Congratulations, Dr Chang!

Our group member Sin-Yuen Chang has passed her PhD viva subject to very minor corrections, and has already submitted the revised thesis, titled “Studies of Metal Speciation and Nucleation in Complex Functional Liquid Systems“. Sin-Yuen has already taken up a position at Diamond Light Source, and a visiting appointment at the University of Leeds, through which she will continue to collaborate with our team. Congratulations , Dr Chang!

JACS paper!

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

Sweet X-ray spectroscopy

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.

2015 Publications So Far…

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

Matt Thomason passed PhD viva

On Friday, 22 March 2013 our group member Matt Thomason passed his PhD examination subject to minor corrections in his PhD thesis, Soft X-ray Spectroscopy of Molecular Species in Solution: Studies of Imidazole and Imidazole/Water Systems.

Congratulations Matt!

Review in Angewandte Chemie: Nucleation of Organic Crystals

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

New publication: gold nanoparticle nucleation at liquid/liquid interfaces

The first publication from the EPSRC/NSF collaboration has appeared in press:

Inhibited and Enhanced Nucleation of Gold Nanoparticles at the Water|1,2-Dichloroethane Interface
Y. Gründer, H.L.T. Ho, J.F.W. Mosselmans, S.L.M. Schroeder, R.A.W. Dryfe
Physical Chemistry Chemical Physics 13 (2011), 15681-15689.
DOI:10.1039/C1CP21536A

Dr Nchari

Congratulations to our research group member Luanga Nchari, who has now fulfilled all requirements for the award of his PhD degree on mechanistic studies of chiral amplification reactions with dialkylzinc reagents.

Oral presentations at CGOM9

Our team will contribute three talks at the 9th International Conference on Crystal Growth of Organic Materials, (CGOM9), 4-7 August in Singapore.

Hamizah will speak about “Surfaces Analysis of Molecular Crystals: Studies of Paracetamol by X-ray Photoelectron Spectroscopy (XPS)

Vicky presents “Polymorphism from a Solution Perspective: Rationalisation at the Molecular Level”.

Sven will summarise our soft X-ray spectroscopy work: “Co-Crystals, Coatings, Contamination and Clusters: Core Level Spectroscopies as a Probe for Local Bonding in Molecular Systems