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Tahir M, Aftab H, Shafiq I, Khalid M, Haq S, El-Kott AF, Zein MA, Hani U, Shafiq Z. Synthesis, characterization and NLO properties of 1,4-phenylenediamine-based Schiff bases: a combined theoretical and experimental approach. RSC Adv 2024; 14:4221-4229. [PMID: 38292270 PMCID: PMC10826287 DOI: 10.1039/d3ra07642c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 01/01/2024] [Indexed: 02/01/2024] Open
Abstract
In the current study, three novel 1,4-phenylenediamine-based chromophores (3a-3c) were synthesized and characterized and then their nonlinear optical (NLO) characteristics were explored theoretically. The characterization was done by spectroscopic analysis, i.e. FT-IR, UV-Visible, and NMR spectroscopy, and elemental analysis. Notably, these chromophores exhibited UV-Visible absorption within the range of 378.635-384.757 nm in acetonitrile solvent. Additionally, the FMO findings for 3a-3c revealed the narrowest band gap (4.129 eV) for 3c. The GRPs for these chromophores were derived from HOMO-LUMO energy values, which showed correspondence with FMO results by depicting a minimum hardness (2.065 eV) for 3c. Among these compounds, 3c displayed the highest nonlinear behavior with maximum μtot, βtot and γtot values of 4.79 D, 8.00 × 10-30 and 8.13 × 10-34 a.u., respectively. Our findings disclosed that the synthesized 1,4-phenylenediamine chromophores may be considered promising candidates for nonlinear optical materials, showing potential applications in the realm of optoelectronic devices.
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Affiliation(s)
- Muhammad Tahir
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan
| | - Hina Aftab
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan
| | - Iqra Shafiq
- Institute of Chemistry, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
- Centre for Theoretical and Computational Research, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
| | - Muhammad Khalid
- Institute of Chemistry, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
- Centre for Theoretical and Computational Research, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
| | - Saadia Haq
- Institute of Chemistry, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
- Centre for Theoretical and Computational Research, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
| | - Attalla F El-Kott
- Biology Department, College of Science, King Khalid University Abha Saudi Arabia
- Zoology Department, College of Science, Damanhour University Egypt
| | - Mohamed Abdellatif Zein
- Chemistry Department, University College of AlWajh, University of Tabuk Tabuk Saudi Arabia
- Chemistry Department, Faculty of Science, Damanhour University Egypt
| | - Umme Hani
- Institute of Chemistry, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
- Centre for Theoretical and Computational Research, Khwaja Fareed University of Engineering & Information Technology Rahim Yar Khan 64200 Pakistan
| | - Zahid Shafiq
- Institute of Chemical Sciences, Bahauddin Zakariya University Multan 60800 Pakistan
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Schattenberg CJ, Lehmann M, Bühl M, Kaupp M. Systematic Evaluation of Modern Density Functional Methods for the Computation of NMR Shifts of 3d Transition-Metal Nuclei. J Chem Theory Comput 2021; 18:273-292. [PMID: 34968062 DOI: 10.1021/acs.jctc.1c00964] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A wide range of density functionals from all rungs of Jacob's ladder have been evaluated systematically for a set of experimental 3d transition-metal NMR shifts of 70 complexes encompassing 12 × 49Ti, 10 × 51V, 10 × 53Cr, 11 × 55Mn, 9 × 57Fe, 9 × 59Co, and 9 × 61Ni shift values, as well as a diverse range of electronic structure characteristics. The overall 39 functionals evaluated include one LDA, eight GGAs, seven meta-GGAs (including their current-density-functional─CDFT─versions), nine global hybrids, four range-separated hybrids, eight local hybrids, and two double hybrids, and we also include Hartree-Fock and MP2 calculations. While recent evaluations of the same functionals for a very large coupled-cluster-based benchmark of main-group shieldings and shifts achieved in some cases aggregate percentage mean absolute errors clearly below 2%, the best results for the present 3d-nuclei set are in the range between 4 and 5%. Strikingly, the overall best-performing functionals are the recently implemented CDFT versions of two meta-GGAs, namely cM06-L (4.0%) and cVSXC (4.3%), followed by cLH14t-calPBE (4.9%), B3LYP (5.0%), and cLH07t-SVWN (5.1%), i.e., the previously best-performing global hybrid and two local hybrids. A number of further functionals achieve aggregate deviations in the range 5-6%. Range-separated hybrids offer no particular advantage over global hybrids. Due to the overall poor performance of Hartree-Fock theory for all systems except the titanium complexes, MP2 and double-hybrid functionals are unsuitable for these 3d-nucleus shifts and provide large errors. Global hybrid functionals with larger EXX admixtures, such as BHLYP or M06-2X, also perform poorly, and some other highly parametrized global hybrids also are unsuitable. For many functionals depending on local kinetic energy τ, their CDFT variants perform much better than their "non-CDFT" versions. This holds notably also for the above-mentioned M06-L and VSXC, while the effect is small for τ-dependent local hybrids and can even be somewhat detrimental to the agreement with experiment for a few other cases. The separation between well-performing and more poorly performing functionals is mainly determined by their results for the most critical nuclei 55Mn, 57Fe, and 59Co. Here either moderate exact-exchange admixtures or CDFT versions of meta-GGAs are beneficial for the accuracy. The overall deviations of the better-performing global or local hybrids are then typically dominated by the 53Cr shifts, where triplet instabilities appear to disfavor exact-exchange admixture. Further detailed analyses help to pinpoint specific nuclei and specific types of complexes that are challenges for a given functional.
