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Hratchian HP, Karton A, Mayhall NJ. Tribute to Krishnan Raghavachari. J Phys Chem A 2024; 128:2523-2525. [PMID: 38571443 DOI: 10.1021/acs.jpca.4c01320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Affiliation(s)
- Hrant P Hratchian
- Department of Chemistry and Biochemistry, University of California, Merced, Merced, California 95340, United States
| | - Amir Karton
- School of Science and Technology, University of New England, Armidale, NSW 2351, Australia
| | - Nicholas J Mayhall
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24060, United States
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2
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Abou Taka A, Corzo HH, Pribram Jones A, Hratchian HP. Good Vibrations: Calculating Excited-State Frequencies Using Ground-State Self-Consistent Field Models. J Chem Theory Comput 2022; 18:7286-7297. [PMID: 36445860 DOI: 10.1021/acs.jctc.2c00672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
The use of Δ-self-consistent field (SCF) approaches for studying excited electronic states has received a renewed interest in recent years. In this work, the use of this scheme for calculating excited-state vibrational frequencies is examined. Results from Δ-SCF calculations for a set of representative molecules are compared with those obtained using configuration interaction with single substitutions (CIS) and time-dependent density functional theory (TD-DFT) methods. The use of an approximate spin purification model is also considered for cases where the excited-state SCF solution is spin-contaminated. The results of this work demonstrate that an SCF-based description of an excited-state potential energy surface can be an accurate and cost-effective alternative to CIS and TD-DFT methods.
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Affiliation(s)
- Ali Abou Taka
- Department of Chemistry and Biochemistry and Center for Chemical Computation and Theory, University of California, Merced, California95343, United States.,Combustion Research Facility, Sandia National Laboratories, Livermore, California94550, United States
| | - Hector H Corzo
- Department of Chemistry and Biochemistry and Center for Chemical Computation and Theory, University of California, Merced, California95343, United States.,National Center for Computational Sciences, Oak Ridge Leadership Computing Facility, Oak Ridge National laboratory, Oak Ridge, Tennessee37831-6012, United States
| | - Aurora Pribram Jones
- Department of Chemistry and Biochemistry and Center for Chemical Computation and Theory, University of California, Merced, California95343, United States
| | - Hrant P Hratchian
- Department of Chemistry and Biochemistry and Center for Chemical Computation and Theory, University of California, Merced, California95343, United States
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3
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Herbert JM, Head-Gordon M, Hratchian HP, Head-Gordon T, Amaro RE, Aspuru-Guzik A, Hoffmann R, Parish CA, Payne CM, Van Voorhis T. Words Matter: On the Debate over Free Speech, Inclusivity, and Academic Excellence. J Phys Chem Lett 2022; 13:7100-7104. [PMID: 35924341 PMCID: PMC9358646 DOI: 10.1021/acs.jpclett.2c02242] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Accepted: 07/25/2022] [Indexed: 06/29/2023]
Affiliation(s)
- John M. Herbert
- Department
of Chemistry and Biochemistry, The Ohio
State University, Columbus, Ohio 43210, United States
| | - Martin Head-Gordon
- Department
of Chemistry, University of California, Berkeley, California 94720 United States
| | - Hrant P. Hratchian
- Department
of Chemistry, University of California, Merced, California 95343 United States
| | - Teresa Head-Gordon
- Department
of Chemistry, University of California, Berkeley, California 94720 United States
| | - Rommie E. Amaro
- Department
of Chemistry and Biochemistry, University
of California, San Diego, California 922093, United States
| | - Alán Aspuru-Guzik
- Department
of Chemistry, University of Toronto, Toronto, Ontario M5G 1Z8, Canada
| | - Roald Hoffmann
- Department
of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York 14850, United
States
| | - Carol A. Parish
- Department
of Chemistry, University of Richmond, Virginia 23173, United States
| | | | - Troy Van Voorhis
- Department
of Chemistry, Massachusetts Institute of
Technology, Cambridge, Massachusetts 02139, United States
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4
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Baker SI, Yaghoubi M, Bidwell SL, Pierce SL, Hratchian HP, Baxter RD. Enhanced Reactivity for Aromatic Bromination via Halogen Bonding with Lactic Acid Derivatives. J Org Chem 2022; 87:8492-8502. [PMID: 35709498 DOI: 10.1021/acs.joc.2c00611] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a new method for regioselective aromatic bromination using lactic acid derivatives as halogen bond acceptors with N-bromosuccinimide (NBS). Several structural analogues of lactic acid affect the efficiency of aromatic brominations, presumably via Lewis acid/base halogen-bonding interactions. Rate comparisons of aromatic brominations demonstrate the reactivity enhancement available via catalytic additives capable of halogen bonding. Computational results demonstrate that Lewis basic additives interact with NBS to increase the electropositive character of bromine prior to electrophilic transfer. An optimized procedure using catalytic mandelic acid under aqueous conditions at room temperature was developed to promote aromatic bromination on a variety of arene substrates with complete regioselectivity.
