@article{Mickler2000, author = {Mickler, Wulfhard}, title = {Abtrennung von Schwermetallen aus Deponiesickerw{\"a}ssern durch Reaktivextraktion}, year = {2000}, abstract = {Am Beispiel eines modellierten Deponiesickerwassers wird die M{\"o}glichkeit einer simultanen Reaktivextraktion von toxischen Schwermetallen aus einer unproblematischen Matrix vorgestellt. Als Extraktionsmittel werden vergleichend Alkylphosphors{\"a}uren (kommerzielle D2EHPA, D2EHTPA), ß-Diketone, 4-Acylpyrazol-5-one und eine neuartige kommerzielle Alkylphosphons{\"a}ure eingesetzt. Die thermodynamischen Parameter der Extraktion lassen sich mit Hilfe der Funktionen \%E = f( t, pH), lg D = f ( pH, cL) bestimmen. Einfl{\"u}sse von L{\"o}sungsmitteln und konkurrierende Komplexbildner in der w{\"a}ßrigen Phase auf das Verteilungsgleichgewicht werden diskutiert. Inhaltsstoffe der w{\"a}ßrigen Phase (Cyanid, Tartrat, Ammoniak, Humins{\"a}uren oder Chlorid) beeinflussen entsprechend ihrer Ligandst{\"a}rke die Metallabtrennung. F{\"u}r den Fall der Humins{\"a}ure wird eine Gr{\"o}ßenordnung von Weins{\"a}ure gefunden. Sulfationen erschweren zus{\"a}tzlich die Extraktion von Calcium. Halogenierte und aromatische Verd{\"u}nnungsmittel haben gegen{\"u}ber unproblematischen Kohlenwasserstoffen keinen Vorteil. Mit Aminomethylphosphons{\"a}ure (Ironex, BASF) gelingt eine quantitative Eisen, Indium- und Galliumabtrennung bei einem pH-Wert kleiner 1.5 als ML2(HL) bzw. ML(HL)2. Kupfer und Zink werden im pH-Bereich von 4-6 quantitativ als 1:2- Komplex extrahiert. Insgesamt g{\"u}nstige Ergebnisse zeigen die ß-Diketone (auch LIX 54) und 4-Acylpyrazol-5-one. Hier ergibt sich die M{\"o}glichkeit toxische Schwermetalle selektiv abzutrennen und eine unproblematische Matrix zu gewinnen, da Calcium nur zu 6\% und Magnesium zu 23\% extrahiert werden.}, language = {de} } @article{Mickler1999, author = {Mickler, Wulfhard}, title = {Abtrennung von Schwermetallen aus Deponiesickerw{\"a}ssern durch Reaktivextraktion}, isbn = {3- 9805032-7-5}, year = {1999}, language = {de} } @article{Mickler1999, author = {Mickler, Wulfhard}, title = {Reactive Liquid-Liquid-Extraction of heavy metals from Landfill Leachate}, isbn = {3-924763-80-1}, year = {1999}, language = {en} } @article{MicklerMoennerUhlemannetal.1999, author = {Mickler, Wulfhard and M{\"o}nner, Anke and Uhlemann, Erhard and Wilke, S. and M{\"u}ller, H.}, title = {Transfer of ß-diketone and 4-acylpyrazolone anions across the electrified water nitrobenzene interface}, year = {1999}, language = {en} } @article{SchwarzeMicklerDoscheetal.2010, author = {Schwarze, Thomas and Mickler, Wulfhard and Dosche, Carsten and Flehr, Roman and Klamroth, Tillmann and L{\"o}hmannsr{\"o}ben, Hans-Gerd and Saalfrank, Peter and Holdt, Hans-J{\"u}rgen}, title = {Systematic investigation of photoinduced electron transfer controlled by internal charge transfer and its consequences for selective PdCl2 coordination}, issn = {0947-6539}, doi = {10.1002/chem.200902281}, year = {2010}, abstract = {Fluoroionophores of fluorophore-spacer-receptor format were prepared for detection of PdCl2 by fluorescence enhancement. The fluorophore probes 1-13 consist of a fluorophore group, in alkyl spacer and a dithiomaleonitrile PdCl2 receptor. First, varying the length of the alkylene spacer (compounds 1-3) revealed, dominant through-space pathway for oxidative photoinduced electron transfer (PET) in