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Holmes ST, Bai S, Iuliucci RJ, Mueller KT, Dybowski C. Calculations of solid‐state
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Ca NMR parameters: A comparison of periodic and cluster approaches and an evaluation of DFT functionals. J Comput Chem 2017; 38:949-956. [DOI: 10.1002/jcc.24763] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 11/29/2016] [Accepted: 01/30/2017] [Indexed: 01/18/2023]
Affiliation(s)
- Sean T. Holmes
- Department of Chemistry and BiochemistryUniversity of DelawareNewark Delaware19716
| | - Shi Bai
- Department of Chemistry and BiochemistryUniversity of DelawareNewark Delaware19716
| | - Robbie J. Iuliucci
- Department of ChemistryWashington and Jefferson CollegeWashington Pennsylvania15301
| | - Karl T. Mueller
- Department of ChemistryPennsylvania State University, University Park Pennsylvania16802
- Physical and Computational Sciences Directorate, Pacific Northwest National LaboratoryRichland Washington99352
| | - Cecil Dybowski
- Department of Chemistry and BiochemistryUniversity of DelawareNewark Delaware19716
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Alkan F, Holmes ST, Iuliucci RJ, Mueller KT, Dybowski C. Spin-orbit effects on the (119)Sn magnetic-shielding tensor in solids: a ZORA/DFT investigation. Phys Chem Chem Phys 2016; 18:18914-22. [PMID: 27354312 DOI: 10.1039/c6cp03807g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Periodic-boundary and cluster calculations of the magnetic-shielding tensors of (119)Sn sites in various co-ordination and stereochemical environments are reported. The results indicate a significant difference between the predicted NMR chemical shifts for tin(ii) sites that exhibit stereochemically-active lone pairs and tin(iv) sites that do not have stereochemically-active lone pairs. The predicted magnetic shieldings determined either with the cluster model treated with the ZORA/Scalar Hamiltonian or with the GIPAW formalism are dependent on the oxidation state and the co-ordination geometry of the tin atom. The inclusion of relativistic effects at the spin-orbit level removes systematic differences in computed magnetic-shielding parameters between tin sites of differing stereochemistries, and brings computed NMR shielding parameters into significant agreement with experimentally-determined chemical-shift principal values. Slight improvement in agreement with experiment is noted in calculations using hybrid exchange-correlation functionals.
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Affiliation(s)
- Fahri Alkan
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA.
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Holmes ST, Alkan F, Iuliucci RJ, Mueller KT, Dybowski C. Analysis of the bond‐valence method for calculating
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Si and
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P magnetic shielding in covalent network solids. J Comput Chem 2016; 37:1704-10. [DOI: 10.1002/jcc.24389] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/14/2016] [Accepted: 03/27/2016] [Indexed: 02/06/2023]
Affiliation(s)
- Sean T. Holmes
- Department of Chemistry and BiochemistryUniversity of DelawareNewark Delaware19716
| | - Fahri Alkan
- Department of Chemistry and BiochemistryUniversity of DelawareNewark Delaware19716
| | - Robbie J. Iuliucci
- Department of ChemistryWashington and Jefferson CollegeWashington Pennsylvania15301
| | - Karl T. Mueller
- Department of ChemistryPennsylvania State UniversityUniversity Park Pennsylvania16802
- Physical and Computational Sciences DirectoratePacific Northwest National LaboratoryRichland Washington99352
| | - Cecil Dybowski
- Department of Chemistry and BiochemistryUniversity of DelawareNewark Delaware19716
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Holmes ST, Iuliucci RJ, Mueller KT, Dybowski C. Critical Analysis of Cluster Models and Exchange-Correlation Functionals for Calculating Magnetic Shielding in Molecular Solids. J Chem Theory Comput 2015; 11:5229-41. [DOI: 10.1021/acs.jctc.5b00752] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sean T. Holmes
- Department
of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Robbie J. Iuliucci
- Department
of Chemistry, Washington and Jefferson College, Washington, Pennsylvania 15301, United States
| | - Karl T. Mueller
- Department
of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Physical
and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Cecil Dybowski
- Department
of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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Alkan F, Dybowski C. Chemical-shift tensors of heavy nuclei in network solids: a DFT/ZORA investigation of 207Pb chemical-shift tensors using the bond-valence method. Phys Chem Chem Phys 2015; 17:25014-26. [DOI: 10.1039/c5cp03348a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Accurate computation of 207Pb magnetic shielding principal components is within the reach of quantum chemistry methods by employing relativistic ZORA/DFT and cluster models adapted from the bond valence model.
