Nile blue shows its true colors in gas-phase absorption and luminescence ion spectroscopy

2016 ◽  
Vol 145 (10) ◽  
pp. 104303 ◽  
Author(s):  
M. H. Stockett ◽  
J. Houmøller ◽  
S. Brøndsted Nielsen
Keyword(s):  
Gas Phase ◽  
Nile Blue ◽  
Ion Spectroscopy ◽  
True Colors

The Soret absorption band of isolated chlorophyll a and b tagged with quaternary ammonium ions

2015 ◽  
Vol 17 (39) ◽  
pp. 25793-25798 ◽  
Author(s):  
Mark H. Stockett ◽  
Lihi Musbat ◽  
Christina Kjær ◽  
Jørgen Houmøller ◽  
Yoni Toker ◽  
...  
Keyword(s):  
Absorption Band ◽  
Gas Phase ◽  
Ammonium Ions ◽  
Ion Spectroscopy ◽  
Quaternary Ammonium Ions ◽  
Td Dft ◽  
Chlorophyll A And B ◽  
Gas Phase Ion ◽  
True Colors ◽  
Soret Absorption

The true colors of chlorophyll a and b, isolated in vacuo, are revealed from a combination of gas-phase ion spectroscopy and TD-DFT calculations.

scholarly journals Breslow Intermediates (Amino Enols) and Their Keto Tautomers: First Gas‐Phase Characterization by IR Ion Spectroscopy

2020 ◽  
Author(s):  
Mathias Paul ◽  
Katrin Peckelsen ◽  
Thomas Thomulka ◽  
Jonathan Martens ◽  
Giel Berden ◽  
...  
Keyword(s):  
Gas Phase ◽  
Ion Spectroscopy ◽  
Phase Characterization

scholarly journals Structural characterization of nucleotide 5′-triphosphates by infrared ion spectroscopy and theoretical studies

2018 ◽  
Vol 20 (44) ◽  
pp. 28319-28330 ◽  
Author(s):  
Rianne E. van Outersterp ◽  
Jonathan Martens ◽  
Giel Berden ◽  
Jeffrey D. Steill ◽  
Jos Oomens ◽  
...  
Keyword(s):  
Gas Phase ◽  
Structural Properties ◽  
Structural Characterization ◽  
Spectroscopic Studies ◽  
Theoretical Studies ◽  
Ion Spectroscopy ◽  
Ir Spectroscopic

Gas-phase IR spectroscopic studies and supporting theoretical studies have been performed on adenosine 5′-triphosphate, cytosine 5′-triphosphate and guanosine 5′-triphosphate to elucidate the structural properties of the NTPs by focusing on the influence of the nucleobase and the extent of deprotonation.

scholarly journals Binding motifs of cisplatin interaction with simple biomolecules and aminoacid targets probed by IR ion spectroscopy

2020 ◽  
Vol 92 (1) ◽  
pp. 3-13 ◽  
Author(s):  
Davide Corinti ◽  
Roberto Paciotti ◽  
Nazzareno Re ◽  
Cecilia Coletti ◽  
Barbara Chiavarino ◽  
...  
Keyword(s):  
Biological Activity ◽  
Amino Acid ◽  
Gas Phase ◽  
Quantum Chemical ◽  
Ligand Substitution ◽  
Side Chain ◽  
Binding Motifs ◽  
Distinctive Features ◽  
Ion Spectroscopy ◽  
Vibrational Action

