TY  - JOUR
A1  - Dietrich, Paul M.
A1  - Glamsch, Stephan
A1  - Ehlert, Christopher
A1  - Lippitz, Andreas
A1  - Kulak, Nora
A1  - Unger, Wolfgang E. S.
T1  - Synchrotron-radiation XPS analysis of ultra-thin silane films: Specifying the organic silicon
JF  - Applied surface science : a journal devoted to applied physics and chemistry of surfaces and interfaces
N2  - The analysis of chemical and elemental in-depth variations in ultra-thin organic layers with thicknesses below 5 nm is very challenging. Energy- and angle-resolved XPS (ER/AR-XPS) opens up the possibility for non-destructive chemical ultra-shallow depth profiling of the outermost surface layer of ultra-thin organic films due to its exceptional surface sensitivity. For common organic materials a reliable chemical in-depth analysis with a lower limit of the XPS information depth z(95) of about 1 nm can be performed. As a proof-of-principle example with relevance for industrial applications the ER/AR-XPS analysis of different organic monolayers made of amino- or benzamidosilane molecules on silicon oxide surfaces is presented. It is demonstrated how to use the Si 2p core-level region to non-destructively depth-profile the organic (silane monolayer) - inorganic (SiO2/Si) interface and how to quantify Si species, ranging from elemental silicon over native silicon oxide to the silane itself. The main advantage of the applied ER/AR-XPS method is the improved specification of organic from inorganic silicon components in Si 2p core-level spectra with exceptional low uncertainties compared to conventional laboratory XPS. (C) 2015 Elsevier B.V. All rights reserved.
KW  - Synchrotron radiation XPS
KW  - Depth profiling
KW  - Silanes
KW  - Monolayer
KW  - Amines
KW  - Amides
Y1  - 2016
U6  - https://doi.org/10.1016/j.apsusc.2015.12.052
SN  - 0169-4332
SN  - 1873-5584
VL  - 363
SP  - 406
EP  - 411
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Schaffer, Mario
A1  - Idzik, Krzysztof R.
A1  - Wilke, Max
A1  - Licha, Tobias
T1  - Amides as thermo-sensitive tracers for investigating the thermal state of geothermal reservoirs
JF  - Geothermics : an international journal of geothermal research and its applications
N2  - The application of thermo-sensitive tracers is a promising technique for evaluating the thermal state of geothermal reservoirs. To extend the compound spectrum for hydrolyzable compounds to reservoir temperatures between 100 and 200 degrees C carboxamides were studied. The kinetic parameters of 17 self-synthesized amides were determined in hydrothermal batch and autoclave experiments. The influence of the molecular structure and the role of pH/pOH on hydrolysis kinetics were studied. Additionally, the thermal stabilities of the hydrolysis products were evaluated. The results demonstrate the high potential of tracers based on amide hydrolysis for use in medium enthalpy reservoirs. (C) 2016 Elsevier Ltd. All rights reserved.
KW  - Thermo-sensitive tracers
KW  - Amides
KW  - Hydrolysis
KW  - Kinetics
KW  - Reservoir temperature
KW  - Molecular design
Y1  - 2016
U6  - https://doi.org/10.1016/j.geothermics.2016.05.004
SN  - 0375-6505
SN  - 1879-3576
VL  - 64
SP  - 180
EP  - 186
PB  - Elsevier
CY  - Oxford
ER  - 
TY  - JOUR
A1  - Schmidt, Bernd
A1  - Elizarov, Nelli
A1  - Riemer, Nastja
A1  - Hölter, Frank
T1  - Acetamidoarenediazonium Salts: Opportunities for Multiple Arene Functionalization
JF  - European journal of organic chemistry
N2  - Unlike their ortho counterparts, meta- and para-acetamidoanilines can be converted into the corresponding acetamidoarenediazonium salts. These offer various opportunities for multiple Pd-catalyzed arene functionalization reactions, such as Matsuda-Heck-, Suzuki-Miyaura- or Fujiwara-Moritani couplings.
KW  - Arenes
KW  - Amides
KW  - C-C coupling
KW  - Cross-coupling
KW  - Palladium
Y1  - 2015
U6  - https://doi.org/10.1002/ejoc.201500795
SN  - 1434-193X
SN  - 1099-0690
IS  - 26
SP  - 5826
EP  - 5841
PB  - Wiley-VCH
CY  - Weinheim
ER  -