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Affiliation(s)
- Fahri Alkan
- Department of Chemistry and Biochemistry
- University of Delaware
- Newark
- USA
| | - C. Dybowski
- Department of Chemistry and Biochemistry
- University of Delaware
- Newark
- USA
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Holmes ST, Iuliucci RJ, Mueller KT, Dybowski C. Density functional investigation of intermolecular effects on 13C NMR chemical-shielding tensors modeled with molecular clusters. J Chem Phys 2014; 141:164121. [DOI: 10.1063/1.4900158] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Sean T. Holmes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
| | - Robbie J. Iuliucci
- Department of Chemistry, Washington and Jefferson College, Washington, Pennsylvania 15301, USA
| | - Karl T. Mueller
- Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, USA
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Cecil Dybowski
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
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Alkan F, Dybowski C. Calculation of chemical-shift tensors of heavy nuclei: a DFT/ZORA investigation of 199Hg chemical-shift tensors in solids, and the effects of cluster size and electronic-state approximations. Phys Chem Chem Phys 2014; 16:14298-308. [DOI: 10.1039/c4cp01682c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A ZORA/DFT investigation of the NMR chemical shielding of a suite of 199Hg-containing solid materials shows the importance of calculations with the molecular-cluster method.
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Affiliation(s)
- Fahri Alkan
- Department of Chemistry and Biochemistry
- University of Delaware
- Newark, USA
| | - C. Dybowski
- Department of Chemistry and Biochemistry
- University of Delaware
- Newark, USA
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Bonhomme C, Gervais C, Babonneau F, Coelho C, Pourpoint F, Azaïs T, Ashbrook SE, Griffin JM, Yates JR, Mauri F, Pickard CJ. First-principles calculation of NMR parameters using the gauge including projector augmented wave method: a chemist's point of view. Chem Rev 2012; 112:5733-79. [PMID: 23113537 DOI: 10.1021/cr300108a] [Citation(s) in RCA: 318] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Christian Bonhomme
- Laboratoire de Chimie de la Matière Condensée de Paris, Université Pierre et Marie Curie, CNRS UMR, Collège de France, France.
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Pechkis DL, Walter EJ, Krakauer H. High sensitivity of O17 NMR to p-d hybridization in transition metal perovskites: First principles calculations of large anisotropic chemical shielding. J Chem Phys 2009; 131:184511. [DOI: 10.1063/1.3257625] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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One-electron quantum capping potential for hybrid QM/MM studies of silicate molecules and solids. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.01.073] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Nachtigall P, Sauer J. Applications of Quantum Chemical Methods in Zeolite Science. STUDIES IN SURFACE SCIENCE AND CATALYSIS 2007. [DOI: 10.1016/s0167-2991(07)80808-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Truflandier L, Paris M, Payen C, Boucher F. First-Principles Calculations within Periodic Boundary Conditions of the NMR Shielding Tensor for a Transition Metal Nucleus in a Solid State System: The Example of 51V in AlVO4. J Phys Chem B 2006; 110:21403-7. [PMID: 17064085 DOI: 10.1021/jp0648137] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We present the first density functional theory based calculations of NMR shielding parameters for a transition metal nucleus using periodic boundary conditions. These calculations employ the gauge-including projected augmented-wave pseudopotential approach. The quality of this method is discussed by comparing experimental and calculated chemical shift tensor eigenvalues for the quadrupolar 51V nucleus in the diamagnetic solid-state compound AlVO4. Furthermore, the combination of shielding tensor with fast and accurate projector augmented-wave electric field gradient tensor calculations allows us to determine the relative orientation of these two tensors.
