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Bonde NA, Petersen JB, Sørensen MA, Nielsen UG, Fåk B, Rols S, Ollivier J, Weihe H, Bendix J, Perfetti M. Importance of Axial Symmetry in Elucidating Lanthanide-Transition Metal Interactions. Inorg Chem 2020; 59:235-243. [PMID: 31825607 DOI: 10.1021/acs.inorgchem.9b02064] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In this paper, we experimentally study and model the electron donating character of an axial diamagnetic Pd2+ ion in four metalloligated lanthanide complexes of formula [PPh4][Ln{Pd(SAc)4}2] (SAc- = thioacetate, Ln = Tb, Dy, Ho, and Er). A global model encompassing inelastic neutron scattering, torque magnetometry, and dc magnetometry allows to precisely determine the energy level structure of the complexes. Solid state nuclear magnetic resonance reveals a less donating character of Pd2+ compared to the previously reported isostructural Pt2+-based complexes. Consequently, all complexes invariably show a lower crystal field strength compared to their Pt2+-analogues. The dynamic properties show an enhanced single molecule magnet behavior due to the suppression of quantum tunneling, in agreement with our model.
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Affiliation(s)
- Niels A Bonde
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 Copenhagen , Denmark.,Institut Laue-Langevin , 71 avenue des Martyrs, CS 20156 , 38042 Grenoble Cedex 9 , France
| | - Jonatan B Petersen
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 Copenhagen , Denmark
| | - Mikkel A Sørensen
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 Copenhagen , Denmark
| | - Ulla G Nielsen
- Department of Physics, Chemistry and Pharmacy , University of Southern Denmark , Campusvej 55 , 5230 Odense M , Denmark
| | - Björn Fåk
- Institut Laue-Langevin , 71 avenue des Martyrs, CS 20156 , 38042 Grenoble Cedex 9 , France
| | - Stéphane Rols
- Institut Laue-Langevin , 71 avenue des Martyrs, CS 20156 , 38042 Grenoble Cedex 9 , France
| | - Jacques Ollivier
- Institut Laue-Langevin , 71 avenue des Martyrs, CS 20156 , 38042 Grenoble Cedex 9 , France
| | - Høgni Weihe
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 Copenhagen , Denmark
| | - Jesper Bendix
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 Copenhagen , Denmark
| | - Mauro Perfetti
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , DK-2100 Copenhagen , Denmark
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Reitzel K, Bennett WW, Berger N, Brownlie WJ, Bruun S, Christensen ML, Cordell D, van Dijk K, Egemose S, Eigner H, Glud RN, Grönfors O, Hermann L, Houot S, Hupfer M, Jacobs B, Korving L, Kjærgaard C, Liimatainen H, Van Loosdrecht MCM, Macintosh KA, Magid J, Maia F, Martin-Ortega J, McGrath J, Meulepas R, Murry M, Neset TS, Neumann G, Nielsen UG, Nielsen PH, O'Flaherty V, Qu H, Santner J, Seufert V, Spears B, Stringer LC, Stutter M, Verburg PH, Wilfert P, Williams PN, Metson GS. New Training to Meet the Global Phosphorus Challenge. Environ Sci Technol 2019; 53:8479-8481. [PMID: 31283194 DOI: 10.1021/acs.est.9b03519] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Kasper Reitzel
- University of Southern Denmark , Department of Biology , Campusvej 55 , 5230 Odense M, Denmark
| | - William W Bennett
- University of Southern Denmark , Department of Biology , Campusvej 55 , 5230 Odense M, Denmark
| | - Nils Berger
- EuroChem Agro GmbH , Reichskanzler-Müller-Str. 23 , 68165 Mannheim , Germany
| | - Will J Brownlie
- Centre for Ecology & Hydrology in Edinburgh , Penicuik , Midlothian , Scotland, U.K. EH26 0QB
| | - Sander Bruun
- University of Copenhagen , Department of Plant and Environmental Sciences , Thorvaldsensvej 40 , 1871 Frederiksberg C, Denmark
| | - Morten L Christensen
- Aalborg University , Department of Chemistry and Bioscience , Frederiks Bajers Vej 7H , 9220 Aalborg , Denmark
| | - Dana Cordell
- University of Technology Sydney , Institute for Sustainable Futures , PO Box 123 Broadway New South Wales 2007 , Australia
| | - Kimo van Dijk
- European Sustainable Phosphorus Platform , 8 Avenue du Dirgeable , 1170 Bruxelles , Belgium
| | - Sara Egemose
- University of Southern Denmark , Department of Biology , Campusvej 55 , 5230 Odense M, Denmark
| | - Herbert Eigner
- AGRANA Research & Innovation Center GmbH , Josef Reitherstraße 21-23 , 3430 Tulln an der Donau , Austria
| | - Ronnie N Glud
- University of Southern Denmark , Department of Biology , Campusvej 55 , 5230 Odense M, Denmark
| | - Outi Grönfors
- Kemira Oyj , R&D and Technology EMEA, Water treatment , Luoteisrinne 2 , FI-02270 Espoo , Finland
| | - Ludwig Hermann
