S. Nielsen

S. Hoffmann, S. Nielsen, S. Brøndsted Nielsen, 2013, Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology.

Multiply-charged negative clusters of adenosine-5′-monophosphate in the gas phase

S. Nielsen, P. Hvelplund, Bo Liu, 2005, Journal of the American Society for Mass Spectrometry.

The reduction of water clusters H+(H2O)n to (OH-)(H2O)m by double electron transfer from Cs atoms.

S. Nielsen, E. Uggerud, P. Hvelplund, 2009, Physical chemistry chemical physics : PCCP.

Formation of C60(2-) dianions in collisions between C60- and Na atoms.

S. Nielsen, P. Hvelplund, S. Tomita, 2004, Physical review letters.

Luminescence spectroscopy of oxazine dye cations isolated in vacuo.

S. Nielsen, C. Kjær, 2019, Physical chemistry chemical physics : PCCP.

Luminescence spectroscopy of chalcogen substituted rhodamine cations in vacuo

M. Stockett, S. Nielsen, M. Detty, 2017, Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology.

Counterion-controlled spectral tuning of the protonated Schiff-base retinal

I. Schapiro, S. Nielsen, L. H. Andersen, 2018, Physical Review A.

Cross‐Conjugation vs. Linear Conjugation in Donor–Bridge–Acceptor Nitrophenol Chromophores

Á. Rubio, A. Bond, M. Nielsen, 2014 .

Double-bond versus triple-bond bridges: does it matter for the charge-transfer absorption by donor-acceptor chromophores?

Á. Rubio, M. Nielsen, M. Wanko, 2010, Chemphyschem : a European journal of chemical physics and physical chemistry.

The tetrathiafulvalene dication in the gas phase: its formation and stability

M. Nielsen, S. Nielsen, Hans Jørgen Aagaard Jensen, 2003 .

Photodissociation of protonated tryptamine and its supramolecular complex with 18-crown-6 ether: Dissociation times and channels, absorption spectra, and excited states calculations

M. S. Kirketerp, S. Nielsen, U. Kadhane, 2009 .

On the Exciton Coupling between Two Chlorophyll Pigments in the Absence of a Protein Environment: Intrinsic Effects Revealed by Theory and Experiment.

M. Stockett, Á. Rubio, S. Nielsen, 2016, Angewandte Chemie.

Circular dichroism, anisotropy and absorption spectroscopy of chlorophyll b in methanol and mixed methanol-water solutions.

M. Stockett, S. Hoffmann, S. Nielsen, 2020, Physical chemistry chemical physics : PCCP.

On the wavelength dependence of UV induced thymine photolesions: a synchrotron radiation circular dichroism study.

S. Hoffmann, S. Nielsen, N. Jones, 2016, Physical chemistry chemical physics : PCCP.

UV Photophysics of DNA and RNA Nucleotides In Vacuo: Dissociation Channels, Time Scales, and Electronic Spectra

S. Nielsen, J. M. Weber, J. Wyer, 2013 .

Gas-phase fragmentation of deprotonated tryptophan and its clusters [Trpn -H]- induced by different activation methods.

S. Nielsen, R. O'hair, G. Khairallah, 2015, Rapid communications in mass spectrometry : RCM.

Electron-capture—Induced dissociation of protoporphyrin IX ions

M. Lykkegaard, S. Nielsen, U. Kadhane, 2008, Journal of the American Society for Mass Spectrometry.

On the negative vertical detachment energies of SO42-,SeO42-, and SO42-(H2O)

S. Nielsen, A. Ejsing, 2007 .

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

M. Stockett, S. Nielsen, B. Pedersen, 2016, The journal of physical chemistry. B.

Experimental and theoretical vibrational spectroscopy studies of acetohydroxamic acid and desferrioxamine B in aqueous solution: Effects of pH and iron complexation

D. C. Edwards, T. Spiro, S. Nielsen, 2005 .

Infrared spectroscopic observation of the argon isomer distribution in evaporative ensembles of I−⋅ROH⋅Arm (R=methyl, ethyl, isopropyl) clusters

Marvin Johnson, S. Nielsen, P. Ayotte, 1999 .

Absorption by DNA single strands of adenine isolated in vacuo: the role of multiple chromophores.