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Corminboeuf C, Tran F, Weber J. The role of density functional theory in chemistry: Some historical landmarks and applications to zeolites. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.theochem.2005.07.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Wang Y, Zhou D, Yang G, Miao S, Liu X, Bao X. A DFT Study on Isomorphously Substituted MCM-22 Zeolite. J Phys Chem A 2004. [DOI: 10.1021/jp0376875] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yan Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, Liaoning, China
| | - Danhong Zhou
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, Liaoning, China
| | - Gang Yang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, Liaoning, China
| | - Shaojun Miao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, Liaoning, China
| | - Xiancun Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, Liaoning, China
| | - Xinhe Bao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, Liaoning, China
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Krishnamurty S, Heine T, Goursot A. Influence of Dynamics on the Structure and NMR Chemical Shift of a Zeolite Precursor. J Phys Chem B 2003. [DOI: 10.1021/jp022686i] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sailaja Krishnamurty
- LMCCCO UMR-CNRS 5618, ENSCM, 8 Rue de l'Ecole Normale, 34296, Montpellier Cédex 5, France, Department of Physical Chemistry, Université de Genève, 30 quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland, and Inst. f. Physikalische Chemie, TU Dresden, D-01169 Dresden, Germany
| | - Thomas Heine
- LMCCCO UMR-CNRS 5618, ENSCM, 8 Rue de l'Ecole Normale, 34296, Montpellier Cédex 5, France, Department of Physical Chemistry, Université de Genève, 30 quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland, and Inst. f. Physikalische Chemie, TU Dresden, D-01169 Dresden, Germany
| | - Annick Goursot
- LMCCCO UMR-CNRS 5618, ENSCM, 8 Rue de l'Ecole Normale, 34296, Montpellier Cédex 5, France, Department of Physical Chemistry, Université de Genève, 30 quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland, and Inst. f. Physikalische Chemie, TU Dresden, D-01169 Dresden, Germany
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Piana S, Sebastiani D, Carloni P, Parrinello M. Ab initio molecular dynamics-based assignment of the protonation state of pepstatin A/HIV-1 protease cleavage site. J Am Chem Soc 2001; 123:8730-7. [PMID: 11535077 DOI: 10.1021/ja003145e] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A recent 13C NMR experiment (Smith et al. Nature Struct. Biol. 1996, 3, 946-950) on the Asp 25-Asp25' dyad in pepstatin A/HIV-1 protease measured two separate resonance lines, which were interpreted as being a singly protonated dyad. We address this issue by performing ab initio molecular dynamics calculations on models for this site accompanied by calculations of 13C NMR chemical shifts and isotopic shifts. We find that already on the picosecond time-scale the model proposed by Smith et al. is not stable and evolves toward a different monoprotonated form whose NMR pattern differs from the experimental one. We suggest, instead, a different protonation state in which both aspartic groups are protonated. Despite the symmetric protonation state, the calculated 13C NMR properties are in good agreement with the experiment. We rationalize this result using a simple valence bond model, which explains the chemical inequality of the two C sites. The model calculations, together with our calculations on the complex, allow also the rationalization of 13C NMR properties on other HIV-1 PR/inhibitor complexes. Both putative binding of the substrate to the free enzyme, which has the dyad singly protonated (Piana, S.; Carloni, P. Proteins: Struct., Funct., Genet. 2000, 39, 26-36), and pepstatin A binding to the diprotonated form are consistent with the inverse solvent isotope effect on the onset of inhibition of pepsin by pepstatin and the kinetic iso-mechanism proposed for aspartic proteases (Cho, T.-K.; Rebholz, K.; Northrop, D.B. Biochemistry 1994, 33, 9637-9642).
