Taking Advantage of the Coordinative Behavior of a Tridentate Schiff Base Ligand towards Pd<sup>2+</sup> and Cu<sup>2+</sup>
We have explored the suitability of an <i>O,N,N</i>−donor Schiff base (H<sub>2</sub>SB) for obtaining dinuclear complexes with heavy metal ions such as Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, and Co<sup>2+</sup...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-08-01
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| Series: | Crystals |
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| Online Access: | https://www.mdpi.com/2073-4352/9/8/407 |
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| author | Jesús Sanmartín-Matalobos Matilde Fondo Morteza Zarepour-Jevinani Ana M. García-Deibe |
| author_facet | Jesús Sanmartín-Matalobos Matilde Fondo Morteza Zarepour-Jevinani Ana M. García-Deibe |
| author_sort | Jesús Sanmartín-Matalobos |
| collection | DOAJ |
| description | We have explored the suitability of an <i>O,N,N</i>−donor Schiff base (H<sub>2</sub>SB) for obtaining dinuclear complexes with heavy metal ions such as Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, and Co<sup>2+</sup> (borderline acids) as well as Pd<sup>2+</sup> and Cd<sup>2+</sup> (soft acids). Spectroscopic studies demonstrated that the complexation of H<sub>2</sub>SB and Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Co<sup>2+</sup>, Pd<sup>2+</sup>, and Cd<sup>2+</sup> occurred at a 1:1 stoichiometry. We have found two square planar centers with Pd-N-Pd angles of 93.08(11)° and a Pd−Pd distance of 3.0102(4) Å in Pd<sub>2</sub>(SB)<sub>2</sub>·Me<sub>2</sub>CO. This Pd−Pd distance is 30% shorter than the sum of the van der Waals radii, which is in accordance with a strong palladophilic interaction. Fluorescence studies on H<sub>2</sub>SB-M<sup>2+</sup> interaction showed that H<sub>2</sub>SB can detect Cu<sup>2+</sup> ions in a sample matrix containing various metal ions (hard, soft, or borderline acids) without interference. Determination of binding constants showed that H<sub>2</sub>SB has a greater affinity for borderline acids than for soft acids. |
| first_indexed | 2024-04-11T22:20:53Z |
| format | Article |
| id | doaj.art-48fbfdf0331445afa77a50c9d5ffc410 |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-04-11T22:20:53Z |
| publishDate | 2019-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-48fbfdf0331445afa77a50c9d5ffc4102022-12-22T04:00:07ZengMDPI AGCrystals2073-43522019-08-019840710.3390/cryst9080407cryst9080407Taking Advantage of the Coordinative Behavior of a Tridentate Schiff Base Ligand towards Pd<sup>2+</sup> and Cu<sup>2+</sup>Jesús Sanmartín-Matalobos0Matilde Fondo1Morteza Zarepour-Jevinani2Ana M. García-Deibe3Departamento de Química Inorgánica, Facultad de Química, Universidad de Santiago de Compostela, Avda. de las ciencias s/n, 15782 Santiago de Compostela, SpainDepartamento de Química Inorgánica, Facultad de Química, Universidad de Santiago de Compostela, Avda. de las ciencias s/n, 15782 Santiago de Compostela, SpainDepartamento de Química Inorgánica, Facultad de Química, Universidad de Santiago de Compostela, Avda. de las ciencias s/n, 15782 Santiago de Compostela, SpainDepartamento de Química Inorgánica, Facultad de Química, Universidad de Santiago de Compostela, Avda. de las ciencias s/n, 15782 Santiago de Compostela, SpainWe have explored the suitability of an <i>O,N,N</i>−donor Schiff base (H<sub>2</sub>SB) for obtaining dinuclear complexes with heavy metal ions such as Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, and Co<sup>2+</sup> (borderline acids) as well as Pd<sup>2+</sup> and Cd<sup>2+</sup> (soft acids). Spectroscopic studies demonstrated that the complexation of H<sub>2</sub>SB and Cu<sup>2+</sup>, Zn<sup>2+</sup>, Ni<sup>2+</sup>, Co<sup>2+</sup>, Pd<sup>2+</sup>, and Cd<sup>2+</sup> occurred at a 1:1 stoichiometry. We have found two square planar centers with Pd-N-Pd angles of 93.08(11)° and a Pd−Pd distance of 3.0102(4) Å in Pd<sub>2</sub>(SB)<sub>2</sub>·Me<sub>2</sub>CO. This Pd−Pd distance is 30% shorter than the sum of the van der Waals radii, which is in accordance with a strong palladophilic interaction. Fluorescence studies on H<sub>2</sub>SB-M<sup>2+</sup> interaction showed that H<sub>2</sub>SB can detect Cu<sup>2+</sup> ions in a sample matrix containing various metal ions (hard, soft, or borderline acids) without interference. Determination of binding constants showed that H<sub>2</sub>SB has a greater affinity for borderline acids than for soft acids.https://www.mdpi.com/2073-4352/9/8/407X-rayfluorescencemetallophilic interactionpalladiumcopperSchiff base |
| spellingShingle | Jesús Sanmartín-Matalobos Matilde Fondo Morteza Zarepour-Jevinani Ana M. García-Deibe Taking Advantage of the Coordinative Behavior of a Tridentate Schiff Base Ligand towards Pd<sup>2+</sup> and Cu<sup>2+</sup> Crystals X-ray fluorescence metallophilic interaction palladium copper Schiff base |
| title | Taking Advantage of the Coordinative Behavior of a Tridentate Schiff Base Ligand towards Pd<sup>2+</sup> and Cu<sup>2+</sup> |
| title_full | Taking Advantage of the Coordinative Behavior of a Tridentate Schiff Base Ligand towards Pd<sup>2+</sup> and Cu<sup>2+</sup> |
| title_fullStr | Taking Advantage of the Coordinative Behavior of a Tridentate Schiff Base Ligand towards Pd<sup>2+</sup> and Cu<sup>2+</sup> |
| title_full_unstemmed | Taking Advantage of the Coordinative Behavior of a Tridentate Schiff Base Ligand towards Pd<sup>2+</sup> and Cu<sup>2+</sup> |
| title_short | Taking Advantage of the Coordinative Behavior of a Tridentate Schiff Base Ligand towards Pd<sup>2+</sup> and Cu<sup>2+</sup> |
| title_sort | taking advantage of the coordinative behavior of a tridentate schiff base ligand towards pd sup 2 sup and cu sup 2 sup |
| topic | X-ray fluorescence metallophilic interaction palladium copper Schiff base |
| url | https://www.mdpi.com/2073-4352/9/8/407 |
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