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Affiliation(s)
- Caspar Jonas Schattenberg
- Institut für Chemie, Theoretische Chemie/Quantenchemie Sekretariat C7, Technische Universität Berlin, Straße des 17. Juni 135, D-10623, Berlin, Germany
| | - Morten Lehmann
- Institut für Chemie, Theoretische Chemie/Quantenchemie Sekretariat C7, Technische Universität Berlin, Straße des 17. Juni 135, D-10623, Berlin, Germany
| | - Michael Bühl
- School of Chemistry, University of St. Andrews, Purdie Building, North Haugh, St Andrews KY16 9ST, Fife, U.K
| | - Martin Kaupp
- Institut für Chemie, Theoretische Chemie/Quantenchemie Sekretariat C7, Technische Universität Berlin, Straße des 17. Juni 135, D-10623, Berlin, Germany
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3
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Lu J, Scheiner S. Relationships between Bond Strength and Spectroscopic Quantities in H-Bonds and Related Halogen, Chalcogen, and Pnicogen Bonds. J Phys Chem A 2020; 124:7716-7725. [DOI: 10.1021/acs.jpca.0c05936] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jia Lu
- Department of Chemistry and Biochemistry, Utah State University , Logan, Utah 84322-0300, United States
| | - Steve Scheiner
- Department of Chemistry and Biochemistry, Utah State University , Logan, Utah 84322-0300, United States
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Prokopiou G, Autschbach J, Kronik L. Assessment of the Performance of Optimally Tuned Range‐Separated Hybrid Functionals for Nuclear Magnetic Shielding Calculations. ADVANCED THEORY AND SIMULATIONS 2020. [DOI: 10.1002/adts.202000083] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Georgia Prokopiou
- Department of Materials and InterfacesWeizmann Institute of ScienceRehovot 76100 Israel
| | - Jochen Autschbach
- Department of ChemistryState University of New York at BuffaloBuffalo NY 14260‐3000 USA
| | - Leeor Kronik
- Department of Materials and InterfacesWeizmann Institute of ScienceRehovot 76100 Israel
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Vı́cha J, Novotný J, Komorovsky S, Straka M, Kaupp M, Marek R. Relativistic Heavy-Neighbor-Atom Effects on NMR Shifts: Concepts and Trends Across the Periodic Table. Chem Rev 2020; 120:7065-7103. [DOI: 10.1021/acs.chemrev.9b00785] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jan Vı́cha
- Centre of Polymer Systems, Tomas Bata University in Zlı́n, tř. Tomáše Bati 5678, CZ-76001 Zlı́n, Czechia
| | - Jan Novotný
- CEITEC - Central European Institute of Technology, Masaryk University, Kamenice 5, CZ-62500 Brno, Czechia
| | - Stanislav Komorovsky
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84536 Bratislava, Slovakia
| | - Michal Straka
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, CZ-16610 Prague, Czechia
| | - Martin Kaupp
- Institute of Chemistry, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - Radek Marek
- CEITEC - Central European Institute of Technology, Masaryk University, Kamenice 5, CZ-62500 Brno, Czechia
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, CZ-62500 Brno, Czechia
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6
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Zhang T, Kasper JM, Li X. Localized relativistic two-component methods for ground and excited state calculations. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/bs.arcc.2020.07.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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7
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Lambrecht DS. Generalizing energy decomposition analysis to response properties to inform expedited predictive models. COMPUT THEOR CHEM 2019. [DOI: 10.1016/j.comptc.2018.12.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Chen L, Chen WL, Wang XL, Li YG, Su ZM, Wang EB. Polyoxometalates in dye-sensitized solar cells. Chem Soc Rev 2019; 48:260-284. [PMID: 30451261 DOI: 10.1039/c8cs00559a] [Citation(s) in RCA: 158] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Dye-sensitized solar cells (DSSCs) are the third generation of photovoltaic cells developed by Grätzel and O'Regan. They have the characteristics of low cost, simple manufacturing process, tunable optical properties, and higher photoelectric conversion efficiency (PCE). With an ever increasing energy crisis, there is an urgent need to develop highly efficient, environmentally benign, and energy-saving cell materials. Polyoxometalates (POMs), a kind of molecular inorganic quasi-semiconductor, are promising candidates for use in different parts of DSSCs due to their excellent photosensitivity, redox, and catalytic properties, as well as their relative stability. Following a brief introduction to the development of DSSCs and the potential virtues of POMs in DSSCs, we attempt to make some generalizations about the energy level regulation of POMs that is the underlying theoretical basis for their application in DSSCs, and then we summarize the research progress of POMs in DSSCs in recent years. This is organized in terms of the properties of POMs, namely, electron acceptor, photosensitivity, redox and catalysis, based on the accumulation of our research into POMs over many years. Meanwhile, in view of the fact that the properties of POMs depend primarily on their electronic structural diversity, we keep this point in mind throughout the article with a view to revealing their structure-property relationships. Finally we provide a short summary and remarks on the future outlook. This review may be of interest to synthetic chemists devoted to designing POMs with specific structures, and researchers engaged in the extension of POMs to photoelectric materials.
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Affiliation(s)
- Li Chen
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.
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9
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Li WL, Lu JB, Wang ZL, Hu HS, Li J. Relativity-Induced Bonding Pattern Change in Coinage Metal Dimers M 2 (M = Cu, Ag, Au, Rg). Inorg Chem 2018; 57:5499-5506. [PMID: 29687722 DOI: 10.1021/acs.inorgchem.8b00438] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The periodic table provides a fundamental protocol for qualitatively classifying and predicting chemical properties based on periodicity. While the periodic law of chemical elements had already been rationalized within the framework of the nonrelativistic description of chemistry with quantum mechanics, this law was later known to be affected significantly by relativity. We here report a systematic theoretical study on the chemical bonding pattern change in the coinage metal dimers (Cu2, Ag2, Au2, Rg2) due to the relativistic effect on the superheavy elements. Unlike the lighter congeners basically demonstrating ns- ns bonding character and a 0g+ ground state, Rg2 shows unique 6d-6d bonding induced by strong relativity. Because of relativistic spin-orbit (SO) coupling effect in Rg2, two nearly degenerate SO states, 0g+ and 2u, exist as candidate of the ground state. This relativity-induced change of bonding mechanism gives rise to various unique alteration of chemical properties compared with the lighter dimers, including higher intrinsic bond energy, force constant, and nuclear shielding. Our work thus provides a rather simple but clear-cut example, where the chemical bonding picture is significantly changed by relativistic effect, demonstrating the modified periodic law in heavy-element chemistry.
