2020

 

            Maiwald, M. M., Trumm, M., Dardenne, K., Rothe, J., Skerencak-Frech, A., Panak, P. J., Speciation, thermodynamics and structure of Np(V) oxalate complexes in aqueous solution, Dalton Trans. 49, 13359-13371 (2020).

 

           Weßling, P., Schenk, T., Braun, F., Beele, B. B., Trumm, S., Trumm, M., Schimmelpfennig, B., Schild, D., Geist, A., Panak, P. J., Trivalent Actinide Ions Showing Tenfold Coordination in Solution, Inorg. Chem. 59, 12410-12421 (2020).

 

            Apostolidis, C., Kovacs, A., Walter, O., Colineau, E., Griveau, J.-C., Morgenstern, A., Rebizant, J., Caciuffo, R., Panak, P. J., Rabung, T., Schimmelpfennig, B., Perfetti, M., Tris-{Hydridotris(1-pyrazolyl)borato}actinide Complexes: Synthesis, Spectroscopy, Crystal structure, Bonding Properties and Magnetic Behaviour, Chem. Eur. J. 26, 11293-11306 (2020).

 

            Maiwald, M. M., Skerencak-Frech, A., Panak, P. J., Spectroscopic characterization and thermodynamics of the complexation of Np(V) with sulfate up to 200 °C, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 240, 118579-118587 (2020).

 

            Maiwald, M. M., Dardenne, K., Rothe, J., Skerencak-Frech, A., Panak, P. J., Thermodynamics and structure of Np(V) complexes with formate. A spectroscopic and theoretical study, Inorg. Chem. 59/9, 6067-6077 (2020).

 

            Weßling, P., Müllich, U., Guerinoni, E., Geist, A., Panak, P. J., Solvent extraction of An(III) and Ln(III) using TODGA in aromatic diluents to suppress third phase formation, Hydrometallurgy 192, 105248 (2020).

 

            Zaytsev, A. V., Bulmer, R., Kozhevnikov, V. N., Sims, M., Modolo, G., Wilden, A., Waddell, P. G., Geist, A., Panak, P. J., Wessling, P., Lewis, F. W., Exploring the Subtle Effect of Aliphatic Ring Size on Minor Actinide Extraction Properties and Metal Ion Speciation in Bis-1,2,4-Triazine Ligands., Chem. Eur. J. 26, 428-437 (2020).

 

 

 

2019

 

            Weßling, P., Trumm, M., Macerata, E., Ossola, A., Mossini, E., Gullo, M. C., Arduini, A., Casnati, A., Mariani, M., Adam, C., Geist, A., Panak, P. J., Activation of the aromatic core of PTD – effects on extraction performance, stability constants and basicity, Inorg. Chem. 58, 14642-14651 (2019).

 

            Klaß, L.; Wilden, A.; Sadowski, F.; Wagner, C.; Geist, A.; Panak, P. J.; Herdzik-Koniecko, I.; Narbutt, J.; Modolo, G., Evaluation of the hydrophilic complexant N,N,N’,N’-tetraethyldiglycolamide (TEDGA) and its methyl-substituted analogues in the selective Am(III) separation., Solvent Extr. Ion Exch. 37(5), 297-312 (2019).

 

           Skerencak-Frech, A., Taube, F., Zanonato, P. L., Acker, M., Panak, P. J., Di Bernardo, P., A Potentiometric and Microcalorimetric Study of the Complexation of Trivalent Europium with Lactate: The Ionic Strength Dependency of log β’n, ΔrHm,n and ΔrSm,n. Thermochimica Acta.679, 178316 (2019).

 

            Müller, K., Foerstendorf, H., Steudtner, R., Tsushima, S., Kumke, M. U., Lefevre, G., Rothe, J., Mason, H., Szabo, Z., Yang, P., Adam, C., Andre, R., Brennenstuhl, K., Chiorscu, I., Cho, H. M., Creff, G., Coppin, F., Dardenne, K., Den Auwer, C., Drobot, B., Eidner, S., Hess, N. J., Kaden, P., Kremleva, A., Kretzschmar, J., Krüger, S., Platts, J. A., Panak, P. J., Polly, R., Powell, B. A., Rabung, T., Redon, R., Reiller, P. E., Rösch, N., Rossberg, A., Scheinost, A. C., Schimmelpfennig, B., Schreckenbach, G., Skerencak-Frech, A., Sladkov, V. Solari, P. L., Wang, Z. M., Washton, N. M., Zhang, X. B., Interdisciplinary Round-Robin Test on Molecular Spectroscopy of the U(VI) Acetate System, ACS Omega 4, 8167-8177 (2019).

