1
|
Pedersen J, Rasmussen MH, Mikkelsen KV. Redfield Propagation of Photoinduced Electron Transfer Reactions in Vacuum and Solution. J Chem Theory Comput 2022; 18:7052-7072. [PMID: 36413807 DOI: 10.1021/acs.jctc.2c00538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Dynamical simulations of ultrafast electron transfer reactions are of utmost interest. To allow for energy dissipation directly into an external surrounding environment, a solvent coupling model has been deduced, implemented, and utilized to describe the photoinduced electron transfer dynamics within a model triad system herein. The model is based on Redfield theory, and the environment is represented by harmonic oscillators filled with bosonic quanta. To imitate real solvents, the oscillators have been equipped with frequencies and polarization lifetimes characteristic of the corresponding solvent. The population was found to transfer through the energetically lowest electron transfer route regardless of the medium. The condensed population transfer dynamics were observed to be highly dependent on the solvent parameters. In particular, an increase in the solvent coupling entailed a detainment in the population transfer from the initially prepared diabatic state and a promotion in the population transfer through the other electron transfer route. Two explanations based on the diagonal and off-diagonal matrix elements of the Kohn-Sham Fock matrix, respectively, have been provided. The lifetime of the populated partially charge-separated state was prolonged with increasing solvent polarity, and it was explained in terms of attractive interactions between the solvent's dipole moments and the fragments' charges. The high-frequency vibrational fine-structure in the correlation function was demonstrated to be important for the transfer dynamics, and the importance of dephasing effects in polar solvents was verified and precised to concern the optical polarization of the solvents.
Collapse
Affiliation(s)
- Jacob Pedersen
- Department of Chemistry, University of Copenhagen, Copenhagen, DK-2100, Denmark
| | - Maria H Rasmussen
- Department of Chemistry, University of Copenhagen, Copenhagen, DK-2100, Denmark
| | - Kurt V Mikkelsen
- Department of Chemistry, University of Copenhagen, Copenhagen, DK-2100, Denmark
| |
Collapse
|
2
|
Hillers-Bendtsen AE, Quant M, Moth-Poulsen K, Mikkelsen KV. Investigation of the Structural and Thermochemical Properties of [2.2.2]-Bicyclooctadiene Photoswitches. J Phys Chem A 2021; 125:10330-10339. [PMID: 34809434 DOI: 10.1021/acs.jpca.1c07737] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Molecular photoswitches can under certain conditions be used to store solar energy in the so-called molecular solar thermal storage systems, which is an interesting technology for renewable energy solutions. The current investigations focus on the performance of seven different density functional theory (DFT) methods (B3LYP, CAM-B3LYP, PBE0, M06-2X, ωB97X-D, B2PLYP, and PBE0DH) when predicting geometries and thermochemical properties of the [2.2.2]-bicyclooctadiene (BOD) photoswitch. We find that all of the investigated DFT methods provide geometries that are in good agreement with those obtained using coupled cluster singles and doubles (CCSD) calculations. The dependence on the employed basis set is not large when predicting geometries. With respect to the thermochemical properties, we find that the M06-2X, CAM-B3LYP, PBE0, and ωB97X-D functionals all predict thermochemical properties that are in good agreement with the results of the CCSD, the CCSD including perturbative triples (CCSD(T)), and the explicitly correlated CCSD-F12 and CCSD(T)-F12 models. Lastly, for energy calculations, we tested the newly developed fourth-order cluster perturbation theory singles and doubles CPS(D-4) model, which in this study provides energy differences that are of CCSD and sometimes also CCSD(T) quality at a relatively low cost. We find that the CPS(D-4) model is an excellent choice for further investigation of BOD derivatives because accurate energies can be obtained routinely using this methodology. From the results, we also note that the predicted storage energies and storage energy densities for the BOD photoswitch are very large compared to other molecular solar thermal storage systems and that these systems could be candidates for such applications.