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Affiliation(s)
- Sarah I Baker
- Department of Chemistry and Biochemistry, University of California, 5200 N. Lake Road, Merced, California 95343, United States
| | - Mahshid Yaghoubi
- Department of Chemistry and Biochemistry, University of California, 5200 N. Lake Road, Merced, California 95343, United States
| | - Samantha L Bidwell
- Department of Chemistry and Biochemistry, University of California, 5200 N. Lake Road, Merced, California 95343, United States
| | - Savannah L Pierce
- Department of Chemistry and Biochemistry, University of California, 5200 N. Lake Road, Merced, California 95343, United States
| | - Hrant P Hratchian
- Department of Chemistry and Biochemistry, University of California, 5200 N. Lake Road, Merced, California 95343, United States
| | - Ryan D Baxter
- Department of Chemistry and Biochemistry, University of California, 5200 N. Lake Road, Merced, California 95343, United States
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5
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Abou Taka A, Lu SY, Gowland D, Zuehlsdorff TJ, Corzo HH, Pribram-Jones A, Shi L, Hratchian HP, Isborn CM. Comparison of Linear Response Theory, Projected Initial Maximum Overlap Method, and Molecular Dynamics-Based Vibronic Spectra: The Case of Methylene Blue. J Chem Theory Comput 2022; 18:3039-3051. [PMID: 35472264 DOI: 10.1021/acs.jctc.1c01127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The simulation of optical spectra is essential to molecular characterization and, in many cases, critical for interpreting experimental spectra. The most common method for simulating vibronic absorption spectra relies on the geometry optimization and computation of normal modes for ground and excited electronic states. In this report, we show that the utilization of such a procedure within an adiabatic linear response (LR) theory framework may lead to state mixings and a breakdown of the Born-Oppenheimer approximation, resulting in a poor description of absorption spectra. In contrast, computing excited states via a self-consistent field method in conjunction with a maximum overlap model produces states that are not subject to such mixings. We show that this latter method produces vibronic spectra much more aligned with vertical gradient and molecular dynamics (MD) trajectory-based approaches. For the methylene blue chromophore, we compare vibronic absorption spectra computed with the following: an adiabatic Hessian approach with LR theory-optimized structures and normal modes, a vertical gradient procedure, the Hessian and normal modes of maximum overlap method-optimized structures, and excitation energy time-correlation functions generated from an MD trajectory. Because of mixing between the bright S1 and dark S2 surfaces near the S1 minimum, computing the adiabatic Hessian with LR theory and time-dependent density functional theory with the B3LYP density functional predicts a large vibronic shoulder for the absorption spectrum that is not present for any of the other methods. Spectral densities are analyzed and we compare the behavior of the key normal mode that in LR theory strongly couples to the optical excitation while showing S1/S2 state mixings. Overall, our study provides a note of caution in computing vibronic spectra using the excited-state adiabatic Hessian of LR theory-optimized structures and also showcases three alternatives that are less sensitive to adiabatic state mixing effects.
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Affiliation(s)
- Ali Abou Taka
- Department of Chemistry and Biochemistry, University of California Merced, Merced, California 95343, United States
| | - Shao-Yu Lu
- Department of Chemistry and Biochemistry, University of California Merced, Merced, California 95343, United States
| | - Duncan Gowland
- Department of Physics, King's College London, London WC2R 2LS, United Kingdom
| | - Tim J Zuehlsdorff
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Hector H Corzo
- Department of Chemistry and Biochemistry, University of California Merced, Merced, California 95343, United States
| | - Aurora Pribram-Jones
- Department of Chemistry and Biochemistry, University of California Merced, Merced, California 95343, United States
| | - Liang Shi
- Department of Chemistry and Biochemistry, University of California Merced, Merced, California 95343, United States
| | - Hrant P Hratchian
- Department of Chemistry and Biochemistry, University of California Merced, Merced, California 95343, United States
| | - Christine M Isborn
- Department of Chemistry and Biochemistry, University of California Merced, Merced, California 95343, United States
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6
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Harb H, Hratchian HP. A Density Functional Theory Investigation of the Reaction of Water with Ce2O-. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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7
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Corzo HH, Abou Taka A, Pribram-Jones A, Hratchian HP. Using projection operators with maximum overlap methods to simplify challenging self-consistent field optimization. J Comput Chem 2021; 43:382-390. [PMID: 34936117 DOI: 10.1002/jcc.26797] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/30/2021] [Accepted: 11/28/2021] [Indexed: 02/04/2023]
Abstract
Maximum overlap methods are effective tools for optimizing challenging ground- and excited-state wave functions using self-consistent field models such as Hartree-Fock and Kohn-Sham density functional theory. Nevertheless, such models have shown significant sensitivity to the user-defined initial guess of the target wave function. In this work, a projection operator framework is defined and used to provide a metric for non-aufbau orbital selection in maximum-overlap-methods. The resulting algorithms, termed the Projection-based Maximum Overlap Method (PMOM) and Projection-based Initial Maximum Overlap Method (PIMOM), are shown to perform exceptionally well when using simple user-defined target solutions based on occupied/virtual molecular orbital permutations. This work also presents a new metric that provides a simple and conceptually convenient measure of agreement between the desired target and the current or final SCF results during a calculation employing a maximum-overlap method.
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Affiliation(s)
- Hector H Corzo
- Department of Chemistry and Biochemistry and Center for Chemical Computation and Theory, University of California, Merced, California, USA
| | - Ali Abou Taka
- Department of Chemistry and Biochemistry and Center for Chemical Computation and Theory, University of California, Merced, California, USA
| | - Aurora Pribram-Jones
- Department of Chemistry and Biochemistry and Center for Chemical Computation and Theory, University of California, Merced, California, USA
| | - Hrant P Hratchian
- Department of Chemistry and Biochemistry and Center for Chemical Computation and Theory, University of California, Merced, California, USA
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8
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Mason JL, Harb H, Abou Taka A, Huizenga CD, Corzo HH, Hratchian HP, Jarrold CC. New Photoelectron-Valence Electron Interactions Evident in the Photoelectron Spectrum of Gd 2O . J Phys Chem A 2021; 125:9892-9903. [PMID: 34730978 DOI: 10.1021/acs.jpca.1c07818] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Evidence of strong photoelectron-valence electron (PEVE) interactions has been observed in the anion photoelectron (PE) spectra of several lanthanide suboxide clusters, which are exceptionally complex from an electronic structure standpoint and are strongly correlated systems. The PE spectrum of Gd2O-, which should have relatively simple electronic structure because of its half-filled 4f subshell, exhibits numerous electronic transitions. The electron affinity determined from the spectrum is 0.26 eV. The intensities of transitions to excited states increase relative to the lower-energy states with lower photon energy, which is consistent with shakeup transitions driven by time-dependent electron-neutral interactions. A group of intense spectral features that lie between electron binding energies of 0.7 and 2.3 eV are assigned to transitions involving detachment of an electron from outer-valence σu and σg orbitals that have large Gd 6s contributions. The spectra show parallel transition manifolds in general, which is consistent with detachment from these orbitals. However, several distinct perpendicular transitions are observed adjacent to several of the vertical transitions. A possible explanation invoking interaction between the ejected electron and the high-spin neutral is proposed. Specifically, the angular momentum of electrons ejected from σu or σg orbitals, which is l = 1, can switch to l = 0, 2 with an associated change in the Ms of the remnant neutral, which is spin-orbit coupling between a free electron and the spin of a neutral.
