A5088977034- Molecular Spectroscopy and Structure
- Advanced Chemical Physics Studies
- Atmospheric Ozone and Climate
- Spectroscopy and Laser Applications
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Quantum, superfluid, helium dynamics
- Molecular spectroscopy and chirality
- Spectroscopy and Quantum Chemical Studies
- Inorganic Fluorides and Related Compounds
- Stellar, planetary, and galactic studies
- Gyrotron and Vacuum Electronics Research
- Organic and Inorganic Chemical Reactions
- Planetary Science and Exploration
- Isotope Analysis in Ecology
- Mass Spectrometry Techniques and Applications
- Solid-state spectroscopy and crystallography
- Advanced Chemical Sensor Technologies
- Photochemistry and Electron Transfer Studies
- Analytical Chemistry and Chromatography
- Thermodynamic properties of mixtures
- Advanced Physical and Chemical Molecular Interactions
- Gas Sensing Nanomaterials and Sensors
- Scientific Research and Discoveries
- Field-Flow Fractionation Techniques
Polish Academy of Sciences
2015-2024
Institute of Physics
2015-2024
Czech Academy of Sciences, Institute of Physics
2010-2021
University of Wisconsin–Madison
2018
Polish Academy of Learning
2018
Wojewódzki Inspektorat Ochrony Środowiska w Warszawie
2017
Max Planck Institute for the Structure and Dynamics of Matter
2016
Universidad de Valladolid
1998-2016
Wright State University
2016
Centro de Astrobiología
2016
Theory predicts the water hexamer to be smallest cluster with a three-dimensional hydrogen-bonding network as its minimum energy structure. There are several possible low-energy isomers, and calculations different methods basis sets assign them relative stabilities. Previous experimental work has provided evidence for cage, book, cyclic but no experiment identified multiple coexisting structures. Here, we report that broadband rotational spectroscopy in pulsed supersonic expansion...
Gear-like rotation by a wobbly water duo The molecules in liquid move about constantly, but on average they cling to each other through hydrogen bonds, like dancers who keep switching partners. Richardson et al. uncovered fresh twist this molecular dance (see the Perspective Clary). Studying clusters of six each—essentially smallest three-dimensional droplets—they observed coupled motion two different cluster. process breaks bonds concurrently pattern akin rotating gears. Science , issue p....
We have searched for interstellar conformer I glycine (NH2CH2COOH), the simplest amino acid, in hot molecular cores Sgr B2(N-LMH), Orion KL, and W51 e1/e2. An improved search strategy intrinsically weak lines, involving multisource observations, has been developed implemented. In total, 82 spectral frequency bands, millimeter-wave region, were observed over a 4 yr period; 27 lines detected 19 different bands one or more sources. The rotational temperatures derived from "rotation diagrams"...
Urea, NH2C(O)NH2, is a molecule of great importance in organic chemistry and biology. Two searches for urea the interstellar medium were reported past, but neither conclusive. We want to take advantage increased sensitivity angular resolution provided by ALMA search toward hot cores embedded high-mass star forming region Sgr B2(N). use new spectral line survey ReMoCA performed B2(N) with its observing cycle 4. The spectra are analyzed under LTE approximation. construct full synthetic...
Abstract Broadband rotational spectroscopy of water clusters produced in a pulsed molecular jet expansion has been used to determine the oxygen atom geometry three isomers nonamer and two decamer. The for each cluster size have same nominal but differ arrangement their hydrogen bond networks. nearest neighbor OO distances show characteristic pattern network isomer that is caused by three‐body effects produce cooperative bonding. observed structures are lowest energy geometries identified...
The recent analysis of the composition frozen surface comet 67P/Churyumov-Gerasimenko has revealed a significant number complex organic molecules. Methyl isocyanate (CH3NCO) is one more abundant species detected on surface. In this work we report extensive characterization its rotational spectrum resulting in list 1269 confidently assigned laboratory lines and detection space towards Orion clouds where 399 molecule have been unambiguously identified. We find that limited mm-wave data...
We have assigned the rotational spectrum of H 2 O • HF in vibrationally excited states associated with hydrogen bond out-of-plane and in-plane bending modes v β(0) β(i) respectively. This has allowed us to decide whether equilibrium configuration at oxygen atom is planar (C 2v symmetry) or pyramidal s by combining three types information: vibrational spacing (from relative intensity measurements satellites), dependence constants on excitation frequency measurements), electric dipole moment...