Collapse
Affiliation(s)
| | - Maria Quant
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg 41296, Sweden
| | - Kasper Moth-Poulsen
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg 41296, Sweden.,The Institute of Materials Science of Barcelona, ICMAB-CSIC, Bellaterra, Barcelona 08193, Spain.,Catalan Institution for Research Advanced Studies, ICREA, Pg. Lluis Companys 23, Barcelona 08010, Spain
| | - Kurt V Mikkelsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, Copenhagen Ø 2100, Denmark
| |
Collapse
|
3
|
Yin Q, Chen Y, Zhou M, Jiang X, Wu J, Sun Y. Synthesis and photophysical properties of deuteration of pirfenidone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 204:88-98. [PMID: 29908414 DOI: 10.1016/j.saa.2018.06.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/29/2018] [Accepted: 06/04/2018] [Indexed: 06/08/2023]
Abstract
In order to improve the metabolism of pirfenidone (5-methyl-1-phenylpyridin-2-one, PFD), the methyl-deuterated version of pirfenidone via the substitution of hydrogen (H) at C-5 by its isotope deuterium (D, 5D-PFD) was synthesized and its photophysical properties were investigated. The negative solvatochrom was observed in absorption and fluorescence spectra with increasing solvent polarity, which implied that intermolecular charge transfer (ICT) involved n → π* transition for both of PFD and 5D-PFD. The ground state and excited state dipole moment was calculated as 5.30 D and 3.30 D for PFD, and 3.70 D and 2.18 D for 5D-PFD, respectively, which suggested the more polar nature of PFD in the ground state than that of excited state compared with 5D-PFD. Density functional theory (DFT) results demonstrated a significant propensity of ICT from the electron-donor, methyl and carbonyl group to the amine group as an electron donor. The binding of metal ions with PFD or 5D-PFD induced a red-shift of π → π* transition and blue-shift of n → π* transition, respectively, indicating that the pyridone ring showed more stability upon binding of unoccupied orbital of metal ions with lone-pair electron of oxygen atom and thus prompted the electronic distribution on phenyl unit. Upon addition of metal ions, the aromatic region presented the characteristic upfield shifts, and the resonance contributed by 3-H showed a significant downfield chemical shift/deshielding effect, indicating the deduced resonance of 3-H and the improved electron distribution of phenyl unit. The binding and docking of human serum albumin showed that the affinity of 5D-PFD with HSA was lower than that of PFD, and also 5D-PFD might prefer to present free forms in the blood with better efficacy comparing with PFD. The pharmacokinetic of half-time (T1/2) for oral and i.v. administration of 5D-PFD was found around 19 and 30 min, higher than that of i.v. administration of PFD, 8.6 min, reported by Giri et al. The results of this work suggest that the deuteration enhances the metabolism of PFD significantly with little change of physical-chemical property.
Collapse
Affiliation(s)
- Qiuju Yin
- School of Food Science and Technology·School of Chemical Engineering, Hubei University of Arts and Science, No. 296 Longzhong Road, Xiangyang, Hubei 441053, China
| | - Yujie Chen
- School of Food Science and Technology·School of Chemical Engineering, Hubei University of Arts and Science, No. 296 Longzhong Road, Xiangyang, Hubei 441053, China
| | - Meng Zhou
- School of Food Science and Technology·School of Chemical Engineering, Hubei University of Arts and Science, No. 296 Longzhong Road, Xiangyang, Hubei 441053, China
| | - Xiangsheng Jiang
- School of Food Science and Technology·School of Chemical Engineering, Hubei University of Arts and Science, No. 296 Longzhong Road, Xiangyang, Hubei 441053, China
| | - Junjun Wu
- School of Food Science and Technology·School of Chemical Engineering, Hubei University of Arts and Science, No. 296 Longzhong Road, Xiangyang, Hubei 441053, China
| | - Yang Sun
- School of Food Science and Technology·School of Chemical Engineering, Hubei University of Arts and Science, No. 296 Longzhong Road, Xiangyang, Hubei 441053, China; School of Life Sciences, Tsinghua University, Beijing 100084, China.
| |
Collapse
|
4
|
Hydrogen bond dynamics and vibrational spectral diffusion in aqueous solution of formaldehyde: a first principles molecular dynamics study. Theor Chem Acc 2018. [DOI: 10.1007/s00214-018-2333-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
5
|
Scheurer M, Herbst MF, Reinholdt P, Olsen JMH, Dreuw A, Kongsted J. Polarizable Embedding Combined with the Algebraic Diagrammatic Construction: Tackling Excited States in Biomolecular Systems. J Chem Theory Comput 2018; 14:4870-4883. [DOI: 10.1021/acs.jctc.8b00576] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Maximilian Scheurer
- Interdisciplinary Center for Scientific Computing, Heidelberg University, D-69120 Heidelberg, Germany
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Michael F. Herbst
- Interdisciplinary Center for Scientific Computing, Heidelberg University, D-69120 Heidelberg, Germany
| | - Peter Reinholdt
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, DK-5230 Odense M, Denmark
| | - Jógvan Magnus Haugaard Olsen
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, UiT The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Andreas Dreuw
- Interdisciplinary Center for Scientific Computing, Heidelberg University, D-69120 Heidelberg, Germany
| | - Jacob Kongsted
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, DK-5230 Odense M, Denmark
| |
Collapse
|
6
|
Affiliation(s)
- Basile F. E. Curchod
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom
| | - Todd J. Martínez
- Department of Chemistry and PULSE Institute, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| |
Collapse
|
7
|
Cassone G, Sponer J, Sponer JE, Pietrucci F, Saitta AM, Saija F. Synthesis of (d)-erythrose from glycolaldehyde aqueous solutions under electric field. Chem Commun (Camb) 2018; 54:3211-3214. [DOI: 10.1039/c8cc00045j] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A Miller-like numerical experiment demonstrates that ubiquitarious molecules such as water and glycolaldehyde can synthesize (d)-erythrose, one of the direct precursors of ribose.
