1
|
Seth K, Ghosh D. Active Learning Assisted MCCI to Target Spin States. J Chem Theory Comput 2023; 19:524-531. [PMID: 36607601 DOI: 10.1021/acs.jctc.2c00935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Strongly correlated systems and their accurate solutions have been challenging to quantum chemistry. Several methods have been developed over the years for the accurate understanding of such systems, and selected configuration interaction and Monte Carlo configuration interaction (MCCI) form important classes of systems in this category. However, MCCI is plagued by slow convergence. This is further exacerbated by the fact that most of the current MCCI implementations do not target specific spin states. In our work, we use active learning assisted MCCI to speed up the convergence manyfold and also develop a method for spin targeting. This method has been tested with several model Hamiltonian systems akin to molecular systems and has shown improved convergence and accuracy.
Collapse
Affiliation(s)
- Koushik Seth
- School of Chemical Sciences, Indian Association for the Cultivation of Sciences, Jadavpur, Kolkata700032, India
| | - Debashree Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Sciences, Jadavpur, Kolkata700032, India
| |
Collapse
|
2
|
Abyar F, Novak I. A comprehensive spectroscopic study of urocanic acid: OVGF and EOM-CCSD approaches. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2021.113274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
3
|
Sharifian A, Abyar F, Behjatmanesh-Ardakani R. Electronic structure and characterization of the spectra of trans/cis tautomers of urocanic acid isomers: A diagnostic tool. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112652] [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]
|
4
|
Tuna D, Spörkel L, Barbatti M, Thiel W. Nonadiabatic dynamics simulations of photoexcited urocanic acid. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.09.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
5
|
Chang XP, Li CX, Xie BB, Cui G. Photoprotection Mechanism of p-Methoxy Methylcinnamate: A CASPT2 Study. J Phys Chem A 2015; 119:11488-97. [PMID: 26513466 DOI: 10.1021/acs.jpca.5b08434] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
p-Methoxy methylcinnamate (p-MMC) shares the same molecular skeleton with octyl methoxycinnamate sunscreen. It is recently found that adding one water to p-MMC can significantly enhance the photoprotection efficiency. However, the physical origin is elusive. Herein we have employed multireference complete active space self-consistent field (CASSCF) and multistate complete active-space second-order perturbation (MS-CASPT2) methods to scrutinize the photophysical and photochemical mechanism of p-MMC and its one-water complex p-MMC-W. Specifically, we optimize the stationary-point structures on the (1)ππ*, (1)nπ*, and S0 potential energy surfaces to locate the (1)ππ*/S0 and (1)ππ*/(1)nπ* conical intersections and to map (1)ππ* and (1)nπ* excited-state relaxation paths. On the basis of the results, we find that, for the trans p-MMC, the major (1)ππ* deactivation path is decaying to the dark (1)nπ* state via the in-plane (1)ππ*/(1)nπ* crossing point, which only need overcome a small barrier of 2.5 kcal/mol; the minor one is decaying to the S0 state via the (1)ππ*/S0 conical intersection induced by out-of-plane photoisomerization. For the cis p-MMC, these two decay paths are comparable (1)ππ* deactivation paths: one is decaying to the dark (1)nπ* state via the (1)ππ*/(1)nπ* crossing point, and the second is decaying to the ground state via the (1)ππ*/S0 conical intersection. One-water hydration stabilizes the (1)ππ* state and meanwhile destabilizes the (1)nπ* state. As a consequence, the (1)ππ* deactivation path to the dark (1)nπ* state is heavily inhibited. The related barriers are increased to 5.8 and 3.3 kcal/mol for the trans and cis p-MMC-W, respectively. In comparison, the barriers associated with the photoisomerization-induced (1)ππ* decay paths are reduced to 2.5 and 1.3 kcal/mol for the trans and cis p-MMC-W. Therefore, the (1)ππ* decay paths to the S0 state are dominant relaxation channels when adding one water molecule. Finally, the present work contributes a lot of knowledge to understanding the photoprotection mechanism of methylcinnamate derivatives.
Collapse
Affiliation(s)
- Xue-Ping Chang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University , Beijing 100875, China
| | - Chun-Xiang Li
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University , Beijing 100875, China
| | - Bin-Bin Xie
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University , Beijing 100875, China
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University , Beijing 100875, China
| |
Collapse
|
6
|
Tuna D, Sobolewski AL, Domcke W. Photochemical Mechanisms of Radiationless Deactivation Processes in Urocanic Acid. J Phys Chem B 2014; 118:976-85. [DOI: 10.1021/jp411818j] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Deniz Tuna
- Department
of Chemistry, Technische Universität München, Lichtenbergstr.
4, 85747 Garching, Germany
| | - Andrzej L. Sobolewski
- Institute
of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02668 Warsaw, Poland
| | - Wolfgang Domcke
- Department
of Chemistry, Technische Universität München, Lichtenbergstr.
