1
|
Modelling of the torsional ir spectra of the HSSSH, DSSSH, and DSSSD molecules. COMPUT THEOR CHEM 2023. [DOI: 10.1016/j.comptc.2023.114080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
|
2
|
Pratt DW, Pate BH. Chirale Prägung in der Gasphase. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- David W. Pratt
- University of Vermont; Department of Chemistry; Discovery Building, 82 University Place Burlington 05405 USA
| | | |
Collapse
|
3
|
Pratt DW, Pate BH. Chiral Imprinting in the Gas Phase. Angew Chem Int Ed Engl 2017; 56:16122-16124. [PMID: 29116681 DOI: 10.1002/anie.201709438] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Indexed: 11/05/2022]
Abstract
Undoing the twist: Recent successful attempts to change the relative populations of two otherwise identical enantiomers of a large gas-phase molecule using resonant microwave fields are highlighted. Specifically, the population of a specific enantiomer of a chiral terpene could be enhanced relative to the other enantiomer by the application of a sequence of microwave pulses in a phase- and polarization-controlled manner.
Collapse
Affiliation(s)
- David W Pratt
- University of Vermont, Department of Chemistry, Discovery Building, 82 University Place, Burlington, 05405, USA
| | | |
Collapse
|
4
|
Albert S, Chen Z, Fábri C, Lerch P, Prentner R, Quack M. A combined Gigahertz and Terahertz (FTIR) spectroscopic investigation of meta-D-phenol: observation of tunnelling switching. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1226444] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Sieghard Albert
- Physical Chemistry, ETH Zurich, Zurich, Switzerland
- Swiss Light Source, Paul-Scherrer-Institute, Villigen, Switzerland
| | - Ziqiu Chen
- Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - Csaba Fábri
- Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - Philippe Lerch
- Swiss Light Source, Paul-Scherrer-Institute, Villigen, Switzerland
| | | | - Martin Quack
- Physical Chemistry, ETH Zurich, Zurich, Switzerland
| |
Collapse
|
5
|
Dietiker P, Miloglyadov E, Quack M, Schneider A, Seyfang G. Infrared laser induced population transfer and parity selection in 14NH3: A proof of principle experiment towards detecting parity violation in chiral molecules. J Chem Phys 2015; 143:244305. [DOI: 10.1063/1.4936912] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- P. Dietiker
- Physical Chemistry, ETH Zürich, CH-8093 Zürich, Switzerland
| | - E. Miloglyadov
- Physical Chemistry, ETH Zürich, CH-8093 Zürich, Switzerland
| | - M. Quack
- Physical Chemistry, ETH Zürich, CH-8093 Zürich, Switzerland
| | - A. Schneider
- Physical Chemistry, ETH Zürich, CH-8093 Zürich, Switzerland
| | - G. Seyfang
- Physical Chemistry, ETH Zürich, CH-8093 Zürich, Switzerland
| |
Collapse
|
6
|
Fábri C, Horný Ľ, Quack M. Tunneling and Parity Violation in Trisulfane (HSSSH): An Almost Ideal Molecule for Detecting Parity Violation in Chiral Molecules. Chemphyschem 2015; 16:3584-9. [DOI: 10.1002/cphc.201500801] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 09/11/2015] [Indexed: 11/12/2022]
Affiliation(s)
- Csaba Fábri
- Physical Chemistry; ETH Zürich, CH; 8093 Zürich Switzerland
| | - Ľuboš Horný
- Physical Chemistry; ETH Zürich, CH; 8093 Zürich Switzerland
| | - Martin Quack
- Physical Chemistry; ETH Zürich, CH; 8093 Zürich Switzerland
| |
Collapse
|
7
|
Quack M. On Biomolecular Homochirality as a Quasi-Fossil of the Evolution of Life. ADVANCES IN CHEMICAL PHYSICS 2014. [DOI: 10.1002/9781118959602.ch18] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
8
|
Grohmann T, Manz J, Schild A. Effects of molecular symmetry on the directions of nuclear flux densities during tunnelling in double well potentials. Mol Phys 2013. [DOI: 10.1080/00268976.2013.800599] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Thomas Grohmann
- Institut für Chemie und Biochemie, Freie Universiät Berlin , Berlin, 14195, Germany
| | - Jörn Manz
- Institut für Chemie und Biochemie, Freie Universiät Berlin , Berlin, 14195, Germany
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, Shanxi University , Taiyuan, 030006, China
| | - Axel Schild
- Institut für Chemie und Biochemie, Freie Universiät Berlin , Berlin, 14195, Germany
| |
Collapse
|
9
|
Albert S, Lerch P, Prentner R, Quack M. Tunneling and Tunneling Switching Dynamics in Phenol and Its Isotopomers from High-Resolution FTIR Spectroscopy with Synchrotron Radiation. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205990] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
10
|
Albert S, Lerch P, Prentner R, Quack M. Tunneling and tunneling switching dynamics in phenol and its isotopomers from high-resolution FTIR spectroscopy with synchrotron radiation. Angew Chem Int Ed Engl 2012; 52:346-9. [PMID: 23225305 DOI: 10.1002/anie.201205990] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Indexed: 11/11/2022]
Abstract
Tunneling and chemical reactions by tunneling switching are reported for phenol and ortho-deuterophenol on the basis of high-resolution FTIR spectroscopy. Tunneling splittings are measured for the torsional motion in the ground and several vibrationally excited states of phenol. Tunneling times range from 10 ns to 1 ps, depending on excitation. For more-highly excited torsional levels in ortho-deuterophenol, delocalization and chemical reaction by tunneling switching is found.
