1
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Gys N, Pawlak B, Lufungula LL, Marcoen K, Wyns K, Baert K, Atia TA, Spooren J, Adriaensens P, Blockhuys F, Hauffman T, Meynen V, Mullens S, Michielsen B. Selective Pd recovery from acidic leachates by 3-mercaptopropylphosphonic acid grafted TiO 2: does surface coverage correlate to performance? RSC Adv 2022; 12:36046-36062. [PMID: 36545072 PMCID: PMC9756939 DOI: 10.1039/d2ra07214a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Modification of metal oxides with organophosphonic acids (PAs) provides the ability to control and tailor the surface properties. The metal oxide phosphonic acid bond (M-O-P) is known to be stable under harsh conditions, making PAs a promising candidate for the recovery of metals from complex acidic leachates. The thiol functional group is an excellent regenerable scavenging group for these applications. However, the research on organophosphonic acid grafting with thiol groups is very limited. In this study, four different metal sorbent materials were designed with different thiol surface coverages. An aqueous-based grafting of 3-mercaptopropylphosphonic acid (3MPPA) on mesoporous TiO2 was employed. Surface grafted thiol groups could be obtained in the range from 0.9 to 1.9 groups per nm2. The different obtained surface properties were studied and correlated to the Pd adsorption performance. High Pd/S adsorption efficiencies were achieved, indicating the presence of readily available sorption sites. A large difference in their selectivity towards Pd removal from a spend automotive catalyst leachate was observed due to the co-adsorption of Fe on the titania support. The highest surface coverage showed the highest selectivity (K d: 530 mL g-1) and adsorption capacity (Q max: 0.32 mmol g-1) towards Pd, while strongly reducing the co-adsorption of Fe on remaining TiO2 sites.
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Affiliation(s)
- Nick Gys
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium,Laboratory of Adsorption and Catalysis (LADCA), Department of Chemistry, University of Antwerp, Universiteitsplein 1Wilrijk 2610Belgium
| | - Bram Pawlak
- Analytical and Circular Chemistry (ACC), Institute for Materials Research (IMO), Hasselt UniversityAgoralaan 1Diepenbeek 3590Belgium
| | - Léon Luntadila Lufungula
- Structural Chemistry Group, Department of Chemistry, University of AntwerpGroenenborgerlaan 171Antwerp 2020Belgium
| | - Kristof Marcoen
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit BrusselPleinlaan 2Brussels 1050Belgium
| | - Kenny Wyns
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium
| | - Kitty Baert
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit BrusselPleinlaan 2Brussels 1050Belgium
| | - Thomas Abo Atia
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium,Department of Chemistry, KU LeuvenCelestijnenlaan 200FLeuven 3000Belgium
| | - Jeroen Spooren
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium
| | - Peter Adriaensens
- Analytical and Circular Chemistry (ACC), Institute for Materials Research (IMO), Hasselt UniversityAgoralaan 1Diepenbeek 3590Belgium
| | - Frank Blockhuys
- Structural Chemistry Group, Department of Chemistry, University of AntwerpGroenenborgerlaan 171Antwerp 2020Belgium
| | - Tom Hauffman
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit BrusselPleinlaan 2Brussels 1050Belgium
| | - Vera Meynen
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium,Laboratory of Adsorption and Catalysis (LADCA), Department of Chemistry, University of Antwerp, Universiteitsplein 1Wilrijk 2610Belgium
| | - Steven Mullens
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium
| | - Bart Michielsen
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium
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2
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Petrov AI. Quantum chemical modeling of the thermodynamics of the formation of Au(III), Pd(II), and Pt(II) chloride complexes. J Mol Model 2022; 28:391. [DOI: 10.1007/s00894-022-05381-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 11/08/2022] [Indexed: 11/18/2022]
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3
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Mironenko RM, Likholobov VA, Belskaya OB. Nanoglobular carbon and palladium - carbon catalysts for liquid-phase hydrogenation of organic compounds. RUSSIAN CHEMICAL REVIEWS 2022. [DOI: 10.1070/rcr5017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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4
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Effective extraction of Pt(IV) as [PtCl6]2− from hydrochloric acid using a simple urea extractant. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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5