- Proman Management GmbH , Weingartenstrasse 92 , 2214 Auersthal , Austria
| | - Sabine Houot
- French National Institute for Agricultural Research , INRA UMR, ECOSYS, Route de la Ferme , F-78850 Thiverval-Grignon , France
| | - Michael Hupfer
- Leibniz-Institute of Freshwater Ecology and Inland Fisheries , Department of Chemical Analytics and Biogeochemistry , Müggelseedamm 301 , 12587 Berlin , Germany
| | - Brent Jacobs
- University of Technology Sydney , Institute for Sustainable Futures , PO Box 123 Broadway New South Wales 2007 , Australia
| | - Leon Korving
- Wetsus , European centre of excellence for sustainable water technology , Oostergoweg 9 , 8911 MA Leeuwarden , The Netherlands
| | - Charlotte Kjærgaard
- SEGES , Danish Agriculture & Food Council F.m.b.A. Nature and Environment , Agro Food Park 15 , 8200 Aarhus , Denmark
| | - Henrikki Liimatainen
- University of Oulu , Fiber and Particle Engineering , Erkki Koiso-Kanttilankatu , Oulu 90014 , Finland
| | - Mark C M Van Loosdrecht
- Delft University of Technology , Department of Biotechnology , Van der Maasweg 9 , 2629 HZ Delft , The Netherlands
| | - Katrina A Macintosh
- The Queen's University of Belfast , School of Biological Sciences and the Institute for Global Food Security , 19 Chlorine Gardens , Belfast , BT9 5DL , Northern Ireland
| | - Jakob Magid
- University of Copenhagen , Department of Plant and Environmental Sciences , Thorvaldsensvej 40 , 1871 Frederiksberg C, Denmark
| | - Frederico Maia
- Smallmatek, Lda , Rua dos Canhas , 3810-075 Aveiro , Portugal
| | - Julia Martin-Ortega
- Sustainability Research Institute, School of Earth and Environment , University of Leeds , LS2 9JT Leeds , UK
| | - John McGrath
- The Queen's University of Belfast , School of Biological Sciences and the Institute for Global Food Security , 19 Chlorine Gardens , Belfast , BT9 5DL , Northern Ireland
| | - Roel Meulepas
- Wetsus , European centre of excellence for sustainable water technology , Oostergoweg 9 , 8911 MA Leeuwarden , The Netherlands
| | - Michael Murry
- NVP energy ltd , Galway Technology Center , Mervue Business Park , Mervue, Galway , Irland
| | - Tina-Simone Neset
- Linköping University , Department of Thematic Studies-Environmental Change , SE-58183 Linköping , Sweden
| | - Günter Neumann
- University of Hohenheim , Institute of Crop Science (340h) , Fruwirthstr. 20 , 70593 Stuttgart Germany
| | - Ulla G Nielsen
- Department of Physics, Chemistry and Pharmacy , University of Southern Denmark , Campusvej 55 , 5230 Odense M, Denmark
| | - Per H Nielsen
- Aalborg University , Department of Chemistry and Bioscience , Frederiks Bajers Vej 7H , 9220 Aalborg , Denmark
| | - Vincent O'Flaherty
- National University of Ireland Galway , University Road , Galway , Ireland H91 TK33
| | - Haiyan Qu
- University of Southern Denmark , Department of Chemical engineering, Biotechnology- and Environmental Technology , Campusvej 55 , 5230 Odense M, Denmark
| | - Jakob Santner
- University of Natural Resources and Life Sciences, Vienna , Institute of Agronomy , Konrad-Lorenz-Straße 24 , 3430 Tulln an der Donau , Vienna , Austria
| | - Verena Seufert
- VU University Amsterdam, Institute for Environmental Studies , De Boelelaan 1087 , 1081 HV Amsterdam , The Netherlands
| | - Bryan Spears
- Centre for Ecology & Hydrology in Edinburgh , Penicuik , Midlothian , Scotland, U.K. EH26 0QB
| | - Lindsay C Stringer
- Sustainability Research Institute, School of Earth and Environment , University of Leeds , LS2 9JT Leeds , UK
| | - Marc Stutter
- The James Hutton Institute , Environmental and Biochemical Sciences Group , Aberdeen , AB15 8QH , Scotland, U.K
| | - Peter H Verburg
- VU University Amsterdam, Institute for Environmental Studies , De Boelelaan 1087 , 1081 HV Amsterdam , The Netherlands
| | - Philipp Wilfert
- IPP-Kiel , Rendsburger Landstraße 196-198 , D-24113 Kiel , Germany
| | - Paul N Williams
- The Queen's University of Belfast , School of Biological Sciences and the Institute for Global Food Security , 19 Chlorine Gardens , Belfast , BT9 5DL , Northern Ireland
| | - Geneviève S Metson
- Linköping University , Department of Physics, Chemistry and Biology , Fysikhuset, Rum 3D.306 SE-58183 Linköping , Sweden
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Lundehøj L, Jensen HC, Wybrandt L, Nielsen UG, Christensen ML, Quist-Jensen CA. Layered double hydroxides for phosphorus recovery from acidified and non-acidified dewatered sludge. Water Res 2019; 153:208-216. [PMID: 30716564 DOI: 10.1016/j.watres.2019.01.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 01/07/2019] [Accepted: 01/08/2019] [Indexed: 06/09/2023]
Abstract