AbstractThe primary intermediates resulting from the interaction of cisplatin, cis-(PtCl2(NH3)2], most widespread antitumor drug, with biomolecular targets are characterized. Electrospray ionization is used to deliver ions formed in solution into the gas phase where they are structurally interrogated by vibrational “action” spectroscopy in conjunction with quantum chemical calculations. The aquation products, cis-[PtX(NH3)2(H2O)]+ (X = Cl, OH), lying along the path responsible for biological activity, are shown to display distinctive features responding to ligation pattern and optimized geometry. The IR spectra of trans-[PtX(NH3)2(H2O)]+ are different, testifying that cis and trans complexes are stable, non interconverting species both in solution and in the gas phase. Ligand substitution by simple nucleophiles (L = pyridine, 4(5)-methylimidazole, thioanisole, trimethylphosphate, acetamide, dimethylacetamide, urea and thiourea) yields cis-[PtCl(NH3)2(L)]+ complexes displaying remarkable regioselectivity whenever L presents multiple candidate platination sites. The incipient formation of cisplatin-derived complexes with the recognized biological amino acid targets L-histidine (His) and L-methionine (Met) has been investigated revealing the primary platination event to be mainly directed at the Nπ atom of the imidazole side chain of His and to the thiomethyl sulfur of Met. The isomer and conformer population of the ensuing cis-[PtCl(NH3)2(Met/His)]+ complexes, sampled in the gas phase, can be ascertained by photofragmentation kinetics on isomer/conformer specific resonances.

scholarly journals Gas-Phase Infrared Ion Spectroscopy Characterization of Cu(II/I)Cyclam and Cu(II/I)2,2′-Bipyridine Redox Pairs

2019 ◽  
Vol 123 (19) ◽  
pp. 4149-4157 ◽  
Author(s):  
Musleh Uddin Munshi ◽  
Jonathan Martens ◽  
Giel Berden ◽  
Jos Oomens
Keyword(s):  
Gas Phase ◽  
Ion Spectroscopy

Optical spectroscopy of isolated flavins: photodissociation of protonated lumichrome

2018 ◽  
Vol 20 (11) ◽  
pp. 7407-7414 ◽  
Author(s):  
Alexander Sheldrick ◽  
David Müller ◽  
Alan Günther ◽  
Pablo Nieto ◽  
Otto Dopfer
Keyword(s):  
Gas Phase ◽  
Optical Spectroscopy ◽  
Mass Spectrometer ◽  
Optical Spectrum ◽  
Tandem Mass ◽  
Tandem Mass Spectrometer ◽  
Ion Spectroscopy

Cryogenic ion spectroscopy of protonated lumichrome realized by photodissociation of mass selected ions in a tandem mass spectrometer provides the first optical spectrum of a flavin molecule isolated in the gas phase.

Gas-Phase Ion Spectroscopy of Congo Red Dianions and Their Complexes with Betaine

2018 ◽  
Vol 122 (12) ◽  
pp. 3211-3217 ◽  
Author(s):  
Christina Kjær ◽  
James M. Lisy ◽  
Steen Brøndsted Nielsen
Keyword(s):  
Gas Phase ◽  
Congo Red ◽  
Ion Spectroscopy ◽  
Gas Phase Ion

Strong Impact of an Axial Ligand on the Absorption by Chlorophyll a and b Pigments Determined by Gas-Phase Ion Spectroscopy Experiments

2016 ◽  
Vol 120 (47) ◽  
pp. 12105-12110 ◽  
Author(s):  
Christina Kjær ◽  
Mark H. Stockett ◽  
Bjarke M. Pedersen ◽  
Steen Brøndsted Nielsen
Keyword(s):  
Gas Phase ◽  
Chlorophyll A ◽  
Axial Ligand ◽  
Strong Impact ◽  
Ion Spectroscopy ◽  
Chlorophyll A And B ◽  
Gas Phase Ion

Effect of alkali ions on optical properties of flavins: vibronic spectra of cryogenic M+lumichrome ions (M = Li–Cs) in the gas phase

2018 ◽  
Vol 20 (34) ◽  
pp. 22148-22158 ◽  
Author(s):  
Pablo Nieto ◽  
David Müller ◽  
Alexander Sheldrick ◽  
Alan Günther ◽  
Mitsuhiko Miyazaki ◽  
...  
Keyword(s):  
Optical Properties ◽  
Gas Phase ◽  
Mass Spectrometer ◽  
Large Impact ◽  
Tandem Mass ◽  
Tandem Mass Spectrometer ◽  
Alkali Ions ◽  
Ion Spectroscopy ◽  
Vibronic Spectra

Cryogenic ion spectroscopy of M+LC (M = Li–Cs) obtained by photodissociation of mass selected ions in a tandem mass spectrometer illustrates the large impact of metalation on the optical properties of the simplest flavin molecule.

Sign in / Sign up

Export Citation Format

Share Document