M. S. Kirketerp, S. Nielsen, L. M. Nielsen, 2012, The Journal of chemical physics.

Photoexcitation of tetrathiafulvalene radical cations in a storage ring: Kinetics and energetics of the dissociation process

M. Nielsen, T. Jørgensen, S. Nielsen, 2006 .

Experimental evidence for the 7,7,8,8-tetracyano-p-quinodimethane dianion in vacuo

M. Nielsen, S. Nielsen, 2003 .

On the formation of radical dications of protonated amino acids in a "microsolution" of water or acetonitrile and their reactivity towards the solvent.

T. Jørgensen, S. Nielsen, J. Forster, 2001, Chemistry.

Effects of charge location on the absorptions and lifetimes of protonated tyrosine peptides in vacuo.

J. Greenwood, S. Nielsen, H. Zettergren, 2012, The journal of physical chemistry. A.

Electron capture induced dissociation of dipeptide dications: where does the charge go?

S. Nielsen, J. Wyer, Camilla Skinnerup Jensen, 2010, Physical chemistry chemical physics : PCCP.

Ruthenium diimine complexes in unusual charge states formed in collisional electron transfer

S. Nielsen, P. Hvelplund, A. B. Nielsen, 2004 .

Electron attachment to "naked" and microsolvated nucleotide anions: detection of long-lived dianions.

S. Nielsen, P. Hvelplund, S. Tomita, 2003, Chemphyschem : a European journal of chemical physics and physical chemistry.

High-energy collision induced dissociation of iridium hexa-halide dianions: Observation of triple electron detachment and other decay pathways

S. Nielsen, C. Dessent, William E. Boxford, 2005 .

On the propensity for electron transfer in high-energy collisions of iridium complex anions with cesium atoms

S. Nielsen, R. Burke, S. Panja, 2007 .

Electron scattering on centrosymmetric molecular dianions Pt(CN)4(2-) and Pt(CN)6(2-).

S. Nielsen, L. H. Andersen, H. Bluhme, 2004, Physical Review Letters.

Biomolecular ions in accelerators and storage rings

S. Nielsen, P. Hvelplund, J. Andersen, 2004 .

Photophysics of protoporphyrin ions in vacuo: triplet-state lifetimes and quantum yields.

S. Nielsen, J. Forster, P. Hvelplund, 2004, The Journal of chemical physics.

Coulomb explosion upon electron attachment to a four-coordinate monoanionic metal complex.

S. Nielsen, P. Hvelplund, S. Tomita, 2003, Journal of the American Chemical Society.

Differences in electronic properties of fluorinated and trifluoromethylated fullerenes revealed by their propensity for dianion formation.

O. Boltalina, S. Nielsen, P. Hvelplund, 2006, The Journal of chemical physics.

Formation of long-lived fluorofullerene trianions in collisions with Na.

O. Boltalina, S. Nielsen, P. Hvelplund, 2005, The Journal of chemical physics.

Dissociation of dicarboxylate and disulfonate dianions.

J. Oomens, S. Nielsen, R. Compton, 2010, The Journal of chemical physics.

Competitive Gas-Phase Solvation of Alkali Metal Ions by Water and Methanol

P. Kebarle, S. Nielsen, M. Masella, 1999 .

Identification of the short-lived Au(N3)42− dianion from its Coulomb explosion products

S. Nielsen, P. Hvelplund, C. McKenzie, 2005 .

On the stability of isolated Pt(SCN)42- dianions in vacuo and action spectroscopy experiments

M. S. Kirketerp, S. Nielsen, J. Wyer, 2011 .

A new technique for time-resolved daughter ion mass spectrometry on the microsecond to millisecond time scale using an electrostatic ion storage ring.

M. Lykkegaard, S. Nielsen, S. Panja, 2008, The Review of scientific instruments.

Dianions of 7,7,8,8-tetracyano-p-quinodimethane and perfluorinated tetracyanoquinodimethane: information on excited states from lifetime measurements in an electrostatic storage ring and optical absorption spectroscopy.

M. Nielsen, K. Kilså, S. Nielsen, 2007, The Journal of chemical physics.

Properties of microsolvated ions: from the microenvironment of chromophore and alkali metal ions in proteins to negative ions in water clusters.

