Licha, Tobias

[["dc.bibliographiccitation.firstpage","57"],["dc.bibliographiccitation.journal","Electrochimica Acta"],["dc.bibliographiccitation.lastpage","65"],["dc.bibliographiccitation.volume","122"],["dc.contributor.author","Machata, Peter"],["dc.contributor.author","Rapta, Peter"],["dc.contributor.author","Lukes, Vladimir"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Beckert, Rainer"],["dc.contributor.author","Dunsch, Lothar"],["dc.date.accessioned","2018-11-07T09:42:37Z"],["dc.date.available","2018-11-07T09:42:37Z"],["dc.date.issued","2014"],["dc.description.abstract","A detailed spectroelectrochemical and theoretical study of thienyl derivatives based on pyrene, namely 1-(2-thienyl)-pyrene (1), 1,6-bis(2-thienyl)-pyrene (2), 1,4-bis(2-thienyl)-pyrene (3), 1,3,6-tris(2-thienyl)-pyrene (4) and 1,3,6,8-tetra(2-thienyl)-pyrene (5), and their oxidation products with focus on the formation of their corresponding cationic states are presented. Regioregular polymeric systems were prepared by means of electrochemical polymerization from monomers 2-4. The redox behavior of the corresponding polymers was studied by cyclic voltammetry and in situ EPR/UV-vis-NIR spectroelectrochemistry with the aim of obtaining details on the type of charge carriers within the polymer film. Quantum chemical calculations of the optimal geometries and optical transitions for the neutral and charged forms were performed in order to reveal the influence of electrochemical oxidation on the molecular structure of the monomers and corresponding dimers and/or polymers. (C) 2013 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.electacta.2013.08.045"],["dc.identifier.isi","000334007900009"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33999"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1873-3859"],["dc.relation.issn","0013-4686"],["dc.relation.workinggroup","RG Techert (Structural Dynamics in Chemical Systems)"],["dc.title","Regioregular electrochromic polymers based on thienyl derivatives of fluorescent pyrene monomers: Optical properties, spectroelectrochemistry and quantum chemical study"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","154"],["dc.bibliographiccitation.journal","Electrochimica Acta"],["dc.bibliographiccitation.lastpage","161"],["dc.bibliographiccitation.volume","79"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.contributor.author","Frydel, Jaroslaw"],["dc.contributor.author","Beckert, Rainer"],["dc.contributor.author","Ledwon, Przemyslaw"],["dc.contributor.author","Lapkowski, Mieczyslaw"],["dc.contributor.author","Fasting, Carlo"],["dc.contributor.author","Mueller, Carsten"],["dc.contributor.author","Licha, Tobias"],["dc.date.accessioned","2018-11-07T09:05:42Z"],["dc.date.available","2018-11-07T09:05:42Z"],["dc.date.issued","2012"],["dc.description.abstract","A series of various tris(2,2'-bithiophen-5-yl)-aromatic derivatives were synthesized by Stille cross-coupling procedure. Their structures were characterized by H-1 NMR, C-13 NMR, and elemental analysis. DFT calculations for monomers were also performed. The optical properties of the synthesized materials as well as their energy levels were investigated by UV-vis absorption supported by fluorescence spectra and CV analysis. Oligomers obtained in the process of electropolymerization, possess a tetrathienyl bond with various aromatic and heteroaromatic cores. Electrochemical results confirm that the gained materials can apply successfully for a diversity of organic-electronic devices like organic light-emitting diodes (OLEDs), organic field-effect transistors (OFETs), and organic solar cells. (C) 2012 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.electacta.2012.06.101"],["dc.identifier.isi","000307920300020"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/25386"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0013-4686"],["dc.title","Synthesis and electrochemical properties of tetrathienyl-linked branched polymers with various aromatic cores"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","6650"],["dc.bibliographiccitation.issue","17"],["dc.bibliographiccitation.journal","Water Research"],["dc.bibliographiccitation.lastpage","6659"],["dc.bibliographiccitation.volume","47"],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Hillebrand, Olav"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.contributor.author","Strathmann, Martin"],["dc.contributor.author","Schiperski, Ferry"],["dc.contributor.author","Zirlewagen, Johannes"],["dc.contributor.author","Licha, Tobias"],["dc.date.accessioned","2018-11-07T09:17:54Z"],["dc.date.available","2018-11-07T09:17:54Z"],["dc.date.issued","2013"],["dc.description.abstract","The substantial transformation of the angiotensin II receptor antagonist valsartan to the transformation product 2'-(2H-tetrazol-5-yl)-[1,1'-biphenyl]-4-carboxylic