Results 41 to 50 of about 167,062 (317)

The phenyl vinyl ether–methanol complex: a model system for quantum chemistry benchmarking

Beilstein Journal of Organic Chemistry, 2018
The structure of the isolated aggregate of phenyl vinyl ether and methanol is studied by combining a multi-spectroscopic approach and quantum-chemical calculations in order to investigate the delicate interplay of noncovalent interactions.
Dominic Bernhard, Fabian Dietrich, Mariyam Fatima, Cristóbal Pérez, Hannes C. Gottschalk, Axel Wuttke, Ricardo A. Mata, Martin A. Suhm, Melanie Schnell, Markus Gerhards   +9 more
doaj   +1 more source

Perfluorination of Aromatic Compounds Reinforce Their van der Waals Interactions with Rare Gases: The Rotational Spectrum of Pentafluoropyridine-Ne

Molecules, 2021
The rotational spectrum of the pentafluoropyridine-Ne complex, generated in a supersonic jet, has been investigated using chirped-pulse microwave Fourier transform spectroscopy in the 2–8 GHz range.
Alberto Macario, Susana Blanco, Ibon Alkorta, Juan Carlos López   +3 more
doaj   +1 more source

High resolution spectroscopy of methyltrioxorhenium: towards the observation of parity violation in chiral molecules [PDF]

, 2010
Originating from the weak interaction, parity violation in chiral molecules has been considered as a possible origin of the biohomochirality. It was predicted in 1974 but has never been observed so far.
Alexander Shelkovnikov, Amy-Klein, Anne Amy-Klein, Arimondo, Asselin, Asselin, Auerbach, Avalos, Barra, Bast, Bast, Benoît Darquié, Berger, Berger, Bernard, Bonner, Chardonnet, Chardonnet, Christian Chardonnet, Christophe Daussy, Clara Stoeffler, Crassous, Crassous, Darquié, Daussy, De Montigny, De Montigny, Faglioni, Figgen, Figgen, Figgen, Figgen, Gajzago, Goubet, Harris, Hegstrom, Herman, Herrmann, Herzberg, Jeanne Crassous, Keszthelyi, Khriplovich, Lassen, Laure Guy, Letokhov, Margulès, Marrel, Meierheinrich, Mink, Parker, Pascale Soulard, Pickett, Pierre Asselin, Quack, Quack, Quack, Rein, Schwerdtfeger, Schwerdtfeger, Schwerdtfeger, Shelkovnikov, Shelkovnikov, Shinitzky, Sickafoose, Sullivan, Thérèse R. Huet, Wesendrup, Wikrent, Ya Zel'dovich, Yamagata, Ziskind   +70 more
core   +3 more sources

Microwave quantum logic spectroscopy and control of molecular ions

New Journal of Physics, 2013
A general method for rotational microwave spectroscopy and control of polar molecular ions via direct microwave addressing is considered. Our method makes use of spatially varying ac Stark shifts, induced by far off-resonant, focused laser beams to ...
M Shi, P F Herskind, M Drewsen, I L Chuang   +3 more
doaj   +1 more source

Precision measurement of the rotational energy-level structure of the three-electron molecule He$_2^+$

, 2016
The term values of all rotational levels of the $^4$He${_2}^+\,X^+\,^2\Sigma_u^+\,(\nu^+=0)$ ground vibronic state with rotational quantum number $N^+\le 19$ have been determined with an accuracy of 8 x 10$^{-4}$ cm$^{-1}$ ($\sim{25}$ MHz) by MQDT ...
Frédéric Merkt, Jungen C., Luca Semeria, Paul Jansen   +3 more
core   +1 more source

Revealing Internal Rotation and ¹⁴N Nuclear Quadrupole Coupling in the Atmospheric Pollutant 4-Methyl-2-nitrophenol: Interplay of Microwave Spectroscopy and Quantum Chemical Calculations

Molecules, 2023
The structure and interactions of oxygenated aromatic molecules are of atmospheric interest due to their toxicity and as precursors of aerosols. Here, we present the analysis of 4-methyl-2-nitrophenol (4MNP) using chirped pulse and Fabry–Pérot Fourier ...
Shefali Baweja, Eleonore Antonelli, Safia Hussain, Antonio Fernández-Ramos, Isabelle Kleiner, Ha Vinh Lam Nguyen, M. Eugenia Sanz   +6 more
doaj   +1 more source

A New Approach toward Transition State Spectroscopy

, 2013
Chirped-Pulse millimetre-Wave (CPmmW) rotational spectroscopy provides a new class of information about photolysis transition state(s). Measured intensities in rotational spectra determine species-isomer-vibrational populations, provided that rotational ...
Ciuba, Monika A., Field, Robert W., Guo, Hua, Muenter, John S., Park, G. Barratt, Perry, David S., Prozument, Kirill, Shaver, Rachel Glyn, Stanton, John F., Wong, Bryan M.   +9 more
core   +1 more source

Vibrational branching ratios and hyperfine structure of $^{11}$BH and its suitability for laser cooling [PDF]

, 2014
The simple structure of the BH molecule makes it an excellent candidate for direct laser cooling. We measure the branching ratios for the decay of the ${\rm A}^{1}\Pi (v'=0)$ state to vibrational levels of the ground state, ${\rm X}^{1}\Sigma^{+}$, and ...
Hendricks, R. J., Holland, D. A., Sauer, B. E., Tarbutt, M. R., Truppe, S.   +4 more
core   +2 more sources

Sensing Chirality with Rotational Spectroscopy [PDF]

Annual Review of Physical Chemistry, 2018
Chiroptical spectroscopy techniques for the differentiation of enantiomers in the condensed phase are based on an established paradigm that relies on symmetry breaking using circularly polarized light. We review a novel approach for the study of chiral molecules in the gas phase using broadband rotational spectroscopy, namely microwave three-wave ...
Rosa Domingos, Sergio Miguel, Pérez, Cristóbal, Schnell, Melanie   +2 more
openaire   +4 more sources

Spectroscopy and BVI photometry of the young open cluster NGC 6604 [PDF]

, 2000
BVI photometry (from South Africa Astron. Obs.), Echelle high resolution spectroscopy and AFOSC integral field spectroscopy (from Asiago, Italy) of the young open cluster NGC 6604 are presented. Age, distance, reddening, membership, radial and rotational
Barbon, R., Carraro, G., Munari, U., Tomasella, L., Zwitter, T.   +4 more
core   +2 more sources