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Nayak S, Kumal RR, Liu Z, Qiao B, Clark AE, Uysal A. Origins of Clustering of Metalate-Extractant Complexes in Liquid-Liquid Extraction. ACS APPLIED MATERIALS & INTERFACES 2021; 13:24194-24206. [PMID: 33849269 DOI: 10.1021/acsami.0c23158] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Effective and energy-efficient separation of precious and rare metals is very important for a variety of advanced technologies. Liquid-liquid extraction (LLE) is a relatively less energy intensive separation technique, widely used in separation of lanthanides, actinides, and platinum group metals (PGMs). In LLE, the distribution of an ion between an aqueous phase and an organic phase is determined by enthalpic (coordination interactions) and entropic (fluid reorganization) contributions. The molecular scale details of these contributions are not well understood. Preferential extraction of an ion from the aqueous phase is usually correlated with the resulting fluid organization in the organic phase, as the longer-range organization increases with metal loading. However, it is difficult to determine the extent to which organic phase fluid organization causes, or is caused by, metal loading. In this study, we demonstrate that two systems with the same metal loading may impart very different organic phase organizations and investigate the underlying molecular scale mechanism. Small-angle X-ray scattering shows that the structure of a quaternary ammonium extractant solution in toluene is affected differently by the extraction of two metalates (octahedral PtCl62- and square-planar PdCl42-), although both are completely transferred into the organic phase. The aggregates formed by the metalate-extractant complexes (approximated as reverse micelles) exhibit a more long-range order (clustering) with PtCl62- compared to that with PdCl42-. Vibrational sum frequency generation spectroscopy and complementary atomistic molecular dynamics simulations on model Langmuir monolayers indicate that the two metalates affect the interfacial hydration structures differently. Furthermore, the interfacial hydration is correlated with water extraction into the organic phase. These results support a strong relationship between the organic phase organizational structure and the different local hydration present within the aggregates of metalate-extractant complexes, which is independent of metalate concentration.
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Affiliation(s)
- Srikanth Nayak
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Raju R Kumal
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Zhu Liu
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Baofu Qiao
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Aurora E Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Ahmet Uysal
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
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6
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Selective and Preferential Separation of Rhodium (III) from Palladium (II) and Platinum (IV) Using a m-Phenylene Diamine-Containing Precipitant. Sci Rep 2019; 9:12414. [PMID: 31455849 PMCID: PMC6712025 DOI: 10.1038/s41598-019-48920-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Accepted: 08/15/2019] [Indexed: 11/22/2022] Open
Abstract
Although Rh is an industrially important and the most expensive platinum group metal (PGM), the selective and preferential separation of Rh from PGM mixtures still remains as a big challenge. In this work, the separation of Rh (III) from Pd (II) and Pt (IV) in a hydrochloric acid (HCl) solution was studied using a m-phenylene diamine-containing precipitant (m-PDA). At high HCl concentrations (6.0–8.0 M), most of the Rh (III) (>90%) was precipitated, and Pd (II) and Pt (IV) were hardly precipitated (<5%). On the other hand, over 85% of Pd (II) and Pt (IV) precipitated along with small amount of Rh (III) (<25%) at low HCl concentrations (1.0–2.0 M). As a consequence, m-PDA enabled selective and preferential precipitation of Rh (III) at high HCl concentrations. XPS and TG analyses revealed that the Rh-containing precipitate is an ion-pair complex composed of one [RhCl6]3− anion and three m-PDA cations. The Rh desorption from the precipitate as well as the recovery of m-PDA was successfully achieved using an NH4OH solution. This method is a promising practical approach to Rh recovery.
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7
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Matsumoto K, Yamakawa S, Sezaki Y, Katagiri H, Jikei M. Preferential Precipitation and Selective Separation of Rh(III) from Pd(II) and Pt(IV) Using 4-Alkylanilines as Precipitants. ACS OMEGA 2019; 4:1868-1873. [PMID: 31459442 PMCID: PMC6648802 DOI: 10.1021/acsomega.8b03435] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 01/15/2019] [Indexed: 06/10/2023]
Abstract
Rhodium (Rh) is the most expensive platinum group metal (PGM) and is of great industrial importance. Although the recycling of PGMs from secondary sources is in high demand, the preferential and selective separation of Rh from PGM mixtures remains a great challenge. Here, a selective Rh separation method involving the precipitation of Rh from an HCl solution containing palladium (Pd), platinum (Pt), and Rh is reported. 4-Butylaniline and 4-hexylaniline were used as precipitants for Rh, and selective Rh precipitation was achieved at high HCl concentrations. We revealed that Rh in HCl selectively forms a unique and highly stable ion-pair complex comprising [RhCl6]3-/anilinium/chloride ions in a 1:6:3 ratio. The formation and high stability of the Rh complex were found to play important roles in the selective recovery of Rh from PGM mixtures.
