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Issue 12, 2013
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Supramolecular alignment of gold nanorods via cucurbit[8]uril ternary complex formation

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Abstract

We have shown, for the first time, that a three component system is capable of aligning gold nanorods (AuNRs) through supramolecular host–guest interactions leading to control over AuNR end-to-end assembly. Viologen end-functionalised AuNRs were prepared that were capable of selectively binding to a cucurbit[8]uril (CB[8]) macrocyclic host molecule. These end-functionalised AuNRs could participate in 1 : 1 : 1 ternary complexation with synthesised telechelic linker molecules bearing second guest moieties, in the presence of CB[8]. When the linker length was long and flexible aggregation and precipitation of AuNRs were readily observed, but with no control over the AuNR conformation. On the other hand, when the linker length was shortened thereby imparting a more rigid connection between neighboring gold nanorods, the end-to-end assembly of AuNRs was achieved. We also note that in the presence of a molecule capable of occupying the entirety of the CB[8] cavity, end-to-end assembly is not observed as the system's ability to form a 1 : 1 : 1 ternary complex is halted. Thus, the end-to-end assembly relies upon both having a relatively short and rigid linker as well as the specific, yet tuneable supramolecular 1 : 1 : 1 ternary complexation between the three components.

Graphical abstract: Supramolecular alignment of gold nanorods via cucurbit[8]uril ternary complex formation

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Publication details

The article was received on 24 Mar 2013, accepted on 19 Apr 2013 and first published on 23 Apr 2013


Article type: Communication
DOI: 10.1039/C3NR01454A
Citation: Nanoscale, 2013,5, 5299-5302
  • Open access: Creative Commons BY license
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    Supramolecular alignment of gold nanorods via cucurbit[8]uril ternary complex formation

    S. T. Jones, J. M. Zayed and O. A. Scherman, Nanoscale, 2013, 5, 5299
    DOI: 10.1039/C3NR01454A

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