CH2-bridged dithiomaleonitrile fluoroionophores. Second. fluorescent probes 4-9 containing two anthracene or pyrene fragments connected through CH2 bridges to the dithiomaleonitrile unit were synthesized. Modulation of the oxidation potential (E-Ox) through electron-withdrawing or -donating groups on the anthracene moiety regulates file thermodynamic driving force for oxidative PET (Delta G(PET)) in bis(anthrylmethylthio)maleonitriles and therefore the fluorescence quantum yields (Phi(f)), too. The new concept was confirmed and transferred to pyrenyl ligands, and fluorescence enhancements (FE) greater than 3.2 in the presence of PdCl2 were achieved by 7 and 8 (FE=5.4 and 5.2). Finally, for comparison, monofluorophore ligands 10-13 were synthesized.}, language = {en} } @article{SchwarzeMicklerDoscheetal.2010, author = {Schwarze, Thomas and Mickler, Wulfhard and Dosche, Carsten and Flehr, Roman and Klamroth, Tillmann and L{\"o}hmannsr{\"o}ben, Hans-Gerd and Saalfrank, Peter and Holdt, Hans-J{\"u}rgen}, title = {Systematic investigation of photoinduced electron transfer controlled by internal charge transfer and its consequences for selective PdCl2 coordination}, issn = {0947-6539}, year = {2010}, abstract = {Fluoroionophores of fluorophore-spacer-receptor format were prepared for detection of PdCl2 by fluorescence enhancement. The fluorescent probes 1-13 consist of a fluorophore group, an alkyl spacer and a dithiomaleonitrile PdCl2 receptor. First, varying the length of the alkylene spacer (compounds 1-3) revealed a dominant through-space pathway for oxidative photoinduced electron transfer (PET) in CH2-bridged dithiomaleonitrile fluoroionophores. Second, fluorescent probes 4-9 containing two anthracene or pyrene fragments connected through CH2 bridges to the dithiomaleonitrile unit were synthesized. Modulation of the oxidation potential (EOx) through electron-withdrawing or -donating groups on the anthracene moiety regulates the thermodynamic driving force for oxidative PET (GPET) in bis(anthrylmethylthio)maleonitriles and therefore the fluorescence quantum yields (f), too. The new concept was confirmed and transferred to pyrenyl ligands, and fluorescence enhancements (FE) greater than 3.2 in the presence of PdCl2 were achieved by 7 and 8 (FE=5.4 and 5.2). Finally, for comparison, monofluorophore ligands 10-13 were synthesized.}, language = {en} } @article{SchwarzeMuellerDoscheetal.2007, author = {Schwarze, Thomas and Mueller, Holger and Dosche, Carsten and Klamroth, Tillmann and Mickler, Wulfhard and Kelling, Alexandra}, title = {Luminescence detection of open-shell transition-metal ions by photoinduced electron transfer controlled by internal charge transfer of a receptor}, doi = {10.1002/anie.200603992}, year = {2007}, language = {en} } @article{BenassiBregullaFriedrichetal.1998, author = {Benassi, Rois and Bregulla, Antje and Friedrich, Alwin and Henning, Dietrich and Heydenreich, Matthias and Mickler, Wulfhard and Kleinpeter, Erich and Kempter, Gerhard and Schilde, Uwe and Taddei, F.