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Affiliation(s)
- Kazuya Matsumoto
- Department
of Materials Science, Graduate School of Engineering Science, Akita University, 1-1 Tegatagakuen-machi, Akita-shi, Akita 010-8502, Japan
| | - Sumito Yamakawa
- Department
of Materials Science, Graduate School of Engineering Science, Akita University, 1-1 Tegatagakuen-machi, Akita-shi, Akita 010-8502, Japan
| | - Yuto Sezaki
- Department
of Materials Science, Graduate School of Engineering Science, Akita University, 1-1 Tegatagakuen-machi, Akita-shi, Akita 010-8502, Japan
| | - Hiroshi Katagiri
- Department
of Chemistry and Chemical Engineering, Graduate School of Science
and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Mitsutoshi Jikei
- Department
of Materials Science, Graduate School of Engineering Science, Akita University, 1-1 Tegatagakuen-machi, Akita-shi, Akita 010-8502, Japan
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8
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Engelbrecht L, Mocci F, Laaksonen A, Koch KR. 195Pt NMR and Molecular Dynamics Simulation Study of the Solvation of [PtCl 6] 2- in Water-Methanol and Water-Dimethoxyethane Binary Mixtures. Inorg Chem 2018; 57:12025-12037. [PMID: 30215514 DOI: 10.1021/acs.inorgchem.8b01554] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The experimental 195Pt NMR chemical shift, δ(195Pt), of the [PtCl6]2- anion dissolved in binary mixtures of water and a fully miscible organic solvent is extremely sensitive to the composition of the mixture at room temperature. Significantly nonlinear δ(195Pt) trends as a function of solvent composition are observed in mixtures of water-methanol, or ethylene glycol, 2-methoxyethanol, and 1,2-dimethoxyethane (DME). The extent of the deviation from linearity of the δ(195Pt) trend depends strongly on the nature of the organic component in these solutions, which broadly suggests preferential solvation of the [PtCl6]2- anion by the organic molecule. This simplistic interpretation is based on an accepted view pertaining to monovalent cations in similar binary solvent mixtures. To elucidate these phenomena in detail, classical molecular dynamics computer simulations were performed for [PtCl6]2- in water-methanol and water-DME mixtures using the anionic charge scaling approach to account for the effect of electronic dielectric screening. Our simulations suggest that the simplistic model of preferential solvation of [PtCl6]2- by the organic component as inferred from nonlinear δ(195Pt) trends is not entirely accurate, particularly for water-DME mixtures. The δ(195Pt) trend in these mixtures levels off for high DME mole fractions, which results from apparent preferential location of [PtCl6]2- anions at the borders of water-rich regions or clusters within these inherently micro-heterogeneous mixtures. By contrast in water-methanol mixtures, apparently less pronounced mixed solvent micro-heterogeneity is found, suggesting the experimental δ(195Pt) trend is consistent with a more moderate preferential solvation of [PtCl6]2- anions. This finding underlines the important role of solvent-solvent interactions and micro-heterogeneity in determining the solvation environment of [PtCl6]2- anions in binary solvent mixtures, probed by highly sensitive 195Pt NMR. The notion that preferential solvation of [PtCl6]2- results primarily from competing ion-solvent interactions as generally assumed for monatomic ions, may not be appropriate in general.
