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Guerra C, Ayarde-Henríquez L, Duque-Noreña M, Cárdenas C, Pérez P, Chamorro E. On the nature of bonding in the photochemical addition of two ethylenes: C-C bond formation in the excited state? Phys Chem Chem Phys 2021; 23:20598-20606. [PMID: 34505860 DOI: 10.1039/d1cp03554a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, the 2s + 2s (face-to-face) prototypical example of a photochemical reaction has been re-examined to characterize the evolution of chemical bonding. The analysis of the electron localization function (as an indirect measure of the Pauli principle) along the minimum energy path provides strong evidence supporting that CC bond formation occurs not in the excited state but in the ground electronic state after crossing the rhombohedral S1/S0 conical intersection.
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Affiliation(s)
- Cristian Guerra
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Avenida República 275, 8370146, Santiago, Chile.
| | - Leandro Ayarde-Henríquez
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Avenida República 275, 8370146, Santiago, Chile.
| | - Mario Duque-Noreña
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Avenida República 275, 8370146, Santiago, Chile.
| | - Carlos Cárdenas
- Universidad de Chile, Facultad de Ciencias, Departamento de Física, Avenida Las Palmeras 3425, Santiago, Chile. .,Centro para el Desarrollo de la Nanociencia y la Nanotecnología (CEDENNA), 9170124 Santiago, Chile
| | - Patricia Pérez
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Avenida República 275, 8370146, Santiago, Chile.
| | - Eduardo Chamorro
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Avenida República 275, 8370146, Santiago, Chile.
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Fernández-Alarcón A, Guevara-Vela JM, Casals-Sainz JL, Costales A, Francisco E, Martín Pendás Á, Rocha Rinza T. Photochemistry in Real Space: Batho- and Hypsochromism in the Water Dimer. Chemistry 2020; 26:17035-17045. [PMID: 32822523 DOI: 10.1002/chem.202002854] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Indexed: 11/09/2022]
Abstract
The development of chemical intuition in photochemistry faces several difficulties that result from the inadequacy of the one-particle picture, the Born-Oppenheimer approximation, and other basic ideas used to build models. It is shown herein how real-space approaches can be efficiently used to gain valuable insights in photochemistry through a simple example of red and blue shift effects: the double hypso- and bathochromic shifts in the low-lying valence excited states of (H2 O)2 . It is demonstrated that 1) the use of these techniques allows the perturbative language used in the theory of intermolecular interactions, even in the strongly interacting short-range regime, to be maintained; 2) one and only one molecule is photoexcited in each of the addressed excited states and 3) the electrostatic interaction between the in-the-cluster molecular dipoles provides a fairly intuitive rationalisation of the observed batho- and hypsochromism. The methods exploited and illustrated herein are able to maintain the individuality and properties of the interacting entities in a molecular aggregate, and thereby they allow chemical intuition in general states, at any geometry and using a broad variety of electronic structure methods to be kept and built.
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Affiliation(s)
- Alberto Fernández-Alarcón
- Institute of Chemistry, National Autonomous University of Mexico, 04510, Mexico City, Mexico.,Department of Analytical and Physical Chemistry, University of Oviedo, 33006, Oviedo, Spain
| | | | - José Luis Casals-Sainz
- Department of Analytical and Physical Chemistry, University of Oviedo, 33006, Oviedo, Spain
| | - Aurora Costales
- Department of Analytical and Physical Chemistry, University of Oviedo, 33006, Oviedo, Spain
| | - Evelio Francisco
- Department of Analytical and Physical Chemistry, University of Oviedo, 33006, Oviedo, Spain
| | - Ángel Martín Pendás
- Department of Analytical and Physical Chemistry, University of Oviedo, 33006, Oviedo, Spain
| | - Tomás Rocha Rinza
- Institute of Chemistry, National Autonomous University of Mexico, 04510, Mexico City, Mexico
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Tenorio BNC, Nascimento MAC, Rocha AB. Theoretical study of the absolute inner-shell photoionization cross sections of the formic acid and some of its hydrogen-bonded clusters. J Chem Phys 2019; 150:154308. [PMID: 31005109 DOI: 10.1063/1.5088491] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Inner-shell absolute photoabsorption and photoionization cross sections of the formic acid, HCOOH, and its small hydrogen-bonded clusters, i.e., (HCOOH)2, HCOOH2 +, HCOHOH+, and HCOOH·H3O+, were calculated at the time-dependent density functional theory (TDDFT) level, and the results were used to analyze the effect of the formic acid clustering on the carbon and oxygen K-edge photoionization cross sections. The discrete electronic pseudospectra obtained with square-integrable (L2) basis set calculations were used in an analytic continuation procedure based on continued fraction functions to obtain the photoabsorption cross sections. Symmetry adapted cluster configuration interaction calculations on the small formic acid clusters have also been performed at the oxygen K-edge to assign the discrete transitions and ionization potentials in support to the TDDFT results.
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Affiliation(s)
- Bruno Nunes Cabral Tenorio
- Instituto de Química, Universidade Federal do Rio de Janeiro, UFRJ, Av. Athos da Silveira Ramos, 149, Rio de Janeiro, RJ 21941-909, Brazil
| | - Marco Antonio Chaer Nascimento
- Instituto de Química, Universidade Federal do Rio de Janeiro, UFRJ, Av. Athos da Silveira Ramos, 149, Rio de Janeiro, RJ 21941-909, Brazil
| | - Alexandre Braga Rocha
- Instituto de Química, Universidade Federal do Rio de Janeiro, UFRJ, Av. Athos da Silveira Ramos, 149, Rio de Janeiro, RJ 21941-909, Brazil
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Verzeni R, Mó O, Cimas A, Corral I, Yáñez M. MS-CASPT2 study of the low-lying electronic excited states of di-thiosubstituted formic acid dimers. Theor Chem Acc 2013. [DOI: 10.1007/s00214-013-1338-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Novak J, Mališ M, Prlj A, Ljubić I, Kühn O, Došlić N. Photoinduced Dynamics of Formic Acid Monomers and Dimers: The Role of the Double Hydrogen Bond. J Phys Chem A 2012; 116:11467-75. [DOI: 10.1021/jp3074865] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jurica Novak
- Rudjer Bošković Institute, 10000 Zagreb, Croatia
| | - Momir Mališ
- Rudjer Bošković Institute, 10000 Zagreb, Croatia
| | - Antonio Prlj
- Faculty of Science, University of Zagreb, 10000 Zagreb, Croatia
| | - Ivan Ljubić
- Rudjer Bošković Institute, 10000 Zagreb, Croatia
| | - Oliver Kühn
- Institut für Physik, Universität Rostock, D-18051 Rostock, Germany
| | - Nađa Došlić
- Rudjer Bošković Institute, 10000 Zagreb, Croatia
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Krystkowiak E, Koput J, Maciejewski A. Hydrogen bond effects in the ground and excited singlet states of 4H-1-benzopyrane-4-thione in water—theory and experiment. Phys Chem Chem Phys 2012; 14:8842-51. [DOI: 10.1039/c2cp23869a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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