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Affiliation(s)
- Wan-Lu Li
- Department of Chemistry and Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education , Tsinghua University , Beijing 100084 , China
| | - Jun-Bo Lu
- Department of Chemistry and Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education , Tsinghua University , Beijing 100084 , China
| | - Zhen-Ling Wang
- Department of Chemistry and Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education , Tsinghua University , Beijing 100084 , China
| | - Han-Shi Hu
- Department of Chemistry and Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education , Tsinghua University , Beijing 100084 , China
| | - Jun Li
- Department of Chemistry and Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education , Tsinghua University , Beijing 100084 , China
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10
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Mir JM, Rajak DK, Maurya RC. Bacterial sensitivity and SOD behavior of N-pyrone glucosamine Schiff base Fe(III) complex: conjoint experimental-DFT evaluation. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1374381] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jan Mohammad Mir
- Coordination, Bioinorganic and Computational Chemistry Laboratory, Department of P. G. Studies and Research in Chemistry and Pharmacy, R. D. University, Jabalpur, India
| | - Deepak Kumar Rajak
- Coordination, Bioinorganic and Computational Chemistry Laboratory, Department of P. G. Studies and Research in Chemistry and Pharmacy, R. D. University, Jabalpur, India
| | - Ram Charitra Maurya
- Coordination, Bioinorganic and Computational Chemistry Laboratory, Department of P. G. Studies and Research in Chemistry and Pharmacy, R. D. University, Jabalpur, India
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11
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Tanaka H, Inoue Y, Nakano T, Mori T. Absolute configuration determination through the unique intramolecular excitonic coupling in the circular dichroisms of o,p′-DDT and o,p′-DDD. A combined experimental and theoretical study. Photochem Photobiol Sci 2017; 16:606-610. [DOI: 10.1039/c6pp00438e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Circular dichroisms (CDs) of theo,p′-isomers of 1,1,1-trichloro- and 1,1-dichloro-2,2-bis(chlorophenyl)ethanes (DDTandDDD) were investigated experimentally and theoretically.
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Affiliation(s)
- Hiroki Tanaka
- Department of Applied Chemistry
- Graduate School of Engineering
- Osaka University
- Suita
- Japan
| | - Yoshihisa Inoue
- Department of Applied Chemistry
- Graduate School of Engineering
- Osaka University
- Suita
- Japan
| | - Takeshi Nakano
- Research Center for Environmental Preservation
- Osaka University
- Suita
- Japan
| | - Tadashi Mori
- Department of Applied Chemistry
- Graduate School of Engineering
- Osaka University
- Suita
- Japan
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12
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Singh D, Singh V, Islam N, Gardas RL. Elucidation of molecular interactions between a DBU based protic ionic liquid and organic solvents: thermophysical and computational studies. RSC Adv 2016. [DOI: 10.1039/c5ra18843a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Energy profile of 1,8-diazabicyclo[5.4.0]undec-7-en-8-ium trifluoroacetate [DBUTFA].
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Affiliation(s)
- Dharmendra Singh
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600036
- India
| | | | - Nasarul Islam
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar
- India
| | - Ramesh L. Gardas
- Department of Chemistry
- Indian Institute of Technology Madras
- Chennai 600036
- India
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13
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Bühl M, Reimann C, Pantazis DA, Bredow T, Neese F. Geometries of Third-Row Transition-Metal Complexes from Density-Functional Theory. J Chem Theory Comput 2015; 4:1449-59. [PMID: 26621431 DOI: 10.1021/ct800172j] [Citation(s) in RCA: 358] [Impact Index Per Article: 39.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A set of 41 metal-ligand bond distances in 25 third-row transition-metal complexes, for which precise structural data are known in the gas phase, is used to assess optimized and zero-point averaged geometries obtained from DFT computations with various exchange-correlation functionals and basis sets. For a given functional (except LSDA) Stuttgart-type quasi-relativistic effective core potentials and an all-electron scalar relativistic approach (ZORA) tend to produce very similar geometries. In contrast to the lighter congeners, LSDA affords reasonably accurate geometries of 5d-metal complexes, as it is among the functionals with the lowest mean and standard deviations from experiment. For this set the ranking of some other popular density functionals, ordered according to decreasing standard deviation, is BLYP > VSXC > BP86 ≈ BPW91 ≈ TPSS ≈ B3LYP ≈ PBE > TPSSh > B3PW91 ≈ B3P86 ≈ PBE hybrid. In this case hybrid functionals are superior to their nonhybrid variants. In addition, we have reinvestigated the previous test sets for 3d- (Bühl M.; Kabrede, H. J. Chem. Theory Comput. 2006, 2, 1282-1290) and 4d- (Waller, M. P.; Bühl, M. J. Comput. Chem. 2007, 28, 1531-1537) transition-metal complexes using all-electron scalar relativistic DFT calculations in addition to the published nonrelativistic and ECP results. For this combined test set comprising first-, second-, and third-row metal complexes, B3P86 and PBE hybrid are indicated to perform best. A remarkably consistent standard deviation of around 2 pm in metal-ligand bond distances is achieved over the entire set of d-block elements.