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Affiliation(s)
- Jarrett L Mason
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Hassan Harb
- Department of Chemistry and Biochemistry, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Ali Abou Taka
- Department of Chemistry and Biochemistry, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Caleb D Huizenga
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Hector H Corzo
- Department of Chemistry and Biochemistry, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Hrant P Hratchian
- Department of Chemistry and Biochemistry, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Caroline Chick Jarrold
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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9
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Huizenga C, Hratchian HP, Jarrold CC. Lanthanide Oxides: From Diatomics to High-Spin, Strongly Correlated Homo- and Heterometallic Clusters. J Phys Chem A 2021; 125:6315-6331. [PMID: 34265204 DOI: 10.1021/acs.jpca.1c04253] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Small lanthanide (Ln) oxide clusters present both experimental and theoretical challenges because of their partially filled, core-like 4f n orbitals, a feature that results in a plethora of close-lying and fundamentally similar electronic states. These clusters provide a bottom-up approach toward understanding the electronic structure of defective or doped bulk material but also can offer a challenge to the theorists to find a method robust enough to capture electronic structure patterns that emerge from within the 4f n (0 < n < 14) series. In this Feature Article, we explore the electronic structures of small lanthanide oxide clusters that deviate from bulk stoichiometry using anion photoelectron spectroscopy and supporting density functional theory calculations. We will describe the evolution of electronic structure with oxidation and how LnxOy- cluster reactivities can be correlated with specific Ln-local orbital occupancies. These strongly correlated systems offer additional insights into how interactions between electrons and electronically complex neutrals can lead to detachment transitions that lie outside of the sudden one-electron detachment approximation generally assumed in anion photoelectron spectroscopy. With a better understanding of how we can control nominally forbidden transitions to sample an array of spin states, we suggest that more in-depth studies on the magnetic states of these systems can be explored. Extending these studies to other Ln-based materials with hidden magnetic phases, along with sequentially ligated single molecule magnets, could advance current understanding of these systems.
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Affiliation(s)
- Caleb Huizenga
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Hrant P Hratchian
- Department of Chemistry and Chemical Biology, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Caroline Chick Jarrold
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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10
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Abstract
Here we report a new chemical reagent for transnitrosation under mild experimental conditions. This new reagent is stable to air and moisture across a broad range of temperatures and is effective for transnitrosation in multiple solvents. Compared with traditional nitrosation methods, our reagent shows high functional group tolerance for substrates that are susceptible to oxidation or reversible transnitrosation. Several challenging nitroso compounds are accessed here for the first time, including 15N isotopologues. X-ray data confirm that two rotational isomers of the reagent are configurationally stable at room temperature, although only one isomer is effective for transnitrosation. Computational analysis describes the energetics of rotamer interconversion, including interesting geometry-dependent hybridization effects.
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Affiliation(s)
- Jordan D Galloway
- Department of Chemistry and Chemical Biology, University of California, Merced, Merced, California 95343, United States
| | - Cristian Sarabia
- Department of Chemistry and Chemical Biology, University of California, Merced, Merced, California 95343, United States
| | - James C Fettinger
- Department of Chemistry, University of California, Davis, Davis, California 95616, United States
| | - Hrant P Hratchian
- Department of Chemistry and Chemical Biology, University of California, Merced, Merced, California 95343, United States
| | - Ryan D Baxter
- Department of Chemistry and Chemical Biology, University of California, Merced, Merced, California 95343, United States
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11
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Affiliation(s)
- Hassan Harb
- Department of Chemistry and Chemical Biology and Center for Chemical Computation and Theory, University of California, Merced, California 95343, USA
| | - Hrant P. Hratchian
- Department of Chemistry and Chemical Biology and Center for Chemical Computation and Theory, University of California, Merced, California 95343, USA
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12
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Mason JL, Harb H, Taka AA, McMahon AJ, Huizenga CD, Corzo H, Hratchian HP, Jarrold CC. Photoelectron Spectra of Gd2O2– and Nonmonotonic Photon-Energy-Dependent Variations in Populations of Close-Lying Neutral States. J Phys Chem A 2021; 125:857-866. [DOI: 10.1021/acs.jpca.0c11002] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jarrett L. Mason
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Hassan Harb
- Department of Chemistry and Chemical Biology, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Ali Abou Taka
- Department of Chemistry and Chemical Biology, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Abbey J. McMahon
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Caleb D. Huizenga
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Hector Corzo
- Department of Chemistry and Chemical Biology, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Hrant P. Hratchian
- Department of Chemistry and Chemical Biology, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Caroline Chick Jarrold
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
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13
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Abou Taka A, Babin MC, Sheng X, DeVine JA, Neumark DM, Hratchian HP. Unveiling the coexistence of cis- and trans-isomers in the hydrolysis of ZrO2: A coupled DFT and high-resolution photoelectron spectroscopy study. J Chem Phys 2020; 153:244308. [DOI: 10.1063/5.0037636] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Affiliation(s)
- Ali Abou Taka
- Department of Chemistry & Chemical Biology, Center for Chemical Computation and Theory, University of California, Merced, California 95343, USA
| | - Mark C. Babin
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Xianghai Sheng
- Department of Chemistry & Chemical Biology, Center for Chemical Computation and Theory, University of California, Merced, California 95343, USA
| | - Jessalyn A. DeVine
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Daniel M. Neumark
- Department of Chemistry, University of California, Berkeley, California 94720, USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Hrant P. Hratchian
- Department of Chemistry & Chemical Biology, Center for Chemical Computation and Theory, University of California, Merced, California 95343, USA
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14
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Sheng X, Thompson LM, Hratchian HP. Assessing the Calculation of Exchange Coupling Constants and Spin Crossover Gaps Using the Approximate Projection Model To Improve Density Functional Calculations. J Chem Theory Comput 2019; 16:154-163. [PMID: 31743016 DOI: 10.1021/acs.jctc.9b00387] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This work evaluates the quality of exchange coupling constant and spin crossover gap calculations using density functional theory corrected by the approximate projection model. Results show that improvements using the approximate projection model range from modest to significant. This study demonstrates that, at least for the class of systems examined here, spin projection generally improves the quality of density functional theory calculations of J-coupling constants and spin crossover gaps. Furthermore, it is shown that spin projection can be important for both geometry optimization and energy evaluations. The approximate projection model provides an affordable and practical approach for effectively correcting spin-contamination errors in such calculations.
