2
|
Kuş N, Sharma A, Peña I, Bermúdez MC, Cabezas C, Alonso JL, Fausto R. Conformers of β-aminoisobutyric acid probed by jet-cooled microwave and matrix isolation infrared spectroscopic techniques. J Chem Phys 2015; 138:144305. [PMID: 24981533 DOI: 10.1063/1.4799456] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
β-aminoisobutyric acid (BAIBA) has been studied in isolation conditions: in the gas phase and trapped into a cryogenic N2 matrix. A solid sample of the compound was vaporized by laser ablation and investigated through their rotational spectra in a supersonic expansion using two different spectroscopic techniques: broadband chirped pulse Fourier transform microwave spectroscopy and conventional molecular beam Fourier transform microwave spectroscopy. Four conformers with structures of two types could be successfully identified by comparison of the experimental rotational and (14)N nuclear quadruple coupling constants with those predicted theoretically: type A, bearing an OH⋯N intramolecular hydrogen bond and its carboxylic group in the trans geometry (H-O-C=O dihedral ∼180°), and type B, having an NH⋯O bond and the cis arrangement of the carboxylic group. These two types of conformers could also be trapped from the gas phase into a cryogenic N2 matrix and probed by Fourier transform infrared (IR) spectroscopy. In situ irradiation of BAIBA isolated in N2 matrix of type B conformers using near-IR radiation tuned at the frequency of the O-H stretching 1st overtone (∼6930 cm(-1)) of these forms allowed to selectively convert them into type A conformers and into a new type of conformers of higher energy (type D) bearing an NH⋯O=C bond and a O-H "free" trans carboxylic group.
Collapse
Affiliation(s)
- N Kuş
- Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal
| | - A Sharma
- Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal
| | - I Peña
- Grupo de Espectroscopia Molecular (GEM), Unidad Asociada CSIC, Edificio Quifima, Laboratorios de Espectroscopia y Bioespectroscopia, Universidad de Valladolid, 47005 Valladolid, Spain
| | - M C Bermúdez
- Grupo de Espectroscopia Molecular (GEM), Unidad Asociada CSIC, Edificio Quifima, Laboratorios de Espectroscopia y Bioespectroscopia, Universidad de Valladolid, 47005 Valladolid, Spain
| | - C Cabezas
- Grupo de Espectroscopia Molecular (GEM), Unidad Asociada CSIC, Edificio Quifima, Laboratorios de Espectroscopia y Bioespectroscopia, Universidad de Valladolid, 47005 Valladolid, Spain
| | - J L Alonso
- Grupo de Espectroscopia Molecular (GEM), Unidad Asociada CSIC, Edificio Quifima, Laboratorios de Espectroscopia y Bioespectroscopia, Universidad de Valladolid, 47005 Valladolid, Spain
| | - R Fausto
- Department of Chemistry, University of Coimbra, P-3004-535 Coimbra, Portugal
| |
Collapse
|
3
|
Joshi PR, Ramanathan N, Sundararajan K, Sankaran K. Evidence for Phosphorus Bonding in Phosphorus Trichloride–Methanol Adduct: A Matrix Isolation Infrared and ab Initio Computational Study. J Phys Chem A 2015; 119:3440-51. [DOI: 10.1021/jp511156d] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Prasad Ramesh Joshi
- Chemistry
Group, Indira Gandhi Center for Atomic Research, Kalpakkam 603102, Tamil Nadu, India
| | - N. Ramanathan
- Chemistry
Group, Indira Gandhi Center for Atomic Research, Kalpakkam 603102, Tamil Nadu, India
| | - K. Sundararajan
- Chemistry
Group, Indira Gandhi Center for Atomic Research, Kalpakkam 603102, Tamil Nadu, India
| | - K. Sankaran
- Chemistry
Group, Indira Gandhi Center for Atomic Research, Kalpakkam 603102, Tamil Nadu, India
| |
Collapse
|
4
|
Kuş N, Fausto R. Near-infrared and ultraviolet induced isomerization of crotonic acid in N2 and Xe cryomatrices: First observation of two high-energy trans C–O conformers and mechanistic insights. J Chem Phys 2014; 141:234310. [DOI: 10.1063/1.4903841] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Nihal Kuş
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
- Department of Physics, Anadolu University, 26470 Eskişehir, Turkey
| | - Rui Fausto
- CQC, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| |
Collapse
|
6
|
Lucena JR, Sharma A, Reva ID, Araújo RMCU, Ventura E, do Monte SA, Braga CF, Ramos MN, Fausto R. Matrix Isolation FTIR Spectroscopic and Theoretical Study of 3,3-Dichloro-1,1,1-Trifluoropropane (HCFC-243). J Phys Chem A 2008; 112:11641-8. [DOI: 10.1021/jp807388a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J. R. Lucena
- Departamento de Química, Universidade Federal da Paraíba, 58059-900 João Pessoa-PB, Brazil, Departamento de Química, Universidade of Coimbra, 3004-535 Coimbra, Portugal, and Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50739−901-Recife-PE, Brazil
| | - A. Sharma
- Departamento de Química, Universidade Federal da Paraíba, 58059-900 João Pessoa-PB, Brazil, Departamento de Química, Universidade of Coimbra, 3004-535 Coimbra, Portugal, and Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50739−901-Recife-PE, Brazil
| | - I. D. Reva
- Departamento de Química, Universidade Federal da Paraíba, 58059-900 João Pessoa-PB, Brazil, Departamento de Química, Universidade of Coimbra, 3004-535 Coimbra, Portugal, and Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50739−901-Recife-PE, Brazil
| | - R. M. C. U. Araújo
- Departamento de Química, Universidade Federal da Paraíba, 58059-900 João Pessoa-PB, Brazil, Departamento de Química, Universidade of Coimbra, 3004-535 Coimbra, Portugal, and Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50739−901-Recife-PE, Brazil
| | - E. Ventura
- Departamento de Química, Universidade Federal da Paraíba, 58059-900 João Pessoa-PB, Brazil, Departamento de Química, Universidade of Coimbra, 3004-535 Coimbra, Portugal, and Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50739−901-Recife-PE, Brazil
| | - S. A. do Monte
- Departamento de Química, Universidade Federal da Paraíba, 58059-900 João Pessoa-PB, Brazil, Departamento de Química, Universidade of Coimbra, 3004-535 Coimbra, Portugal, and Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50739−901-Recife-PE, Brazil
| | - C. F. Braga
- Departamento de Química, Universidade Federal da Paraíba, 58059-900 João Pessoa-PB, Brazil, Departamento de Química, Universidade of Coimbra, 3004-535 Coimbra, Portugal, and Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50739−901-Recife-PE, Brazil
| | - M. N. Ramos
- Departamento de Química, Universidade Federal da Paraíba, 58059-900 João Pessoa-PB, Brazil, Departamento de Química, Universidade of Coimbra, 3004-535 Coimbra, Portugal, and Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50739−901-Recife-PE, Brazil
| | - R. Fausto
- Departamento de Química, Universidade Federal da Paraíba, 58059-900 João Pessoa-PB, Brazil, Departamento de Química, Universidade of Coimbra, 3004-535 Coimbra, Portugal, and Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50739−901-Recife-PE, Brazil
| |
Collapse
|