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Affiliation(s)
- Michael Bühl
- School of Chemistry, North Haugh, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K., and Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Christoph Reimann
- School of Chemistry, North Haugh, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K., and Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Dimitrios A Pantazis
- School of Chemistry, North Haugh, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K., and Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Thomas Bredow
- School of Chemistry, North Haugh, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K., and Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
| | - Frank Neese
- School of Chemistry, North Haugh, University of St. Andrews, St. Andrews, Fife KY16 9ST, U.K., and Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany
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14
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Jäger M, Freitag L, González L. Using computational chemistry to design Ru photosensitizers with directional charge transfer. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.03.019] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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15
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Demissie TB, Kostenko N, Komorovsky S, Repisky M, Isaksson J, Bayer A, Ruud K. Experimental and four-component relativistic DFT studies of tungsten carbonyl complexes. J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3476] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Taye B. Demissie
- Centre for Theoretical and Computational Chemistry, Department of Chemistry; University of Tromsø - The Arctic University of Norway; Tromsø, N-9037 Norway
| | - Nataliya Kostenko
- Department of Chemistry; University of Tromsø - The Arctic University of Norway; Tromsø, N-9037 Norway
| | - Stanislav Komorovsky
- Centre for Theoretical and Computational Chemistry, Department of Chemistry; University of Tromsø - The Arctic University of Norway; Tromsø, N-9037 Norway
| | - Michal Repisky
- Centre for Theoretical and Computational Chemistry, Department of Chemistry; University of Tromsø - The Arctic University of Norway; Tromsø, N-9037 Norway
| | - Johan Isaksson
- Department of Chemistry; University of Tromsø - The Arctic University of Norway; Tromsø, N-9037 Norway
| | - Annette Bayer
- Department of Chemistry; University of Tromsø - The Arctic University of Norway; Tromsø, N-9037 Norway
| | - Kenneth Ruud
- Centre for Theoretical and Computational Chemistry, Department of Chemistry; University of Tromsø - The Arctic University of Norway; Tromsø, N-9037 Norway
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16
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Gerber WJ, van Wyk PH, van Niekerk DME, Koch KR. The fundamental flaw of the HSAB principle is revealed by a complete speciation analysis of the [PtCl(6-n)Br(n)](2-) (n = 0-6) system. Phys Chem Chem Phys 2015; 17:5712-24. [PMID: 25624082 DOI: 10.1039/c4cp05294c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Bjerrum's model of step-wise ligand exchange is extended to compute a complete speciation diagram for the [PtCl6-nBrn](2-) (n = 0-6) system including all 17 equilibrium constants concerning the Pt(IV) chlorido-bromido exchange reaction network (HERN). In contrast to what the hard soft acid base (HSAB) principle "predicts", the thermodynamic driving force for the replacement of chloride by bromide in an aqueous matrix, for each individual ligand exchange reaction present in the Pt(IV) HERN, is due to the difference in halide hydration energy and not bonding interactions present in the acid-base complex. A generalized thermodynamic test calculation was developed to illustrate that the HSAB classified class (b) metal cations Ag(+), Au(+), Au(3+), Rh(3+), Cd(2+), Pt(2+), Pt(4+), Fe(3+), Cd(2+), Sn(2+) and Zn(2+) all form thermodynamically stable halido complexes in the order F(-) ≫ Cl(-) > Br(-) > I(-) irrespective of the sample matrix. The bonding interactions in the acid-base complex, e.g. ionic-covalent σ-bonding, Π-bonding and electron correlation effects, play no actual role in the classification of these metal cations using the HSAB principle. Instead, it turns out that the hydration/solvation energy of halides is the reason why metal cations are categorized into two classes using the HSAB principle which highlights the fundamental flaw of the HSAB principle.
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Affiliation(s)
- W J Gerber
- Research Group of PGM Chemistry, Department of Chemistry and Polymer Science, Stellenbosch University, Private Bag XI, Stellenbosch 7602, Western Cape, South Africa.
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Amini M, Arab A, Derakhshandeh PG, Bagherzadeh M, Ellern A, Woo LK. A novel iron complex containing an N,O-type bidentate oxazoline ligand: Synthesis, X-ray studies, DFT calculations and catalytic activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 133:432-438. [PMID: 24973783 DOI: 10.1016/j.saa.2014.06.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 05/20/2014] [Accepted: 06/03/2014] [Indexed: 06/03/2023]
Abstract
A five-coordinated Fe(III) complex with the distorted trigonal bipyramidal configuration was synthesized by reactions of FeCl3⋅6H2O and 2-(2'-hydroxyphenyl)oxazoline (Hphox) as a bidentate ON donor oxazoline ligand. Complex [Fe(phox)2Cl] was fully characterized, including by single-crystal X-ray structure analysis. DFT calculations were accompanied with experimental results in order to obtain a deeper insight into the electronic structure and vibrational normal modes of complex. Oxidation of sulfides to sulfoxides in one-step was conducted by this complex as catalyst using urea hydrogen peroxide (UHP) in mixture of CH2Cl2/CH3OH (1:1) under air at room temperature. The results show that using this system in oxidation of sulfides, sulfoxides are obtained as the main products, together with variable amounts of sulfones (≤13%), depending on the nature of the substrate.