4, 85747 Garching, Germany
| |
Collapse
|
7
|
Barbatti M. The role of tautomers in the UV absorption of urocanic acid. Phys Chem Chem Phys 2011; 13:4686. [DOI: 10.1039/c0cp02142c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
|
8
|
Tiwari S, Chand Mishra P. Urocanic acid as an efficient hydroxyl radical scavenger: a quantum theoretical study. J Mol Model 2010; 17:59-72. [DOI: 10.1007/s00894-010-0699-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2009] [Accepted: 02/25/2010] [Indexed: 11/30/2022]
|
9
|
Campos AM, Cárcamo C, Silva E, García S, Lemp E, Alarcón E, Edwards AM, Günther G, Lissi E. Distribution of urocanic acid isomers between aqueous solutions and n-octanol, liposomes or bovine serum albumin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2008; 90:41-6. [DOI: 10.1016/j.jphotobiol.2007.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2007] [Revised: 10/10/2007] [Accepted: 10/28/2007] [Indexed: 10/22/2022]
|
10
|
Menon EL, Perera R, Kuhn RJ, Morrison H. Reactive Oxygen Species Formation by UV-A Irradiation of Urocanic Acid and the Role of Trace Metals in This Chemistry¶. Photochem Photobiol 2007. [DOI: 10.1562/0031-8655(2003)0780567rosfbu2.0.co2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
11
|
Cembran A, Gonzalez-Luque R, Altoè P, Merchan M, Bernardi F, Olivucci M, Garavelli M. Structure, Spectroscopy, and Spectral Tuning of the Gas-Phase Retinal Chromophore: The β-Ionone “Handle” and Alkyl Group Effect. J Phys Chem A 2005; 109:6597-605. [PMID: 16834008 DOI: 10.1021/jp052068c] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The low-lying singlet states (i.e. S0, S1, and S2) of the chromophore of rhodopsin, the protonated Schiff base of 11-cis-retinal (PSB11), and of its all-trans photoproduct have been studied in isolated conditions by using ab initio multiconfigurational second-order perturbation theory. The computed spectroscopic features include the vertical excitation, the band origin, and the fluorescence maximum of both isomers. On the basis of the S0-->S1 vertical excitation, the gas-phase absorption maximum of PSB11 is predicted to be 545 nm (2.28 eV). Thus, the predicted absorption maximum appears to be closer to that of the rhodopsin pigment (2.48 eV) and considerably red-shifted with respect to that measured in solution (2.82 eV in methanol). In addition, the absorption maxima associated with the blue, green, and red cone visual pigments are tentatively rationalized in terms of the spectral changes computed for PSB11 structures featuring differently twisted beta-ionone rings. More specifically, a blue-shifted absorption maximum is explained in terms of a large twisting of the beta-ionone ring (with respect to the main conjugated chain) in the visual S-cone (blue) pigment chromophore. In contrast, the chromophore of the visual L-cone (red) pigment is expected to have a nearly coplanar beta-ionone ring yielding a six double bond fully conjugated framework. Finally, the M-cone (green) chromophore is expected to feature a twisting angle between 10 and 60 degrees. The spectroscopic effects of the alkyl substituents on the PSB11 spectroscopic properties have also been investigated. It is found that they have a not negligible stabilizing effect on the S1-S0 energy gap (and, thus, cause a red shift of the absorption maximum) only when the double bond of the beta-ionone ring conjugates significantly with the rest of the conjugated chain.
Collapse
Affiliation(s)
- Alessandro Cembran
- Dipartimento di Chimica G. Ciamician, Università di Bologna, via Selmi 2, Bologna, I-40126 Italy
| | | | | | | | | | | | | |
Collapse
|
12
|
Dmitrenko O, Reischl W, Bach RD, Spanget-Larsen J. TD-DFT Computational Insight into the Origin of Wavelength-Dependent E/Z Photoisomerization of Urocanic Acid. J Phys Chem A 2004. [DOI: 10.1021/jp0499530] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Olga Dmitrenko
- Brown Laboratory, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Institute of Organic Chemistry, University of Vienna, A-1090 Vienna, Austria, and Department of Life Sciences and Chemistry, Roskilde University, DK-4000 Roskilde, Denmark
| | - Wolfgang Reischl
- Brown Laboratory, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Institute of Organic Chemistry, University of Vienna, A-1090 Vienna, Austria, and Department of Life Sciences and Chemistry, Roskilde University, DK-4000 Roskilde, Denmark
| | - Robert D. Bach
- Brown Laboratory, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Institute of Organic Chemistry, University of Vienna, A-1090 Vienna, Austria, and Department of Life Sciences and Chemistry, Roskilde University, DK-4000 Roskilde, Denmark
| | - Jens Spanget-Larsen
- Brown Laboratory, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Institute of Organic Chemistry, University of Vienna, A-1090 Vienna, Austria, and Department of Life Sciences and Chemistry, Roskilde University, DK-4000 Roskilde, Denmark
| |
Collapse
|
13
|
Page CS, Olivucci M. Ground and excited state CASPT2 geometry optimizations of small organic molecules. J Comput Chem 2003; 24:298-309. [PMID: 12548721 DOI: 10.1002/jcc.10145] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A method for computing second-order multiconfigurational perturbation theory (CASPT2) energy gradients numerically has been implemented and applied to a range of elementary organic chromophores, including 1,3 butadiene, acrolein, and two protonated Schiff bases. Geometries of ground and excited states-as well as conical intersections-are compared with the corresponding CASSCF structures, illustrating the effect of including the correction for dynamical electron correlation. It is shown that the differences between the two methods are not readily categorized, but that, while individual changes in bond lengths can be quite large ( approximately 0.01-0.02 A), the natures and CASPT2 energetics of the structures remain similar. Exceptions to this tend to be systems that have a strong ionic character and that are not well described at the CASSCF level. Basis set effects (double- vs. triple-zeta) were examined for a limited number of examples, and found to be quite dramatic at both levels of theory.