Collapse
Affiliation(s)
- Giuseppe Cassone
- Institute of Biophysics, Czech Academy of Sciences
- 61265 Brno
- Czech Republic
| | - Jiri Sponer
- Institute of Biophysics, Czech Academy of Sciences
- 61265 Brno
- Czech Republic
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University
- 77146 Olomouc
| | - Judit E. Sponer
- Institute of Biophysics, Czech Academy of Sciences
- 61265 Brno
- Czech Republic
- Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University
- 77146 Olomouc
| | - Fabio Pietrucci
- Sorbonne Universités, Université Pierre et Marie Curie Paris 06, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS, Muséum national d’Histoire naturelle, Institut de Recherche pour le Développement
- F-75005 Paris
- France
| | - A. Marco Saitta
- Sorbonne Universités, Université Pierre et Marie Curie Paris 06, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS, Muséum national d’Histoire naturelle, Institut de Recherche pour le Développement
- F-75005 Paris
- France
| | - Franz Saija
- CNR-IPCF, Viale Ferdinando Stagno d’Alcontres 37
- 98158 Messina
- Italy
| |
Collapse
|
8
|
Chakraborty P, Karsili TNV, Marchetti B, Matsika S. Mechanistic insights into photoinduced damage of DNA and RNA nucleobases in the gas phase and in bulk solution. Faraday Discuss 2018; 207:329-350. [DOI: 10.1039/c7fd00188f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanistic details of well-known photohydrate lesions are explored using state-of-the-art computational methods.
Collapse
|
9
|
Yadav VK. Formaldehyde-mediated spectroscopic properties of heavy water from first principles simulation. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2017.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
10
|
Howard JC, Womack JC, Dziedzic J, Skylaris CK, Pritchard BP, Crawford TD. Electronically Excited States in Solution via a Smooth Dielectric Model Combined with Equation-of-Motion Coupled Cluster Theory. J Chem Theory Comput 2017; 13:5572-5581. [DOI: 10.1021/acs.jctc.7b00833] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. Coleman Howard
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - James C. Womack
- Department
of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Jacek Dziedzic
- Department
of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
- Faculty
of Applied Physics and Mathematics, Gdańsk University of Technology, Gdańsk 80-233, Poland
| | - Chris-Kriton Skylaris
- Department
of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Benjamin P. Pritchard
- Molecular Sciences Software Institute, Virginia Tech, Blacksburg, Virginia 24060, United States
| | - T. Daniel Crawford
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| |
Collapse
|
11
|
Vlasceanu A, Frandsen BN, Skov AB, Hansen AS, Rasmussen MG, Kjaergaard HG, Mikkelsen KV, Nielsen MB. Photoswitchable Dihydroazulene Macrocycles for Solar Energy Storage: The Effects of Ring Strain. J Org Chem 2017; 82:10398-10407. [DOI: 10.1021/acs.joc.7b01760] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Alexandru Vlasceanu
- Department of Chemistry,
Center for Exploitation of Solar Energy, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Benjamin N. Frandsen
- Department of Chemistry,
Center for Exploitation of Solar Energy, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Anders B. Skov
- Department of Chemistry,
Center for Exploitation of Solar Energy, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Anne Schou Hansen
- Department of Chemistry,
Center for Exploitation of Solar Energy, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Mads Georg Rasmussen
- Department of Chemistry,
Center for Exploitation of Solar Energy, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Henrik G. Kjaergaard
- Department of Chemistry,
Center for Exploitation of Solar Energy, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Kurt V. Mikkelsen
- Department of Chemistry,
Center for Exploitation of Solar Energy, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Mogens Brøndsted Nielsen
- Department of Chemistry,
Center for Exploitation of Solar Energy, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| |
Collapse
|
12
|
Guido CA, Scalmani G, Mennucci B, Jacquemin D. Excited state gradients for a state-specific continuum solvation approach: The vertical excitation model within a Lagrangian TDDFT formulation. J Chem Phys 2017; 146:204106. [DOI: 10.1063/1.4983696] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
|
13
|
Olsen ST, Hansen T, Mikkelsen KV. Predicting transport regime and local electrostatic environment from Coulomb blockade diamond sizes. J Chem Phys 2017; 146:104306. [PMID: 28298124 DOI: 10.1063/1.4978243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Electron transport through a molecule is often described in one of the two regimes: the coherent tunnelling regime or the Coulomb blockade regime. The twilight zone of the two regimes still possesses many unsolved questions. A theoretical analysis of the oligophenylenevinylene OPV3 experiments by Bjørnholm and co-workers is performed. The experiments showed how two OPV3 derivatives performed very differently despite the strong similarity of the molecular structure, hence the experimental data showed two different transport mechanisms. The different transport mechanisms of the two OPV3 derivatives are explained from quantum mechanical calculations of the molecular redox energies and from the experimentally accessible window size.