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Affiliation(s)
- Mojtaba Amini
- Department of Chemistry, Faculty of Science, University of Maragheh, P.O. Box 55181-83111, Maragheh, Iran.
| | - Ali Arab
- Department of Chemistry, Semnan University, P.O. Box 35351-19111, Semnan, Iran.
| | | | - Mojtaba Bagherzadeh
- Chemistry Department, Sharif University of Technology, P.O. Box 11155-3615, Tehran, Iran.
| | - Arkady Ellern
- Chemistry Department, Iowa State University, Ames, IA 50011-3111, USA
| | - L Keith Woo
- Chemistry Department, Iowa State University, Ames, IA 50011-3111, USA
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Elijošiutė E, Eicher-Lorka O, Griškonis E, Kuodis Z, Jankūnaitė D, Denafas G. Spectroscopic and structural investigations of iron(III) isothiocyanates. A comparative theoretical and experimental study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 129:43-51. [PMID: 24721282 DOI: 10.1016/j.saa.2014.02.190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 02/24/2014] [Accepted: 02/25/2014] [Indexed: 06/03/2023]
Abstract
A combined experimental and theoretical study on the molecular structure and vibrational spectra of [Fe(NCS)](2+) complex in the aqueous solution at the pH∼2 ± 0.1 have been performed. Experimental Raman spectra of the iron(III) isothiocyanate with higher coordination number in the acidic aqueous solution have been analyzed. Molecular modeling of the iron(III) monoisothiocyanate complex was accomplished by the density functional theory (DFT) method using B3LYP and PBE1PBE functionals. Theoretical vibrational spectra of the iron(III) monoisothiocyanate were interpreted by means of the potential energy distributions (PEDs). The influence of different solvation models and position of SO4(2)(-) ligand vs. NCS(-) ligand upon its geometry and vibrational frequencies have been evaluated. The effect of H2O/D2O isotopic substitution on the experimental and calculated Raman spectra of iron(III) isothiocyanates has been examined. Procedures of Raman spectra subtraction have been applied for the extractions of weak and/or obscured Raman signals. As a result, the presence of bound SO4(2)(-) ion and water molecules in the first coordination sphere in the acidic aqueous iron(III) isothiocyanate solution was confirmed. The vibrational assignments for the investigated iron(III) isothiocyanates were proposed here for the first time.
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Affiliation(s)
- Erika Elijošiutė
- Department of Environmental Technology, Kaunas University of Technology, Radvilėnų av. 19, LT-50254 Kaunas, Lithuania.
| | - Olegas Eicher-Lorka
- Center for Physical Sciences and Technology, Savanorių av. 231, LT-02300 Vilnius, Lithuania.
| | - Egidijus Griškonis
- Department of Physical and Inorganic Chemistry, Kaunas University of Technology, Radvilėnų av. 19, LT-50254 Kaunas, Lithuania
| | - Zenonas Kuodis
- Center for Physical Sciences and Technology, Savanorių av. 231, LT-02300 Vilnius, Lithuania
| | - Dalia Jankūnaitė
- Department of Environmental Technology, Kaunas University of Technology, Radvilėnų av. 19, LT-50254 Kaunas, Lithuania
| | - Gintaras Denafas
- Department of Environmental Technology, Kaunas University of Technology, Radvilėnų av. 19, LT-50254 Kaunas, Lithuania
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21
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Uehara K, Miyachi T, Nakajima T, Mizuno N. Effects of Heteroatoms on Electronic States of Divanadium-Substituted γ-Keggin-type Polyoxometalates. Inorg Chem 2014; 53:3907-18. [DOI: 10.1021/ic5005209] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kazuhiro Uehara
- Department of Applied Chemistry, School
of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takuya Miyachi
- Department of Applied Chemistry, School
of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takahito Nakajima
- RIKEN Advanced Institute for Computational Science, Computational Molecular Science
Research Team, 7-1-26,
Minatojima-minami-machi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan
| | - Noritaka Mizuno
- Department of Applied Chemistry, School
of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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22
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Peng D, Middendorf N, Weigend F, Reiher M. An efficient implementation of two-component relativistic exact-decoupling methods for large molecules. J Chem Phys 2013; 138:184105. [PMID: 23676027 DOI: 10.1063/1.4803693] [Citation(s) in RCA: 141] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
We present an efficient algorithm for one- and two-component relativistic exact-decoupling calculations. Spin-orbit coupling is thus taken into account for the evaluation of relativistically transformed (one-electron) Hamiltonian. As the relativistic decoupling transformation has to be evaluated with primitive functions, the construction of the relativistic one-electron Hamiltonian becomes the bottleneck of the whole calculation for large molecules. For the established exact-decoupling protocols, a minimal matrix operation count is established and discussed in detail. Furthermore, we apply our recently developed local DLU scheme [D. Peng and M. Reiher, J. Chem. Phys. 136, 244108 (2012)] to accelerate this step. With our new implementation two-component relativistic density functional calculations can be performed invoking the resolution-of-identity density-fitting approximation and (Abelian as well as non-Abelian) point group symmetry to accelerate both the exact-decoupling and the two-electron part. The capability of our implementation is illustrated at the example of silver clusters with up to 309 atoms, for which the cohesive energy is calculated and extrapolated to the bulk.
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Affiliation(s)
- Daoling Peng
- ETH Zurich, Laboratorium für Physikalische Chemie, Wolfgang-Pauli-Str. 10, CH-8093 Zurich, Switzerland
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23
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Amini M, Arab A, Soleyman R, Ellern A, Woo LK. Synthesis, X-ray structure, DFT studies, and catalytic activity of a vanadium(V) complex containing a tridentate Schiff base. J COORD CHEM 2013. [DOI: 10.1080/00958972.2013.851789] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Mojtaba Amini
- Department of Chemistry, Faculty of Science, University of Maragheh, Maragheh, Iran
| | - Ali Arab
- Department of Chemistry, Semnan University, Semnan, Iran
| | - Rouhollah Soleyman
- Polymer Science and Technology Division, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
| | - Arkady Ellern
- Chemistry Department, Iowa State University, Ames, IA, USA
| | - L. Keith Woo
- Chemistry Department, Iowa State University, Ames, IA, USA
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24
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Sang YM, Yan LK, Ma NN, Wang JP, Su ZM. TDDFT Studies on the Determination of the Absolute Configurations and Chiroptical Properties of Strandberg-Type Polyoxometalates. J Phys Chem A 2013; 117:2492-8. [DOI: 10.1021/jp400506z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Yuan-Mei Sang
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, P. R.