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Affiliation(s)
- Xianghai Sheng
- Department of Chemistry and Chemical Biology & Center for Chemical Computation and Theory , University of California , Merced , California 95343 , United States
| | - Lee M Thompson
- Department of Chemistry and Chemical Biology & Center for Chemical Computation and Theory , University of California , Merced , California 95343 , United States.,Department of Chemistry , University of Louisville , Louisville , Kentucky 40292 , United States
| | - Hrant P Hratchian
- Department of Chemistry and Chemical Biology & Center for Chemical Computation and Theory , University of California , Merced , California 95343 , United States
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15
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Mason JL, Harb H, Topolski JE, Hratchian HP, Jarrold CC. Exceptionally Complex Electronic Structures of Lanthanide Oxides and Small Molecules. Acc Chem Res 2019; 52:3265-3273. [PMID: 31702894 DOI: 10.1021/acs.accounts.9b00474] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Lanthanide (Ln) oxide clusters and molecular systems provide a bottom-up look at the electronic structures of the bulk materials because of close parallels in the patterns of Ln 4fN subshell occupancy between the molecular and bulk Ln2O3 size limits. At the same time, these clusters and molecules offer a challenge to the theory community to find appropriate and robust treatments for the 4fN patterns across the Ln series. Anion photoelectron (PE) spectroscopy provides a powerful experimental tool for studying these systems, mapping the energies of the ground and low-lying excited states of the neutral relative to the initial anion state, providing spectroscopic patterns that reflect the Ln 4fN occupancy. In this Account, we review our anion PE spectroscopic and computational studies on a range of small lanthanide molecules and cluster species. The PE spectra of LnO- (Ln = Ce, Pr, Sm, Eu) diatomic molecules show spectroscopic signatures associated with detachment of an electron from what can be described as a diffuse Ln 6s-like orbital. While the spectra of all four diatomics share this common transition, the fine structure in the transition becomes more complex with increasing 4f occupancy. This effect reflects increased coupling between the electrons occupying the corelike 4f and diffuse 6s orbitals with increasing N. Understanding the PE spectra of these diatomics sets the stage for interpreting the spectra of polyatomic molecular and cluster species. In general, the results confirm that the partial 4fN subshell occupancy is largely preserved between molecular and bulk oxides and borides. However, they also suggest that surfaces and edges of bulk materials may support a low-energy, diffuse Ln 6s band, in contrast to bulk interiors, in which the 6s band is destabilized relative to the 5d band. We also identify cases in which the molecular Ln centers have 4fN+1 occupancy rather than bulklike 4fN, which results in weaker Ln-O bonding. Specifically, Sm centers in mixed Ce-Sm oxides or in SmxOy- (y ≤ x) clusters have this higher 4fN+1 occupancy. The PE spectra of these particular species exhibit a striking increase in the relative intensities of excited-state transitions with decreasing photon energy (resulting in lower photoelectron kinetic energy). This is opposite of what is expected on the basis of the threshold laws that govern photodetachment. We relate this phenomenon to strong electron-neutral interactions unique to these complex electronic structures. The time scale of the interaction, which shakes up the electronic configuration of the neutral, increases with decreasing electron momentum. From a computational standpoint, we point out that special care must be taken when considering Ln cluster and molecular systems toward the center of the Ln series (e.g., Sm, Eu), where treatment of electrons explicitly or using an effective core potential can yield conflicting results on competing subshell occupancies. However, despite the complex electronic structures associated with partially filled 4fN subshells, we demonstrate that inexpensive and tractable calculations yield useful qualitative insight into the general electronic structural features.
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Affiliation(s)
- Jarrett L. Mason
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Hassan Harb
- Department of Chemistry and Chemical Biology and Center for Chemical Computation and Theory, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Josey E. Topolski
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Hrant P. Hratchian
- Department of Chemistry and Chemical Biology and Center for Chemical Computation and Theory, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Caroline Chick Jarrold
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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16
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Cai X, Tohti A, Ramirez C, Harb H, Fettinger JC, Hratchian HP, Stokes BJ. Dispersion-Controlled Regioselective Acid-Catalyzed Intramolecular Hydroindolation of cis-Methindolylstyrenes To Access Tetrahydrobenzo[ cd]indoles. Org Lett 2019; 21:1574-1577. [PMID: 30807191 DOI: 10.1021/acs.orglett.9b00043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Readily prepared cis-β-(α',α'-dimethyl)-4'-methindolylstyrenes undergo acid-catalyzed intramolecular hydroindolation to afford tetrahydrobenzo[ cd]indoles. Our experimental and computational investigations suggest that dispersive interactions between the indole and styrene preorganize substrates such that 6-membered ring formation is preferred, apparently via concerted protonation and C-C bond formation. When dispersion is attenuated (by a substituent or heteroatom), regioselectivity erodes and competing oligomerization predominates for cis substrates. Similarly, all trans-configured substrates that we evaluated failed to cyclize efficiently.