 

            Fröhlich, D., Panak, P. J., The complexation of Eu(III) and Cm(III) with polyacrylate as a model compound for complex polycarboxylates studied by laser fluorescence spectroscopy, J. Lumin. 212, 166-170 (2019).

 

            Herdzik-Koniecko, I., Wagner, C., Trumm, M., Müllich, U., Schimmelpfennig, B., Narbutt, J., Geist, A., Panak, P. J., Do An(III) and Ln(III) ion form heteroleptic complexes with diglycolamide and hydrophilic BT(B)P ligands in solvent extraction systems? A spectroscopic and DFT study, New J. Chem. 43, 6314-6322 (2019).

 

            Maiwald, M. M., Fellhauer, D., Skerencak-Frech, A., Panak, P. J., The complexation of neptunium(V) with fluoride at elevated temperatures: Speciation and thermodynamics, Appl. Geochem. 104, 10-18 (2019).

 

            Adam, N., Adam, C., Keskitalo, M., Pfeuffer-Rooschüz, J., Panak, P. J., Interaction of Cm(III) with human serum albumin studied by time-resolved laser fluorescence spectroscopy and NMR, J. Inorg. Biochem. 192, 45-51 (2019).

 

            Koke, C., Skerencak-Frech, A., Panak, P. J., Thermodynamics of the Complexation of Curium(III) with Chloride in Alkali and Alkali Earth Metal Solutions at Elevated Temperatures, J. Chem. Thermodynamics 131, 219-224 (2019).

 

            Fröhlich, D. R., Koke, C., Maiwald, M. M., Chomyn, C., Plank, J., Panak, P. J., A spectroscopic study of the complexation reaction of trivalent lanthanides with a synthetic acrylate based PCE-superplasticizer, Spectrochim. Acta A, Molecular and Biomolecular Spectroscopy 207, 270-275 (2019).

 

 

 

2018

 

            Adam, N., Trumm, M., Smith, V. C., MacGillivray, R. T. A., Panak, P. J., Incorporation of transuranium elements: Coordination of Cm(III) to human serum transferrin, Dalton Trans. 47, 14612 – 14620 (2018).

 

            Halleröd, J., Ekberg, C., Authen, T., Bertolo, L., Lin, M., Grüner, B., Svehla, J., Wagner, C., Geist, A., Panak, P., Aneheim, E., On the Basic Extraction Properties of a Phenyl Trifluoromethyl Sulfon-Based GANEX System Containing CyMe4-BTBP and TBP, Solvent Extr. Ion Exch, 36, 360-372 (2018).

 

            Weßling, P., Trumm, M., Geist, A., Panak, P. J., Stoichiometry of An(III)-DMDOHEMA complexes formed during solvent extraction, Dalton Trans. 47, 10906-10914 (2018).

 

            Maiwald, M. M., Skerencak-Frech, A., Panak, P. J., The complexation and thermodynamics of Np(V) with acetate in aqueous solution, New J. Chem. 42, 7796-7802 (2018).

 

            Fröhlich, D. R., Panak, P. J., A thermodynamical study on the complex formation of Cm(III) with methacrylate, Applied Geochemistry 92, 104-109 (2018).

 

           Trumm, M., Adam, C., Koke, C., Maiwald, M., Höfener, S., Skerencak-Frech, A., Panak, P. J., Schimmelpfennig, B., The influence of polarity in binary solvent mixtures on the conformation of bis-triazinyl-pyridine in solution, Mol. Phys.116, 507-514 (2018).

 

            Maiwald, M. M., Sittel, T., Fellhauer, D., Skerencak-Frech, A., Panak, P. J., Thermodynamics of neptunium(V) complexation with sulfate in aqueous solution, J. Chem. Thermodynamics 116, 309-315 (2018).

 

 

 

2017

 

            Skerencak-Frech, A., Trumm, M., Fröhlich, D., Panak, P. J., Coordination and Thermodynamics of Trivalent Curium with Malonate at Increased Temperatures: A Spectroscopic and Quantum Chemical Study, Inorg. Chem. 56,10172-10180 (2017).

