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Functional nanoscale metal-organic particles synthesized from a new vinylimidazole-based polymeric ligand and dysprosium ion

Abstract

With nanoparticles (NPs) getting more and more crucial to various key technologies, it is essential to sustainedly develop new NPs with desirable functionalities. In this regard, nanoscale metal-organic particles (NMOPs) offer a competitive choice for their highly tunable nature, whereas seeking new organic ligands (e.g. polymeric ones) represents a preferable research direction on NMOPs. With these in mind, water- and ethanol- soluble vinylimidazole-based polymer, poly[(1-vinylimidazole-co-(poly(ethylene glycol) methacrylate)] (VI-co-PEGMA), was designed, synthesized, and demonstrated to be exactly such a new ligand. Formation of NPs through coordination-driven self-assembly of VI-co-PEGMA and dysprosium ions (Dy3+) was studied as functions of molecular structure of VI-co-PEGMA, Dy3+ addition rate, mixing rate and duration, and feed ratio of Dy3+/VI-co-PEGMA. As-synthesized NPs exhibit bimodal dysprosium fluorescence and magnetism with strong dependence on the coordinated Dy3+ contents. Moreover, these NPs may also possess the guest loading capacity, as indicated by their amorphous nature and high coordination number of Dy3+. By coating with silica shells, the resultant NP@silica materials further develop an anti-disassembling ability in aqueous media, which is absent from most of NMOPs based on water-soluble ligands. An application demonstration performed using mouse L-929 cells shows that the silica-coated NPs can act as bimodal magneto-fluorescent probes for cellular bioimaging. This work thus represents a meaningful attempt for development of new functional NPs based on the existing NMOP strategy by using an elaborately designed polymer as organic linker and Dy3+ as metal center.

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Publication details

The article was received on 21 Aug 2017, accepted on 06 Dec 2017 and first published on 07 Dec 2017


Article type: Paper
DOI: 10.1039/C7TC03795C
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Functional nanoscale metal-organic particles synthesized from a new vinylimidazole-based polymeric ligand and dysprosium ion

    J. Cui, G. Zhang, L. Xin, P. Yun, Y. Yan and F. Su, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC03795C

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