1256-3
    3. Suman Mallick, Kaushik Pal, Apurba L. Koner. Probing microenvironment of micelle and albumin using diethyl 6-(dimethylamino)naphthalene-2,3-dicarboxylate: An electroneutral solvatochromic fluorescent probe. Journal of Colloid and Interface Science 2016, 467 , 81-89. https://doi.org/10.1016/j.jcis.2015.12.022
    4. Noi Niamsa, Chatthai Kaewtong, Weerapol Srinonmuang, Banchob Wanno, Buncha Pulpoka, Thawatchai Tuntulani. Hybrid organic–inorganic nanomaterial sensors for selective detection of Au3+ using rhodamine-based modified polyacrylic acid (PAA)-coated FeNPs. Polymer Chemistry 2013, 4 (10) , 3039. https://doi.org/10.1039/c3py00229b
    5. Min Han, Pei Guo, Xiuhua Wang, Wenwen Tu, Jianchun Bao, Zhihui Dai. Mesoporous SiO2–(l)-lysine hybrid nanodisks: direct electron transfer of superoxide dismutase, sensitive detection of superoxide anions and its application in living cell monitoring. RSC Advances 2013, 3 (43) , 20456. https://doi.org/10.1039/c3ra42403k
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