acid (referred to as valsartan acid) during the activated sludge process was demonstrated in the literature and confirmed in the here presented study. However, there was a severe lack of knowledge regarding the occurrence and fate of this compound in surface water and its behavior during drinking water treatment. In this work a comparative study on the occurrence and persistency of valsartan acid, three frequently used beta-blockers (metoprolol, atenolol, and sotalol), atenolol acid (one significant transformation product of atenolol and metoprolol), and the two widely distributed persistent anthropogenic wastewater indicators carbamazepine and acesulfame in raw sewage, treated wastewater, surface water, groundwater, and tap water is presented. Median concentrations of valsartan acid in the analyzed matrices were 101, 1,310, 69, <1.0, and 65 ng L-1, respectively. Treated effluents from wastewater treatment plants were confirmed as significant source. Regarding concentration levels of pharmaceutical residues in surface waters valsartan acid was found just as relevant as the analyzed beta-blockers and the anticonvulsant carbamazepine. Regarding its persistency in surface waters it was comparable to carbamazepine and acesulfame. Furthermore, removal of valsartan acid during bank filtration was poor, which demonstrated the relevance of this compound for drinking water suppliers. Regarding drinking water treatment (Muelheim Process) the compound was resistant to ozonation but effectively eliminated (>= 90%) by subsequent activated carbon filtration. However, without applying activated carbon filtration the compound may enter the drinking water distribution system as it was demonstrated for Berlin tap water. (C) 2013 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.watres.2013.08.034"],["dc.identifier.isi","000327911700023"],["dc.identifier.pmid","24070867"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28285"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.relation.issn","0043-1354"],["dc.title","Occurrence and fate of the angiotensin II receptor antagonist transformation product valsartan acid in the water cycle - A comparative study with selected beta-blockers and the persistent anthropogenic wastewater indicators carbamazepine and acesulfame"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","133"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Synthetic Communications"],["dc.bibliographiccitation.lastpage","140"],["dc.bibliographiccitation.volume","44"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Licha, Tobias"],["dc.date.accessioned","2018-11-07T09:45:18Z"],["dc.date.available","2018-11-07T09:45:18Z"],["dc.date.issued","2014"],["dc.description.abstract","A series of various readily water-soluble amides were synthesized by different procedures. These compounds are useful chemical tracers for assessing the cooling progress in a georeservoir during geothermal power plant operation. Acylation of primary amines was carried out by basically employing the Schotten-Baumann method. As a second method a single-phase solvent system consisting of ethyl acetate as an organic solvent and triethylamine as a catalyst was used. Products were characterized by H-1 NMR and C-13 NMR. [Supplementary materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) for the following free supplemental resource(s): Full experimental and spectral details.]"],["dc.description.sponsorship","German Ministry of Environment (BMU) [0325417]"],["dc.identifier.doi","10.1080/00397911.2013.794900"],["dc.identifier.isi","000325514400014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/34585"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1532-2432"],["dc.relation.issn","0039-7911"],["dc.relation.workinggroup","RG Techert (Structural Dynamics in Chemical Systems)"],["dc.title","Efficient Synthesis of Readily Water-Soluble Amides Containing Sulfonic Groups"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","55"],["dc.bibliographiccitation.journal","Dyes and Pigments"],["dc.bibliographiccitation.lastpage","61"],["dc.bibliographiccitation.volume","103"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.contributor.author","Ledwon, Przemyslaw"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Kuznik, Wojciech"],["dc.contributor.author","Lapkowski, Mieczyslaw"],["dc.contributor.author","Frydel, Jaroslaw"],["dc.date.accessioned","2018-11-07T09:42:19Z"],["dc.date.available","2018-11-07T09:42:19Z"],["dc.date.issued","2014"],["dc.description.abstract","A series of various furyl derivatives of pyrene were synthesized by Stille cross-coupling procedure. Their structures were characterized by nuclear magnetic resonance, and elemental analysis. Optical properties of the synthesized materials as well as their energy levels were investigated by