 

            Boubals, N., Wagner, C., Dumas, T., Chaneac, L., Manie, G., Kaufholz, P., Marie C., Panak, P. J., Modolo, G., Geist, A., Guilbaud, P., Complexation of Actinide(III) and Lanthanide(III) with H4TPAEN for a Separation of Americium from Curium and Lanthanides, Inorg. Chem.56, 7861-7869 (2017).

 

           Maiwald, M. M., Wagner, A. T., Skerencak-Frech, A., Trumm, M., Geist, A., Roesky, P. W., Panak, P. J., 4,4´-Di-tert-butyl-6-(1H-tetrazol-5-yl)-2,2´-bipyridine: modification of a highly selective N-donor ligand for the separation of trivalent actinides from lanthanides, Dalton Trans.46, 9981-9994 (2017).

 

            Fröhlich, D. R., Kremleva, A., Rossberg, A., Skerencak-Frech, A., Koke, C., Krüger, S., Panak, P. J., A combined EXAFS spectroscopic and quantum chemical study on the complex formation of Am(III) with formate, Inorg. Chem. 56, 6820-6829 (2017).

 

            Fröhlich, D. R., Maiwald, M. M., Taube F., Plank, J., Panak, P. J., A thermodynamical and structural study on the complexation of trivalent lanthanides with a polycarboxylate based concrete superplasticizer, Dalton Trans. 46, 4093-4100 (2017).

 

            Wagner, C., Mossini, E., Macerata, E., Mariani, M., Arduini, A., Casnati, A., Geist, A., Panak, P. J., Time-resolved laser fluorescence spectroscopy study of the coordination chemistry of a hydrophilic CHON [1,2,3-triazol-4-yl]pyridine ligand with Cm(III) and Eu (III), Inorg. Chem. 56, 2135-2144 (2017).

 

 

 

2016

 

            Adam, C., Rohde, V., Müllich, U., Kaden, P., Geist, A., Panak, P. J., Geckeis, H., Comparative NMR study of nPrBTP and iPrBTP, Proc. Chem. 21, 38-45 (2016).

 

            Beele, B. B., Skerencak-Frech, A., Stein, A., Trumm, M., Wilden, A., Lange, S., Modolo, G., Müllich, U., Schimmelpfennig, B., Geist, A., Panak, P. J., 2,6-bis(5,6-diisopropyl-1,2,4-triazin-3-yl)pyridine: A highly selective N-donor ligand studied by TRLFS, liquid-liquid extraction and molecular dynamics, New J. Chem. 40, 10389-10397 (2016).

 

            Edwards, A. C., Geist A., Harwood L. M., Panak, P. J., Pritchard, R. G., Sharrad, C. A., Wagner, C.,  Whitehead, R. C., Exploring electronic effects on the partitioning of actinides(III) from lanthanides(III) using functionalised bis-triazinyl phenanthroline ligands, Dalton Trans. 45, 18102-18112 (2016). 

 

            Wagner, C., Ruff, C., Müllich, U., Geist, A., Panak, P. J., The nephelauxetic effect of Eu(III)-N-donor compounds probed by fluorescence spectroscopy-further evidence for covalence?, New J. Chem.40, 9232-9237 (2016).

 

           Trumm, M., Wagner, C., Schimmelpfennig, B., Geist, A., Panak, P. J., A closer look on the coordination of soft nitrogen-donor ligands to Cm(III):SO3-Ph-BTBP, Dalton. Trans. 45 (31), 12308-12311 (2016).

 

            Fröhlich, D. R., Trumm, M., Skerencak-Frech, A., Panak, P. J., The complexation of Cm(III) with succinate studied by time-resolved laser fluorescence spectroscopy and quantum chemical calculations, Inorg. Chem. 55, 4504-4511 (2016).

 

            Höfener, S., Trumm, M., Koke, C., Heuser, J., Ekström, U., Skerencak-Frech, A., Schimmelpfennig, B., Panak, P. J., Computing UV/vis spectra using a combined molecular dynamics and quantum chemistry approach: bis-triazin-pyridine (BTP) ligands studied in solution, Phys. Chem. Chem. Phys. 18, 7728-7736 (2016).

