Jonathan A Foster

Jonathan A Foster
The University of Sheffield | Sheffield · Department of Chemistry

PhD, MChem

About

19
Publications
2,238
Reads
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1,362
Citations
Introduction
Dr Jonathan Foster is a Vice Chancellors Fellow in the Department of Chemistry at the University of Sheffield. Jonathan has experience working with a wide range of nano-structured supramolecular materials including gels, polymers, cages and frameworks. His current research is focused on pioneering a new class of graphene-like two-dimensional materials called metal-organic nanosheets (MONs). For more details see: https://foster.group.shef.ac.uk/
Additional affiliations
October 2015 - present
The University of Sheffield
Position
  • Ramsay Fellow and University of Sheffield Vice Chancellor's Fellow
April 2015 - May 2015
University of Cambridge
Position
  • PostDoc Position
January 2015 - March 2015
University of Cambridge
Position
  • PostDoc Position

Publications

Publications (19)
Article
Full-text available
Optimizing the orientation, crystallinity, and domain size of components within organic photovoltaic (OPV) devices is key to maximizing their performance. Here a broadly applicable approach for enhancing the morphology of bulk heterojunction OPV devices using metal–organic nanosheets (MONs) as additives is demonstrated. It is shown that addition of...
Article
Full-text available
Metal‐organic framework nanosheets (MONs) have recently emerged as a distinct class of 2D materials with programmable structures that make them useful in diverse applications. In this review, the breadth of applications that have so far been investigated are surveyed, thanks to the distinct combination of properties afforded by MONs. How: 1) The hi...
Article
Full-text available
Metal-organic framework nanosheets (MONs) are attracting increasing attention as a diverse class of two-dimensional materials derived from metal-organic frameworks (MOFs). The principles behind the design of layered MOFs that can readily be exfoliated to form nanosheets, however, remain poorly understood. Here we systematically investigate an isore...
Article
We report the synthesis of a bis(urea) gelator designed to specifically mimic the chemical structure of the highly polymorphic drug substance ROY. Crystallization of ROY from toluene gels of this gelator results in the formation of the metastable red form instead of the thermodynamic yellow polymorph. In contrast, all other gels and solution contro...
Article
Full-text available
Supramolecular gelators with different fibre morphologies have been used as templates to form mesoporous covalent polymers with different pore shapes. Two bis-urea derived gelators functionalised with different amino-acid groups form gels in 1 : 1 methyl methacrylate : ethylene glycol dimethacrylate (MMA: EGDMA) mixtures with either ribbon-like or...
Article
Full-text available
Blending different low molecular weight gelators (LMWGs) provides a convenient route to tune the properties of a gel and incorporate functionalities such as fluorescence. Blending a series of gelators having a common bis-urea motif, and functionalised with different amino acid-derived end-groups and differing length alkylene spacers is reported. Fl...
Article
Full-text available
Supramolecular gels are topical soft materials involving the reversible formation of fibrous aggregates using non-covalent interactions. There is significant interest in controlling the properties of such materials by the formation of multicomponent systems, which exhibit non-additive properties emerging from interaction of the components. The use...
Article
Full-text available
A series of chiral bis(urea) compounds based on oligomethylene spacers with S-phenylethyl end groups have been investigated as low molecular weight gelators. The series shows gelation of a variety of liquids and their structural, morphological and rheological properties are reported. The bis(urea) compounds also act as supramolecular hosts for anio...
Article
Hydrogen bonding interactions with the π-system of thiocarbonyls are evident in the X-ray crystal structures of a range of thiourea derivatives and from an analysis of the CSD.
Article
Full-text available
A simple triethoxysilane appended bis(urea) low molecular weight gelator (LMWG) affords strong gels in organic solvents that are susceptible to fine tuning by anion binding, while the gel structure can be rigidified into a porous hybrid polymer material by hydrolysis of the triethoxysilane end groups.
Article
Endowing supramolecular gelators with cavities opens up a number of opportunities not possible with other gel systems. The well-established host-guest chemistry of cavitands can be utilized to build up and break down gel structures, introduce responsive functionalities, or enhance selectivity in applications such as catalysis and extraction. Cavity...
Article
Der Einsatz supramolekularer Gelatoren mit Hohlräumen eröffnet eine Reihe von Möglichkeiten, die bei anderen Gelsystemen nicht zur Verfügung stehen. Mit der bekannten Wirt-Gast-Chemie von Cavitanden können Gelstrukturen auf- und abgebaut, reaktionsfähige Funktionalitäten eingeführt und die Selektivität bei Anwendungen wie Katalyse oder Extraktion p...

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