By admin, on November 20th, 2015% Under leadership of Akihiro Uehara a combined electrochemical/X-ray absorption spectroscopy study deconstructing the famous Brust-Schiffrin synthesis of gold nanoparticles has been carried out. The results elucidates some of the transformations taking place during this two-phase synthesis. The results show that the reaction at the oil-water interface includes a time dependent evolution of the Au(I) species formed as intermediates, and identifies the nature of the (also time dependent) thiolate side products.
Electrochemical Insight into the Brust-Schiffrin Synthesis of Au Nanoparticles
A. Uehara, S. G. Booth, S.-Y. Chang, S. L. M. Schroeder, T. Imai, T. Hashimoto, J. F. W. Mosselmans & R. A. W. Dryfe
Journal of the American Chemical Society 137 (2015) 15135–15144.
DOI: 10.1021/jacs.5b07825
Last updated: 9th December, 2015
By admin, on October 17th, 2015% We have just published a study of sustainable heavy metal removal from copper mining effluents in Chile by use of bark chips, a sustainable by-product of the local forestry industry.
Sustainable Natural Adsorbents for Heavy Metal Removal from Wastewater: Lead Sorption on Pine Bark (Pinus Radiata D.Don)
G. Montes-Atenas & S. L. M. Schroeder
Surface & Interface Analysis 47 (2015) 996-1000.
DOI: 10.1002/sia.5807
Last updated: 17th October, 2015
By admin, on October 13th, 2015% We recently realised that Near-edge X-ray absorption fine-structure (NEXAFS) spectroscopy at the C K-edge can distinguish between different saccharides because minute variations in average C-O bond lengths manifest as detectable shifts of the shape resonances associated with these bonds. This opens up the possibility for novel analytical approaches, for example to identify different types of sugars in drug formulations or foods:
NEXAFS Sensitivity to Bond Lengths in Complex Molecular Materials: A Study of Crystalline Saccharides
A. Gainar, J. S. Stevens, C. Jaye, D. A. Fischer & S. L. M. Schroeder
Journal of Physical Chemistry B 119 (2015), in press.
Last updated: 17th October, 2015
By admin, on October 9th, 2015% The group has had a good run of publications this year. So far our 2015 output of papers includes:
Intermolecular Bonding of Hemin in Solution and in Solid State Probed by N K-edge X-ray Spectroscopies
R. Golnak, J. Xiao, K. Atak, J. S. Stevens, A. Gainar, S. L. M. Schroeder & E. F. Aziz
Physical Chemistry – Chemical Physics 17 (2015), accepted.
DOI: 10.1039/C5CP04529K |
Fenton-Like Oxidation of 4−Chlorophenol: Homogeneous or Heterogeneous?
C.-C. Kuan, S.-Y. Chang, S. L. M. Schroeder
Industrial & Engineering Chemistry Research 54 (2015) 8122–8129.
DOI: 10.1021/acs.iecr.5b02378 |
Gold Deposition at a Free-Standing Liquid/Liquid Interface, Evidence for the Formation of Au(I) by Microfocus X-ray Spectroscopy (μXRF and μXAFS) and Cyclic Voltammetry
S. G. Booth, A. Uehara, S.-Y. Chang, J. F. W. Mosselmans, S. L. M. Schroeder, R. A. W. Dryfe
Journal of Physical Chemistry C 119 (2015) 16785–16792.
DOI: 10.1021/acs.jpcc.5b05127 |
Synthesis of Polyurea-Polyether Core Shell Nanoparticles via Spontaneous Nanoprecipitation
P. Locatelli, S. Woutters, C. Lindsay, S. L. M. Schroeder, J. H. Hobdell & A. Saiani
RSC Advances 5 (2015) 41668-41676.
DOI: 10.1039/c5ra03662c |
Structure and Bonding in Au(I) Chloride Species: A Critical Examination of X-ray Absorption Spectroscopy (XAS) Data
S.-Y. Chang, A. Uehara, S. G. Booth, K. Ignatyev, J. F. W. Mosselmans, R. A. W. Dryfe, S. L. M. Schroeder
RSC Advances 5 (2015) 6912-6918.
DOI: 10.1039/C4RA13087A |
Proton Transfer, Hydrogen Bonding, and Disorder: Nitrogen NEXAFS and XPS of Bipyridine-Acid Salts and Co-crystals
J. S. Stevens, L. K. Newton, C. Jaye, C. A. Muryn, D. A. Fischer & S. L. M. Schroeder
Crystal Growth & Design 15 (2015) 1776-1783.
DOI: 10.1021/cg5018278 |
Self-Association of Organic Solutes in Solution: A NEXAFS Study of Aqueous Imidazole
M. J. Thomason, C. R. Seabourne, B. M. Sattelle, G. A. Hembury, J. S. Stevens, A. J. Scott, E. F. Aziz & S. L. M. Schroeder
Faraday Discussions 179 (2015) 269-289..