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Affiliation(s)
- Xiao Cai
- Department of Chemistry & Chemical Biology , University of California , 5200 North Lake Road , Merced , California 95343 , United States
| | - Anargul Tohti
- Department of Chemistry & Chemical Biology , University of California , 5200 North Lake Road , Merced , California 95343 , United States
| | - Cristian Ramirez
- Department of Chemistry & Chemical Biology , University of California , 5200 North Lake Road , Merced , California 95343 , United States
| | - Hassan Harb
- Department of Chemistry & Chemical Biology , University of California , 5200 North Lake Road , Merced , California 95343 , United States
| | - James C Fettinger
- Department of Chemistry , University of California , One Shields Avenue , Davis , California 95616 , United States
| | - Hrant P Hratchian
- Department of Chemistry & Chemical Biology , University of California , 5200 North Lake Road , Merced , California 95343 , United States
| | - Benjamin J Stokes
- Department of Chemistry & Chemical Biology , University of California , 5200 North Lake Road , Merced , California 95343 , United States
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17
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Hua AM, Bidwell SL, Baker SI, Hratchian HP, Baxter RD. Experimental and Theoretical Evidence for Nitrogen–Fluorine Halogen Bonding in Silver-Initiated Radical Fluorinations. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00623] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alyssa M. Hua
- Department of Chemistry and Chemical Biology, University of California, 5200 N. Lake Road, Merced, California 95343, United States
| | - Samantha L. Bidwell
- Department of Chemistry and Chemical Biology, University of California, 5200 N. Lake Road, Merced, California 95343, United States
| | - Sarah I. Baker
- Department of Chemistry and Chemical Biology, University of California, 5200 N. Lake Road, Merced, California 95343, United States
| | - Hrant P. Hratchian
- Department of Chemistry and Chemical Biology, University of California, 5200 N. Lake Road, Merced, California 95343, United States
| | - Ryan D. Baxter
- Department of Chemistry and Chemical Biology, University of California, 5200 N. Lake Road, Merced, California 95343, United States
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18
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Mason JL, Harb H, Huizenga CD, Ewigleben JC, Topolski JE, Hratchian HP, Jarrold CC. Electronic and Molecular Structures of the CeB6 Monomer. J Phys Chem A 2019; 123:2040-2048. [DOI: 10.1021/acs.jpca.8b12399] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jarrett L. Mason
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Hassan Harb
- Department of Chemistry and Chemical Biology, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Caleb D. Huizenga
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Joshua C. Ewigleben
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Josey E. Topolski
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Hrant P. Hratchian
- Department of Chemistry and Chemical Biology, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Caroline Chick Jarrold
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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19
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Abstract
Density functional theory predicts that lanthanide hydroxides are linear, with the lanthanide-hydroxide bond being characterized as a covalent triple bond.
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Affiliation(s)
- Hassan Harb
- Department of Chemistry & Chemical Biology and the Center for Chemical Computation and Theory
- University of California
- California 95343
- USA
| | - Lee M. Thompson
- Department of Chemistry & Chemical Biology and the Center for Chemical Computation and Theory
- University of California
- California 95343
- USA
| | - Hrant P. Hratchian
- Department of Chemistry & Chemical Biology and the Center for Chemical Computation and Theory
- University of California
- California 95343
- USA
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20
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Mason JL, Harb H, Topolski JE, Hratchian HP, Jarrold CC. A Tale of Two Stabilities: How One Boron Atom Affects a Switch in Bonding Motifs in CeO2Bx– (x = 2, 3) Complexes. J Phys Chem A 2018; 122:9879-9885. [DOI: 10.1021/acs.jpca.8b10446] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jarrett L. Mason
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Hassan Harb
- Department of Chemistry and Chemical Biology, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Josey E. Topolski
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Hrant P. Hratchian
- Department of Chemistry and Chemical Biology, University of California, Merced, 5200 North Lake Road, Merced, California 95343, United States
| | - Caroline Chick Jarrold
- Department of Chemistry, Indiana University, 800 E. Kirkwood Avenue, Bloomington, Indiana 47405, United States
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21
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Topolski JE, Kafader JO, Marrero-Colon V, Iyengar SS, Hratchian HP, Jarrold CC. Exotic electronic structures of SmxCe3−xOy (x = 0-3; y = 2-4) clusters and the effect of high neutral density of low-lying states on photodetachment transition intensities. J Chem Phys 2018; 149:054305. [DOI: 10.1063/1.5043490] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- Josey E. Topolski
- Department of Chemistry, Indiana University, 800 East Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Jared O. Kafader
- Department of Chemistry, Indiana University, 800 East Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Vicmarie Marrero-Colon
- Department of Chemistry, Indiana University, 800 East Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Srinivasan S. Iyengar
- Department of Chemistry, Indiana University, 800 East Kirkwood Ave., Bloomington, Indiana 47405, USA
| | - Hrant P. Hratchian
- Department of Chemistry and Chemical Biology, University of California, Merced, 5200 North Lake Road, Merced, California 95343, USA
| | - Caroline Chick Jarrold
- Department of Chemistry, Indiana University, 800 East Kirkwood Ave., Bloomington, Indiana 47405, USA
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22
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DeVine JA, Abou Taka A, Babin MC, Weichman ML, Hratchian HP, Neumark DM. High-resolution photoelectron spectroscopy of TiO3H2−: Probing the TiO2− + H2O dissociative adduct. J Chem Phys 2018; 148:222810. [DOI: 10.1063/1.5018414] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Jessalyn A. DeVine
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Ali Abou Taka
- Chemistry and Chemical Biology, University of California, Merced, California 05343, USA
| | - Mark C. Babin
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Marissa L. Weichman
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Hrant P. Hratchian
- Chemistry and Chemical Biology, University of California, Merced, California 05343, USA
| | - Daniel M. Neumark
- Department of Chemistry, University of California, Berkeley, California 94720, USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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23