Collapse
Affiliation(s)
- Stine T Olsen
- Department of Chemistry, University of Copenhagen, Copenhagen, Denmark
| | - Thorsten Hansen
- Department of Chemistry, University of Copenhagen, Copenhagen, Denmark
| | - Kurt V Mikkelsen
- Department of Chemistry, University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
14
|
Chattopadhyaya M, Murugan NA, Rinkevicius Z. Origin of the Absorption Band of Bromophenol Blue in Acidic and Basic pH: Insight from a Combined Molecular Dynamics and TD-DFT/MM Study. J Phys Chem A 2016; 120:7175-82. [DOI: 10.1021/acs.jpca.6b07660] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- M. Chattopadhyaya
- Division of Theoretical Chemistry & Biology, School of Biotechnology, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - N. Arul Murugan
- Division of Theoretical Chemistry & Biology, School of Biotechnology, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Zilvinas Rinkevicius
- Division of Theoretical Chemistry & Biology, School of Biotechnology, KTH Royal Institute of Technology, SE-106 91 Stockholm, Sweden
- Swedish
e-Science Research Center (SeRC), KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| |
Collapse
|
15
|
Schröder H, Schwabe T. Efficient determination of accurate atomic polarizabilities for polarizeable embedding calculations. J Comput Chem 2016; 37:2052-9. [PMID: 27317509 PMCID: PMC5094558 DOI: 10.1002/jcc.24425] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 05/03/2016] [Accepted: 05/23/2016] [Indexed: 12/16/2022]
Abstract
We evaluate embedding potentials, obtained via various methods, used for polarizable embedding computations of excitation energies of para-nitroaniline in water and organic solvents as well as of the green fluorescent protein. We found that isotropic polarizabilities derived from DFTD3 dispersion coefficients correlate well with those obtained via the LoProp method. We show that these polarizabilities in conjunction with appropriately derived point charges are in good agreement with calculations employing static multipole moments up to quadrupoles and anisotropic polarizabilities for both computed systems. The (partial) use of these easily-accessible parameters drastically reduces the computational effort to obtain accurate embedding potentials especially for proteins. © 2016 The Authors. Journal of Computational Chemistry Published by Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Heiner Schröder
- Center for Bioinformatics and Institute of Physical Chemistry, University of Hamburg, Bundesstraße 43, Hamburg, 20146, Germany
| | - Tobias Schwabe
- Center for Bioinformatics and Institute of Physical Chemistry, University of Hamburg, Bundesstraße 43, Hamburg, 20146, Germany
| |
Collapse
|
16
|
Meng S, Caprasecca S, Guido CA, Jurinovich S, Mennucci B. Negative solvatochromism of push–pull biphenyl compounds: a theoretical study. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1754-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
|
17
|
Nielsen CBO, Mikkelsen KV. Optical properties of pyridine and methyl-pyridinium in water using DFT/MM. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1015643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
18
|
VBEFP/PCM: a QM/MM/PCM approach for valence-bond method and its application for the vertical excitations of formaldehyde and acetone in aqueous solution. Sci China Chem 2014. [DOI: 10.1007/s11426-014-5192-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
19
|
Sjöqvist J, Linares M, Mikkelsen KV, Norman P. QM/MM-MD simulations of conjugated polyelectrolytes: a study of luminescent conjugated oligothiophenes for use as biophysical probes. J Phys Chem A 2014; 118:3419-28. [PMID: 24738472 DOI: 10.1021/jp5009835] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A methodological development is reported for the study of luminescence properties of conjugated polyelectrolytes, encompassing systems in which dihedral rotational barriers are easily overcome at room temperature. The components of the model include (i) a molecular mechanics (MM) force field description of the solvent in its electronic ground state as well as the chromophore in its electronic ground and excited states, (ii) a conformational sampling by means of classical molecular dynamics (MD) in the respective electronic states, and (iii) spectral response calculations by means of the quantum mechanics/molecular mechanics QM/MM approach. A detailed analysis of the combined polarization effects of the ionic moiety and the polar water solvent is presented. At an increased computational cost of 30% compared to a calculation excluding the solvent, the error in the transition wavelength of the dominant absorption band is kept as small as 1 nm as compared to the high-quality benchmark result, based largely on a QM description of the solvent. At a reduced computational cost the error of the same quantity is kept as small as 6 nm, with the cost reduction being the result of an effective description of the effects of the solvent by means of replacing the carboxylate ions with neutral hydrogens. In absorption spectroscopy, the obtained best theoretical results are in excellent agreement with the experimental benchmark measurement, regarding excitation energies as well as band intensities and profiles. In fluorescence spectroscopy, the experimental spectrum shows a vibrational progression that is not addressed by theory, but the theoretical band position is in excellent agreement with experiment, with a highly accurate description of the Stokes shift as a result.
