A Photoresponsive Orthogonal Supramolecular Complex Based on Host-Guest Interactions

Dongsheng Wang; Manfred Wagner; Andrew K Saydjari; Julius Mueller; Svenja Winzen; Hans-Jürgen Butt; Si Wu

doi:10.1002/chem.201604634

A Photoresponsive Orthogonal Supramolecular Complex Based on Host-Guest Interactions

Chemistry. 2017 Feb 21;23(11):2628-2634. doi: 10.1002/chem.201604634. Epub 2017 Jan 27.

Authors

Dongsheng Wang¹, Manfred Wagner¹, Andrew K Saydjari^{1

2}, Julius Mueller¹, Svenja Winzen¹, Hans-Jürgen Butt¹, Si Wu¹

Affiliations

¹ Max-Planck Institute of Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.
² Department of Chemistry, Yale University, 225 Prospect St., New Haven, CT, 06520, USA.

PMID: 27925694
DOI: 10.1002/chem.201604634

Abstract

We synthesized a novel green-light-responsive tetra-ortho-isopropoxy-substituted azobenzene (ipAzo). Cis-ipAzo forms a strong host-guest complex with γ-cyclo dextrin (γ-CD) whereas trans-ipAzo binds weakly. This new photoresponsive host-guest interaction is reverse to the well-known azobenzene (Azo)/α-cyclodextrin (α-CD) complex, which is strong only between trans-Azo and α-CD. By combining the UV-light-responsive Azo/α-CD and green-light-responsive ipAzo/γ-CD host-guest complexes, a photoresponsive orthogonal supramolecular system is developed.

Keywords: azo compounds; cage compounds; host-guest systems; photochemistry; supramolecular chemistry.