Photochromic, organogelating and self-sorting behaviour of di-(dithienylethene) derivatives

Abstract

They wouldn't mix! – Narcissistic self-sorting was found to exist in a 1 : 1 mixture of the two photoisomers of a di-(dithienylethene)-containing organgelator.

Stimuli responsive dynamic transformations in supramolecular gels

“…In case of photoresponsive gelators, this leads to ring opening or ring closing reaction for the chromophores like dithienylethenes, spiropyrans and spirooxazines. [121][122][123] Here, the gel transformation is primarily driven by the photoinduced changes of planarity due to loss or gain of sp 2 hybridized centres, which leads to a change in effective p-conjugation length as well as stacking interactions. For example, on UV exposure, spiropyrans and spirooxazines (commonly known as chromones) undergo electrocyclic ring opening to give a product with more sp 2 character making them flexible but planar and more conjugated than the reactant (Fig.…”

Solvent Effects on Gelation Behavior of the Organogelator Based on L-Phenylalanine Dihydrazide Derivatives

“…The organogels, which are held together by non-covalent interactions, can be transformed to a solution phase by other physical and chemical stimuli [2,3,4]. Since organogels respond quickly when they are stimulated by external environmental factors, many recent studies have shown that they can be found in applications in various fields such as drug release [5], oil spill recovery [6], mesoporous materials [7], photoresponsive materials [8], nanostructure templates [9], drug delivery and tissue engineering [10], and the detection of heavy metal ions in water [11].…”