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Affiliation(s)
- Leon Engelbrecht
- Department of Chemistry and Polymer Science , Stellenbosch University , Private Bag X1 , Matieland 7602 , South Africa.,Department of Chemical and Geological Sciences , University of Cagliari , I-09042 Monserrato , Italy.,Division of Physical Chemistry, Department of Materials and Environmental Chemistry, Arrhenius Laboratory , Stockholm University , 10691 Stockholm , Sweden
| | - Francesca Mocci
- Department of Chemical and Geological Sciences , University of Cagliari , I-09042 Monserrato , Italy
| | - Aatto Laaksonen
- Division of Physical Chemistry, Department of Materials and Environmental Chemistry, Arrhenius Laboratory , Stockholm University , 10691 Stockholm , Sweden.,Department of Chemistry-Ångström Laboratory , Uppsala University , Box 538, SE-75121 Uppsala , Sweden
| | - Klaus R Koch
- Department of Chemistry and Polymer Science , Stellenbosch University , Private Bag X1 , Matieland 7602 , South Africa
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9
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Koch KR, Engelbrecht L. Intrinsic 37/35Cl and 18/16O isotope shifts in 195Pt and 103Rh NMR of purely inorganic Pt and Rh complexes as unique spectroscopic fingerprints for unambiguous assignment of structure. Dalton Trans 2017. [PMID: 28640290 DOI: 10.1039/c7dt01722g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Well-resolved intrinsic 1ΔM(37/35Cl) and 1ΔM(18/16O) isotope shifts (where M = 195Pt or 103Rh) are visible in the 195Pt NMR peak profiles of relatively kinetically inert [PtCln(H2O)6-n]4-n (n = 1-6) complexes, their corresponding hydroxido [PtCl6-n(OH)n]2- (n = 1-5/6) anions, and [RhCln(H2O)6-n]3-n (n = 3-6) complexes in aqueous solutions at ca. 293 K. Although some such isotope effects have been previously reported, there are very limited published data in the open literature, and the first systematic studies of such intrinsic 1ΔM(37/35Cl) and 1ΔM(18/16O) isotope effects are reviewed in this perspective. In high magnetic-field NMR spectrometers, the 195Pt and 103Rh NMR peak profiles acquired within a relatively narrow temperature range (288-300 K) constitute unique 'spectroscopic fingerprints', which allow unambiguous structural assignment in solution. Available data for Pt(iv) and Rh(iii) complexes give rise to intrinsic isotope 1Δδ195Pt/103Rh(37/35Cl) profiles, which are extraordinarily sensitive to the structure of a particular complex or its geometric isomer. The profiles of aquated Pt(iv) and Rh(iii) complexes in acidic solutions may be resolved at either an isotopologue level only or at both an isotopologue and an isotopomer level depending on the structure. By contrast, in the series of [PtCl6-n(OH)n]2- (n = 1-6) anions, 1Δδ195Pt(37/35Cl) isotope shifts are resolved only at an isotopologue level. Relatively larger 1Δ195Pt(18/16O) isotope shifts obtained by the partial 18O enrichment of both the [PtCln(H2O)6-n]4-n (n = 1-6) and [PtCl6-n(OH)n]2- (n = 1-6) series give rise to remarkable 195Pt NMR peak profiles showing both 37/35Cl and 18/16O shifts. In the [PtCl6-n(OH)n]2- (n = 1-5/6) anions a typical NMR peak profile spanning ∼2 ppm only may be resolved at both the isotopologue and isotopomer levels, depending on whether 18/16OH- ions are coordinated trans to chloride ions or not. The potential utility of such 1Δ195Pt(37/35Cl) and 1Δ195Pt(18/16O) isotope shifts in selected practical applications involving such complexes is briefly illustrated.
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Affiliation(s)
- Klaus R Koch
- Department of Chemistry and Polymer Science, Stellenbosch University, P. Bag X1, Matieland, 7602, South Africa.
| | - Leon Engelbrecht
- Department of Chemistry and Polymer Science, Stellenbosch University, P. Bag X1, Matieland, 7602, South Africa.
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10
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Rock W, Oruc ME, Ellis RJ, Uysal A. Molecular Scale Description of Anion Competition on Amine-Functionalized Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:11532-11539. [PMID: 27715067 DOI: 10.1021/acs.langmuir.6b03479] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Many industrial and biological processes involve the competitive adsorption of ions with different valencies and sizes at charged surfaces; heavy and precious metal ions are separated on the basis of their propensity to adsorb onto interfaces, often as anionic ion clusters (e.g., [MClx]n-). However, very little is known, both theoretically and experimentally, about the competition of factors that drive preferential adsorption, such as charge density or valence, at interfaces in technologically relevant systems. There are even contradictory pictures described by interfacial studies and real life applications, such as chlorometalate extractions, in which charge diffuse chlorometalate ions are extracted efficiently even though charge dense chloride ions present in the background are expected to occupy the interface. We studied the competition between divalent chlorometalate anions (PtCl62- and PdCl42-) and monovalent chloride anions on positively charged amine-functionalized surfaces using in situ specular X-ray reflectivity. Chloride anions were present in vast excess to simulate the conditions used in the commercial separation of heavy and precious metal ions. Our results suggest that divalent chlorometalate adsorption is a two-step process and that the divalent anions preferentially adsorb at the interface despite having a charge/volume ratio lower than that of chloride. These results provide fundamental insight into the structural mechanisms that underpin transport in phases that are relevant to heavy and precious metal ion separations, explaining the high efficiency of low charge density ion transport processes in the presence of charge dense anions.