Collapse
Affiliation(s)
- Jonas Sjöqvist
- Department of Physics, Chemistry and Biology, Linköping University , SE-581 83 Linköping, Sweden
| | | | | | | |
Collapse
|
20
|
Murugan NA, Zaleśny R, Kongsted J, Ågren H. Chelation-Induced Quenching of Two-Photon Absorption of Azacrown Ether Substituted Distyryl Benzene for Metal Ion Sensing. J Chem Theory Comput 2014; 10:778-88. [DOI: 10.1021/ct400924u] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- N Arul Murugan
- Division of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology , SE-10691 Stockholm, Sweden
| | - Robert Zaleśny
- Division of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology , SE-10691 Stockholm, Sweden.,Theoretical Chemistry Group, Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, Wyb , Wyspiańskiego 27, PL-50370 Wrocław, Poland
| | - Jacob Kongsted
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark , Campusvej 55, DK-5230 Odense M, Denmark
| | - Hans Ågren
- Division of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology , SE-10691 Stockholm, Sweden
| |
Collapse
|
21
|
Recent Advances in the Coupled-Cluster Analytical Derivatives Theory for Molecules in Solution Described With the Polarizable Continuum Model (PCM). ADVANCES IN QUANTUM CHEMISTRY 2012. [DOI: 10.1016/b978-0-12-396498-4.00001-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
22
|
Murugan NA, Kongsted J, Rinkevicius Z, Ågren H. Color modeling of protein optical probes. Phys Chem Chem Phys 2012; 14:1107-12. [DOI: 10.1039/c1cp23060c] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
23
|
Selvaraj S, Arul Murugan N, Ågren H. Al3+ induced planarization, conformational arrest and metallochromic shift in a pyrimidine dione dye: insight from integrated hybrid quantum–classical calculations. Phys Chem Chem Phys 2012; 14:2339-45. [DOI: 10.1039/c2cp23238c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
24
|
Li YK, Wu HY, Zhu Q, Fu KX, Li XY. Solvent effect on the UV/Vis absorption spectra in aqueous solution: The nonequilibrium polarization with an explicit representation of the solvent environment. COMPUT THEOR CHEM 2011. [DOI: 10.1016/j.comptc.2011.06.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
25
|
Affiliation(s)
- Veronica Vaida
- Department of Chemistry and Biochemistry, CIRES, University of Colorado, Boulder, Colorado 80309-0215, USA
| |
Collapse
|
26
|
Rinkevicius Z, Murugan NA, Kongsted J, Aidas K, Steindal AH, Ågren H. Density Functional Theory/Molecular Mechanics Approach for Electronic g-Tensors of Solvated Molecules. J Phys Chem B 2011; 115:4350-8. [DOI: 10.1021/jp1108653] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Zilvinas Rinkevicius
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, SE-106 91 Stockholm, Sweden
- Swedish e-Science Research Center (SeRC), Royal Institute of Technology, 10044 Stockholm, Sweden
| | - N. Arul Murugan
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Jacob Kongsted
- Department of Physics and Chemistry, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Kęstutis Aidas
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Arnfinn Hykkerud Steindal
- Centre of Theoretical and Computational Chemistry, Department of Chemistry, University of Tromsø, N-9037 Tromsø, Norway
| | - Hans Ågren
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| |
Collapse
|
27
|
De Silva N, Zahariev F. Implementation of the analytic energy gradient for the combined time-dependent density functional theory/effective fragment potential method: Application to excited-state molecular dynamics simulations. J Chem Phys 2011; 134:054111. [DOI: 10.1063/1.3523578] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
|
28
|
Arul Murugan N, Kongsted J, Rinkevicius Z, Aidas K, Mikkelsen KV, Ågren H. Hybrid density functional theory/molecular mechanics calculations of two-photon absorption of dimethylamino nitro stilbene in solution. Phys Chem Chem Phys 2011; 13:12506-16. [DOI: 10.1039/c1cp20611g] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
29
|
Kawashima Y, Nakano H, Jung J, Ten-no S. A combined quantum mechanical and molecular mechanical method using modified generalized hybrid orbitals: implementation for electronic excited states. Phys Chem Chem Phys 2011; 13:11731-8. [DOI: 10.1039/c1cp20438f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
30
|
Lupieri P, Ippoliti E, Altoè P, Garavelli M, Mwalaba M, Carloni P. Spectroscopic Properties of Formaldehyde in Aqueous Solution: Insights from Car−Parrinello and TDDFT/CASPT2 Calculations. J Chem Theory Comput 2010; 6:3403-9. [DOI: 10.1021/ct100384f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Paola Lupieri
- German Research School for Simulation Sciences GmbH, 52425 Jülich and RWTH Aachen, Germany, SISSA, via Bonomea 265, 34136 Trieste, Italy, Department of Chemistry “G. Ciamician”, University of Bologna, via Selmi 2, I-40126 Bologna, Italy, International Centre for Theoretical Physics (ICTP), Strada Costiera 11, 34151 Trieste, Italy, and Democritos Modeling Center for Research in Atomistic Simulation, via Bonomea 265, 34136 Trieste, Italy
| | - Emiliano Ippoliti
- German Research School for Simulation Sciences GmbH, 52425 Jülich and RWTH Aachen, Germany, SISSA, via Bonomea 265, 34136 Trieste, Italy, Department of Chemistry “G. Ciamician”, University of Bologna, via Selmi 2, I-40126 Bologna, Italy, International Centre for Theoretical Physics (ICTP), Strada Costiera 11, 34151 Trieste, Italy, and Democritos Modeling Center for Research in Atomistic Simulation, via Bonomea 265, 34136 Trieste, Italy
| | - Piero Altoè
- German Research School for Simulation Sciences GmbH, 52425 Jülich and RWTH Aachen, Germany, SISSA, via Bonomea 265, 34136 Trieste, Italy, Department of Chemistry “G. Ciamician”, University of Bologna, via Selmi 2, I-40126 Bologna, Italy, International Centre for Theoretical Physics (ICTP), Strada Costiera 11, 34151 Trieste, Italy, and Democritos Modeling Center for Research in Atomistic Simulation, via Bonomea 265, 34136 Trieste, Italy