 

            Wagner, C., Müllich, U., Geist, A., Panak, P. J., Selective Extraction of Am(III) from PUREX raffinate: The AmSel System, Solvent Extr. Ion Exch. 34/2, 103-113 (2016).

 

            Kaufholz, P.; Modolo, G.; Wilden, A.; Sadowski, F.; Bosbach, D.; Wagner, C.; Geist, A.; Panak, P. J.; Lewis, F. W., Harwood, L. M.; Solvent extraction and fluorescence spectroscopic investigation of the selective Am(III) complexation with TS-BTPhen, Solvent Extr. Ion Exch. 34/2, 126-140 (2016).

 

 

 

2015

 

           Fröhlich, D. R., Skerencak-Frech, A., Kaplan, U., Koke, C., Rossberg A., Panak, P. J., An EXAFS spectroscopic study of Am(III) complexation with lactate, J. Synchrotron Rad, 22, 1469-1474 (2015).

 

           Wagner, C., Müllich, U., Geist, A., Panak, P. J., TRLFS study on the complexation of Cm(III) and Eu(III) with SO3-Ph-BTBP, Dalton Trans.44, 17143-17151 (2015).

 

           Kiefer, C., Wagner, A. T., Beele, B. B., Geist, A., Panak, P. J., Roesky P. W., A complexation study of 2,6-bis(1-(p-tolyl)-1H-1,2,3-triazol-4-yl)pyridine using single crystal X-ray diffraction and TRLFS, Inorg. Chem. 54, 7301-7308 (2015).

 

           Fröhlich, D. R., Skerencak-Frech, A., Panak, P. J., Complex formation of Cm(III) with formate studied by time-resolved laser fluorescence spectroscopy, Appl. Geochem. 61, 312-317 (2015).

 

            Skerencak-Frech, A., Maiwald, M., Trumm, M., Fröhlich, D. R., Panak, P. J., The complexation of Cm(III) with oxalate in aqueous solution at T = 20-90 °C: A combined TRLFS and quantum chemical study, Inorganic Chemistry 54, 1860-1868 (2015).

 

            Bauer, N., Smith, V. C., MacGillivray, Panak, P. J., Complexation of Cm(III) with the recombinant N-lobe of human serum transferrin studied by time-resolved laser fluorescence spectroscopy (TRLFS), Dalton Trans 44, 1850-1857 (2015).

 

           Bremer, A., Müllich, U., Geist, A., Panak, P. J., Influence of the solvent on the complexation of Cm(III) and Eu(III) with n-Pr-BTP studied by time-resolved laser fluorescence spectroscopy, New J. Chem. 39, 1330-1338 (2015).

 

           Bauer, N., Panak, P. J., Influence of carbonate on the complexation of Cm(III) with human serum transferrin studied by time-resolved laser fluorescence spectroscopy (TRLFS), New J. Chem. 39, 1375-1381 (2015).

 

            Adam, C., Beele, B. B., Geist, A., Müllich, U., Kaden, P., Panak, P. J., NMR and TRLFS Studies of Ln(III) and Am(III) C5-BPP Complexes, Chem. Sci. 6, 1548-1559 (2015).

 

            Fröhlich, D. R., Skerencak-Frech, D., Bauer, N., Rossberg, A., Panak, P. J., The pH dependence of Am(III) complexation with acetate – An EXAFS study, J. Synchrotron Rad. 22, 99-104 (2015).

 

 

 

2014

 

           Kratsch, J., Beele, B. B., Koke, C., Fuhr, O., Denecke, M. A., Geist, A., Panak, P. J., Roesky, P. W., 6-(Tetrazol-5-yl)-2,2’-bipyridine: A Highly Selective Ligand for the Separation of Lanthanides(III) and Actinides(III), Inorg. Chem. 53(17), 8949-8958 (2014).

 

           Fröhlich, D. R., Skerencak-Frech, Gast, M., Panak, P. J., Fulvic acid complexation of Eu(III) and Cm(III) at elevated temperatures studied by time-resolved laser fluorescence spectroscopy, Dalton trans. 43(41), 15593-15601 (2014).

 

            Bauer, N., Fröhlich, D. R., Panak, P. J., Interaction of Cm(III) and Am(III) with human serum transferrin studied by time-resolved laser fluorescence and EXAFS spectroscopy, Dalton trans. 43(18), 6689-6700 (2014).

