Volume 57, Issue 48 pp. 15797-15801
Communication

Platinum(II)-Based Supramolecular Scaffold-Templated Side-by-Side Assembly of Gold Nanorods through Pt⋅⋅⋅Pt and π–π Interactions

Yip-Sang Wong

Yip-Sang Wong

Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China

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Dr. Frankie Chi-Ming Leung

Dr. Frankie Chi-Ming Leung

Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China

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Dr. Maggie Ng

Dr. Maggie Ng

Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China

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Dr. Heung-Kiu Cheng

Dr. Heung-Kiu Cheng

Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China

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Prof. Dr. Vivian Wing-Wah Yam

Corresponding Author

Prof. Dr. Vivian Wing-Wah Yam

Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China

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First published: 17 September 2018
Citations: 21

Graphical Abstract

Side-by-side assembly: Supramolecular scaffold-templated side-by-side assembly of gold nanorods (GNRs) has been demonstrated by utilizing the sulfonate-containing alkynylplatinum(II) terpyridine complexes. Driven by non-covalent and directional Pt⋅⋅⋅Pt and π–π stacking interactions, the complexes show a high propensity to assemble in water with the plausible head-to-tail stacking arrangement to construct supramolecular scaffolds.

Abstract

The side-by-side assembly of gold nanorods (GNRs) was shown to be directed by the supramolecular scaffolds formed by sulfonate-containing alkynylplatium(II) terpyridine complexes. Driven by Pt⋅⋅⋅Pt and π–π stacking interactions, the PtII complex has a high propensity to assemble in water with the head-to-tail stacking arrangement to construct supramolecular scaffolds, in which the sulfonate groups on the terpyridine ligand at the peripheral position preferentially bind to the sides of the GNRs. The extent of the assembly of the GNRs into ladder rung-like nanostructures can be modulated by the concentration of the PtII complex. The Pt⋅⋅⋅Pt interaction-assisted formation of the scaffolds and its directed assembly of GNRs were characterized by UV/Vis spectroscopy, quantum-chemical modeling, electron microscopy, energy dispersed X-ray (EDX) analysis, and SERS. This work provides insights for the construction of higher-ordered nano-assemblies using both Pt⋅⋅⋅Pt interactions and template-directed approaches.

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