| | - Marco Garavelli
- German Research School for Simulation Sciences GmbH, 52425 Jülich and RWTH Aachen, Germany, SISSA, via Bonomea 265, 34136 Trieste, Italy, Department of Chemistry “G. Ciamician”, University of Bologna, via Selmi 2, I-40126 Bologna, Italy, International Centre for Theoretical Physics (ICTP), Strada Costiera 11, 34151 Trieste, Italy, and Democritos Modeling Center for Research in Atomistic Simulation, via Bonomea 265, 34136 Trieste, Italy
| | - M. Mwalaba
- German Research School for Simulation Sciences GmbH, 52425 Jülich and RWTH Aachen, Germany, SISSA, via Bonomea 265, 34136 Trieste, Italy, Department of Chemistry “G. Ciamician”, University of Bologna, via Selmi 2, I-40126 Bologna, Italy, International Centre for Theoretical Physics (ICTP), Strada Costiera 11, 34151 Trieste, Italy, and Democritos Modeling Center for Research in Atomistic Simulation, via Bonomea 265, 34136 Trieste, Italy
| | - Paolo Carloni
- German Research School for Simulation Sciences GmbH, 52425 Jülich and RWTH Aachen, Germany, SISSA, via Bonomea 265, 34136 Trieste, Italy, Department of Chemistry “G. Ciamician”, University of Bologna, via Selmi 2, I-40126 Bologna, Italy, International Centre for Theoretical Physics (ICTP), Strada Costiera 11, 34151 Trieste, Italy, and Democritos Modeling Center for Research in Atomistic Simulation, via Bonomea 265, 34136 Trieste, Italy
| |
Collapse
|
31
|
Si D, Li H. Analytic energy gradient in combined time-dependent density functional theory and polarizable force field calculation. J Chem Phys 2010; 133:144112. [DOI: 10.1063/1.3491814] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
32
|
Wang Y, Li H. Excited state geometry of photoactive yellow protein chromophore: A combined conductorlike polarizable continuum model and time-dependent density functional study. J Chem Phys 2010; 133:034108. [DOI: 10.1063/1.3462248] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
|
33
|
Sjöqvist J, Linares M, Norman P. Platinum(II) and Phosphorus MM3 Force Field Parametrization for Chromophore Absorption Spectra at Room Temperature. J Phys Chem A 2010; 114:4981-7. [DOI: 10.1021/jp911046u] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Jonas Sjöqvist
- Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
| | - Mathieu Linares
- Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
| | - Patrick Norman
- Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
| |
Collapse
|
34
|
Tiberio G, Muccioli L, Berardi R, Zannoni C. How Does the Trans-Cis Photoisomerization of Azobenzene Take Place in Organic Solvents? Chemphyschem 2010; 11:1018-28. [DOI: 10.1002/cphc.200900652] [Citation(s) in RCA: 131] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
35
|
QM/MM Approaches to the Electronic Spectra of Hydrogen-Bonding Systems with Connection to Many-Body Decomposition Schemes. ADVANCES IN QUANTUM CHEMISTRY 2010. [DOI: 10.1016/s0065-3276(10)59004-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
|
36
|
Li H. Quantum mechanical/molecular mechanical/continuum style solvation model: Linear response theory, variational treatment, and nuclear gradients. J Chem Phys 2009; 131:184103. [DOI: 10.1063/1.3259550] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
37
|
Mennucci B, Cappelli C, Guido CA, Cammi R, Tomasi J. Structures and Properties of Electronically Excited Chromophores in Solution from the Polarizable Continuum Model Coupled to the Time-Dependent Density Functional Theory. J Phys Chem A 2009; 113:3009-20. [DOI: 10.1021/jp8094853] [Citation(s) in RCA: 160] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Benedetta Mennucci
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Risorgimento 35, 56126 Pisa, Italy, Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy, and Dipartimento di Chimica, Università di Parma, Viale delle Scienze 17/A, 43100 Parma, Italy
| | - Chiara Cappelli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Risorgimento 35, 56126 Pisa, Italy, Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy, and Dipartimento di Chimica, Università di Parma, Viale delle Scienze 17/A, 43100 Parma, Italy
| | - Ciro Achille Guido
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Risorgimento 35, 56126 Pisa, Italy, Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy, and Dipartimento di Chimica, Università di Parma, Viale delle Scienze 17/A, 43100 Parma, Italy
| | - Roberto Cammi
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Risorgimento 35, 56126 Pisa, Italy, Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy, and Dipartimento di Chimica, Università di Parma, Viale delle Scienze 17/A, 43100 Parma, Italy
| | - Jacopo Tomasi
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Risorgimento 35, 56126 Pisa, Italy, Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy, and Dipartimento di Chimica, Università di Parma, Viale delle Scienze 17/A, 43100 Parma, Italy
| |
Collapse
|
38
|
Garbuio V, Cascella M, Pulci O. Excited state properties of liquid water. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:033101. [PMID: 21817245 DOI: 10.1088/0953-8984/21/3/033101] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this paper, we give an overview of the state of the art in calculations of the electronic band structure and absorption spectra of water. After an introduction to the main theoretical and computational schemes used, we present results for the electronic and optical excitations of water. We focus mainly on liquid water, but spectroscopic properties of ice and vapor phase are also described. The applicability and the accuracy of first-principles methods are discussed, and results are critically presented.