 

           Bremer, A., Whittaker, D. M., Sharrad, C. A., Geist, A., Panak, P. J., Complexation of Cm(III) and Eu(III) with CyMe4-BTPhen and CyMe4-BTBP studied by Time Resolved Laser Fluorescence Spectroscopy, Dalton trans. 43(6), 2684-2694 (2014).

 

            Fröhlich, D. R., Skerencak-Frech, A., Panak, P. J., A Spectroscopic Study on the Formation of Cm(III) Acetate Complexes at Elevated Temperatures, Dalton Trans., 43(10), 3958 – 3965 (2014).

 

            Wilden, A., Modolo, G., Lange, S., Sadowski, F., Beele, B. B., Skerencak, A., Panak, P. J., Iqbal, M., Verboom, W., Geist, A., Evaluation of Modified Diglycolamides for the mutual separation of An(III) and Ln(III) by Solvent Extraction and Time-Resolved Laser Fluorescence Spectroscopy, Solvent Extr. Ion Exch. 32/2, 119-137 (2014).

 

            Skerencak-Frech, A., Fröhlich, D., Rothe, J., Dardenne, K., Panak, P. J., A combined TRLFS and EXAFS study on the complexation of trivalent actinides with chloride at T = 25 - 200°C, Inorg. Chem. 53(2), 1062-1069, (2014).

 

 

 

2013

 

            Andreas Wilden, A., Modolo, G., Lange, S., Sadowski, F., Beele, B. B., Skerencak-Frech, A., Panak, P. J., Iqbal, M., Verboom, W., Geist, A., Bosbach: D, Modified diglycolamides for actinide separation: Solvent extraction and time-resolved laser fluorescence spectroscopy complexation studies, Proceedings Global 2013, Salt Lake City, Utah, September 29-October 3, 2013, 907-911.

 

           Beele, B. B., Rüdiger, E.,Schwörer, F., Müllich, U., Geist, A., Panak, P. J., TRLFS study on the complexation of novel BTP type ligands with Cm(III). Dalton Trans.42, 12139-12147 (2013).

 

           Adam, C., Kaden, P., Beele, B. B., Müllich, U., Trumm, S., Geist, A., Panak, P. J.,  Denecke, M. A., Evidence for covalence in a N-donor complex of americium(III), Dalton Trans 42, 14068-14074 (2013).

 

           Fröhlich, D. R., Skerencak, A., Morkos, M., Panak, P.J., A spectroscopic study of Cm(III) complexation with propionate in saline solutions at variable temperatures, New J. Chem. 37, 1520-1528 (2013).

 

           Panak, P. J., Geist, A., Complexation and extraction of trivalent actinides and lanthanides by triazinylpyridine N-donor ligands, Chem. Rev.113, 1199-1236 (2013).

 

            Banik, N. L., Denecke, M. A., Geist, A., Modolo, G., Panak, P. J., Rothe, J., 2,6-Bis(5,6-dipropyl-1,2,4-triazin-3-yl)-pyridine: structures of An(III) and Ln(III) 1:3 complexes and selectivity, Inorg. Chem. Commun. 29 , 172-174 (2013). 

 

            Bremer, A., Geist, A., Panak, P. J., Complexation of Cm(III) with 2,6-bis(5-(2,2-dimethylpropyl)-1H-pyrazol-3-yl)pyridine and 2-bromohexanoic acid studied by Time-Resolved Laser Fluorescence Spectroscopy, Radiochim. Acta. 101, 285-291 (2013).

 

            Skerencak, A., Höhne, S., Hofmann, S., Marquardt, Ch., Panak, P.J., Spectroscopic studies on the thermodynamics of the complexation of trivalent curium with propionate in the temperature range from 20 to 90°C, J. Sol. Chem. 42, 1-17 (2013).

 

           Skerencak, A., Panak, P. J., Fanghänel, Th., Complexation and thermodynamics of Cm(III) at high temperatures: The formation of [Cm(SO4)n]3-2n (n = 1, 2, 3) complexes at T = 25 to 200°C. Dalton Trans. 42 (2), 542 – 549 (2013).

 

 

 

2012

 

           Ruff, C. M., Müllich, U., Geist, A., Panak, P. J., Complexation of Cm(III) and Eu(III) with a hydrophilic 2,6-bis(1,2,4-triazin-3-yl)-pyridine studied by time-resolved laser fluorescence spectroscopy, Dalton Trans. 41, 14594-14602 (2012).