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Affiliation(s)
- William Rock
- Chemical Sciences and Engineering Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Muhammed E Oruc
- Department of Chemical Engineering, Yildiz Technical University , Istanbul, Turkey
| | - Ross J Ellis
- Chemical Sciences and Engineering Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Ahmet Uysal
- Chemical Sciences and Engineering Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
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11
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Ueda Y, Morisada S, Kawakita H, Ohto K. High extraction ability and selectivity of a tripodal pivalamide derivative for Pt(IV) from hydrochloric acid solutions. SEP SCI TECHNOL 2016. [DOI: 10.1080/01496395.2016.1168846] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Yuki Ueda
- Department of Chemistry and Applied Chemistry, Saga University, Saga, Japan
| | - Shintaro Morisada
- Department of Chemistry and Applied Chemistry, Saga University, Saga, Japan
| | - Hidetaka Kawakita
- Department of Chemistry and Applied Chemistry, Saga University, Saga, Japan
| | - Keisuke Ohto
- Department of Chemistry and Applied Chemistry, Saga University, Saga, Japan
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12
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Šebesta F, Sláma V, Melcr J, Futera Z, Burda JV. Estimation of Transition-Metal Empirical Parameters for Molecular Mechanical Force Fields. J Chem Theory Comput 2016; 12:3681-8. [DOI: 10.1021/acs.jctc.6b00416] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Filip Šebesta
- Department of Chemical Physics
and Optics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague 2, Czech Republic
| | - Vladislav Sláma
- Department of Chemical Physics
and Optics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague 2, Czech Republic
| | - Josef Melcr
- Department of Chemical Physics
and Optics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague 2, Czech Republic
| | - Zdeněk Futera
- Department of Chemical Physics
and Optics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague 2, Czech Republic
| | - Jaroslav V. Burda
- Department of Chemical Physics
and Optics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague 2, Czech Republic
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13
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A Comparison of Pt(II) and Pt(IV) Chloride Precursors for Strong Electrostatic Adsorption Synthesis of Pt/Alumina and Pt/Carbon Catalysts. Catal Letters 2015. [DOI: 10.1007/s10562-015-1631-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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Melchior A, Tolazzi M, Martínez JM, Pappalardo RR, Sánchez Marcos E. Hydration of Two Cisplatin Aqua-Derivatives Studied by Quantum Mechanics and Molecular Dynamics Simulations. J Chem Theory Comput 2015; 11:1735-44. [DOI: 10.1021/ct500975a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Andrea Melchior
- Department
of Environmental and Physical Chemistry, University of Udine, 33100 Udine, Udine, Italy
| | - Marilena Tolazzi
- Department
of Environmental and Physical Chemistry, University of Udine, 33100 Udine, Udine, Italy
| | - José Manuel Martínez
- Department
of Physical Chemistry, University of Seville, 41012 Seville, Seville, Spain
| | - Rafael R. Pappalardo
- Department
of Physical Chemistry, University of Seville, 41012 Seville, Seville, Spain
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15
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Kuter D, Streltsov V, Davydova N, Venter GA, Naidoo KJ, Egan TJ. Molecular structures and solvation of free monomeric and dimeric ferriheme in aqueous solution: insights from molecular dynamics simulations and extended X-ray absorption fine structure spectroscopy. Inorg Chem 2014; 53:10811-24. [PMID: 25275882 DOI: 10.1021/ic500454d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
