Issue 12, 2013

Supramolecular alignment of gold nanorodsviacucurbit[8]uril ternary complex formation

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

Supplementary files

Article information

Article type
Communication
Submitted
24 Mar 2013
Accepted
19 Apr 2013
First published
23 Apr 2013
This article is Open Access
Creative Commons BY license

Nanoscale, 2013,5, 5299-5302

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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