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Atmospheric Pressure Chemical Ionization Q-Orbitrap Mass Spectrometry Analysis of Gas-Phase High-Energy Dissociation Routes of Triarylamine Derivatives.
Molecules
December 2024
School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry, Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China.
Triarylamine groups have been widely utilized in the development of high-performance charge-transporting or luminescent materials for fabricating organic light-emitting diodes (OLEDs). In this study, atmospheric pressure chemical ionization (APCI) Q-Orbitrap mass spectrometry was adopted to investigate the dissociation behaviors of these triarylamine derivatives. Specifically, taking [M+H] as the precursor ion, high-energy collision dissociation (HCD) experiments within the energy range from 0 to 80 eV were carried out.
View Article and Find Full Text PDFStatistical design approach enables optimised mechanical lysis for enhanced long-read soil metagenomics.
Sci Rep
November 2024
Faculty of Environment, Science and Economy, Amory Building, Rennes Drive, Exeter, Devon, EX4 4RJ, UK.
Metagenomic analysis has enabled insights into soil community structure and dynamics. Long-read sequencing for metagenomics can enhance microbial ecology by improving taxonomic classification, genome assembly, and functional annotation. However, protocols for purifying high-molecular weight DNA from soil are not yet optimised.
View Article and Find Full Text PDFA fragmentation study of disaccharide flavonoid C-glycosides using triple quadrupole mass spectrometry and its application for identification of flavonoid C-glycosides in Odontosoria chinensis.
Rapid Commun Mass Spectrom
January 2025
Jiangxi Provincial Institute of Traditional Chinese Medicine, Nanchang, Jiangxi, China.
Rationale: Flavonoid C-glycosides have a wide range of pharmacological activities. However, there are few mass spectrometric research on C,O-disaccharide flavonoid C-glycosides and di-C,O-saccharide flavonoid C-glycosides. Their low-energy collision-induced dissociation (ESI-CID-MS/MS) fragmentation pattern and differences have not been reported, and the fragment ion library is incomplete.
View Article and Find Full Text PDFPhotochemical and Collision-Induced Cross-Linking in Stereochemically Distinct Scaffolds of Peptides and Nitrile Imines in Gas-Phase Ions.
J Am Soc Mass Spectrom
December 2024
Department of Chemistry, Bagley Hall, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States.
Article Synopsis
- The study focuses on how peptides interact with nitrile-imine intermediates using two types of scaffolds called 1,2--peptides and 1,4--peptides, examining their cross-linking behaviors under different conditions.
- Nitrile-imine intermediates are created through specific UV and collision-induced methods, with cross-linking yield results varying significantly based on the peptide sequences studied.
- Advanced techniques, including high-resolution ion mobility and molecular dynamics simulations, were employed to analyze the structures of these conjugates and their cross-linking mechanisms, revealing the role of carboxyl and guanidine groups in the process.
Superconducting Boride NbIrB with Variable and Tunable Stacking Behaviors of Two-Dimensional [Nb-Ir-Nb] Triangular Lattices.
Nano Lett
November 2024
CAS Key Laboratory of Standardization and Measurement for Nanotechnology, National Center for Nanoscience and Technology, Beijing 100190, China.
In structures with special geometry lattices, variations in stacking sequences are ubiquitous, yielding many novel structures and functionalities. Despite a wealth of intriguing properties and wide-ranging applications, there remains a considerable gap in understanding the correlation between special geometry lattices and functionalities in borides. Here, we design and synthesize a new superconducting boride NbIrB, with a body-centered orthorhombic structure, consisting of alternating two-dimensional [Nb-Ir-Nb] triple-triangular-lattice-layers and B fragment layers.
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