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Anisotropic lanthanide-based nano-clusters for imaging applications

Yang, Xiaoping; Wang, Shiqing; King, Tyler L.; Kerr, Christopher J.; Blanchet, Clement; Svergun, Dmitri; Pal, Robert; Beeby, Andrew; Vadivelu, Jamuna; Brown, Katherine A.; Jones, Richard A.; Zhang, Lijie; Huang, Shaoming

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Authors

Xiaoping Yang

Shiqing Wang

Tyler L. King

Christopher J. Kerr

Clement Blanchet

Dmitri Svergun

Jamuna Vadivelu

Katherine A. Brown

Richard A. Jones

Lijie Zhang

Shaoming Huang



Abstract

We have developed a new class of lanthanide nano-clusters that self-assemble using flexible Schiff base ligands. Cd–Ln and Ni–Ln clusters, [Ln8Cd24(L1)12(OAc)39Cl7(OH)2] (Ln = Nd, Eu), [Eu8Cd24(L1)12(OAc)44], [Ln8Cd24(L2)12(OAc)44] (Ln = Nd, Yb, Sm) and [Nd2Ni4(L3)2(acac)6(NO3)2(OH)2], were constructed using different types of flexible Schiff base ligands. These molecular nano-clusters exhibit anisotropic architectures that differ considerably depending upon the presence of Cd (nano-drum) or Ni (square-like nano-cluster). Structural characterization of the self-assembled particles has been undertaken using crystallography, transmission electron microscopy and small-angle X-ray scattering. Comparison of the metric dimensions of the nano-drums shows a consistency of size using these techniques, suggesting that these molecules may share similar structural features in both solid and solution states. Photophysical properties were studied by excitation of the ligand-centered absorption bands in the solid state and in solution, and using confocal microscopy of microspheres loaded with the compounds. The emissive properties of these compounds vary depending upon the combination of lanthanide and Cd or Ni present in these clusters. The results provide new insights into the construction of novel high-nuclearity nano-clusters and offer a promising foundation for the development of new functional nanomaterials.

Citation

Yang, X., Wang, S., King, T. L., Kerr, C. J., Blanchet, C., Svergun, D., …Huang, S. (2016). Anisotropic lanthanide-based nano-clusters for imaging applications. Faraday Discussions, 191, 465-479. https://doi.org/10.1039/c6fd00018e

Journal Article Type Article
Acceptance Date Mar 31, 2016
Online Publication Date Mar 31, 2016
Publication Date Oct 1, 2016
Deposit Date Mar 17, 2017
Publicly Available Date Jun 30, 2017
Journal Faraday Discussions
Print ISSN 1359-6640
Electronic ISSN 1364-5498
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 191
Pages 465-479
DOI https://doi.org/10.1039/c6fd00018e
Public URL https://durham-repository.worktribe.com/output/1390692

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