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Affiliation(s)
- S Piana
- Scuola Internazionale Superiore di Studi Avanzati and Istituto Nazionale di Fisica della Materia, Via Beirut 2-4, 34014 Trieste, Italy
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Heine T, Goursot A, Seifert G, Weber J. Performance of DFT for 29Si NMR Chemical Shifts of Silanes. J Phys Chem A 2000. [DOI: 10.1021/jp002495k] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas Heine
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland, UMR 5618 CNRS, Ecole de chimie, 8 rue de l'Ecole Normale, 34296 Montpellier Cédex 5, France, and Universität-GH Paderborn, Paderborn, FB6 Theoretische Physik, D-33095 Paderborn, Germany
| | - Annick Goursot
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland, UMR 5618 CNRS, Ecole de chimie, 8 rue de l'Ecole Normale, 34296 Montpellier Cédex 5, France, and Universität-GH Paderborn, Paderborn, FB6 Theoretische Physik, D-33095 Paderborn, Germany
| | - Gotthard Seifert
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland, UMR 5618 CNRS, Ecole de chimie, 8 rue de l'Ecole Normale, 34296 Montpellier Cédex 5, France, and Universität-GH Paderborn, Paderborn, FB6 Theoretische Physik, D-33095 Paderborn, Germany
| | - Jacques Weber
- Department of Physical Chemistry, University of Geneva, 30 Quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland, UMR 5618 CNRS, Ecole de chimie, 8 rue de l'Ecole Normale, 34296 Montpellier Cédex 5, France, and Universität-GH Paderborn, Paderborn, FB6 Theoretische Physik, D-33095 Paderborn, Germany
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Xue X, Kanzaki M. An ab initio calculation of 17O and 29Si NMR parameters for SiO2 polymorphs. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2000; 16:245-259. [PMID: 10928629 DOI: 10.1016/s0926-2040(00)00075-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Ab initio molecular orbital calculations (Hartree-Fock, HF and density functional theories, DFTs) have been carried out for SiO2 polymorphs coesite, low cristobalite, and alpha-quartz, in order to investigate the reliability of this method for predicting 29Si and 17O nuclear magnetic resonance (NMR) properties of silicates. Oxygen- and silicon-centered clusters consisting of one (1T) to three tetrahedral (3T) shells (one to four atomic shells), taken from real crystal structure, have been investigated. It is found that for reasonable predication of both the 29Si and 17O chemical shifts (deltaSi and delta(i)O), the minimum cluster is one that gives the correct second neighbors to the nucleus of interest. Both the delta(i)Si and delta(i)O have reached convergence with respect to cluster size at the OH-terminated two tetrahedral (2T) shell (three atomic shells around Si and four atomic shells around O) model. At convergence, the calculated delta(i)Si values agree well (within +/- 1 ppm) with experimental data. The calculated 17O electric field gradient (EFG)-related parameters also agree with experimental data within experimental uncertainties. The calculation also reproduces small differences in delta(i)O for O sites with similar tetrahedral connectivities, but shows deviations up to about 10 ppm in relative difference for O sites with different tetrahedral connectivities. The poor performance for the latter is mainly due to the approximations of the HF method. Our study thus suggests that the ab initio calculation method is a reliable mean for predicting 29Si and 17O NMR parameters for silicates. Such an approach should find application not only to well-ordered crystalline phases, but also to disordered materials, by combining with other techniques, such as the molecular dynamics simulation method.
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Affiliation(s)
- X Xue
- Institute for Study of the Earth's Interior, Okayama University, Tottori, Japan.