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Thompson LM, Jarrold CC, Hratchian HP. Explaining the MoVO4− photoelectron spectrum: Rationalization of geometric and electronic structure. J Chem Phys 2017; 146:104301. [DOI: 10.1063/1.4977418] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Lee M. Thompson
- Chemistry and Chemical Biology, University of California, Merced, California 95343, USA
| | - Caroline C. Jarrold
- Department of Chemistry, Indiana University, Bloomington, Indiana 47405, USA
| | - Hrant P. Hratchian
- Chemistry and Chemical Biology, University of California, Merced, California 95343, USA
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24
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Petrone A, Cimino P, Donati G, Hratchian HP, Frisch MJ, Rega N. On the Driving Force of the Excited-State Proton Shuttle in the Green Fluorescent Protein: A Time-Dependent Density Functional Theory (TD-DFT) Study of the Intrinsic Reaction Path. J Chem Theory Comput 2016; 12:4925-4933. [DOI: 10.1021/acs.jctc.6b00402] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alessio Petrone
- Dipartimento
di Scienze Chimiche, Università di Napoli “Federico II”, Complesso Universitario di M. S. Angelo, via Cintia, I-80126 Napoli, Italy
| | - Paola Cimino
- Dipartimento
di Scienze Farmaceutiche, Università di Salerno, via Ponte
don Melillo, I-84084 Fisciano, SA Italy
| | - Greta Donati
- Dipartimento
di Scienze Chimiche, Università di Napoli “Federico II”, Complesso Universitario di M. S. Angelo, via Cintia, I-80126 Napoli, Italy
| | - Hrant P. Hratchian
- School
of Natural Sciences, University of California, Merced, Merced, California 95343, United States
| | | | - Nadia Rega
- Dipartimento
di Scienze Chimiche, Università di Napoli “Federico II”, Complesso Universitario di M. S. Angelo, via Cintia, I-80126 Napoli, Italy
- Italian Institute
of Technology, IIT@CRIB Center for Advanced Biomaterials for Healthcare, Largo Barsanti e Matteucci, I-80125 Napoli, Italy
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25
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Affiliation(s)
- Lee M. Thompson
- Chemistry and Chemical Biology, University of California, Merced, California 95343, USA
| | - Hassan Harb
- Chemistry and Chemical Biology, University of California, Merced, California 95343, USA
| | - Hrant P. Hratchian
- Chemistry and Chemical Biology, University of California, Merced, California 95343, USA
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26
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Presti D, Labat F, Pedone A, Frisch MJ, Hratchian HP, Ciofini I, Cristina Menziani M, Adamo C. Modeling emission features of salicylidene aniline molecular crystals: A QM/QM’ approach. J Comput Chem 2016; 37:861-70. [DOI: 10.1002/jcc.24282] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 11/03/2015] [Accepted: 11/05/2015] [Indexed: 12/30/2022]
Affiliation(s)
- Davide Presti
- Dipartimento Di Scienze Chimiche e Geologiche; Università di Modena e Reggio-Emilia; via G. Campi 103 Modena I-41125 Italy
| | - Frédéric Labat
- Institut de Recherche de Chimie Paris, CNRS Chimie ParisTech; 11 Rue P. et M. Curie F-75005 Paris France
| | - Alfonso Pedone
- Dipartimento Di Scienze Chimiche e Geologiche; Università di Modena e Reggio-Emilia; via G. Campi 103 Modena I-41125 Italy
| | - Michael J. Frisch
- Gaussian Inc.; 340 Quinnipiac Str., Bldg. 40 Wallingford Connecticut 06492
| | - Hrant P. Hratchian
- Chemistry and Chemical Biology; University of California; Merced California 95343
| | - Ilaria Ciofini
- Institut de Recherche de Chimie Paris, CNRS Chimie ParisTech; 11 Rue P. et M. Curie F-75005 Paris France
| | - Maria Cristina Menziani
- Dipartimento Di Scienze Chimiche e Geologiche; Università di Modena e Reggio-Emilia; via G. Campi 103 Modena I-41125 Italy
| | - Carlo Adamo
- Institut de Recherche de Chimie Paris, CNRS Chimie ParisTech; 11 Rue P. et M. Curie F-75005 Paris France
- Institut Universitaire de France; 103 Boulevard Saint Michel Paris F-75005 France
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27
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Cummings S, Hratchian HP, Reed CA. The Strongest Acid: Protonation of Carbon Dioxide. Angew Chem Int Ed Engl 2015; 55:1382-6. [DOI: 10.1002/anie.201509425] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 11/21/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Steven Cummings
- Center for s and p Block Chemistry, Department of Chemistry University of California Riverside CA 92521 USA
| | - Hrant P. Hratchian
- School of Natural Sciences University of California, Merced Merced CA 95348 USA
| | - Christopher A. Reed
- Center for s and p Block Chemistry, Department of Chemistry University of California Riverside CA 92521 USA
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28
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Affiliation(s)
- Steven Cummings
- Center for s and p Block Chemistry, Department of Chemistry University of California Riverside CA 92521 USA
| | - Hrant P. Hratchian
- School of Natural Sciences University of California, Merced Merced CA 95348 USA
| | - Christopher A. Reed
- Center for s and p Block Chemistry, Department of Chemistry University of California Riverside CA 92521 USA
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29
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Thompson LM, Hratchian HP. Modeling the Photoelectron Spectra of MoNbO2– Accounting for Spin Contamination in Density Functional Theory. J Phys Chem A 2015; 119:8744-51. [DOI: 10.1021/acs.jpca.5b04625] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lee M. Thompson
- Chemistry and Chemical Biology, University of California, Merced, California 95343, United States
| | - Hrant P. Hratchian
- Chemistry and Chemical Biology, University of California, Merced, California 95343, United States
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30
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31
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Presti D, Labat F, Pedone A, Frisch MJ, Hratchian HP, Ciofini I, Menziani MC, Adamo C. Computational Protocol for Modeling Thermochromic Molecular Crystals: Salicylidene Aniline As a Case Study. J Chem Theory Comput 2014; 10:5577-85. [DOI: 10.1021/ct500868s] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Davide Presti
- Dipartimento
di Scienze Chimiche e Geologiche, Università di Modena e Reggio-Emilia, 183 via G. Campi, I-41125 Modena, Modena, Italy
| | - Fréderic Labat
- Institut
de Recherche de Chimie Paris CNRS, Chimie ParisTech, 11 rue P.
et M. Curie, F-75005 Paris 05, France
| | - Alfonso Pedone
- Dipartimento
di Scienze Chimiche e Geologiche, Università di Modena e Reggio-Emilia, 183 via G. Campi, I-41125 Modena, Modena, Italy
| | - Michael J. Frisch
- Gaussian, Inc., 340 Quinnipiac
Street, Building 40, Wallingford, Connecticut 06492, United States
| | - Hrant P. Hratchian
- Chemistry
and Chemical Biology, University of California, Merced, California 95343, United States
| | - Ilaria Ciofini
- Institut
de Recherche de Chimie Paris CNRS, Chimie ParisTech, 11 rue P.
et M. Curie, F-75005 Paris 05, France
| | - Maria Cristina Menziani
- Dipartimento
di Scienze Chimiche e Geologiche, Università di Modena e Reggio-Emilia, 183 via G. Campi, I-41125 Modena, Modena, Italy
| | - Carlo Adamo
- Institut
de Recherche de Chimie Paris CNRS, Chimie ParisTech, 11 rue P.