Collapse
Affiliation(s)
- Viviana Garbuio
- European Theoretical Spectroscopy Facility (ETSF), CNR-INFM-SMC, Department of Physics University of Rome Tor Vergata, Italy
| | | | | |
Collapse
|
39
|
Hassey-Paradise R, Cyphersmith A, Tilley AM, Mortsolf T, Basak D, Venkataraman D, Barnes MD. Dissymmetries in fluorescence excitation and emission from single chiral molecules. Chirality 2009; 21 Suppl 1:E265-76. [DOI: 10.1002/chir.20809] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
40
|
Wanko M, Hoffmann M, Frähmcke J, Frauenheim T, Elstner M. Effect of polarization on the opsin shift in rhodopsins. 2. Empirical polarization models for proteins. J Phys Chem B 2008; 112:11468-78. [PMID: 18729405 DOI: 10.1021/jp802409k] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The explicit treatment of polarization as a many-body interaction in condensed-phase systems represents a current problem in empirical force-field development. Although a variety of efficient models for molecular polarization have been suggested, polarizable force fields are still far from common use nowadays. In this work, we consider interactive polarization models employing Thole's short-range damping scheme and assess them for application on polypeptides. Despite the simplicity of the model, we find mean polarizabilities and anisotropies of amino acid side chains in excellent agreement with MP2/cc-pVQZ benchmark calculations. Combined with restrained electrostatic potential (RESP) derived atomic charges, the models are applied in a quantum-mechanical/molecular-mechanical (QM/MM) approach. An iterative scheme is used to establish a self-consistent mutual polarization between the QM and MM moieties. This ansatz is employed to study the influence of the protein polarizability on calculated optical properties of the protonated Schiff base of retinal in rhodopsin (Rh), bacterio-rhodopsin (bR), and pharaonis sensory rhodopsin II (psRII). The shifts of the excitation energy due to the instantaneous polarization response of the protein to the charge transfer on the retinal chromophore are quantified using the high level ab initio multireference spectroscopy-oriented configuration interaction (SORCI) method. The results are compared with those of previously published QM1/QM2/MM models for bR and psRII.
Collapse
|
41
|
Aidas K, Møgelhøj A, Nilsson EJK, Johnson MS, Mikkelsen KV, Christiansen O, Söderhjelm P, Kongsted J. On the performance of quantum chemical methods to predict solvatochromic effects: The case of acrolein in aqueous solution. J Chem Phys 2008; 128:194503. [DOI: 10.1063/1.2918537] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
|
42
|
From Molecules to Droplets. ADVANCES IN QUANTUM CHEMISTRY 2008. [DOI: 10.1016/s0065-3276(07)00217-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
|
43
|
The Sequential qm/mm Method and its Applications to Solvent Effects in Electronic and Structural Properties of Solutes. CHALLENGES AND ADVANCES IN COMPUTATIONAL CHEMISTRY AND PHYSICS 2008. [DOI: 10.1007/978-1-4020-8270-2_7] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
44
|
Structure of Low-Lying Excited States of Guanine in DNA and Solution: Combined Molecular Mechanics and High-Level Coupled Cluster Studies. ACTA ACUST UNITED AC 2007. [DOI: 10.1155/2007/85978] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
High-level ab-initio equation-of-motion coupled-cluster methods with singles, doubles, and noniterative triples are used, in conjunction with the combined quantum mechanical molecular mechanics approach, to investigate the structure of low-lying
excited states of the guanine base in DNA and solvated environments. Our results indicate that while the excitation energy of the first excited state is barely changed compared to its gas-phase counterpart, the excitation energy of the second excited
state is blue-shifted by 0.24 eV.
Collapse
|
45
|
Mugnai M, Cardini G, Schettino V, Nielsen C. Ab initiomolecular dynamics study of aqueous formaldehyde and methanediol. Mol Phys 2007. [DOI: 10.1080/00268970701513864] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
46
|
Osted A, Kongsted J, Mikkelsen KV, Astrand PO, Christiansen O. Statistical mechanically averaged molecular properties of liquid water calculated using the combined coupled cluster/molecular dynamics method. J Chem Phys 2007; 124:124503. [PMID: 16599693 DOI: 10.1063/1.2176615] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Liquid water is investigated theoretically using combined molecular dynamics (MD) simulations and accurate electronic structure methods. The statistical mechanically averaged molecular properties of liquid water are calculated using the combined coupled cluster/molecular mechanics (CC/MM) method for a large number of configurations generated from MD simulations. The method includes electron correlation effects at the coupled cluster singles and doubles level and the use of a large correlation consistent basis set. A polarizable force field has been used for the molecular dynamics part in both the CC/MM method and in the MD simulation. We describe how the methodology can be optimized with respect to computational costs while maintaining the quality of the results. Using the optimized method we study the energetic properties including the heat of vaporization and electronic excitation energies as well as electric dipole and quadrupole moments, the frequency dependent electric (dipole) polarizability, and electric-field-induced second harmonic generation first and second hyperpolarizabilities. Comparisons with experiments are performed where reliable data are available. Furthermore, we discuss the important issue on how to compare the calculated microscopic nonlocal properties to the experimental macroscopic measurements.