China
| | - Li-Kai Yan
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, P. R.
China
| | - Na-Na Ma
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, P. R.
China
| | - Jian-Ping Wang
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, P. R.
China
| | - Zhong-Min Su
- Institute of Functional Material Chemistry, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, P. R.
China
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25
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Hancock RD, Bartolotti LJ. A DFT analysis of the effect of chelate ring size on metal ion selectivity in complexes of polyamine ligands. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.09.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Sato H, Mori Y, Yamagishi A. Conformational change of a chiral Schiff base Ni(ii) complex with a binaphthyl moiety: application of vibrational circular dichroism spectroscopy. Dalton Trans 2013; 42:6873-8. [DOI: 10.1039/c3dt00112a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Jaszuński M, Antušek A, Garbacz P, Jackowski K, Makulski W, Wilczek M. The determination of accurate nuclear magnetic dipole moments and direct measurement of NMR shielding constants. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2012; 67:49-63. [PMID: 23101589 DOI: 10.1016/j.pnmrs.2012.03.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Accepted: 03/08/2012] [Indexed: 06/01/2023]
Affiliation(s)
- Michał Jaszuński
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44, 01-224 Warsaw, Poland.
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28
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Wang JP, Yan LK, Yang GC, Guan W, Su ZM. TDDFT studies on the structures and ECD spectra of chiral bisarylimidos bearing different lengths of o-alkoxy chain-substituted polyoxomolybdates. J Mol Graph Model 2012; 35:49-56. [DOI: 10.1016/j.jmgm.2011.12.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2011] [Revised: 12/26/2011] [Accepted: 12/28/2011] [Indexed: 10/14/2022]
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30
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Theoretical study of the four isomers of [Siw11o39]8−: Structure, stability and physical properties. CR CHIM 2012. [DOI: 10.1016/j.crci.2011.09.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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31
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Helgaker T, Coriani S, Jørgensen P, Kristensen K, Olsen J, Ruud K. Recent Advances in Wave Function-Based Methods of Molecular-Property Calculations. Chem Rev 2012; 112:543-631. [DOI: 10.1021/cr2002239] [Citation(s) in RCA: 463] [Impact Index Per Article: 38.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Trygve Helgaker
- Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Oslo, P.O. Box 1033 Blindern, N-0315 Oslo, Norway
| | - Sonia Coriani
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, Via Giorgieri 1, I-34127 Trieste, Italy
| | - Poul Jørgensen
- Lundbeck Center for Theoretical Chemistry, Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
| | - Kasper Kristensen
- Lundbeck Center for Theoretical Chemistry, Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
| | - Jeppe Olsen
- Lundbeck Center for Theoretical Chemistry, Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
| | - Kenneth Ruud
- Centre for Theoretical and Computational Chemistry, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway
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32
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Rudolph M, Autschbach J. Performance of Conventional and Range-Separated Hybrid Density Functionals in Calculations of Electronic Circular Dichroism Spectra of Transition Metal Complexes. J Phys Chem A 2011; 115:14677-86. [DOI: 10.1021/jp2093725] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Mark Rudolph
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
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33
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Theoretical study on vibrational circular dichroism spectra of tris(acetylacetonato)metal(III) complexes: Anharmonic effects and low-lying excited states. J Chem Phys 2011; 135:084506. [DOI: 10.1063/1.3624605] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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34
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Le Guennic B, Autschbach J. [Pt@Pb12]2– — A challenging system for relativistic density functional theory calculations of 195Pt and 207Pb NMR parameters. CAN J CHEM 2011. [DOI: 10.1139/v11-054] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We report computations of NMR chemical shifts and indirect spin-spin coupling constants (J couplings) for the [Pt@Pb12]2– “superatom”. The system is strongly influenced by relativistic effects. The Pt–Pb coupling constant is predicted to be negative, with its magnitude being in reasonable agreement with experiment. Pt and Pb chemical shifts also agree reasonably well with experiment. The Pb shielding tensor is strongly anisotropic, with a large deshielding principal component dominated by magnetic coupling between frontier orbitals of the cluster that resemble atomic g orbitals. The NMR parameters are sensitive to approximations made in the computations and require the inclusion of spin-orbit coupling in the theoretical model to achieve reliable results. Computing the NMR parameters of the compact [Pt@Pb12]2– system with its many electrons proves to be a challenging test case for relativistic density functional methods.