et M. Curie, F-75005 Paris 05, France
- Institut Universitaire de France, 103 Boulevard Saint Michel, F-75005 Paris, France
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32
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33
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34
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35
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Affiliation(s)
- Hrant P. Hratchian
- Gaussian, Inc., 340 Quinnipiac
Street, Building 40, Wallingford, Connecticut 06492, United States
| | - Elfi Kraka
- Department of Chemistry, Southern
Methodist University, 3215 Daniel Avenue, Dallas, Texas 75275, United
States
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36
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Hratchian HP, Li X. Thirty Years of Geometry Optimization in Quantum Chemistry and Beyond: A Tribute to Berny Schlegel. J Chem Theory Comput 2012; 8:4853-5. [PMID: 26593179 DOI: 10.1021/ct300950r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hrant P Hratchian
- Gaussian, Inc., 340 Quinnipiac Street, Building 40, Wallingford, Connecticut 06492, United States
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
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37
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Hratchian HP. Using Efficient Predictor-Corrector Reaction Path Integrators for Studies Involving Projected Frequencies. J Chem Theory Comput 2012; 8:5013-9. [DOI: 10.1021/ct300407g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hrant P. Hratchian
- Gaussian, Inc., 340
Quinnipiac Street, Building 40,
Wallingford, Connecticut 06492, United States
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38
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Hratchian HP, Krukau AV, Parandekar PV, Frisch MJ, Raghavachari K. Erratum: “QM:QM embedding using electronic densities within an ONIOM framework: Energies and analytic gradients” [J. Chem. Phys. 135, 014105 (2011)]. J Chem Phys 2012. [DOI: 10.1063/1.3673819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Hratchian HP, Krukau AV, Parandekar PV, Frisch MJ, Raghavachari K. QM:QM embedding using electronic densities within an ONIOM framework: Energies and analytic gradients. J Chem Phys 2011; 135:014105. [DOI: 10.1063/1.3603450] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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40
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41
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Hratchian HP, Frisch MJ, Schlegel HB. Steepest descent reaction path integration using a first-order predictor–corrector method. J Chem Phys 2010; 133:224101. [DOI: 10.1063/1.3514202] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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42
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Mayhall NJ, Raghavachari K, Hratchian HP. ONIOM-based QM:QM electronic embedding method using Löwdin atomic charges: Energies and analytic gradients. J Chem Phys 2010; 132:114107. [DOI: 10.1063/1.3315417] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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43
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Labat F, Ciofini I, Hratchian HP, Frisch M, Raghavachari K, Adamo C. First Principles Modeling of Eosin-Loaded ZnO Films: A Step toward the Understanding of Dye-Sensitized Solar Cell Performances. J Am Chem Soc 2009; 131:14290-8. [DOI: 10.1021/ja902833s] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Frédéric Labat
- Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, CNRS UMR-7575, Ecole Nationale Supérieure de Chimie de Paris, 11 rue P. et M. Curie, F-75231 Paris Cedex 05 France, Gaussian, Inc., 340 Quinnipiac Street, Building 40, Wallingford, Connecticut 06492, and Department of Chemistry, Indiana University, Bloomington, Indiana 47405
| | - Ilaria Ciofini
- Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, CNRS UMR-7575, Ecole Nationale Supérieure de Chimie de Paris, 11 rue P. et M. Curie, F-75231 Paris Cedex 05 France, Gaussian, Inc., 340 Quinnipiac Street, Building 40, Wallingford, Connecticut 06492, and Department of Chemistry, Indiana University, Bloomington, Indiana 47405
| | - Hrant P. Hratchian
- Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, CNRS UMR-7575, Ecole Nationale Supérieure de Chimie de Paris, 11 rue P. et M. Curie, F-75231 Paris Cedex 05 France, Gaussian, Inc., 340 Quinnipiac Street, Building 40, Wallingford, Connecticut 06492, and Department of Chemistry, Indiana University, Bloomington, Indiana 47405
| | - Mike Frisch
- Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, CNRS UMR-7575, Ecole Nationale Supérieure de Chimie de Paris, 11 rue P. et M. Curie, F-75231 Paris Cedex 05 France, Gaussian, Inc., 340 Quinnipiac Street, Building 40, Wallingford, Connecticut 06492, and Department of Chemistry, Indiana University, Bloomington, Indiana 47405
| | - Krishnan Raghavachari
- Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, CNRS UMR-7575, Ecole Nationale Supérieure de Chimie de Paris, 11 rue P. et M. Curie, F-75231 Paris Cedex 05 France, Gaussian, Inc., 340 Quinnipiac Street, Building 40, Wallingford, Connecticut 06492, and Department of Chemistry, Indiana University, Bloomington, Indiana 47405
| | - Carlo Adamo
- Laboratoire d’Electrochimie, Chimie des Interfaces et Modélisation pour l’Energie, CNRS UMR-7575, Ecole Nationale Supérieure de Chimie de Paris, 11 rue P. et M. Curie, F-75231 Paris Cedex 05 France, Gaussian, Inc., 340 Quinnipiac Street, Building 40, Wallingford, Connecticut 06492, and Department of Chemistry, Indiana University, Bloomington, Indiana 47405
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44
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Parandekar PV, Hratchian HP, Raghavachari K. Applications and assessment of QM:QM electronic embedding using generalized asymmetric Mulliken atomic charges. J Chem Phys 2008; 129:145101. [DOI: 10.1063/1.2976570] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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45
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Hratchian HP, Parandekar PV, Raghavachari K, Frisch MJ, Vreven T. QM:QM electronic embedding using Mulliken atomic charges: Energies and analytic gradients in an ONIOM framework. J Chem Phys 2008; 128:034107. [DOI: 10.1063/1.2814164] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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46
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Shakya R, Hindo SS, Wu L, Allard MM, Heeg MJ, Hratchian HP, McGarvey BR, da Rocha SRP, Verani CN. Archetypical Modeling and Amphiphilic Behavior of Cobalt(II)-Containing Soft-Materials with Asymmetric Tridentate Ligands. Inorg Chem 2007; 46:9808-18. [DOI: 10.1021/ic7011815] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rajendra Shakya
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, Department of Chemical Engineering, Wayne State University, Detroit, Michigan 48202, Department of Chemistry, Indiana University, Bloomington, Indiana 47405, and Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 1P4, Canada
| | - Sarmad Sahiel Hindo
