Chemistry (Scholarly Publications): Recent submissions
Now showing items 561-580 of 931
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Hierarchical supramolecular fullerene architectures with controlled dimensionality
(2005)Self-assembly of a fullerene derivative with long alkyl chains in different solvents results in the formation of hierarchically- ordered supramolecular assemblies with well-defined 1, 2 and 3Darchitecturessuchasvesicle s, ... -
Charge-modulated self-assembly and growth of conjugated polyelectrolyte-polyoxometalate hybrid networks.
(2014)Self-assembly of an anionic polyoxometalate with cationic conjugated polyelectrolytes leads to hybrid supramolecular networks whose dimensionality is controlled by the chain length and steric charge distribution. -
Tandem ionic liquid antimicrobial toxicity and asymmetric catalysis study: carbonyl-ene reactions with trifluoropyruvate
(2013)Imidazolium Brønsted acidic catalysts substituted with ester/amides have been assessed for both antimicrobial toxicity and biodegradation. Low toxicity to a screen of 20 microbial strains (12 fungi and 8 bacteria) was ... -
Aerobic oxidation of NHC-catalysed aldehyde esterifications with alcohols: Benzoin, not the Breslow intermediate, undergoes oxidation
(2013)Benzoin (and neither the Breslow intermediate nor the NHC–aldehyde tetrahedral adduct) has been unambiguously identified as the oxidised species in aerobic NHC-catalyse d aldehyde esterifications. -
NHC-catalysed aerobic aldehyde-esterifications with alcohols: no additives or cocatalysts required
(2013)A highly efficient, broad scope, additive-free mild protocol for the oxidative carbene-catalysed esterification of aldehydes (including the related aqueous oxidation to acids) has been developed -
Highly enantioselective ylide-mediated synthesis of terminal epoxides
(2012)The highly efficient asymmetric epoxidation of aldehydes by methylene transfer is now possible using new sulfonium salts -
Catalytic, enantio- and diastereoselective synthesis of gamma-butyrolactones incorporating quaternary stereocentres
(2012)A new, highly enantio- and diastereoselective catalytic asymmetric formal cycloaddition of aryl succinic anhydrides and aldehydes which generates paraconic acid (y-butyrolactone) derivatives is reported. -
NHC-Catalysed, chemoselective crossed-acyloin reactions
(2012)It has been shown for the first time that relatively electron deficient triazolium pre-catalysts promote (at low loadings in the presence of base) highly chemoselective crossed acyloin condensation reactions between aldehydes ... -
Highly tunable arylated cinchona alkaloids as bifunctional catalysts
(2012)We report the design and evaluation of a library of chiral bifunctional organocatalysts in which the distance between the catalytically active units can be systematically varied. -
Methoxy functionalisation: exerting synthetic control of the supramolecular and electronic structure of nitrogen-doped nanographenes
(2014)We describe a series of functionalized N-containing heterosuperbenzenes, created with a view to investigating the strategic role of methoxy substituents in (i) promoting cyclodehydrogenation and (ii) tuning the electronic ... -
Graphene field emission devices
(2014)Graphene field emission devices are fabricated using a scalable process. The field enhancement factors, determined from the Fowler-Nordheim plots, are within few hundreds and match the theoretical predictions. The devices ... -
Comparison of carbon nanotube forest growth using AlSi, TiSiN, and TiN as conductive catalyst supports
(2014)We evaluate carbon nanotube growth by employing AlSi, TiSiN and TiN as conductive catalyst supports. Using a wide range of chemical vapour deposition conditions, we find that only AlSi and TiSiN yield homogeneously-sized ... -
Investigation of the optical properties of MoS2 thin films using spectroscopic ellipsometry
(2014)Spectroscopic ellipsometry (SE) characterization of layered transition metal dichalcogenide (TMD) thin films grown by vapor phase sulfurization is reported. By developing an optical dispersion model, the extinction coefficient ... -
Helium ion microscope generated nitrogen-vacancy centres in type Ib diamond
(2014)We report on position and density control of nitrogen-vacancy (NV) centres created in type Ib diamond using localised exposure from a helium ion microscope and subsequent annealing. Spatial control to <380 nm has been ... -
Nitrogen-doped pyrolytic carbon films as highly electrochemically active electrodes
(2013)Nitrogen-doped Pyrolytic Carbon (N-PyC) films were employed as an electrode material in electrochemical applications. PyC was grown by via non-catalysed chemical vapour deposition and subsequently functionalised via exposure ... -
Characterization of graphene-silicon Schottky barrier diodes using impedance spectroscopy
(2013)We investigate the interface characteristics of graphene-silicon Schottky barrier diodes using dc current-voltage measurements and ac impedance spectroscopy (IS). Diode parameters, including the ideality factor and the ... -
Origami-based spintronics in graphene
(2013)We show that periodically folded graphene sheets with enhanced spin-orbit interaction due to curvature effects can carry spin-polarized currents and have gaps in the electronic spectrum in the presence of weak magnetic ... -
Electrical properties of high density arrays of silicon nanowire field effect transistors
(2013)Proximity effect corrected e-beam lithography of hydrogen silsesquioxane on silicon on insulator was used to fabricate multi-channel silicon nanowire field-effect transistors (SiNW FETs). Arrays of 15-channels with a line ... -
Helium ion microscopy of graphene: Beam damage, image quality and edge contrast
(2013)A study to analyse beam damage, image quality and edge contrast in the helium ion microscope (HIM) has been undertaken. The sample investigated was graphene. Raman spectroscopy was used to quantify the disorder that can ...