Collapse
|
11
|
Dryzun C, Avnir D. Chirality Measures for Vectors, Matrices, Operators and Functions. Chemphyschem 2010; 12:197-205. [DOI: 10.1002/cphc.201000715] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Revised: 10/28/2010] [Indexed: 11/12/2022]
|
12
|
Wörner HJ, Merkt F. Jahn-Teller effects in molecular cations studied by photoelectron spectroscopy and group theory. Angew Chem Int Ed Engl 2009; 48:6404-24. [PMID: 19670398 DOI: 10.1002/anie.200900526] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The traditional "ball-and-stick" concept of molecular structure fails when the motion of the electrons is coupled to that of the nuclei. Such a situation arises in the Jahn-Teller (JT) effect which is very common in open-shell molecular systems, such as radicals or ions. The JT effect is well known to chemists as a mechanism that causes the distortion of an otherwise symmetric system. Its implications on the dynamics of molecules still represent unsolved problems in many cases. Herein we review recent progress in understanding the dynamic structure of molecular cations that have a high permutational symmetry by using rotationally resolved photoelectron spectroscopy and group theory. Specifically, we show how the pseudo-Jahn-Teller effect in the cyclopentadienyl cation causes electronic localization and nuclear delocalization. The fundamental physical mechanisms underlying the vaguely defined concept of "antiaromaticity" are thereby elucidated. Our investigation of the methane cation represents the first experimental characterization of the JT effect in a threefold degenerate electronic state. A special kind of isomerism resulting from the JT effect has been discovered and is predicted to exist in all JT systems in which the minima on the potential-energy surface are separated by substantial barriers.
Collapse
Affiliation(s)
- Hans Jakob Wörner
- Laboratorium für Physikalische Chemie, ETH-Zürich, 8093 Zürich, Switzerland
| | | |
Collapse
|
13
|
Wörner H, Merkt F. Untersuchung des Jahn-Teller-Effekts in molekularen Kationen mithilfe von Photoelektronenspektroskopie und Gruppentheorie. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200900526] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
14
|
Berger R, Laubender G, Quack M, Sieben A, Stohner J, Willeke M. Isotopic chirality and molecular parity violation. Angew Chem Int Ed Engl 2006; 44:3623-6. [PMID: 15880539 DOI: 10.1002/anie.200462088] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Robert Berger
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | | | | | | | | | | |
Collapse
|
15
|
Berger R, Laubender G, Quack M, Sieben A, Stohner J, Willeke M. Isotopeneffekte durch Paritätsverletzung in chiralen Molekülen. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200462088] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
16
|
Laubender G, Berger R. Ab initio calculation of parity-violating chemical shifts in NMR spectra of chiral molecules. Chemphyschem 2003; 4:395-9. [PMID: 12728558 DOI: 10.1002/cphc.200390070] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Guido Laubender
- Chemistry Department, Technical University Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
| | | |
Collapse
|
17
|
Quack M. Wie wichtig ist Paritätsverletzung für die molekulare und biomolekulare Chiralität? Angew Chem Int Ed Engl 2002. [DOI: 10.1002/ange.200290004] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
18
|
Abstract
Parity violation leads to energy differences delta(pv)H(o)(0)=N(A)delta(pv)E of enantiomers in the femtojoule to picojoule per mole range. Recently introduced methods of electroweak quantum chemistry predict such energy differences to be one to two orders of magnitude larger than previously accepted-but still very small. How can such small energies be measured and what are the consequences for our understanding of molecular chirality, biomolecular homochirality, and perhaps fundamental physics? The review gives some tentative answers to these questions. We discuss the current status of theory and some of the current experimental approaches.
Collapse
Affiliation(s)
- Martin Quack
- ETH Zürich, Physical Chemistry, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland.
| |
Collapse
|