 

           Beele, B. B., Müllich, U., Schwörer, F., Geist, A., Panak, P. J., Systematic Modifications of BTP-type Ligands and Effects on the Separation of Trivalent Lanthanides and Actinides, Proc. Chem. 7, 146 – 151 (2012).

 

            Bremer, A., Geist, A., Panak, P. J., Complexation of Cm(III) with 6-(5,6-Dipentyl-1,2,4-triazin-3-yl)-2,2‘-bipyridine studied by time resolved laser fluorescence spectroscopy, Dalton Trans. 41, 7582-7589 (2012).

 

           Bremer, A., Ruff, C. M., Girnt, D., Müllich, U., Rothe, J., Roesky, P. W., Panak, P. J., Karpov, A., Müller, T. J. J., Denecke, M. A., Geist, A., 2,6-Bis-(5-(2,2-dimethylpropyl)-1H-pyrazol-3-yl)-pyridine as Ligand for the Efficient Actinide(III)/Lanthanide(III) Separation, Inorg. Chem. 51(9), 5199-5207 (2012).

 

           Ruff, C. M., Müllich, U., Geist, A., Panak, P. J., Neue Strategien in der Actinidenabtrennung – wasserlösliche Komplexbildner für den innovativen SANEX-Prozess, Energiewirtschaftliche Tagesfragen 62/3, 86-88 (2012) (invited).

 

           Steppert, M., Cisarova, I., Fanghänel, T., Geist, A., Lindqvist-Reis, P.,  Panak, P., Stepnicka, P., Trumm, S., Walther, C., Complexation of Europium(III) by Bis(dialkyltriazinyl)bipyridines in 1-Octanol. Inorg. Chem. 51, 591-600 (2012).

 

2011

 

           Ruff, C. M., Müllich, U., Geist, A., Panak, P. J., A novel path in partitioning: Water-soluble BTP ligands for the innovative SANEX process., ATW - International Journal for Nuclear Power 56, 489-491 (2011) (invited).

 

           Trumm, S., Geist, A., Panak, P. J., Fanghänel, T., An Improved Hydrolytically -Stable Bis-Triazinyl-Pyridine (BTP) for Selective Actinide Extraction, Solvent Extr. Ion Exch. 29:2, 213-229 (2011).

 

           Trumm, S., Wipff, A., Geist, A., Panak, P. J., Fanghänel, T., Optimising BTP ligands by tuning their basicity, Radiochim. Acta 99, 13-16 (2011).

 

           Trumm, S., Lieser, G., Panak, P. J., Luminescence study on the solvation of Cm(III) in binary aqueous solvent mixtures, Radiochim. Acta 99, 783-790 (2011).

 

 

 

2010

 

           Girnt, D., Roesky, P. W., Geist, A., Ruff, C., Panak, P. J., Denecke, M., 6-(3,5-Dimethyl-1H-pyrazol-1-yl)-2,2´-bipyridine as Ligand for Actinide(III) / Lanthanide(III) Separation, Inorg. Chem. 49, 9627-9635 (2010). 

 

           Trumm, S., Panak, P. J., Geist, A., Fanghänel, Th., A TRLFS Study on the Complexation of Cm(III) and Eu(III) with 2,6-Bis(5,6-dipropyl-1,2,4-triazin-3-yl) pyridine in Water/Methanol Mixture, Eur. J. Inorg. Chem., 3022-3028 (2010).

 

           Skerencak, A., Panak, P. J., Neck, V., Trumm, M., Schimmelpfennig, B., Lindqvist-Reis, P., Klenze, R., Fanghänel, Th., Complexation of Cm(III) with Fluoride in Aqueous Solution in the Temperature Range from 20 to 90 °C. A joint TRLFS and Quantum Chemical Study, J. Physical Chemistry B 114, 15626-15634 (2010).

 

           Trumm, S., Lieser, G., Foreman, M. R. S. J., Panak, P. J., Geist, A., Fanghänel, Th., A TRLFS study on the complexation of Cm(III) and Eu(III) with 4-t-butyl-6,6`-bis-(5,6-diethyl-1,2,4-triazin-3-yl)-2.2´-bipyridine in a water/2-propanol mixture, Dalton Trans. 39, 923-929 (2010).