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Geometry of Zn(II) complexes with dissolved organic matter: X-ray studies at variable pH
The structure of Zn(II) complexes with dissolved organic matter (DOM) is an important consideration in developing molecular-level models of Zn(II) speciation, but recent reports favoring the tetrahedral geometry differ from earlier findings that geometry was largely octahedral. In general, the prese...
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| Published in: | Toxicological and environmental chemistry 2013, Vol.95 (1), p.38-44 |
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| cites | cdi_FETCH-LOGICAL-c349t-1665b5e8308ede49a058ad489d01ea7ab3f84988ef95218a133d10288e800dc93 |
| container_end_page | 44 |
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| container_title | Toxicological and environmental chemistry |
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| creator | Mousavi, Aliyar Marts, Amy R Tierney, David L Cabaniss, Stephen E |
| description | The structure of Zn(II) complexes with dissolved organic matter (DOM) is an important consideration in developing molecular-level models of Zn(II) speciation, but recent reports favoring the tetrahedral geometry differ from earlier findings that geometry was largely octahedral. In general, the presence of thiolate ligands favors the tetrahedral geometry, while O and N ligands favor the octahedral geometry. This work presents extended X-ray absorption fine structure (EXAFS) and X-ray absorption near-edge structure (XANES) spectroscopic results, indicating an octahedral geometry over the pH range of 5–9 for a freshwater DOM isolate. Changes in XANES derivatives as a function of pH can be explained in terms of ligand protonation and/or changing ligand groups. Tetrahedral Zn(II)–DOM geometry may be restricted to binding environments containing thiol groups. |
| doi_str_mv | 10.1080/02772248.2012.734620 |
| format | article |
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Tetrahedral Zn(II)–DOM geometry may be restricted to binding environments containing thiol groups.</description><subject>absorption</subject><subject>Binding</subject><subject>Derivatives</subject><subject>Dissolved organic matter</subject><subject>DOM</subject><subject>EXAFS</subject><subject>Fine structure</subject><subject>freshwater</subject><subject>Ligands</subject><subject>Organic chemicals</subject><subject>Speciation</subject><subject>spectroscopy</subject><subject>Spectrum analysis</subject><subject>Tetrahedra</subject><subject>thiols</subject><subject>X-radiation</subject><subject>X-rays</subject><subject>XANES</subject><subject>Zinc</subject><subject>Zn(II)</subject><issn>1029-0486</issn><issn>0277-2248</issn><issn>1029-0486</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqFkU1rFEEQhgdRMEb_gWCjl3iYtfpjdrq9iARNFgIeNBC8NLXdNUmHmem1uzdx_70dRkG8eKqieN4XiqdpXnJYcdDwDkTfC6H0SgAXq16qtYBHzREHYVpQev34r_1p8yznWwDQXa-OmqszihOVdGBxYN_nk83mLXNx2o30kzK7D-WG-ZBzHO_Is5iucQ6OTVgKpffsqk14YLnsfagwFnaHKeB2JLY7f948GXDM9OL3PG4uP3_6dnreXnw525x-vGidVKa0fL3uth1pCZo8KYPQafRKGw-csMetHLQyWtNgOsE1cil9_aUeNIB3Rh43r5femEuw2YVC7sbFeSZXLOdgNIgKnSzQLsUfe8rFTiE7GkecKe6z5VJIDcYIXdE3_6C3cZ_m-kKluJAK-h4qpRbKpZhzosHuUpgwHSwH--DE_nFiH5zYxUmNfVhiYR5imvA-ptHbgocxpiHh7EK28j8Nr5aGAaPF61QDl18roAC4lqbv5C-AUZkC</recordid><startdate>2013</startdate><enddate>2013</enddate><creator>Mousavi, Aliyar</creator><creator>Marts, Amy R</creator><creator>Tierney, David L</creator><creator>Cabaniss, Stephen E</creator><general>Taylor & Francis Group</general><general>Taylor & Francis Ltd</general><scope>FBQ</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7QO</scope><scope>7QQ</scope><scope>7SC</scope><scope>7SE</scope><scope>7SP</scope><scope>7SR</scope><scope>7ST</scope><scope>7TA</scope><scope>7TB</scope><scope>7U5</scope><scope>7U7</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>H8G</scope><scope>JG9</scope><scope>JQ2</scope><scope>KR7</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>P64</scope><scope>SOI</scope><scope>OTOTI</scope></search><sort><creationdate>2013</creationdate><title>Geometry of Zn(II) complexes with dissolved organic matter: X-ray studies at variable pH</title><author>Mousavi, Aliyar ; 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| ispartof | Toxicological and environmental chemistry, 2013, Vol.95 (1), p.38-44 |
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| language | eng |
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| subjects | absorption Binding Derivatives Dissolved organic matter DOM EXAFS Fine structure freshwater Ligands Organic chemicals Speciation spectroscopy Spectrum analysis Tetrahedra thiols X-radiation X-rays XANES Zinc Zn(II) |
| title | Geometry of Zn(II) complexes with dissolved organic matter: X-ray studies at variable pH |
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