@article{ThielZehbeRoesneretal.2013, author = {Thiel, Kerstin and Zehbe, Rolf and Roesner, Jer{\^o}m{\´e} and Strauch, Peter and Enthaler, Stephan and Thomas, Arne}, title = {A polymer analogous reaction for the formation of imidazolium and NHC based porous polymer networks}, doi = {10.1039/C2PY20947K}, year = {2013}, abstract = {A polymer analogous reaction was carried out to generate a porous polymeric network with N-heterocyclic carbenes (NHC) in the polymer backbone. Using a stepwise approach, first a polyimine network is formed by polymerization of the tetrafunctional amine tetrakis(4-aminophenyl)methane. This polyimine network is converted in the second step into polyimidazolium chloride and finally to a polyNHC network. Furthermore a porous Cu(II)-coordinated polyNHC network can be generated. Supercritical drying generates polymer networks with high permanent surface areas and porosities which can be applied for different catalytic reactions. The catalytic properties were demonstrated for example in the activation of CO2 or in the deoxygenation of sulfoxides to the corresponding sulfides.}, language = {en} } @article{ThielZehbeRoeseretal.2013, author = {Thiel, Kerstin and Zehbe, Rolf and R{\"o}ser, Jerome and Strauch, Peter and Enthaler, Stephan and Thomas, Arne}, title = {A polymer analogous reaction for the formation of imidazolium and NHC based porous polymer networks}, series = {Polymer Chemistry}, volume = {4}, journal = {Polymer Chemistry}, number = {6}, publisher = {Royal Society of Chemistry}, address = {Cambridge}, issn = {1759-9954}, doi = {10.1039/c2py20947k}, pages = {1848 -- 1856}, year = {2013}, abstract = {A polymer analogous reaction was carried out to generate a porous polymeric network with N-heterocyclic carbenes (NHC) in the polymer backbone. Using a stepwise approach, first a polyimine network is formed by polymerization of the tetrafunctional amine tetrakis(4-aminophenyl)methane. This polyimine network is converted in the second step into polyimidazolium chloride and finally to a polyNHC network. Furthermore a porous Cu(II)-coordinated polyNHC network can be generated. Supercritical drying generates polymer networks with high permanent surface areas and porosities which can be applied for different catalytic reactions. The catalytic properties were demonstrated for example in the activation of CO2 or in the deoxygenation of sulfoxides to the corresponding sulfides.}, language = {en} } @misc{ThielZehbeRoeseretal.2013, author = {Thiel, Kerstin and Zehbe, Rolf and Roeser, Jer{\^o}m{\´e} and Strauch, Peter and Enthaler, Stephan and Thomas, Arne}, title = {A polymer analogous reaction for the formation of imidazolium and NHC based porous polymer networks}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-95118}, pages = {1848 -- 1856}, year = {2013}, abstract = {A polymer analogous reaction was carried out to generate a porous polymeric network with N-heterocyclic carbenes (NHC) in the polymer backbone. Using a stepwise approach, first a polyimine network is formed by polymerization of the tetrafunctional amine tetrakis(4-aminophenyl)methane. This polyimine network is converted in the second step into polyimidazolium chloride and finally to a polyNHC network. Furthermore a porous Cu(II)-coordinated polyNHC network can be generated. Supercritical drying generates polymer networks with high permanent surface areas and porosities which can be applied for different catalytic reactions. The catalytic properties were demonstrated for example in the activation of CO2 or in the deoxygenation of sulfoxides to the corresponding sulfides.}, language = {en} } @article{FischerSchmidtStrauchetal.2013, author = {Fischer, Sabrina and Schmidt, Johannes and Strauch, Peter and Thomas, Arne}, title = {An anionic microporous polymer network prepared by the polymerization of weakly coordinating anions}, series = {Angewandte Chemie : a journal of the Gesellschaft Deutscher Chemiker ; International edition}, volume = {52}, journal = {Angewandte Chemie : a journal of the Gesellschaft Deutscher Chemiker ; International edition}, number = {46}, publisher = {Wiley-VCH}, address = {Weinheim}, issn = {1433-7851}, doi = {10.1002/anie.201303045}, pages = {12174 -- 12178}, year = {2013}, language = {en} } @article{HalaskaPevecStrauchetal.2013, author = {Halaska, Jozef and Pevec, Andrej and Strauch, Peter and Kozlevcar, Bojan and Koman, Marian and Moncol, Jan}, title = {Supramolecular hydrogen-bonding networks constructed from copper(II) chlorobenzoates with nicotinamide - Structure and EPR}, series = {Polyhedron : the international journal of inorganic and organometallic chemistry}, volume = {61}, journal = {Polyhedron : the international journal of inorganic and organometallic chemistry}, publisher = {Elsevier}, address = {Oxford}, issn = {0277-5387}, doi = {10.1016/j.poly.2013.05.032}, pages = {20 -- 26}, year = {2013}, abstract = {Nicotinamide (nia) has been employed as a supramolecular reagent in the synthesis of four copper(II) chloro- and dichlorobenzoate (Clbz/Cl(2)bz) complexes. The structures of the compounds [Cu(2-Clbz)(2) (nia)(2)(H2O)(2)] (1), icu(4-clbz)(2)(nia)(2)(H2O)(2)] (2), [Cu(3,5-Cl(2)bz)(2)(nia)(2)(H2O)(2)] (3), and [Cu(2,5-Cl(2)bz)(2) (nia)(2)(H2O)]center dot H2O (4) were determined. All the investigated compounds 1-4 reveal water molecules as coordinated. Their structures show distorted octahedral chromophores (CuN2O2O)-N-II'(2), though some are better described as square-planar or square-pyramid due to a large deviation of the axial ligand away from the octahedral z-axis along with different Cu center dot center dot center dot O (axial) lengths. The equatorial positions are occupied in all four cases by two nitrogen (nia-py) atoms and two carboxylate oxygen atoms of two Clbz/Cl(2)bz ligands, while the axial positions are occupied by water molecules. The EPR spectra reveal for all 1-4 compounds a spin state of S = 1/2, mostly with axial symmetry of the spectra. Their resolution is clearly dependant to the crystal symmetry related equivalence of the magnetic sites. The coordination molecules of all compounds are connected by N-H center dot center dot center dot O and O-H center dot center dot center dot O H-bonds from nicotinamide NH2 groups, carboxylate anions and/or water molecules, which create supramolecular chains or further H-bonded into 2D sheets. Steric hindering of the chlorine atoms of the Clbz/Cl(2)bz, especially seen at the coordination of the water molecules, demonstrates its role at the coordination sphere appearance. Despite this influence, the water molecules in 1-4 always assist at the similar supramolecular H-bonded network, almost at the same manner.}, language = {en} } @misc{WinterThielZabeletal.2013, author = {Winter, Alette and Thiel, Kerstin and Zabel, Andr{\´e} and Klamroth, Tillmann and P{\"o}ppl, Andreas and Kelling, Alexandra and Schilde, Uwe and Taubert, Andreas and Strauch, Peter}, title = {Tetrahalidocuprates(II) - structure and EPR spectroscopy}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-95012}, pages = {1019 -- 1030}, year = {2013}, abstract = {We present and discuss the results of crystallographic and electron paramagnetic resonance (EPR) spectroscopic analyses of five tetrachloridocuprate(II) complexes to supply a useful tool for the structural characterisation of the [CuCl4]2- moiety in the liquid state, for example in ionic liquids, or in solution. Bis(benzyltriethylammonium)-, bis(trimethylphenylammonium)-, bis(ethyltriphenylphosphonium)-, bis(benzyltriphenylphosphonium)-, and bis(tetraphenylarsonium)tetrachloridocuprate(II) were synthesised and characterised by elemental, IR, EPR and X-ray analyses. The results of the crystallographic analyses show distorted tetrahedral coordination geometry of all [CuCl4]2- anions in the five complexes and prove that all investigated complexes are stabilised by hydrogen bonds of different intensities. Despite the use of sterically demanding ammonium, phosphonium and arsonium cations to obtain the separation of the paramagnetic Cu(II) centres for EPR spectroscopy no hyperfine structure was observed in the EPR spectra but the principal values of the electron Zeeman tensor, g∥ and g⊥, could be determined. With these EPR data and the crystallographic parameters we were able to carry out a correlation study to anticipate the structural situation of tetrachloridocuprates in different physical states. This correlation is in good agreement with DFT calculations.}, language = {en} }