ultraviolet-visible absorption supported by fluorescence spectra. All of the studied compounds exhibit fluorescence with energy peaks dependent on the number of furyl substituents. Furthermore, quantum mechanical modeling method of obtained materials are studied. Experimental data are focused on quantum chemical calculations. Highest occupied molecular and lowest unoccupied molecular orbitals are delocalized uniformly on both pyrene core and furyl substituents. Furanyl-pyrene hybrids are potentially good materials for optical applications mainly due to their optical and charge transport properties, which are also desired for electronic applications. (C) 2013 Published by Elsevier Ltd."],["dc.identifier.doi","10.1016/j.dyepig.2013.11.005"],["dc.identifier.isi","000331781600008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33931"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1873-3743"],["dc.relation.issn","0143-7208"],["dc.relation.workinggroup","RG Techert (Structural Dynamics in Chemical Systems)"],["dc.title","Furyl derivatives of pyrene: Efficient synthesis and relevant optical properties"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","74"],["dc.bibliographiccitation.journal","Synthetic Metals"],["dc.bibliographiccitation.lastpage","82"],["dc.bibliographiccitation.volume","191"],["dc.contributor.author","Ledwon, Przemyslaw"],["dc.contributor.author","Lapkowski, Mieczyslaw"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Frydel, Jaroslaw"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.date.accessioned","2018-11-07T09:40:41Z"],["dc.date.available","2018-11-07T09:40:41Z"],["dc.date.issued","2014"],["dc.description.abstract","This paper estimates the influence of substituents number on basic electrochemical, optical and electronic properties of monomers compared to their polymers. Results exhibit differences of these effects in monomers and polymers. The crosslinking effect has impact on basic properties of studied polymers. Polymers were created from their monomers by electropolymerization. Optical properties of a series of furyl derivatives of pyrene were investigated by UV-vis spectroscopy. Basic electrochemical properties of the studied compounds were investigated by cyclic voltammetry. ESR-UV-vis spectroelectrochemistry reveals differences in doping processes of obtained conjugated polymers. Good electrochemical stability of novel furyl-pyren pi-conjugated polymers confirm the application potential of this group of materials for the development of organic semiconductors in particularly for possible applications in electrochromic devices, light emitting electrochemical cells and spintronic. (C) 2014 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.synthmet.2014.02.017"],["dc.identifier.isi","000336349800012"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33562"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0379-6779"],["dc.relation.workinggroup","RG Techert (Structural Dynamics in Chemical Systems)"],["dc.title","The role of furyl substituents of pyrene on monomer and polymer properties"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","180"],["dc.bibliographiccitation.journal","Geothermics"],["dc.bibliographiccitation.lastpage","186"],["dc.bibliographiccitation.volume","64"],["dc.contributor.author","Schaffer, Mario"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.contributor.author","Wilke, Max"],["dc.contributor.author","Licha, Tobias"],["dc.date.accessioned","2018-11-07T10:06:26Z"],["dc.date.available","2018-11-07T10:06:26Z"],["dc.date.issued","2016"],["dc.description.abstract","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."],["dc.identifier.doi","10.1016/j.geothermics.2016.05.004"],["dc.identifier.isi","000387518100014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39095"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1879-3576"],["dc.relation.issn","0375-6505"],["dc.relation.workinggroup","RG Techert (Structural Dynamics in Chemical Systems)"],["dc.title","Amides as thermo-sensitive tracers for investigating the thermal state of geothermal reservoirs"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","153"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Journal of Fluorescence"],["dc.bibliographiccitation.lastpage","160"],["dc.bibliographiccitation.volume","24"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Lukes, Vladimir"],["dc.contributor.author","Rapta, Peter"],["dc.contributor.author","Frydel, Jaroslaw"],["dc.contributor.author","Schaffer, Mario"],["dc.contributor.author","Taeuscher, Eric"],["dc.contributor.author","Beckert, Rainer"],["dc.contributor.author","Dunsch, Lothar"],["dc.date.accessioned","2018-11-07T09:46:21Z"],["dc.date.available","2018-11-07T09:46:21Z"],["dc.date.issued","2014"],["dc.description.abstract","A series of various thienyl derivatives