Chemistry (Scholarly Publications): Recent submissions
Now showing items 821-840 of 931
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Magnetoresistance of Fe3O4-graphene-Fe3O4 junctions
(2011)The magnetoresistance (MR) of Fe3O4-graphene-Fe3O4 junctions has been experimentally studied at different temperatures. It is found that a barrier exists at the Fe3O4/graphene interface. The existence of the interfacial ... -
3-Urea-1,8-naphthalimides are good chemosensors: a highly selective dual colorimetric and fluorescent ICT based anion sensor for fluoride
(2011)he 1,8-naphthalimide sensor 1 was developed as a colorimetric and fluorescent sensor for anions. Being the first example of such anion sensors, where the 3-position of the naphthalimide ring is used to incorporate the anion ... -
Comparison of the defective pyrochlore and ilmenite polymorphs of AgSbO3 using GGA and hybrid DFT
(2011)Silver antimonate, AgSbO3, in both its defective pyrochlore and ilmenite structural polymorphs, has been suggested as a possible candidate mixed metal oxide for use in the photocatalytic splitting of water in visible light. ... -
Urea derivatives are highly active catalysts for the base-mediated generation of terminal epoxides from aldehydes and trimethylsulfonium iodide
(2008)N,N?-Diarylureas have been shown to efficiently catalyse sulfonium ylide-mediated aldehyde epoxidation reactions for the first time. These processes are of broad scope and can be coupled with a subsequent Cu(II) ion-catalysed ... -
Asymmetric catalysis with bifunctional cinchona alkaloid-based urea and thiourea organocatalysts
(2008)Cinchona alkaloid derivatives modified to include a (thio)urea component have emerged in the last three years as readily accessible, robust and tunable bifunctional organocatalysts for a range of synthetically useful ... -
Highly recyclable, imidazolium derived ionic liquids of low antimicrobial and antifungal toxicity: A new strategy for acid catalysis
(2010)Imidazolium derived ionic liquid catalysts have been developed which are aprotic and of low antimicrobial and antifungal toxicity, yet which can act as efficient Br?nsted acidic catalysts in the presence of protic additives. ... -
Novel amine-catalysed hydroalkoxylation reactions of alkenes and alkynes
(2005)Substoichiometric loadings of DBU catalyse the efficient 1,4- addition of alcohols and non-nucleophilic amines such as pyrrole to activated alkenes; the application of this methodology in a one-pot synthesis of a natural ... -
University-School Partnerships: on the impact on students of Summer Schools (for school students aged 17-18) run by Bristol ChemLabS
(Babes-Bolyai University, 2010)Chemistry summer schools for 17-18 year old school students in the UK were run by Bristol ChemLabS, a Centre for Excellence in Teaching and Learning in Chemistry at the University of Bristol. Students attending were all ... -
Stability, geometry, and electronic structure of an alternative I-III-VI2 material, CuScS2: A hybrid density functional theory analysis
(2010)Cu based I-III-VI2 materials have received much attention due to their utility in solar cell applications. The vast majority these studies have focused on materials with group IIIA cations as the trivalent metal. In this ... -
Polaronic trapping of electrons and holes by native defects in anatase TiO2
(2009)We have investigated the formation of native defects in anatase TiO2 using density functional theory DFT modified with on-site Coulomb terms DFT+U applied to both Ti d and O p states. Oxygen vacancies and titanium ... -
Comparative study of bandwidths in copper delafossites from x-ray emission spectroscopy
(2009)The widths of the valence bands in the copper (I) delafossites CuGaO2, CuInO2, and CuScO2 have been measured by O?K-shell x-ray emission spectroscopy and are compared with previous experimental work on CuAlO2 and CuCrO2. ... -
The enantioselective benzoin condensation promoted by chiral triazolium precatalysts: stereochemical control via hydrogen bonding.
(2009)The design of a new class of triazolium ion precatalysts incorporating protic substituents is described. These materials promote the enantioselective benzoin condensation of a range of aromatic aldehydes (1?62% ee). ... -
(5,15-Dianthracen-9-yl-10,20-dihexyl-porphyrinato)nickel(II): A planar nickel(II) porphyrin
(2010)The title compound, [Ni(C60H52N4)], is an example of a meso tetrasubstituted nickel(II) porphyrin with both meso aryl and alkyl residues. The molecule exhibits a planar macrocycle with an average deviation of the 24 ... -
Effect of external magnetic fields on electron transfer and ion pairing dynamics at ferrocenyl alkane thiol SAM/solution interfaces
(2010)The redox behaviour of ferrocene alkane thiol self assembled monolayer modified electrodes in contact with aqueous perchlorate solutions both in the absence of and in the presence of an external magnetic field is examined ... -
Synthesis, characterization and structural analysis of isostructural dinuclear molybdenum and tungsten oxo-bis-mu-sulfido-benzenedithiolene complexes
(Elsevier, 2010)Reactions of the molybdenum and tungsten precursors [MO2S2]2? with equimolar amounts of benzenedithiol in acetonitrile give the title compounds [M2O2(?-S)2(bdt)2]2? with M = Mo, W and bdt = benzene-dithiolate. In case a ... -
A comparative study of the oxygen evolution reaction on oxidized nickel, cobalt and iron electrodes in base
(Elsevier, 2010)Despite the recent renewal in interest in the oxygen evolution reaction (OER) at transition metal oxide based electrodes in alkaline solution, the details of the mechanism remain controversial. While most studies focus on ... -
Magnetic field effects in ferrocenealkane thiol self assembled monolayer modified electrodes
(2010)The redox behaviour of well characterized ferrocene alkane thiol self assembled monolayer modified electrodes in contact with aqueous perchlorate solutions both in the absence of and in the presence of an external magnetic ... -
Fluorescent sensing of anions using a bis-quinoxaline amidothiourea based supramolecular cleft; an example of an anion induced deprotonation event
(2010)The quinoxaline 1, possessing a 2,6-pyridyl-based amidothiourea moiety, with the view of forming a pre-organised molecular cleft, was developed as a fluorescent anion sensor. The sensing ability of 1 was evaluated in organic ... -
Lanthanide luminescence sensing of copper and mercury ions using an iminodiacetate based Tb(III)-cyclen chemosensor
(2010)The design, synthesis and photophysical evaluation of 1.Tb.Na, a Tb(III)-cyclen based sensor, possessing a phenyl iminodiacetate based receptor, for the selective detection of Cu(II) and Hg(II) ions in water is demonstrated. ... -
FRET in self-assembled CdTe quantum dot nanoclusters
(IEEE Computer Society Press, 2010)Colloidal CdTe quantum dots (QDs) with oppositely charged ligand shells were used to form quantum dot nanoclusters in solution. The signatures of Forster non-radiative energy transfer in the photoluminescence and time-resolved ...