S. Nielsen, L. H. Andersen, 2006, Biophysical chemistry.

Dipole-Guided Electron Capture Causes Abnormal Dissociations of Phosphorylated Pentapeptides

F. Tureček, S. Nielsen, P. Hvelplund, 2011, Journal of the American Society for Mass Spectrometry.

Carboxyl-catalyzed prototropic rearrangements in histidine peptide radicals upon electron transfer: effects of peptide sequence and conformation.

F. Tureček, B. Paizs, S. Nielsen, 2009, Journal of the American Chemical Society.

Heat capacities of freely evaporating charged water clusters.

S. Nielsen, S. Panja, K. Hansen, 2009, The Journal of chemical physics.

On the existence of the hypervalent H3O, H2DO, HD2O, and D3O radicals

S. Nielsen, S. Panja, E. Uggerud, 2009 .

On the survival of peptide cations after electron capture: Role of internal hydrogen bonding and microsolvation

Steen Brøndsted Nielsen, Esben S Worm, T. Chakraborty, 2006, Journal of the American Society for Mass Spectrometry.

Electron loss from multiply protonated lysozyme ions in high energy collisions with molecular oxygen

T. Jørgensen, S. Nielsen, P. Hvelplund, 2001, Journal of the American Society for Mass Spectrometry.

Spectroscopic Observation of Ion-Induced Water Dimer Dissociation in the X-·(H2O)2 (X = F, Cl, Br, I) Clusters

Steen Brøndsted Nielsen, Sotiris S. Xantheas, Mark A. Johnson, 1999 .

Preparation and photoelectron spectrum of the CH3I− anion: Rare gas cluster mediated synthesis of an ion-radical complex

S. Nielsen, P. Ayotte, J. Kelley, 1999 .

Photodissociation of protonated amino acids and peptides in an ion storage ring. Determination of Arrhenius parameters in the high-temperature limit

S. Nielsen, J. Forster, P. Hvelplund, 2004 .

Roadmap on dynamics of molecules and clusters in the gas phase

M. Alcamí, P. Johnsson, M. Castrovilli, 2021, The European Physical Journal D.

Synchrotron radiation circular dichroism spectroscopy of ribose and deoxyribose sugars, adenosine, AMP and dAMP nucleotides.

T. Chakraborty, S. Hoffmann, S. Nielsen, 2005, Chemphyschem : a European journal of chemical physics and physical chemistry.

Ligand and H/D exchange of Mn(H2O)62+ and Cu(OH)(H2O)4+ in the gas phase

S. Nielsen, G. Bojesen, 1998 .

Near-infrared photoabsorption by C60 dianions in a storage ring.

O. Echt, S. Canton, S. Nielsen, 2009, The Journal of chemical physics.

Dynamic Jahn-Teller effects in isolated C60- studied by near-infrared spectroscopy in a storage ring.

O. Echt, S. Nielsen, K. Hansen, 2005, Physical review letters.

Effect of Freezing out Vibrational Modes on Gas-Phase Fluorescence Spectra of Small Ionic Dyes.

H. Kjaergaard, S. Nielsen, J. Langeland, 2021, The journal of physical chemistry letters.

Studies of Clusters and Biomolecules in ELISA

S. Nielsen, L. H. Andersen, P. Hvelplund, 2003 .

Complexation of Green and Red Kaede Fluorescent Protein Chromophores by a Zwitterion to Probe Electrostatic and Induction Field Effects

M. Stockett, S. Meech, S. Nielsen, 2022, The journal of physical chemistry. A.

Transition energies of benzoquinone anions are immune to symmetry breaking by a single water molecule.

M. Stockett, S. Nielsen, 2016, Physical chemistry chemical physics : PCCP.

Effect of a Single Water Molecule on the Electronic Absorption by o- and p-Nitrophenolate: A Shift to the Red or to the Blue?

Á. Rubio, M. Wanko, S. Nielsen, 2015, The journal of physical chemistry. A.

Gas-phase spectroscopy of protonated adenine, adenosine 5'-monophosphate and monohydrated ions.

S. Nielsen, C. S. Byskov, L. M. Baggesen, 2013, Physical chemistry chemical physics : PCCP.

Substitution effects on the absorption spectra of nitrophenolate isomers.

