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Instruments / Technical Area	Publication Details	Published	Actions
I19-Small Molecule Single Crystal Diffraction	Pathway complexity in fibre assembly: from liquid crystals to hyper-helical gelmorphs Rafael Contreras-Montoya , James P. Smith , Stephen Boothroyd , Juan A. Aguilar , Marzieh Mirzamani , Martin A. Screen , Dmitry S. Yufit , Mark Robertson , Lilin He , Shuo Qian , Harshita Kumari , Jonathan W. Steed Chemical Science 46 DOI: 10.1039/D3SC03841F Diamond Proposal Number(s): [22240] Open Access Show Abstract ▼ Abstract: Pathway complexity results in unique materials from the same components according to the assembly conditions. Here a chiral acyl-semicarbazide gelator forms three different gels of contrasting fibre morphology (termed ‘gelmorphs’) as well as lyotropic liquid crystalline droplets depending on the assembly pathway. The gels have morphologies that are either hyperhelical (HH-Gel), tape-fibre (TF-Gel) or thin fibril derived from the liquid crystalline phase (LC-Gels) and exhibit very different rheological properties. The gelator exists as three slowly interconverting conformers in solution. All three gels are comprised of an unsymmetrical, intramolecular hydrogen bonded conformer. The kinetics show that formation of the remarkable HH-Gel is cooperative and is postulated to involve association of the growing fibril with a non-gelling conformer. This single molecule dynamic conformational library shows how very different materials with different morphology and hence very contrasting materials properties can arise from pathway complexity as a result of emergent interactions during the assembly process.	Sep 2023

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I19-Small Molecule Single Crystal Diffraction

Pathway complexity in fibre assembly: from liquid crystals to hyper-helical gelmorphs