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Affiliation(s)
- Boris Le Guennic
- Université de Lyon, Laboratoire de Chimie, Ecole Normale Supérieure de Lyon, CNRS, 46 allée d’Italie, F-69364 Lyon, France
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
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35
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Reiher M. Relativistic Douglas–Kroll–Hess theory. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2011. [DOI: 10.1002/wcms.67] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Markus Reiher
- Laboratorium für Physikalische Chemie, ETH Zurich, Zurich, Switzerland
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36
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Pomogaev V, Pomogaeva A, Avramov P, Jalkanen KJ, Kachin S. Thermo-dynamical contours of electronic-vibrational spectra simulated using the statistical quantum–mechanical methods. Theor Chem Acc 2011. [DOI: 10.1007/s00214-011-0936-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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37
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Burger MR, Kramer J, Chermette H, Koch KR. A comparison of experimental and DFT calculations of ¹⁹⁵Pt NMR shielding trends for [PtX(n)Y(6-n)](2-) (X, Y = Cl, Br, F and I) anions. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2010; 48 Suppl 1:S38-S47. [PMID: 21104761 DOI: 10.1002/mrc.2607] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A comparison between experimental and calculated gas-phase as well as the conductor-like screening model DFT (195)Pt chemical shifts of a series of octahedral [PtX(6-n)Y(n)](2-) complexes for X = Cl, Br, F, I was carried out to assess the accuracy of computed NMR shielding and to gain insight into the dominant σ(dia), σ(para) and σ(SO) shielding contributions. The discrepancies between the experimental and the DFT-calculated (195)Pt chemical shifts vary for these complexes as a function of the coordinated halide ions, the largest being obtained for the fluorido-chlorido and fluorido-bromido complexes, while negligible discrepancies are found for the [PtCl(6-n)Br(n)](2-) series; the discrepancies are somewhat larger where a significant deviation from the ideal octahedral symmetry such as for the geometric cis/trans or fac/mer isomers of [PtF(6-n)Cl(n)](2-) and [PtF(6-n)Br(n)](2-) may be expected. The discrepancies generally increase in the order [PtCl(6-n)Br(n)](2-) < [PtBr(6-n)I(n)](2-) < [PtCl(6-n)I(n)](2-) < [PtF(6-n)Br(n)](2-) ≈ [PtF(6-n)Cl(n)](2-), and show a striking correlation with the increase in electronegativity difference Δχ between the two halide ligands (X(-) and Y(-)) bound to Pt(IV) for these anions: 0.09 < 0.52 < 0.63 < 1.36 ≈ 1.27, respectively. The computed (195)Pt sensitivity to Pt-X bond displacement, ∂(δ(195)Pt)/∂(ΔPt-X), of these complexes is very large and depends on the halide ion, decreasing from 24 800, 18 300, 15 700 to 12 000 ppm/Å for [PtF(6)](2-), [PtCl(6)](2-), [PtBr(6)](2-) and [PtI(6)](2-), respectively.
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Affiliation(s)
- Marga R Burger
- Department of Chemistry and Polymer Science, University of Stellenbosch, Matieland 7602, South Africa
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38
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Zheng S, Autschbach J. Modeling of heavy-atom-ligand NMR spin-spin coupling in solution: molecular dynamics study and natural bond orbital analysis of Hg-C coupling constants. Chemistry 2010; 17:161-73. [PMID: 21207613 DOI: 10.1002/chem.201001343] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Indexed: 11/11/2022]
Abstract
Ab initio molecular dynamics (MD) and relativistic density functional NMR methods were applied to calculate the one-bond Hg-C NMR indirect nuclear spin-spin coupling constants (J) of [Hg(CN)(2) ] and [CH(3) HgCl] in solution. The MD averages were obtained as J((199) Hg-(13) C)=3200 and 1575 Hz, respectively. The experimental Hg-C spin-spin coupling constants of [Hg(CN)(2) ] in methanol and [CH(3) HgCl] in DMSO are 3143 and 1674 Hz, respectively. To deal with solvent effects in the calculations, finite "droplet" models of the two systems were set up. Solvent effects in both systems lead to a strong increase of the Hg-C coupling constant. From a relativistic natural localized molecular orbital (NLMO) analysis, it was found that the degree of delocalization of the Hg 5d(σ) nonbonding orbital and of the HgC bonding orbital between the two coupled atoms, the nature of the trans Hg-C/Cl bonding orbital, and the s character of these orbitals, exhibit trends upon solvation of the complexes that, when combined, lead to the strong increase of J(Hg-C).
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Affiliation(s)
- Shaohui Zheng
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
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39
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Efremenko I, Poverenov E, Martin JML, Milstein D. DFT Study of the Structure and Reactivity of the Terminal Pt(IV)-Oxo Complex Bearing No Electron-Withdrawing Ligands. J Am Chem Soc 2010; 132:14886-900. [DOI: 10.1021/ja105197x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Irena Efremenko
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76000, Israel
| | - Elena Poverenov
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76000, Israel
| | - Jan M. L. Martin
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76000, Israel
| | - David Milstein
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot 76000, Israel
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40
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Demir S, Yolcu Z, Andaç Ö, Büyükgüngör O, Yazıcılar TK. Electronic structure modeling of dinuclear copper(II)-methacrylic acid complex by density functional theory. J Mol Model 2010; 16:1509-18. [DOI: 10.1007/s00894-010-0660-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2009] [Accepted: 01/09/2010] [Indexed: 11/28/2022]
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41
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Relativistic Effects on Magnetic Resonance Parameters and Other Properties of Inorganic Molecules and Metal Complexes. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/978-1-4020-9975-5_12] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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42
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Bagno A, Bini R. NMR Spectra of Terminal Oxo Gold and Platinum Complexes: Relativistic DFT Predictions. Angew Chem Int Ed Engl 2010; 49:1083-6. [DOI: 10.1002/anie.200905507] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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43
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Vilà-Nadal L, Sarasa J, Rodríguez-Fortea A, Igual J, Kazansky L, Poblet J. Towards the Accurate Calculation of183W NMR Chemical Shifts in Polyoxometalates: The Relevance of the Structure. Chem Asian J 2010; 5:97-104. [DOI: 10.1002/asia.200900263] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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45
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Bagno A, Bini R. NMR Spectra of Terminal Oxo Gold and Platinum Complexes: Relativistic DFT Predictions. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200905507] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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46
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Moncho S, Autschbach J. Relativistic Zeroth-Order Regular Approximation Combined with Nonhybrid and Hybrid Density Functional Theory: Performance for NMR Indirect Nuclear Spin−Spin Coupling in Heavy Metal Compounds. J Chem Theory Comput 2009; 6:223-34. [DOI: 10.1021/ct900535d] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Salvador Moncho
- Departament de Química, Universitat Autonoma de Barcelona, 08193 Cerdanyola del Vallés, Spain
| | - Jochen Autschbach
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000
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47
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Harris KJ, Bryce DL, Wasylishen RE. NMR line shapes from AB spin systems in solids — The role of antisymmetric spin–spin coupling. CAN J CHEM 2009. [DOI: 10.1139/v09-089] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
NMR parameters such as indirect nuclear spin–spin coupling (J), nuclear magnetic shielding (σ), direct dipolar coupling (D), and electric field gradient (V) are properly described by second-rank tensors. Each may be decomposed into isotropic, symmetric, and antisymmetric components; the number of these three components which may be nonzero is a distinguishing attribute of each interaction tensor. The rank-1 antisymmetric portion of J (Janti) holds the distinction of remaining the only nonzero part of these fundamental NMR interaction tensors which has never been observed experimentally. Accordingly, effects from Janti are usually ignored, but it is important to consider when this is valid. An experimental strategy for observing Janti in powdered samples of tightly coupled homonuclear spin pairs, based on ideas originally presented by Andrew and Farnell ( Mol. Phys. 1968, 15, 157 ), is described. The theory of Andrew and Farnell is extended to powder samples, and methods for analyzing NMR spectra from powdered samples are presented. It is found that, in certain rare cases, Janti has the potential to affect the NMR line shapes from AB spin systems, but that even in these systems, the most intense features of the spectra are not affected and may be analyzed independently of Janti. Furthermore, Janti will only have an observable effect on the NMR spectra when its magnitude is comparable with that of Jiso and with the difference in chemical shifts (in Hz) between the two sites. Finally, the first experimental attempts to measure Janti are reported, and experimental proof that no elements of Janti(119Sn,119Sn) in hexa(p-tolyl)ditin are larger than 2900 Hz is given. The benefits of modern double-quantum filtering NMR pulse sequences in isolating effects from Janti are also illustrated.