Collapse
Affiliation(s)
- Anders Osted
- Department of Chemistry, H. C. Orsted Institute, University of Copenhagen, DK-2100 Copenhagen O, Denmark.
| | | | | | | | | |
Collapse
|
47
|
Nielsen CB, Christiansen O, Mikkelsen KV, Kongsted J. Density functional self-consistent quantum mechanics/molecular mechanics theory for linear and nonlinear molecular properties: Applications to solvated water and formaldehyde. J Chem Phys 2007; 126:154112. [PMID: 17461619 DOI: 10.1063/1.2711182] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A combined quantum mechanics/molecular mechanics (QM/MM) method is described, where the polarization between the solvent and solute is accounted for using a self-consistent scheme linear in the solvent polarization. The QM/MM method is implemented for calculation of energies and molecular response properties including the calculation of linear and quadratic response functions using the density-functional theory (DFT) and the Hartree-Fock (HF) theory. Sample calculations presented for ground-state energies, first-order ground-state properties, excitation energies, first-order excited state properties, polarizabilities, first-hyperpolarizabilities, and two-photon absorptions strengths of formaldehyde suggests that DFT may in some cases be a sufficiently reliable alternative to high-level theory, such as coupled-cluster (CC) theory, in modeling solvent shifts, whereas results obtained with the HF wave function deviate significantly from the CC results. Calculations carried out on water gives results that also are comparable with CC calculations in accuracy for ground-state and first-order properties. However, to obtain such accuracy an exchange-correlation functional capable of describing the diffuse Rydberg states must be chosen.
Collapse
Affiliation(s)
- Christian B Nielsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark.
| | | | | | | |
Collapse
|
48
|
Aidas K, Kongsted J, Osted A, Mikkelsen KV, Christiansen O. Coupled cluster calculation of the n --> pi* electronic transition of acetone in aqueous solution. J Phys Chem A 2007; 109:8001-10. [PMID: 16834182 DOI: 10.1021/jp0527094] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The combined linear response coupled cluster/molecular mechanics (CC/MM) scheme including mutual polarization effects in the coupling Hamiltonian is applied together with supermolecular CC methods to the study of the gas-to-aqueous solution blue shift of the n --> pi* excitation energy in acetone. The aug-cc-pVDZ basis set is found to be adequate for the calculation of this excitation energy. In the condensed phase, the shift in the excitation energy is obtained by statistical averaging over 800 solute-solvent configurations extracted from a molecular dynamics simulation. We find the shift to be around 1100-1200 cm(-1) depending on the specific model used to describe solvent polarization. The importance of including explicit polarization in both the molecular dynamics simulation as well as the CC/MM calculations is emphasized. Furthermore, the significant dependence of the excitation energy on the CO bond length of acetone is discussed.
Collapse
Affiliation(s)
- Kestutis Aidas
- Department of Chemistry, H. C. Ørsted Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark.
| | | | | | | | | |
Collapse
|
49
|
Hammond JR, Valiev M, deJong WA, Kowalski K. Calculations of Molecular Properties in Hybrid Coupled-Cluster and Molecular Mechanics Approach. J Phys Chem A 2007; 111:5492-8. [PMID: 17547377 DOI: 10.1021/jp070553x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We report benchmark calculations obtained with our new coupled-cluster singles and doubles (CCSD) code for calculating the first- and second-order molecular properties. This code can be easily incorporated into combined [Valiev, M.; Kowalski, K. J. Chem. Phys. 2006, 125, 211101] classical molecular mechanics (MM) and ab initio coupled-cluster (CC) calculations using NWChem, enabling us to study molecular properties in a realistic environment. To test this methodology, we discuss the results of calculations of dipole moments and static polarizabilities for the Cl2O system in the CCl4 solution using the CCSD (CC with singles and doubles) linear response approach. We also discuss the application of the asymptotic extrapolation scheme (AES) [Kowalski, K.; Valiev, M. J. Phys. Chem. A 2006, 110, 13106] in reducing the numerical cost of CCSD calculations.
Collapse
Affiliation(s)
- J R Hammond
- Department of Chemistry and the James Franck Institute, The University of Chicago, Chicago, IL 60637, USA
| | | | | | | |
Collapse
|
50
|
Aidas K, Møgelhøj A, Kjaer H, Nielsen CB, Mikkelsen KV, Ruud K, Christiansen O, Kongsted J. Solvent Effects on NMR Isotropic Shielding Constants. A Comparison between Explicit Polarizable Discrete and Continuum Approaches. J Phys Chem A 2007; 111:4199-210. [PMID: 17474726 DOI: 10.1021/jp068693e] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The gas-to-aqueous solution shifts of the 17O and 13C NMR isotropic shielding constants for the carbonyl chromophore in formaldehyde and acetone are investigated. For the condensed-phase problem, we use the hybrid density functional theory/molecular mechanics approach in combination with a statistical averaging over an appropriate number of solute-solvent configurations extracted from classical molecular dynamics simulations. The PBE0 exchange-correlation functional and the 6-311++G(2d,2p) basis set are used for the calculation of the shielding constants. London atomic orbitals are employed to ensure gauge-origin independent results. The effects of the bulk solvent molecules are found to be crucial in order to calculate accurate solvation shifts of the shielding constants. Very good agreement between the computed and experimental solvation shifts is obtained for the shielding constants of acetone when a polarizable water potential is used. Supermolecular results based on geometry-optimized molecular structures are presented. We also compare the results obtained with the polarizable continuum model to the results obtained using explicit MM molecules to model the bulk solvent effect.
Collapse
Affiliation(s)
- Kestutis Aidas
- Department of Chemistry, H. C. Ørsted Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | | | | | | | | | | | | | | |
Collapse
|