CHARMM force field parameters have been developed to model nonprotein bound five-coordinate ferriheme (ferriprotoporphyrin IX) species in aqueous solution. Structures and solvation were determined from molecular dynamics (MD) simulations at 298 K of monomeric [HO-ferriheme](2-), [H2O-ferriheme](-), and [H2O-ferriheme](0); π-π dimeric [(HO-ferriheme)2](4-), [(H2O-ferriheme)(HO-ferriheme)](3-), [(H2O-ferriheme)2](2-), and [(H2O-ferriheme)2](0); and μ-oxo dimeric [μ-(ferriheme)2O](4-). Solvation of monomeric species predominated around the axial ligand, meso-hydrogen atoms of the porphyrin ring (Hmeso), and the unligated face. Existence of π-π ferriheme dimers in aqueous solution was supported by MD calculations where such dimers remained associated over the course of the simulation. Porphyrin rings were essentially coplanar. In these dimers major and minor solvation was observed around the axial ligand and Hmeso positions, respectively. In μ-oxo ferriheme, strong solvation of the unligated face and bridging oxide ligand was observed. The solution structure of the μ-oxo dimer was investigated using extended X-ray absorption fine structure (EXAFS) spectroscopy. The EXAFS spectrum obtained from frozen solution was markedly different from that recorded on dried μ-oxo ferriheme solid. Inclusion of five solvent molecules obtained from spatial distribution functions in the structure generated from MD simulation was required to produce acceptable fits to the EXAFS spectra of the dimer in solution, while the solid was suitably fitted using the crystal structure of μ-oxo ferriheme dimethyl ester which included no solvent molecules.
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Affiliation(s)
- David Kuter
- Scientific Computing Research Unit, †Department of Chemistry, University of Cape Town , Private Bag, Rondebosch 7701, South Africa
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16
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In-situ monitoring of transition metal complex adsorption on oxide surfaces during the first stages of supported metal catalyst preparation. Catal Today 2014. [DOI: 10.1016/j.cattod.2014.03.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Hervier A, Blanchard J, Costentin G, Regalbuto J, Louis C, Boujday S. The genesis of a heterogeneous catalyst: in situ observation of a transition metal complex adsorbing onto an oxide surface in solution. Chem Commun (Camb) 2014; 50:2409-11. [DOI: 10.1039/c3cc48838a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal complex adsorption onto an oxide surface was observed in situ using a quartz crystal microbalance at the solid–liquid interface.
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Affiliation(s)
- Antoine Hervier
- Sorbonne Universités
- UPMC Univ Paris 6
- UMR CNRS 7197
- Laboratoire de Réactivité de Surface
- F75005 Paris, France
| | - Juliette Blanchard
- Sorbonne Universités
- UPMC Univ Paris 6
- UMR CNRS 7197
- Laboratoire de Réactivité de Surface
- F75005 Paris, France
| | - Guylène Costentin
- Sorbonne Universités
- UPMC Univ Paris 6
- UMR CNRS 7197
- Laboratoire de Réactivité de Surface
- F75005 Paris, France
| | - John Regalbuto
- University of South Carolina
- Chemical Engineering
- Columbia, USA
| | - Catherine Louis
- Sorbonne Universités
- UPMC Univ Paris 6
- UMR CNRS 7197
- Laboratoire de Réactivité de Surface
- F75005 Paris, France
| | - Souhir Boujday
- Sorbonne Universités
- UPMC Univ Paris 6
- UMR CNRS 7197
- Laboratoire de Réactivité de Surface
- F75005 Paris, France
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18
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Melchior A, Martínez JM, Pappalardo RR, Sánchez Marcos E. Hydration of Cisplatin Studied by an Effective Ab Initio Pair Potential Including Solute–Solvent Polarization. J Chem Theory Comput 2013; 9:4562-73. [DOI: 10.1021/ct400433c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Andrea Melchior
- University of Udine, Department of Environmental and
Physical Chemistry, 33100 Udine, Italy
- University of Seville, Department of Physical Chemistry, 41012 Seville, Spain
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19
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Mori H, Hirayama N, Komeiji Y, Mochizuki Y. Differences in hydration between cis- and trans-platin: Quantum insights by ab initio fragment molecular orbital-based molecular dynamics (FMO-MD). COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.02.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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20
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Matthews RP, Venter GA, Naidoo KJ. Using Solvent Binding and Dielectric Friction To Interpret the Hydration Behavior of Complex Anions. J Phys Chem B 2011; 115:1045-55. [DOI: 10.1021/jp109976p] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Richard P. Matthews
- Scientific Computing Research Unit and Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
| | - Gerhard A. Venter
- Scientific Computing Research Unit and Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
| | - Kevin J. Naidoo