Á. Rubio, M. Nielsen, M. Wanko, 2012, Physical chemistry chemical physics : PCCP.

Vibrationally resolved photoabsorption spectroscopy of red fluorescent protein chromophore anions.

P. Tonge, A. Bell, S. Nielsen, 2003, Physical review letters.

Infrared spectra of hydrogen-bonded ion–radical complexes: I−⋅HCH2 and Br−⋅HCHBr

Marvin Johnson, S. Nielsen, P. Ayotte, 1999 .

Experimental studies of the photophysics of gas-phase fluorescent protein chromophores

T. Jørgensen, S. Nielsen, L. H. Andersen, 2004 .

Coincidence studies of O2−, O− and electron formation in electron-stripping of cationic biomolecules by molecular oxygen

S. Nielsen, J. Forster, P. Hvelplund, 2002 .

Gas-phase absorption properties of DsRed model chromophores

P. Tonge, A. Bell, S. Nielsen, 2003 .

Gas-phase absorption properties of a green fluorescent protein-mutant chromophore: The W7 clone

S. Nielsen, L. H. Andersen, S. Pedersen, 2003 .

Photophysics of Ionic Biochromophores

S. Nielsen, J. Wyer, 2013 .

Gas-phase spectroscopy of singly reduced tris(bipyridine)ruthenium ions, Ru(bipy)3(+).

S. Nielsen, J. M. Weber, C. S. Byskov, 2015, Physical chemistry chemical physics : PCCP.

Photophysics of Isolated Rose Bengal Anions.

M. Stockett, S. Nielsen, E. Bieske, 2020, The journal of physical chemistry. A.

Gas-Phase Spectroscopy of a Vinylheptafulvene Chromophore

K. Mikkelsen, M. Stockett, M. Nielsen, 2015, European journal of mass spectrometry.

Photoinduced dissociation mass spectroscopy of firefly oxyluciferin anions

P. Naumov, S. Nielsen, O. Maltsev, 2014 .

Spectroscopy of Ferric Heme and Protoporphyrin IX Ions In Vacuo

S. Nielsen, J. Wyer, 2013 .

A Soret marker band for four-coordinate ferric heme proteins from absorption spectra of isolated Fe(III)-Heme+ and Fe(III)-Heme+(His) ions in vacuo.

M. Lykkegaard, S. Nielsen, S. Panja, 2008, Journal of the American Chemical Society.

Photoactivation of the Cl - + CH 3 Br S N 2 Reaction via Rotationally Resolved C−H Stretch Excitation of the Cl - ·CH 3 Br Entrance Channel Complex

Marvin Johnson, S. Nielsen, P. Ayotte, 1999 .

Gas-phase Förster resonance energy transfer in mass-selected and trapped ions.

S. Nielsen, Christina Kjaer, J. Langeland, 2022, Mass spectrometry reviews.

Reciprocal- and direct-space determination of the temperature dependence of thermal vibrations in magnesium: A neutron diffraction study

B. Iversen, S. Nielsen, F. Larsen, 1995 .

On the delocalization length in RNA single strands of cytosine: how many bases see the light?

S. Hoffmann, S. Nielsen, N. Jones, 2020, Physical chemistry chemical physics : PCCP.

Cryogenic Fluorescence Spectroscopy of Ionic Fluorones in Gaseous and Condensed Phases: New Light on Their Intrinsic Photophysics.

M. Stockett, S. Nielsen, J. Bull, 2022, The journal of physical chemistry. A.

Introduction and New Aspects

S. Nielsen, 2013 .

Electron scattering on stored mononucleotide anions

S. Nielsen, L. H. Andersen, K. Seiersen, 2004 .

Fragmentation and ionization of C70 and C60 by slow ions of intermediate charge

S. Nielsen, B. Manil, P. Hvelplund, 2006 .

Tunable kHz Deep Ultraviolet (193–210 nm) Laser for Raman Applications

Steen Brøndsted Nielsen, T. Spiro, S. Nielsen, 2005, Applied spectroscopy.

Dynamics of Carbon Monoxide Binding to CooA*

J. Groves, J. Olson, G. Mclendon, 2004, Journal of Biological Chemistry.

Non-scrambling of hydrogen in NH4+(H2O)3 clusters

S. Nielsen, K. Hansen, A. Sundén, 2019, RSC advances.

Investigation of energy deposited by femtosecond electron transfer in collisions using hydrated ion nanocalorimetry.