Using broadband rotational spectroscopy, we report here on the delicate interplay between hydrogen bonds and dispersive forces when an unprecedentedly large organic molecule (camphor, C10H16O) is microsolvated with up to three molecules of water. Unambiguous assignment was achieved by performing multi H218O isotopic substitution clustered water molecules. The observation all possible mono- multi-H218O insertions in cluster structure yielded accurate structural information that not otherwise...
Recent simulations have indicated that vinyl cyanide is the best candidate molecule for formation of cell membranes/vesicle structures in Titan's hydrocarbon-rich lakes and seas. Although existence (C2H3CN) on Titan was previously inferred using Cassini mass spectrometry, a definitive detection has been lacking until now. We report first spectroscopic atmosphere, obtained archival data from Atacama Large Millimeter/submillimeter Array (ALMA), collected February to May 2014. detect three...
New laboratory data of CH$_2$CHCN (vinyl cyanide) in its ground and vibrationally excited states at the microwave to THz domain allow searching for these state transitions Orion-KL line survey. Frequency-modulated spectrometers combined into a single broadband 50-1900 GHz spectrum provided measurements covering spectral range 18-1893 GHz, whose assignments was confirmed by Stark modulation spectra 18-40 region ab-initio anharmonic force field calculations. For analyzing emission lines...
Most biomolecular activity takes place in aqueous environments, and it is strongly influenced by the surrounding water molecules. The hydrogen bond networks that these molecules form are likewise their interactions with solutes, thus, crucial to understand this reciprocal process. Glycoaldehyde (Gly), often considered smallest sugar, represents a good template explore steps of solvation determine how organic molecule shapes structure network solvating cluster. Here, we report broadband...
The microwave rotational spectra of the isotopic species H 2 18 0 • 19 F, 2180 HD 16 •. HF, D DF and hydrogen bonded heterodimer formed between water fluoride have been observed analysed to give constants. Evidence from effects nuclear spin statistical weights in leads conclusion that dimer 20 HF is either planar with C2V symmetry or pyramidal Cg but a low barrier inversion configuration at oxygen. r0-values heavy atom distance * F derived constants, value for 2160 being 2.662 Aj. measured...
Polycyclic aromatic hydrocarbons (PAHs) are key players in reaction chemistry. While it is postulated that they serve as a basis for ice grains, there has been no direct detection of PAHs astronomical environments. We aim to investigate the hydration set foundation future exploration potential formation pathways. report results from chirped pulse Fourier transform microwave spectroscopy and quantum-chemical calculations PAH acenaphthene complexed with up four water molecules. The...
We report the first spectroscopic detection of ethyl cyanide (C2H5CN) in Titan's atmosphere, obtained using spectrally and spatially resolved observations multiple emission lines with Atacama Large Millimeter/submillimeter Array (ALMA). The presence C2H5CN ionosphere was previously inferred from Cassini ion mass spectrometry measurements C2H5CNH+. Here we 27 rotational (in 19 separate features detected at confidence) frequency range 222–241 GHz. Simultaneous detections HC3N, CH3CN, CH3CCH...
We report the results of a broadband rotational spectroscopic study corannulene, C<sub>20</sub>H<sub>10</sub>, all its singly substituted <sup>13</sup>C isotopologues, and complex corannulene with one molecule water.
The supersonic molecular beam (absorption millimeter wave and microwave Fourier transform) spectra of the 1:1 complex between pyrimidine four isotopomers water (H2O, HDO, D2O, H218O) have been assigned. derived moments inertia are consistent with a planar (or nearly planar) structure adduct in which one hydrogen molecule is bound to nitrogen aromatic ring, “free” entgegen ring. Only high level ab initio calculations (6-31G**+MP2-BSSE) account for coplanarity ring molecule. bond stretching...
Rotational spectra of 14 different isotopomers the hydrogen-bonded dimer H2O···HCl have been measured. On application a method analysis designed to minimize effect vibration−rotation contributions ground state geometry, it was found that experimental rotational constants imply nonplanar geometry with R0(OCl) = 3.2273(3) Å, and an out-of-plane bend angle water subunit φ0 34.7(4)°. This is consistent results ab initio calculations which, at BSSE corrected, aug-cc-pVDZ/MP2 level, give φ 46° for...