Collision cross sections of large positive fullerene molecular ions and their use as ion mobility calibrants in trapped ion mobility mass spectrometry
Sign Up to like & getrecommendations! Published in 2024 at "Analytical and Bioanalytical Chemistry"
DOI: 10.1007/s00216-024-05579-0
Abstract: Positive-ion laser desorption/ionization (LDI) of fullerenes contained in soot as produced by the Krätschmer-Huffman process delivers a wide range of fullerene molecular ions from C56+• to above C300+•. Here, the collision cross section (CCS) values… read more here.
Keywords: fullerene molecular; mobility; ion; ion mobility ... See more keywords
A new method to search for per- and polyfluoroalkyl substances (PFASs) by linking fragmentation flags with their molecular ions by drift time using ion mobility spectrometry.
Sign Up to like & getrecommendations! Published in 2019 at "Chemosphere"
DOI: 10.1016/j.chemosphere.2019.124644
Abstract: Per- and polyfluoroalkyl substances (PFASs) are a group of anthropogenic organic fluorinated compounds that have been detected widely. To discover unknown PFASs, previous researchers have applied high-resolution mass spectrometer using fragmentation flagging approach with common… read more here.
Keywords: molecular ions; time; drift time; ion ... See more keywords
Cationization and fragmentation of molecular ions sputtered from polyethylene glycol under gas cluster bombardment: An analysis by MS and MS/MS
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Mass Spectrometry"
DOI: 10.1016/j.ijms.2018.05.012
Abstract: Abstract In secondary ion mass spectrometry (SIMS), the detection of large organic molecules is accomplished using cluster ion bombardment. Ion formation often proceeds via cationization, through the attachment of (alkali) metal ions to the molecule.… read more here.
Keywords: molecular ions; mass; sputtered polyethylene; polyethylene glycol ... See more keywords
An In Silico Infrared Spectral Library of Molecular Ions for Metabolite Identification.
Sign Up to like & getrecommendations! Published in 2023 at "Analytical chemistry"
DOI: 10.1021/acs.analchem.3c01078
Abstract: Infrared ion spectroscopy (IRIS) continues to see increasing use as an analytical tool for small-molecule identification in conjunction with mass spectrometry (MS). The IR spectrum of an m/z selected population of ions constitutes a unique… read more here.
Keywords: infrared spectral; identification; spectral library; molecular ions ... See more keywords
Exploiting Molecular Ions for Screening Hydrophobic Contaminants in Sediments Using Gas Chromatography-Atmospheric Pressure Chemical Ionization-Ion Mobility-Mass Spectrometry
Sign Up to like & getrecommendations! Published in 2025 at "Environmental Science & Technology"
DOI: 10.1021/acs.est.4c13059
Abstract: Hydrophobic organic contaminants (HOCs) are conventionally screened by matching electron ionization (EI) mass spectra acquired using gas chromatography–mass spectrometry (GC–MS) to reference spectra. However, extensive in-source fragmentation hampers de novo structure elucidation of novel substances… read more here.
Keywords: mass spectrometry; mass; ionization; using gas ... See more keywords
Statistical Properties of Molecular Ions in the Ring Current Observed by the Arase (ERG) Satellite
Sign Up to like & getrecommendations! Published in 2019 at "Geophysical Research Letters"
DOI: 10.1029/2019gl084163
Abstract: Molecular ions in the magnetosphere can be a tracer of fast ion outflows from the deep ionosphere. Statistical properties of molecular ions (O2+/NO+/N2+) in the ring current are investigated based on ion composition measurements ( read more here.
Keywords: molecular ions; ions ring; ring current; erg satellite ... See more keywords
Capturing the generation and structural transformations of molecular ions
Sign Up to like & getrecommendations! Published in 2024 at "Nature"
DOI: 10.1038/s41586-023-06909-5
Abstract: Molecular ions are ubiquitous and play pivotal roles1–3 in many reactions, particularly in the context of atmospheric and interstellar chemistry4–6. However, their structures and conformational transitions7,8, particularly in the gas phase, are less explored than… read more here.
Keywords: capturing generation; structural transformations; generation structural; transformations molecular ... See more keywords
Identification of fragments from triethylamine and generation of molecular ions containing carbon and nitrogen
Sign Up to like & getrecommendations! Published in 2025 at "AIP Advances"
DOI: 10.1063/5.0281379
Abstract: This work identified ion fragments generated by triethylamine within a Freeman-type ion source. H+, H2+, C+, N+, NH2+, CNH+, N2+, C3NH8+, C4NH8+, C5NH12+, and C6NH15+ were all observed. CNH+ ions were selected using a mass… read more here.
Keywords: carbon; fragments triethylamine; generation molecular; triethylamine generation ... See more keywords
Ultrafast infrared spectroscopy with single molecular ions
Sign Up to like & getrecommendations! Published in 2019 at "New Journal of Physics"
DOI: 10.1088/1367-2630/ab3549
Abstract: We propose a method to investigate the vibrational dynamics of a single polyatomic molecular ion that is co-trapped with an atomic ion. Quantum logic techniques will be used to detect the recoil of a single… read more here.
Keywords: ultrafast infrared; infrared spectroscopy; molecular ions; single molecular ... See more keywords
Rovibrational spin-averaged transitions in the hydrogen molecular ions
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review A"
DOI: 10.1103/physreva.104.032806
Abstract: We reconsider the calculation of rovibrational transition frequencies in hydrogen molecular ions. Some previously neglected contributions, such as the deuteron polarizability, are included into consideration in comparison with our previous work. In particular, one-loop and… read more here.
Keywords: molecular ions; spin averaged; averaged transitions; rovibrational spin ... See more keywords
Near-Resonant Raman Amplification in the Rotational Quantum Wave Packets of Nitrogen Molecular Ions Generated by Strong Field Ionization.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.120.083205
Abstract: The generation of laserlike narrow bandwidth emissions from nitrogen molecular ions (N_{2}^{+}) generated in intense near- and mid infrared femtosecond laser fields has aroused much interest because of the mysterious physics underlying such a phenomenon.… read more here.
Keywords: molecular ions; wave packets; quantum wave; nitrogen molecular ... See more keywords