532930-47-5Relevant academic research and scientific papers
Dynamic chirality, chirality transfer and aggregation behaviour of dithienylethene switches
de Jong, Jaap J.D.,van Rijn, Patrick,Tiemersma-Wegeman, Theodora D.,Lucas, Linda N.,Browne, Wesley R.,Kellogg, Richard M.,Uchida, Kingo,van Esch, Jan H.,Feringa, Ben L.
, p. 8324 - 8335 (2008/12/21)
The synthesis and characterisation of a series of chiral and achiral low molecular weight organogelators (LMWGs) based on bis-amide substituted dithienylethene photochromic switches is reported. The LMWGs gelate a range of solvents depending on the specific functionalisation of the hydrogen bonding amide groups. In mixtures of chiral and achiral LMWGs the stereochemical outcome of the chiral aggregation is determined by the chiral LMWG molecules in most cases. However, for the first time we demonstrate that the stereochemical outcome of the aggregation can be influenced by the achiral LWMG molecules in some cases. Furthermore specific π-π (and/or van der Waals) interactions of chiral LMWGs 1-3o with the solvent allow the solvent to influence the control of chirality of aggregation. This influence of the solvent has a dramatic effect on whether four- or two-gel states are available.
Delivery of a substance to a pre-determinated site
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, (2008/06/13)
The invention is concerned with delivery vehicles for delivering a substance of interest to a predetermined site, said vehicle comprising said substance and a means for inducing availability of at least one compartment of said vehicle toward the exterior, thereby allowing access of said substance to the exterior of said vehicle at said predetermined site. The invention is further concerned with uses of said vehicle and methods for preparing it.