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Affiliation(s)
| | - David L. Bryce
- Department of Chemistry, University of Alberta, Edmonton, AB T6G 2G2, Canada
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48
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Autschbach J. Magnitude of Finite-Nucleus-Size Effects in Relativistic Density Functional Computations of Indirect NMR Nuclear Spin-Spin Coupling Constants. Chemphyschem 2009; 10:2274-83. [DOI: 10.1002/cphc.200900271] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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49
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Krykunov M, Ziegler T, van Lenthe E. Implementation of a Hybrid DFT Method for Calculating NMR Shieldings Using Slater-Type Orbitals with Spin−Orbital Coupling Included. Applications to 187Os, 195Pt, and 13C in Heavy-Metal Complexes. J Phys Chem A 2009; 113:11495-500. [DOI: 10.1021/jp901991s] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mykhaylo Krykunov
- Department of Chemistry, University of Calgary, Calgary T2N 1N4, Alberta, Canada, and Afdeling Theoretische Chemie, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Tom Ziegler
- Department of Chemistry, University of Calgary, Calgary T2N 1N4, Alberta, Canada, and Afdeling Theoretische Chemie, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Erik van Lenthe
- Department of Chemistry, University of Calgary, Calgary T2N 1N4, Alberta, Canada, and Afdeling Theoretische Chemie, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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50
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Mukhopadhyay P, Wipf P, Beratan DN. Optical signatures of molecular dissymmetry: combining theory with experiments to address stereochemical puzzles. Acc Chem Res 2009; 42:809-19. [PMID: 19378940 DOI: 10.1021/ar8002859] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Modern chemistry emerged from the quest to describe the three-dimensional structure of molecules: van't Hoff's tetravalent carbon placed symmetry and dissymmetry at the heart of chemistry. In this Account, we explore how modern theory, synthesis, and spectroscopy can be used in concert to elucidate the symmetry and dissymmetry of molecules and their assemblies. Chiroptical spectroscopy, including optical rotatory dispersion (ORD), electronic circular dichroism (ECD), vibrational circular dichroism (VCD), and Raman optical activity (ROA), measures the response of dissymmetric structures to electromagnetic radiation. This response can in turn reveal the arrangement of atoms in space, but deciphering the molecular information encoded in chiroptical spectra requires an effective theoretical approach. Although important correlations between ECD and molecular stereochemistry have existed for some time, a battery of accurate new theoretical methods that link a much wider range of chiroptical spectroscopies to structure have emerged over the past decade. The promise of this field is considerable: theory and spectroscopy can assist in assigning the relative and absolute configurations of complex products, revealing the structure of noncovalent aggregates, defining metrics for molecular diversity based on polarization response, and designing chirally imprinted nanomaterials. The physical organic chemistry of chirality is fascinating in its own right: defining atomic and group contributions to optical rotation (OR) is now possible. Although the common expectation is that chiroptical response is determined solely by a chiral solute's electronic structure in a given environment, chiral imprinting effects on the surrounding medium and molecular assembly can, in fact, dominate the chiroptical signatures. The theoretical interpretation of chiroptical markers is challenging because the optical properties are subtle, resulting from the strong electric dipole and the weaker electric quadrupole and magnetic dipole perturbations by the electromagnetic field. Moreover, OR arises from a combination of nearly canceling contributions to the electronic response. Indeed, the challenge posed by the chiroptical properties delayed the advent of even qualitatively accurate descriptions for some chiroptical signatures until the past decade when, for example, prediction of the observed sign of experimental OR became accessible to theory. The computation of chiroptical signatures, in close coordination with synthesis and spectroscopy, provides a powerful framework to diagnose and interpret the dissymmetry of chemical structures and molecular assemblies. Chiroptical theory now produces new schemes to elucidate structure, to describe the specific molecular sources of chiroptical signatures, and to assist in our understanding of how dissymmetry is templated and propagated in the condensed phase.
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Affiliation(s)
- Parag Mukhopadhyay
- Departments of Chemistry and Biochemistry, Duke University, Durham, North Carolina 27708
| | - Peter Wipf
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260
| | - David N. Beratan
- Departments of Chemistry and Biochemistry, Duke University, Durham, North Carolina 27708
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