of pyrene were synthesized by Stille cross-coupling procedure. Their structures were characterized by H-1 NMR, C-13 NMR and elemental analysis. The spectroscopic characteristics were investigated by UV-vis absorption and fluorescence spectra. Based on quantum chemical calculations, the energy levels of investigated molecules with respect to the pyrene molecule were also discussed."],["dc.identifier.doi","10.1007/s10895-013-1281-z"],["dc.identifier.isi","000334110900018"],["dc.identifier.pmid","23918598"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/34850"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1573-4994"],["dc.relation.issn","1053-0509"],["dc.relation.workinggroup","RG Techert (Structural Dynamics in Chemical Systems)"],["dc.title","Synthesis and Optical Properties of Various Thienyl Derivatives of Pyrene"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","22758"],["dc.bibliographiccitation.issue","35"],["dc.bibliographiccitation.journal","Physical Chemistry Chemical Physics"],["dc.bibliographiccitation.lastpage","22769"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.contributor.author","Cywinski, Piotr J."],["dc.contributor.author","Kuznik, Wojciech"],["dc.contributor.author","Frydel, Jaroslaw"],["dc.contributor.author","Licha, Tobias"],["dc.contributor.author","Ratajczyk, Tomasz"],["dc.date.accessioned","2018-11-07T10:03:00Z"],["dc.date.available","2018-11-07T10:03:00Z"],["dc.date.issued","2015"],["dc.description.abstract","A detailed electrochemical, photophysical and theoretical study is presented for various new thienyl and furyl derivatives of pyrene. Their optical properties are described based on UV-VIS absorption and both steady-state and time-resolved fluorescence spectroscopy. DFT and TDDFT calculations are also presented to support experimental data. The calculations results show that HOMO-LUMO orbitals are delocalized uniformly between aromatic core and aryl substituents. Good electrochemical stability of thienyl and furyl hybrids of pyrene confirm their potential application for light emitting electrochemical cells or spintronics mainly due to their beneficial optical and charge transport properties in electrochromic devices. In order to demonstrate this potential, an OLED device is presented. Synthesized compounds included in this OLED device both facilitate electron transport and act as a light emitting layer."],["dc.identifier.doi","10.1039/c5cp03013g"],["dc.identifier.isi","000360448300035"],["dc.identifier.pmid","26257127"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12603"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38349"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1463-9084"],["dc.relation.issn","1463-9076"],["dc.relation.workinggroup","RG Techert (Structural Dynamics in Chemical Systems)"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0/"],["dc.title","The optical properties and quantum chemical calculations of thienyl and furyl derivatives of pyrene"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","21022"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Molecules"],["dc.bibliographiccitation.lastpage","21033"],["dc.bibliographiccitation.volume","19"],["dc.contributor.author","Idzik, Krzysztof R."],["dc.contributor.author","Noedler, Karsten"],["dc.contributor.author","Maier, Friedrich"],["dc.contributor.author","Licha, Tobias"],["dc.date.accessioned","2018-11-07T09:31:50Z"],["dc.date.available","2018-11-07T09:31:50Z"],["dc.date.issued","2014"],["dc.description.abstract","A series of various readily water soluble esters were synthesized by a very efficient procedure. These compounds can be useful as thermosensitive tracers for studying the cooling progress in a low enthalpy georeservoir exploitable by double flash geothermal power plant systems. The kinetics of their hydrolysis was investigated. Acylation of primary alcohols or phenols was carried out by a method based on a single-phase solvent system consisting of ethyl acetate acting as an organic solvent and triethylamine acting as a catalyst. Products were characterized by H-1-NMR, and C-13-NMR."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2015"],["dc.identifier.doi","10.3390/molecules191221022"],["dc.identifier.isi","000346793200101"],["dc.identifier.pmid","25517341"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11464"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31622"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","1420-3049"],["dc.relation.orgunit","Fakultät für Geowissenschaften und Geographie"],["dc.relation.workinggroup","RG Techert (Structural Dynamics in Chemical Systems)"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Efficient Synthesis and Reaction Kinetics of Readily Water Soluble Esters Containing Sulfonic Groups"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]