- Scientific Computing Research Unit and Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
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21
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Matthews RP, Naidoo KJ. Experimentally Consistent Ion Association Predicted for Metal Solutions from Free Energy Simulations. J Phys Chem B 2010; 114:7286-93. [DOI: 10.1021/jp911823x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Richard P. Matthews
- Scientific Computing Research Unit, University of Cape Town, Rondebosch 7701, South Africa, and Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
| | - Kevin J. Naidoo
- Scientific Computing Research Unit, University of Cape Town, Rondebosch 7701, South Africa, and Department of Chemistry, University of Cape Town, Rondebosch 7701, South Africa
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22
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Fu CF, Tian SX. Molecular dynamics study of solvation differences between cis- and transplatin molecules in water. J Chem Phys 2010; 132:174507. [DOI: 10.1063/1.3426029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Truflandier LA, Autschbach J. Probing the Solvent Shell with 195Pt Chemical Shifts: Density Functional Theory Molecular Dynamics Study of PtII and PtIV Anionic Complexes in Aqueous Solution. J Am Chem Soc 2010; 132:3472-83. [DOI: 10.1021/ja9096863] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lionel A. Truflandier
- Department of Chemistry, 312 Natural Sciences Complex, State University of New York, Buffalo, New York 14260-3000
| | - Jochen Autschbach
- Department of Chemistry, 312 Natural Sciences Complex, State University of New York, Buffalo, New York 14260-3000
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24
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Chval Z, Sip M, Burda JV. The trans effect in square-planar platinum(II) complexes-A density functional study. J Comput Chem 2008; 29:2370-81. [DOI: 10.1002/jcc.20980] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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25
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Potential Energy Surfaces for Ligand Exchange Reactions of Square Planar Diamagnetic PtY2L2 Complexes:Hydrogen Bond (PtY2L2…L') versus Apical (Y2L2Pt…L') Interaction. B KOREAN CHEM SOC 2006. [DOI: 10.5012/bkcs.2006.27.9.1405] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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26
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Kramer J, Koch KR. 195Pt NMR Study of the Speciation and Preferential Extraction of Pt(IV)−Mixed Halide Complexes by Diethylenetriamine-Modified Silica-Based Anion Exchangers. Inorg Chem 2006; 45:7843-55. [PMID: 16961377 DOI: 10.1021/ic0609655] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A detailed 195Pt NMR study of the distribution of Pt(IV) complex species resulting from the aquation of H2PtCl6, H2PtBr6, and mixtures of H2PtCl6/H2PtBr6 in water/dilute HClO4 has been carried out to obtain an understanding of the speciation in these solutions as relevant to the recovery of Pt(IV) complexes from process solutions. A species distribution plot of the [PtCl6]2-, [PtCl5(H2O)]-, and [PtCl4(H2O)2] shows that in equilibrated, relatively concentrated H2PtCl6 solutions ([Pt]t > 0.12 M), the [PtCl4(H2O)2] species is below the 195Pt NMR detection limit; for [Pt]t concentrations < 0.1 M, the relative concentrations of the [PtCl5(H2O)]- and [PtCl4(H2O)2] species increase significantly, as a result of relatively rapid aquation of the [PtCl6]2- and [PtCl5(H2O)]- complexes under these conditions. From this (195)Pt NMR data the aquation constants of [PtCl6]2- and [PtBr6]2- of log K6 approximately 1.75 +/- 0.05 and log K6 approximately 2.71 +/- 0.15, respectively, have been determined at 30 degrees C. In mixtures of H2PtCl6/H2PtBr6 in water, a number of previously unidentified aquated complexes of the general formula [PtCl(5-n)Br(n)(H2O)]- (n = 0-5) could be identified, including the possible geometrical isomers of these complexes. These 195Pt NMR assignments were confirmed by remarkably systematic, linear relationships between the 195Pt chemical shift increments induced by substitution of Cl- ions by n Br- ions in [PtCl(6-n)Br(n)]2- and [PtCl(5-n)Br(n)(H2O)]- complexes. Preferential extraction of the [PtX6]2- (X = Cl, Br, or a mixture of the two halides) species over their corresponding aquated [PtX5(H2O)]- counterparts by silica-based diethylenetriamine anion exchangers could be demonstrated by means of 195Pt NMR spectroscopy.
