Format

Send to

Choose Destination
Chem Asian J. 2019 Mar 18. doi: 10.1002/asia.201900204. [Epub ahead of print]

Reversible Shape-Morphing and Fluorescence-Switching in Supramolecular Nanomaterials Consisting of Amphiphilic Cyanostilbene and Cucurbit[7]uril.

Author information

1
Laboratory for Supramolecular Optoelectronic Materials, Department of Materials Science and Engineering, Seoul National University, ENG 445, Seoul, 08826, Korea.

Abstract

We demonstrate a reversible shape-morphing with concurrent fluorescence switching in the nanomaterials which are complexed with cucurbit[7]uril (CB[7]) in water. The cyanostilbene derivative alone forms ribbon-like two-dimensional (2D) nanocrystals with bright yellow excimeric emission in water (λem =540 nm, ΦF =42 %). Upon CB[7] addition, however, the ribbon-like 2D nanocrystals immediately transform to spherical nanoparticles with significant fluorescence quenching and blue-shifting (λem =490 nm, ΦF =1 %) through the supramolecular complexation of the cyanostilbene and CB[7]. Based on this reversible fluorescence switching and shape morphing, we could demonstrate a novel strategy of turn-on fluorescence sensing of spermine and also monitoring of lysine decarboxylase activity.

KEYWORDS:

cucurbit[n]uril; fluorescence; host-guest complexes; self-assembly; supramolecular chemistry

PMID:
30883032
DOI:
10.1002/asia.201900204

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center