Collapse
Affiliation(s)
- Christopher S Page
- Dipartimento di Chimica, Università di Siena, via Aldo Moro, I-53100 Siena, Italy
| | | |
Collapse
|
14
|
Menon EL, Perera R, Kuhn RJ, Morrison H. Reactive Oxygen Species Formation by UV-A Irradiation of Urocanic Acid and the Role of Trace Metals in This Chemistry¶. Photochem Photobiol 2003; 78:567-75. [PMID: 14743864 DOI: 10.1562/0031-8655(2003)078<0567:rosfbu>2.0.co;2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We have extended our study of the decomposition of urocanic acid (UCA) with ultraviolet A radiation (UV-A) by the self-sensitized generation of singlet oxygen (see Photochem. Photobiol. 75, 565 [2002]). The chemistry has been found to be partially dependent on the presence of trace metal, most likely iron. Rigorous removal of metal impurities from the reaction mixture, using Chelex, retarded (but did not eliminate) the UV-A-initiated UCA degradation. The addition of small amounts of ferric chloride to the Chelex-treated solutions restored reactivity. Chelex treatment had a modest effect on the previously reported ability of UCA photoproducts to photonick supercoiled plasmid DNA. Also, photoinactivation of Sindbis virus on irradiation with the UCA photoproducts is now reported. Inactivation of the virus by a photoproduct mixture derived from a UCA solution that had been pretreated with Chelex was less rapid and gave better behaved time-course plots than was observed for photoproducts from non-Chelex treated solutions. These results are particularly noteworthy in light of the ubiquitous presence of both UCA and iron in the skin.
Collapse
Affiliation(s)
- Elton L Menon
- Department of Chemistry, Purdue University, West Lafayette, IN 47097-2084, USA
| | | | | | | |
Collapse
|
15
|
Mohammad T. Laser-induced in vitro isomerization of urocanic acid in UVA region and the origin of excited triplet state. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)02210-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
16
|
DANIELSSON JONAS, SÖDERHÄLL JARVID, LAAKSONEN AATTO. Hydration structure and conformational dynamics of urocanic acid: a computer simulation study. Mol Phys 2002. [DOI: 10.1080/00268970210125340] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
17
|
Danielsson J, Ulicný J, Laaksonen A. A TD-DFT study of the photochemistry of urocanic acid in biologically relevant ionic, rotameric, and protomeric forms. J Am Chem Soc 2001; 123:9817-21. [PMID: 11583543 DOI: 10.1021/ja0158051] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The photochemistry of Urocanic acid, a chromophore present in human skin and linked to photoimmunosuppression and skin cancer, is investigated theoretically by means of time-dependent density functional theory. Extensive calculations are carried out for different ionic, rotameric, and protomeric forms of both the trans and cis form. Inclusion of solvation effects, here accounted for by means of a continuum solvent model, are found to be crucial for the correct description of the biologically relevant zwitterionic forms of the molecule. For the trans zwitterionic form, it is found that the planar form usually assumed in the literature is not stable, and that a realistic charge separation cannot be achieved in the gas phase. Calculated vertical excitation energies are in excellent agreement with available experimental data, with a weakly absorbing n --> pi transition around 4.0 eV, and strongly absorbing pi --> pi transitions at 4.5-4.9 eV. The debated intramolecular hydrogen bond is predicted to have a modest impact on the vertical spectra in solution, but improves agreement with experiment when included. In general, we also predict that different rotameric forms have very similar absorption spectra. In addition, we find a candidate absorbing state to link trans-urocanic acid to singlet oxygen production and subsequent photoaging of the skin.
Collapse
Affiliation(s)
- J Danielsson
- Division of Physical Chemistry, Arrhenius Laboratory, Stockholm University, S 106 91, Stockholm, Sweden
| | | | | |
Collapse
|
18
|
Rauhut G. Recent Advances in Computing Heteroatom-Rich Five- and Six-Membered Ring Systems. ADVANCES IN HETEROCYCLIC CHEMISTRY 2001. [DOI: 10.1016/s0065-2725(01)81010-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
|