DOI: 10.1039/C5FD00005J |
Chemical Speciation and Bond Lengths of Organic Solutes by Core Level
Spectroscopy: pH- and Solvent-Influence on p-Aminobenzoic Acid
J. S. Stevens, A. Gainar, E. Suljoti, J. Xiao, R. Golnak, E. F. Aziz & S. L. M. Schroeder
Chemistry – A European Journal 21 (2015) 7256-7263.
DOI: 10.1002/chem.201405635 |
Last updated: 10th October, 2015
By admin, on January 13th, 2014% We have published an XPS study comparing two methods for poly-caprolactone surface functionalisation with cell-binding RGD peptides.
Immobilisation of Cell-Binding Peptides on Poly-ε-Caprolactone (PCL) Films: A Comparative XPS Study of Two Chemical Surface Functionalisation Methods
J.S. Stevens, A.C. de Luca, S. Downes, G. Terenghi, S.L.M. Schroeder
Surface and Interface Analysis (2014) early view.
DOI:10.1002/sia.5396
Last updated: 24th January, 2014
By admin, on December 18th, 2013% Two papers from our group have been accepted recently:
Conservation of Artists’ Acrylic Emulsion Paints: XPS, NEXAFS and ATR FTIR Studies of Wet Cleaning Methods
E.A. Willneff, B.A. Ormsby, J.S. Stevens, C. Jaye, D.A. Fischer, S.L.M. Schroeder
Surface and Interface Analysis (2014), early view.
DOI:10.1002/sia.5376
Proton Transfer and Hydrogen Bonding in the Organic Solid State: A Combined XRD/XPS/ssNMR Study of 17 Organic Acid-Base Complexes
J.S. Stevens, S.J. Byard, C.S. Seaton, G. Sadiq, R.J. Davey, S.L.M. Schroeder
Physical Chemistry Chemical Physics 16 (2014) 1150-1160.
DOI:10.1039/C3CP53907E
Last updated: 19th February, 2014
By admin, on March 8th, 2013% A windowless electrochemical cell for the spectroscopic investigation of the liquid-liquid interface, using a dual droplet configuration, has been designed. The setup permits in situ probing of the bulk solutions and the interfacial region by fibre-optic UV-vis spectroscopy, microfocus X-ray fluorescence (XRF) elemental mapping, and microfocus X-ray absorption near-edge structure (micro-XANES) spectroscopy. The electrodeposition of Au, induced by ion transfer of the tetrachloroaurate complex from a halogenated solvent (containing a weak reducing agent) to the aqueous phase, has been monitored by a combination of the three techniques. The reaction can be followed in-situ by UV-vis spectroscopy by detecting the oxidised form of the reducing agent. Voltammetric evidence suggests the formation of interfacial Au(I) species, whereas micro-XANES detect the presence of metallic Au(0).
In Situ Spectroelectrochemistry at Free-Standing Liquid-Liquid Interfaces: UV-vis Spectroscopy, Microfocus X-ray Absorption Spectroscopy and Fluorescence Imaging
Y. Gründer, J.F.W. Mosselmans, S.L.M. Schroeder & R.A.W. Dryfe
Journal of Physical Chemistry C 117 (2013), 5765–5773.
DOI:10.1021/jp312060f
Last updated: 10th April, 2013
By admin, on February 13th, 2013% Having made some unexpected impact with our 2009 Surface and Interface Analysis paper on the XPS of saccharides (see here), we are now publishing a conceptually similar paper, this time dealing with the XPS of several amino acids and peptides derived from them:
Quantitative Analysis of Complex Amino Acids and RGD Peptides by X-ray Photoelectron Spectroscopy (XPS)
J.S. Stevens, A.C. de Luca, M. Pelendritis, G. Terenghi, S. Downes, S.L.M. Schroeder
Surface and Interface Analysis (2013), in press.
DOI: to be confirmed
Last updated: 13th February, 2013
By admin, on January 16th, 2013% Roger and Sven, together with Joop ter Horst (University of Delft), have published a review in Angewandte Chemie:
Nucleation of Organic Crystals – A Molecular Perspective
R.J. Davey, S.L.M. Schroeder & J.H. ter Horst
Angewandte Chemie – International Edition 52 (2013) 2166–2179.
DOI:10.1002/anie.201204824
German version:
Keimbildung organischer Kristalle aus molekularer Sichtweise
R.J. Davey, S.L.M. Schroeder & J.H. ter Horst
Angewandte Chemie 125 (2013) 2220–2234.
DOI:10.1002/ange.201204824
Last updated: 22nd February, 2013
By admin, on November 11th, 2012% A joint paper with NNL on uranium/plutonium dioxide dissolution in nitric acid has been published.
The Chemistry of (U,Pu)O2 Dissolution in Nitric Acid
M.J. Carrott, P.M.A. Cook, O.D. Fox, C.J. Maher & S.L.M. Schroeder
Procedia Chemistry 7 (2012) 92-97.
DOI:10.1016/j.proche.2012.10.017
Last updated: 11th November, 2012
|
|
Comments are closed 
