IRMPD Spectroscopy of Metalated Flavins: Structure and Bonding of Lumiflavin Complexes with Alkali and Coinage Metal Ions
Autor: | Otto Dopfer, Jos Oomens, Alan Günther, Pablo Nieto, Giel Berden |
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Rok vydání: | 2016 |
Předmět: |
Molecular Structure and Dynamics
Metal ions in aqueous solution Binding energy Inorganic chemistry Ionic bonding 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Mass spectrometry Photochemistry 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry FELIX Lumiflavin Infrared multiphoton dissociation Physical and Theoretical Chemistry 0210 nano-technology Ion cyclotron resonance Metallic bonding |
Zdroj: | The Journal of Physical Chemistry A, 120, 8297-8308 The Journal of Physical Chemistry A, 120, 42, pp. 8297-8308 |
ISSN: | 1520-5215 1089-5639 |
Popis: | Flavins are a fundamental class of biomolecules, whose photochemical properties strongly depend on their environment and their redox and metalation state. Infrared multiphoton dissociation (IRMPD) spectra of mass-selected isolated metal–lumiflavin ionic complexes (M+LF) are analyzed in the fingerprint range (800–1830 cm–1) to determine the bonding of lumiflavin with alkali (M = Li, Na, K, Cs) and coinage (M = Cu, Ag) metal ions. The complexes are generated in an electrospray ionization source coupled to an ion cyclotron resonance mass spectrometer and the IR free electron laser FELIX. Vibrational and isomer assignments of the IRMPD spectra are accomplished by comparison to quantum chemical calculations at the B3LYP/cc-pVDZ level, yielding structure, binding energy, bonding mechanism, and spectral properties of the complexes. The most stable binding sites identified in the experiments involve metal bonding to the oxygen atoms of the two available CO groups of LF. Hence, CO stretching frequencies are a sens... |
Databáze: | OpenAIRE |
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