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, Department of Chemical Engineering, Wayne State University, Detroit, Michigan 48202, Department of Chemistry, Indiana University, Bloomington, Indiana 47405, and Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 1P4, Canada
| | - Libo Wu
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, Department of Chemical Engineering, Wayne State University, Detroit, Michigan 48202, Department of Chemistry, Indiana University, Bloomington, Indiana 47405, and Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 1P4, Canada
| | - Marco M. Allard
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, Department of Chemical Engineering, Wayne State University, Detroit, Michigan 48202, Department of Chemistry, Indiana University, Bloomington, Indiana 47405, and Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 1P4, Canada
| | - Mary Jane Heeg
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, Department of Chemical Engineering, Wayne State University, Detroit, Michigan 48202, Department of Chemistry, Indiana University, Bloomington, Indiana 47405, and Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 1P4, Canada
| | - Hrant P. Hratchian
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, Department of Chemical Engineering, Wayne State University, Detroit, Michigan 48202, Department of Chemistry, Indiana University, Bloomington, Indiana 47405, and Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 1P4, Canada
| | - Bruce R. McGarvey
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, Department of Chemical Engineering, Wayne State University, Detroit, Michigan 48202, Department of Chemistry, Indiana University, Bloomington, Indiana 47405, and Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 1P4, Canada
| | - Sandro R. P. da Rocha
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, Department of Chemical Engineering, Wayne State University, Detroit, Michigan 48202, Department of Chemistry, Indiana University, Bloomington, Indiana 47405, and Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 1P4, Canada
| | - Cláudio N. Verani
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, Department of Chemical Engineering, Wayne State University, Detroit, Michigan 48202, Department of Chemistry, Indiana University, Bloomington, Indiana 47405, and Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON N9B 1P4, Canada
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Herbert HE, Halls MD, Hratchian HP, Raghavachari K. Hydrogen-bonding interactions in peptide nucleic acid and deoxyribonucleic acid: a comparative study. J Phys Chem B 2007; 110:3336-43. [PMID: 16494348 DOI: 10.1021/jp055865j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Peptide nucleic acid (PNA) is a synthetic analogue of deoxyribonucleic acid (DNA) capable of tightly binding to itself and DNA with high specificity. Using hybrid density functional methods, hydrogen-bond (H-bond) strengths have been evaluated for isolated Watson-Crick base pairs, PNA base pairs, and charged as well as neutral DNA base pairs. Heterogeneous base pairs of PNA with charged and neutral DNA have also been investigated. The competing effects of short-range H-bonding and long-range Coulombic repulsions in charged DNA base pairs have been analyzed. Polarizable continuum models have been employed to evaluate solvation effects on the binding energies.
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Abstract
Central to the theoretical description of a chemical reaction is the reaction pathway. The intrinsic reaction coordinate is defined as the steepest descent path in mass weighted Cartesian coordinates that connects the transition state to reactants and products. In this work, a new integrator for the steepest descent pathway is presented. This method is a Hessian based predictor-corrector algorithm that affords pathways comparable to our previous fourth order method at the cost of a second order approach. The proposed integrator is tested on an analytic surface, four moderately sized chemical reactions, and one larger organometallic system.
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Affiliation(s)
- Hrant P Hratchian
- Department of Chemistry and Institute for Scientific Computing, Wayne State University, Detroit, MI 48202, USA
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Lanznaster M, Hratchian HP, Heeg MJ, Hryhorczuk LM, McGarvey BR, Schlegel HB, Verani CN. Structural and Electronic Behavior of Unprecedented Five-Coordinate Iron(III) and Gallium(III) Complexes with a New Phenol-Rich Electroactive Ligand. Inorg Chem 2006; 45:955-7. [PMID: 16441098 DOI: 10.1021/ic050809i] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new asymmetric pentadentate ligand was designed to impose low symmetry to trivalent ions. Five-coordinate Fe3+ and Ga3+ complexes were investigated by crystallographic, electrochemical, and electron paramagnetic resonance methods showing enhanced redox reversibility. Calculations were performed to account for the observed trends.
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Affiliation(s)
- Mauricio Lanznaster
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA
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50
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Shakya R, Imbert C, Hratchian HP, Lanznaster M, Heeg MJ, McGarvey BR, Allard M, Schlegel HB, Verani CN. Structural, spectroscopic, and electrochemical behavior of trans-phenolato cobalt(iii) complexes of asymmetric NN′O ligands as archetypes for metallomesogens. Dalton Trans 2006:2517-25. [PMID: 16718335 DOI: 10.1039/b514190g] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In order to understand and predict structural, redox, magnetic, and optical properties of more complex and potentially mesogenic electroactive compounds such as [Co(III)(L(t-BuLC))2]ClO4 (1), five archetypical complexes of general formula [Co(III)(L(RA))2]ClO4, where R = H (2), tert-butyl (3), methoxy (4), nitro (5), and chloro (6), were obtained and studied by means of several spectrometric, spectroscopic, and electrochemical methods. The complexes 2, 4, and 6 were characterized by single-crystal X-ray diffraction, and show the metal center in an approximate D2h symmetry. Experimental results support the fact that the electron donating or withdrawing nature of the phenolate-appended substituents changes dramatically the redox and spectroscopic properties of these compounds. The 3d6 electronic configuration of the metal ion dominates the overall geometry adopted by these compounds with the phenolate rings occupying trans positions to one another. Formation of phenoxyl radicals has been observed for 1, 3, and 6, but irreversible ligand oxidation takes place upon bulk electrolysis. These data were compared to detailed B3LYP/6-31G (d)-level computational calculations and have been used to account for the results observed. A comparison between compound 1 and archetype 3, validates the approach of using archetypical models to study metal-containing soft materials.
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Affiliation(s)
- Rajendra Shakya
- Department of Chemistry, Wayne State University, 5101 Cass Ave., Detroit, MI 48202, USA
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