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Affiliation(s)
- Jurjen Kramer
- Department of Chemistry and Polymer Science, University of Stellenbosch, Private Bag X1, Matieland, 7602 Stellenbosch, South Africa
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27
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Lopes JF, de A Menezes VS, Duarte HA, Rocha WR, De Almeida WB, Dos Santos HF. Monte Carlo Simulation of Cisplatin Molecule in Aqueous Solution. J Phys Chem B 2006; 110:12047-54. [PMID: 16800515 DOI: 10.1021/jp057448c] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The Lennard-Jones (12-6) parameters were obtained for all atoms of cisplatin molecule using the ab initio quantum mechanical potential energy surface for the water-cisplatin interaction as reference data. The parameters found were (epsilon/kcal.mol(-1) and sigma/angstroms) 1.0550, 3.6590 (Pt); 0.0381, 4.6272 (Cl); 0.0455, 3.3783 (N); and 0.0185, 0.0936 (H) and provided very good results for the description of the aqueous solution of cisplatin through Monte Carlo simulation. From statistical analysis of solute-solvent interactions, we observed that the NH3 groups are involved in 53% of the calculated hydrogen bonds with a significant contribution from chlorides (41%) and only 6% involving the Pt center. This is in agreement with the expected behavior for such molecules. Two hydration shells with 22 and 81 water molecules, respectively, centered around 4.6 and 7.3 angstroms were found from the center of mass pair correlation function analysis. The cisplatin atomic Lennard-Jones parameters are reported for the first time, and they might be useful for studying the structure, properties, and processes of cisplatin-like molecules in aqueous solution, including explicitly the solvent effect.
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Affiliation(s)
- Juliana Fedoce Lopes
- NEQC: Núcleo de Estudos em Química Computacional, Departamento de Química, ICE, Universidade Federal de Juiz de Fora, Campus Martelos, CEP 36036-900, Juiz de Fora, MG, Brazil
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28
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Koch KR, Burger MR, Kramer J, Westra AN. 195Pt NMR and DFT computational methods as tools towards the understanding of speciation and hydration/solvation of [PtX6]2−(X = Cl−, Br−) anions in solution. Dalton Trans 2006:3277-84. [PMID: 16820837 DOI: 10.1039/b605182k] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
195Pt NMR together with DFT calculations and MD simulations, offer a powerful toolkit with which to probe the hydration shells of the [PtCl6]2- anions, which may lead to a more profound understanding of the solute-solvent interactions of such complexes.
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Affiliation(s)
- Klaus R Koch
- Department of Chemistry and Polymer Science, University of Stellenbosch, P. Bag X1, Matieland, 7602, South Africa.
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29
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Martínez JM, Torrico F, Pappalardo RR, Sánchez Marcos E. Understanding the Hydration Structure of Square-Planar Aquaions: The [Pd(H2O)4]2+ Case. J Phys Chem B 2004. [DOI: 10.1021/jp049119a] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- José M. Martínez
- Departamento de Quimica Fısica, Universidad de Sevilla, 41012-Sevilla, Spain
| | - Francisco Torrico
- Departamento de Quimica Fısica, Universidad de Sevilla, 41012-Sevilla, Spain
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30
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Naidoo KJ, Lopis AS, Westra AN, Robinson DJ, Koch KR. Contact Ion Pair between Na+ and PtCl62- Favored in Methanol. J Am Chem Soc 2003; 125:13330-1. [PMID: 14583008 DOI: 10.1021/ja035326x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ion-pair formation between a Na+ cation and the [PtCl62-] anion in methanol is observed from195Pt NMR chemical shift trends as well as from molecular dynamics computer simulations. Free energy of association calculations reveal that contact ion pairs (CIPs) are the most favored configuration in methanol, followed by solvent shared ion pairs (SSHIPs). By contrast, such ion-pair formation is not observed for comparable solutions in water.
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Affiliation(s)
- Kevin J Naidoo
- Department of Chemistry, University of Cape Town, Rondebosch, 7701, South Africa.
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