}, title = {NMR spectroscopic and theoretical structural study of 5-exo-methylene-substituted hydantoins}, year = {1998}, language = {en} } @article{KammerStarkePietruchaetal.2012, author = {Kammer, Stefan and Starke, Ines and Pietrucha, Andreas and Kelling, Alexandra and Mickler, Wulfhard and Schilde, Uwe and Dosche, Carsten and Kleinpeter, Erich and Holdt, Hans-J{\"u}rgen}, title = {1,12-Diazaperylene and 2,11-dialkylated-1,12-diazaperylene iridium(III) complexes [Ir((CN)-N-boolean AND)(2)((NN)-N-boolean AND)]PF6: new supramolecular assemblies}, series = {Dalton transactions : a journal of inorganic chemistry, including bioinorganic, organometallic, and solid-state chemistry}, volume = {41}, journal = {Dalton transactions : a journal of inorganic chemistry, including bioinorganic, organometallic, and solid-state chemistry}, number = {34}, publisher = {Royal Society of Chemistry}, address = {Cambridge}, issn = {1477-9226}, doi = {10.1039/c2dt30412k}, pages = {10219 -- 10227}, year = {2012}, abstract = {A series of new monocationic iridium(III) complexes [Ir((CN)-N-boolean AND)(2)((NN)-N-boolean AND)]PF6 with "large-surface" alpha,alpha'-diimin ligands (NN)-N-boolean AND (dap = 1,12-diazaperylene, dmedap = 2,11-dimethyl-1,12-diazaperylene, dipdap = 2,11-diisopropyl-1,12-diazaperylene) and different cyclometalating ligands (CN)-N-boolean AND (piq = 1-phenylisoquinoline, bzq = benzo[h]quinoline, ppz = 1-phenylpyrazole, thpy = 2-(2-thienyl)pyridine, ppy = 2-phenylpyridine, meppy = 2-(4-methylphenyl)pyridine, dfppy = 2-(2,4-difluorophenyl)pyridine) were synthesized. The solid structures of the complexes [Ir(piq)(2)(dap)]PF6, [Ir(bzq)(2)(dap)]PF6, [Ir(ppy)(2)(dipdap)]PF6, [Ir(piq)(2)(dmedap)]PF6, [Ir(ppy)(2)(dap)]PF6 and [Ir(ppz)(2)(dap)]PF6 are reported. In [Ir(piq)(2)(dap)]PF6, the dap ligand and one of the piq ligands of each cationic complex are involved in pi-pi stacking interactions forming supramolecular channels running along the crystallographic c axis. In the crystalline [Ir(bzq)(2)(dap)]PF6 pi-pi stacking interactions between the metal complexes lead to the formation of a 2D layer structure. In addition, CH-pi interactions were found in all compounds, which are what stabilizes the solid structure. In particular, a significant number of them were found in [Ir(piq)(2)(dap)]PF6 and [Ir(bzq)(2)(dap)]PF6. The crystal structures of [Ir(ppy)(2)(dipdap)]PF6 and [Ir(ppy)(2)(dmedap)]PF6 are also presented, being the first examples of bis-cyclometalated iridium(III) complexes with phenanthroline-type alpha,alpha'-diimin ligands bearing bulky alkyl groups in the neighbourhood of the N-donor atoms. These ligands implicate a distorted octahedral coordination geometry that in turn destabilized the Ir-N-N boolean AND N bonds. The new iridium (III) complexes are not luminescent. All compounds show an electrochemically irreversible anodic peak between 1.15 and 1.58 V, which is influenced by the different cyclometalated ligands. All of the new complexes show two reversible successive one-electron "large-surface" ligand-centred reductions around -0.70 V and -1.30 V. Electrospray ionisation mass spectrometry (ESI-MS) and collision induced decomposition (CID) measurements were used to investigate the stability of the new complexes. Thereby, the stability agreed well with the order of the Ir-N-N boolean AND N bond lengths.}, language = {en} } @article{UhlemannBansseLudwigetal.1995, author = {Uhlemann, Erhard and Banße, Wolfgang and Ludwig, Eberhard and Mickler, Wulfhard and Hahn, Ekkehardt and L{\"u}gger, Thomas and Lehmann, Andreas}, title = {Mangan(IV)-Komplexe mit dreiz{\"a}hnigen diaciden Liganden : Kristallstruktur von Acetylacetonato- salicylaldehyd-benzoylhydrazonato(2-methanol-mangan(III)}, year = {1995}, language = {de} }