Next Article in Journal
Shape-Changing Tubular Hydrogels
Next Article in Special Issue
Chiral Assembly Preferences and Directing Effects in Supramolecular Two-Component Organogels
Previous Article in Journal
Crystal Crosslinked Gels for the Deposition of Inorganic Salts with Polyhedral Shapes
Previous Article in Special Issue
Supramolecular Gel Formation Based on Glycolipids Derived from Renewable Resources
Article Menu
Issue 1 (March) cover image

Export Article

Open AccessArticle

Using Aggregation-Induced Emission to Understand Dipeptide Gels

Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, UK
School of Chemistry, University of Glasgow, Glasgow G12 8QQ, UK
Author to whom correspondence should be addressed.
Received: 11 January 2018 / Revised: 1 February 2018 / Accepted: 7 February 2018 / Published: 9 February 2018
(This article belongs to the Special Issue Supramolecular Gels)
Full-Text   |   PDF [1293 KB, uploaded 9 February 2018]   |  


We describe the formation of structured liquids and gels from a functionalised dipeptide based on tetraphenylethylene. Tetraphenylethylene is well-known to be able to undergo aggregation-induced emission. We use the emission data to understand the behaviour of the dipeptide in water under a variety of conditions. The dipeptide forms viscous solutions at high pH. Gels can be formed by a pH-trigger, but syneresis occurs. Addition of a calcium salt also leads to a gel with slight syneresis. Addition of sodium chloride leads to a self-supporting material, but this is not a true gel from the rheological perspective. From the emission data, we infer that there are limited structural changes on addition of sodium chloride or acid, but there are significant changes in molecular packing when the gel is formed by addition of a calcium salt. View Full-Text
Keywords: hydrogel; self-assembly; supramolecular; aggregation; fluorescence hydrogel; self-assembly; supramolecular; aggregation; fluorescence

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Supplementary material


Share & Cite This Article

MDPI and ACS Style

Castilla, A.M.; Dietrich, B.; Adams, D.J. Using Aggregation-Induced Emission to Understand Dipeptide Gels. Gels 2018, 4, 17.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Gels EISSN 2310-2861 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top