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Bull LM, Bussemer B, Anupõld T, Reinhold A, Samoson A, Sauer J, Cheetham AK, Dupree R. A High-Resolution 17O and 29Si NMR Study of Zeolite Siliceous Ferrierite and ab Initio Calculations of NMR Parameters. J Am Chem Soc 2000. [DOI: 10.1021/ja993339y] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- L. M. Bull
- Contribution from the Institut des Matériaux Jean Rouxel, 2 rue de la Houssinière, B.P. 32229, 44322 Nantes, Cedex 3, France, Humboldt-Universität, Institut für Chemie, Berlin, D-10117, Germany, National Institute of Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia, Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Physics Department, University of Warwick, Coventry, U.K
| | - B. Bussemer
- Contribution from the Institut des Matériaux Jean Rouxel, 2 rue de la Houssinière, B.P. 32229, 44322 Nantes, Cedex 3, France, Humboldt-Universität, Institut für Chemie, Berlin, D-10117, Germany, National Institute of Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia, Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Physics Department, University of Warwick, Coventry, U.K
| | - T. Anupõld
- Contribution from the Institut des Matériaux Jean Rouxel, 2 rue de la Houssinière, B.P. 32229, 44322 Nantes, Cedex 3, France, Humboldt-Universität, Institut für Chemie, Berlin, D-10117, Germany, National Institute of Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia, Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Physics Department, University of Warwick, Coventry, U.K
| | - A. Reinhold
- Contribution from the Institut des Matériaux Jean Rouxel, 2 rue de la Houssinière, B.P. 32229, 44322 Nantes, Cedex 3, France, Humboldt-Universität, Institut für Chemie, Berlin, D-10117, Germany, National Institute of Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia, Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Physics Department, University of Warwick, Coventry, U.K
| | - A. Samoson
- Contribution from the Institut des Matériaux Jean Rouxel, 2 rue de la Houssinière, B.P. 32229, 44322 Nantes, Cedex 3, France, Humboldt-Universität, Institut für Chemie, Berlin, D-10117, Germany, National Institute of Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia, Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Physics Department, University of Warwick, Coventry, U.K
| | - J. Sauer
- Contribution from the Institut des Matériaux Jean Rouxel, 2 rue de la Houssinière, B.P. 32229, 44322 Nantes, Cedex 3, France, Humboldt-Universität, Institut für Chemie, Berlin, D-10117, Germany, National Institute of Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia, Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Physics Department, University of Warwick, Coventry, U.K
| | - A. K. Cheetham
- Contribution from the Institut des Matériaux Jean Rouxel, 2 rue de la Houssinière, B.P. 32229, 44322 Nantes, Cedex 3, France, Humboldt-Universität, Institut für Chemie, Berlin, D-10117, Germany, National Institute of Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia, Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Physics Department, University of Warwick, Coventry, U.K
| | - R. Dupree
- Contribution from the Institut des Matériaux Jean Rouxel, 2 rue de la Houssinière, B.P. 32229, 44322 Nantes, Cedex 3, France, Humboldt-Universität, Institut für Chemie, Berlin, D-10117, Germany, National Institute of Chemical Physics and Biophysics, Akadeemia Tee 23, Tallinn, Estonia, Materials Research Laboratory, University of California, Santa Barbara, California 93106, and Physics Department, University of Warwick, Coventry, U.K
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Montalti M, Wadhwa S, Kim WY, Kipp RA, Schmehl RH. Luminescent ruthenium(II) bipyridyl-phosphonic acid complexes: pH dependent photophysical behavior and quenching with divalent metal ions. Inorg Chem 2000; 39:76-84. [PMID: 11229038 DOI: 10.1021/ic991143t] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis, redox behavior, and photophysical properties of a series of Ru(II) bipyridyl complexes having diimine ligands with phosphonate and phosphonic acid substituents are presented. The phosphonate-containing ligands examined include diethyl 4-(2,2'-bipyrid-4-yl)benzylphosphonate (bpbzp), diethyl 4-(2,2'-bipyrid-4-yl)-phenylphosphonate (bppp), and 4,4'-(diethyl phosphonato)-2,2'-bipyridine (bpdp), and the [(bpy)2Ru(L)](PF6)2 complexes of both the diethyl phosphonate and the phosphonic acid were prepared. The Ru(III/II) potentials are more positive for the phosphonate complexes than for the phosphonic acids, and the first reduction is localized on the phosphonate-containing ligand for the bppp and bpdp complexes. The first reduction of the phosphonic acid complexes is at more negative potentials and cannot be distinguished from bpy reduction. For the bppp and bpdp complexes luminescence arises from a Ru(d pi)-->bpy-phosphonate (pi*) MLCT state; the phosphonic acid complexes luminescence at higher energies from a MLCT state not clearly isolated on one ligand. Iron(III) and copper(II) complex with and very efficiently quench the luminescence of all the phosphonic acid complexes in nonaqueous solvents. The quenching mechanism is discussed on the basis of luminescence decay and picosecond transient absorption measurements.
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Affiliation(s)
- M Montalti
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA
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