Phosphate, which contains the essential element phosphorous (P), is a necessary fertilizer for agriculture, but the current phosphate deposits are running out and alternative sources are needed. Sludge obtained from wastewater treatment plants contains high concentrations of phosphorus and represents an alternative, sustainable source. In this study, sludge obtained from a wastewater treatment plant with biological and chemical phosphorus removal was acidified (pH = 3, 4, 5 and 6) to release orthophosphate followed by sequestration of the orthophosphate by a zinc aluminum layered double hydroxide (Zn2Al-LDH). Sulfuric acid (H2SO4), nitric acid (HNO3), and hydrochloric acid (HCl) was tested, which showed that only sulfate anions compete with phosphate and results in reduced phosphate recovery (25-35%). The orthophosphate concentration in the liquid phase increased from 20% (raw sludge) to 75% of the total phosphorus concentration at a pH of 3, which enhanced the phosphate uptake by the ZnAl-LDH from 1.7 ± 0.2% to 60.3 ± 0.6%. During acidification, the competing anion carbonate is degassed as CO2, which further improved the phosphate uptake. PXRD showed the intercalation of carbonate in the LDH in the raw sludge at pH = 8, whereas orthophosphate was intercalated at lower pH values. 27Al MAS NMR spectroscopy and powder X-ray diffraction (PXRD) proved preservation of the LDH at all pH values. Furthermore, about a fourth of the Al is present as an amorphous aluminum phosphate (AlPO4) upon exposure to phosphate at low pH (pH = 3 and 5) based on 27Al MAS NMR spectroscopy. At a pH of 6 about a third of the P is present as brushite (CaHPO4·2H2O).
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Affiliation(s)
- L Lundehøj
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
| | - H C Jensen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg East, Denmark
| | - L Wybrandt
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg East, Denmark
| | - U G Nielsen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
| | - M L Christensen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg East, Denmark
| | - C A Quist-Jensen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg East, Denmark.
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Nielsen UG, Jakobsen HJ, Skibsted J. Characterization of divalent metal metavanadates by 51V magic-angle spinning NMR spectroscopy of the central and satellite transitions. Inorg Chem 2000; 39:2135-45. [PMID: 12526525 DOI: 10.1021/ic991243z] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
51V quadrupole coupling and chemical shielding tensors have been determined from 51V magic-angle spinning (MAS) NMR spectra at a magnetic field of 14.1 T for nine divalent metal metavanadates: Mg(VO3)2, Ca(VO3)2, Ca(VO3)(2).4H2O, alpha-Sr(VO3)2, Zn(VO3)2, alpha- and beta-Cd(VO3)2. The manifold of spinning sidebands (ssbs) from the central and satellite transitions, observed in the 15V MAS NMR spectra, have been analyzed using least-squares fitting and numerical error analysis. This has led to a precise determination of the eight NMR parameters characterizing the magnitudes and relative orientations of the quadrupole coupling and chemical shielding tensors. The optimized data show strong similarities between the NMR parameters for the isostructural groups of divalent metal metavanadates. This demonstrates that different types of metavanadates can easily be distinguished by their anisotropic NMR parameters. The brannerite type of divalent metal metavanadates exhibits very strong 51V quadrupole couplings (i.e., CQ = 6.46-7.50 MHz), which reflect the highly distorted octahedral environments for the V5+ ion in these phases. Linear correlations between the principal tensor elements for the 51V quadrupole coupling tensors and electric field gradient tensor elements, estimated from point-monopole calculations, are reported for the divalent metal metavanadates. These correlations are used in the assignment of the NMR parameters for the different crystallographic 51V sites of Ca(VO3)(2).4H2O, Pb(VO3)2, and Ba(VO3)2. For alpha-Sr(VO3)2, with an unknown crystal structure, the 51V NMR data strongly suggest that this metavanadate is isostructural with Ba(VO3)2, for which the crystal structure has been reported. Finally, the chemical shielding parameters for orthovanadates and mono- and divalent metal metavanadates are compared.
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Affiliation(s)
- U G Nielsen
- Instrument Centre for Solid-State NMR Spectroscopy, Department of Chemistry, University of Aarhus, DK-8000 Aarhus C, Denmark
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