S. Nielsen, E. Williams, P. Hvelplund, 2008, The journal of physical chemistry. A.

Kinetics of DNA duplex formation: A-tracts versus AT-tracts.

S. Hoffmann, S. Nielsen, N. Jones, 2014, Physical chemistry chemical physics : PCCP.

On the Formation of Thymine Photodimers in Thymine Single Strands and Calf Thymus DNA

S. Hoffmann, S. Nielsen, L. M. Baggesen, 2014, Photochemistry and photobiology.

Gas-phase Förster resonance energy transfer in mass-selected ions with methylene or peptide linkers between two dyes: a concerted dance of charges.

M. Stockett, S. Nielsen, K. Hansen, 2020, Physical chemistry chemical physics : PCCP.

Dynamics of Carbon Monoxide Binding to Cystathionine β-Synthase*

J. Groves, R. Banerjee, O. Kabil, 2006, Journal of Biological Chemistry.

Stability and structure of protonated clusters of ammonia and water, H+(NH3)m (H2O)n.

S. Nielsen, T. Kurtén, E. Uggerud, 2010, The journal of physical chemistry. A.

Absorption spectra of photoactive yellow protein chromophores in vacuum.

S. Nielsen, L. H. Andersen, L H Andersen, 2005, Biophysical journal.

Triply charged bradykinin and gramicidin radical cations: their formation and the selective enhancement of charge-directed cleavage processes

Steen Brøndsted Nielsen, Shigeo Tomita, T. Jørgensen, 2002 .

Experimental and theoretical vibrational spectroscopy studies of acetohydroxamic acid and desferrioxamine B in aqueous solution: Effects of pH and iron complexation

D. C. Edwards, T. Spiro, S. Nielsen, 2005 .

Effect of introducing thymine spacers into an adenine strand: Electronic decoupling?

S. Hoffmann, S. Nielsen, A. Holm, 2011 .

A Kinetic Analysis of Collision Experiments in Triple Quadrupole Instruments. Validation of the Kinetic Method

S. Nielsen, G. Bojesen, 1995 .

On the charge partitioning between c and z fragments formed after electron-capture induced dissociation of charge-tagged Lys-Lys and Ala-Lys dipeptide dications

S. Nielsen, P. Hvelplund, H. Zettergren, 2009, Journal of the American Society for Mass Spectrometry.

Unimolecular dissociation of anthracene and acridine cations: the importance of isomerization barriers for the C2H2 loss and HCN loss channels.

S. Nielsen, P. Hvelplund, H. Zettergren, 2011, The Journal of chemical physics.

Dynamics of carbon monoxide binding to cystathionine beta-synthase.

J. Groves, R. Banerjee, O. Kabil, 2006, The Journal of biological chemistry.

On the Hydrogen Loss from Protonated Nucleobases after Electronic Excitation or Collisional Electron Capture

S. Nielsen, P. Hvelplund, J. Wyer, 2009, European journal of mass spectrometry.

Hidden histidine radical rearrangements upon electron transfer to gas-phase peptide ions. Experimental evidence and theoretical analysis.

Jace W. Jones, F. Tureček, B. Paizs, 2008, Journal of the American Chemical Society.

Carboxyl-catalyzed prototropic rearrangements in histidine peptide radicals upon electron transfer: effects of peptide sequence and conformation.

F. Tureček, B. Paizs, S. Nielsen, 2009, Journal of the American Chemical Society.

Experimental evidence for an inverse hydrogen migration in arginine radicals.

F. Tureček, H. Matsubara, S. Nielsen, 2008, Journal of the American Chemical Society.

Strong coupling between adenine nucleobases in DNA single strands revealed by circular dichroism using synchrotron radiation.

S. Hoffmann, S. Nielsen, U. Kadhane, 2008, Physical review. E, Statistical, nonlinear, and soft matter physics.

Donor strength of π-extended tetrathiafulvalenes: ionisation energies vs. oxidation potentials. A joint theoretical and experimental study

M. Nielsen, J. Gisselbrecht, C. Boudon, 2004 .