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Showing 13 to 24 of 78 entries
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Hydrogen bonding induced enhancement of Fermi resonances: ultrafast vibrational energy flow dynamics in aniline-d₅.

The journal of physical chemistry. B

Costard R, Greve C, Fidder H, Nibbering ET.
PMID: 25393885
J Phys Chem B. 2015 Feb 12;119(6):2711-25. doi: 10.1021/jp509977r. Epub 2014 Nov 26.

With hydrogen bonding of the amino group of aniline-d5 we can identify the roles of Fermi enhanced combination and overtone states in intramolecular vibrational re-distribution (IVR) pathways for N-H stretching excitations. Using linear Fourier transform infrared (FT-IR) spectroscopy, ultrafast...

The acidity of chloro-substituted benzenes: a comparison of gas phase, ab initio, and kinetic data.

Chemistry (Weinheim an der Bergstrasse, Germany)

Schlosser M, Marzi E, Cottet F, Büker HH, Nibbering NM.
PMID: 11560321
Chemistry. 2001 Aug 17;7(16):3511-6. doi: 10.1002/1521-3765(20010817)7:16<3511::aid-chem3511>3.0.co;2-u.

The deprotonation energies of benzene, chlorobenzene, all di-, tri-, tetrachlorobenzenes, and pentachlorobenzene have been determined in the gas phase using a Fourier transform ion cyclotron resonance mass spectrometer. The values measured differ only slightly, though significantly, from the corresponding...

Convergent synthesis of noncovalent metallodendrimers containing hydrophobic dendrons at the periphery.

The Journal of organic chemistry

van Manen HJ, Fokkens RH, Nibbering NM, van Veggel FC, Reinhoudt DN.
PMID: 11421786
J Org Chem. 2001 Jun 29;66(13):4643-50. doi: 10.1021/jo0101757.

The noncovalent synthesis of "layer-block" metallodendrimers containing hydrophobic shells of covalent dendritic wedges at the periphery is described. Starting from first- and second-generation Fréchet wedges having phosphines at their focal point, convergent dendritic growth yields third- and fourth-generation metallodendrimers...

Ag+ labeling: a convenient new tool for the characterization of hydrogen-bonded supramolecular assemblies by MALDI-TOF mass spectrometry.

Chemistry (Weinheim an der Bergstrasse, Germany)

Timmerman P, Jolliffe KA, Calama MC, Weidmann JL, Prins LJ, Cardullo F, Snellink-Ruël BH, Fokkens RH, Nibbering NM, Shinkai S, Reinhoudt DN.
PMID: 11128274
Chemistry. 2000 Nov 17;6(22):4104-15. doi: 10.1002/1521-3765(20001117)6:22<4104::aid-chem4104>3.0.co;2-q.

Herein we describe our results on the characterization of a wide variety of different hydrogen-bonded assemblies by means of a novel matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) technique with Ag+ labeling. The labeling technique with Ag+...

Metastable ion study of organosilicon compounds. Part XIV-trimethylsilylacetic acid, (CH(3))(3)SiCH(2)COOH, and its methyl ester, (CH(3))(3)SiCH(2)COOCH(3).

Journal of mass spectrometry : JMS

Tajima S, Watanabe D, Nakajima S, Sekiguchi O, Nibbering NM.
PMID: 11921371
J Mass Spectrom. 2002 Mar;37(3):299-304. doi: 10.1002/jms.284.

The unimolecular metastable decompositions of trimethylsilylacetic acid, (CH(3))(3)SiCH(2)COOH (1), and its methyl ester, (CH(3))(3)SiCH(2)COOCH(3) (2), were investigated by mass-analyzed ion kinetic energy (MIKE) spectrometry in conjunction with thermochemical data. The abundance of the molecular ions of both compounds, generated...

Femtosecond mid-infrared spectroscopy of condensed phase hydrogen-bonded systems as a probe of structural dynamics.

Faraday discussions

Rini M, Kummrow A, Dreyer J, Nibbering ET, Elsaesser T.
PMID: 12555848
Faraday Discuss. 2003;122:27-40; discussion 79-88. doi: 10.1039/b201056a.

We report the first time-resolved site-specific mid-infrared study of the photo-induced excited state hydrogen transfer reaction in 2-(2'-hydroxyphenyl)benzothiazole (HBT) with 130 fs time resolution. The transient absorption of the C=O stretching band marking the keto*-S1-state appears delayed on a...

Polar solvent fluctuations drive proton transfer in hydrogen bonded complexes of carboxylic acid with pyridines: NMR, IR and ab initio MD study.

Physical chemistry chemical physics : PCCP

Koeppe B, Pylaeva SA, Allolio C, Sebastiani D, Nibbering ET, Denisov GS, Limbach HH, Tolstoy PM.
PMID: 27942642
Phys Chem Chem Phys. 2017 Jan 04;19(2):1010-1028. doi: 10.1039/c6cp06677a.

We study a series of intermolecular hydrogen-bonded 1 : 1 complexes formed by chloroacetic acid with 19 substituted pyridines and one aliphatic amine dissolved in CD

Gas-phase ion-molecule reactions of the CH3O (+) cation.

Journal of the American Society for Mass Spectrometry

Zappey HW, Ingemann S, Nibbering NM.
PMID: 24234494
J Am Soc Mass Spectrom. 1992 Jul;3(5):515-7. doi: 10.1016/1044-0305(92)85028-I.

The methoxy cation, CH30(+), formed by collision-induced charge reversal of methoxr anions with a kinetic energy of 8 keY, has been differentiated from the isomenric CH2OH(+) ion by performing low kinetic energy ion-molecule reactions In the radiofrequency-only quadrupole of...

A liquid flatjet system for solution phase soft-x-ray spectroscopy.

Structural dynamics (Melville, N.Y.)

Ekimova M, Quevedo W, Faubel M, Wernet P, Nibbering ET.
PMID: 26798824
Struct Dyn. 2015 Aug 18;2(5):054301. doi: 10.1063/1.4928715. eCollection 2015 Sep.

We present a liquid flatjet system for solution phase soft-x-ray spectroscopy. The flatjet set-up utilises the phenomenon of formation of stable liquid sheets upon collision of two identical laminar jets. Colliding the two single water jets, coming out of...

Concerns about (99m)Tc-labelled ciprofloxacin for infection detection.

European journal of nuclear medicine

Pauwels EK, Welling MM, Lupetti A, Paulusma-Annema A, Nibbering PH, Balter HS.
PMID: 24578009
Eur J Nucl Med. 2000 Dec;27(12):1866. doi: 10.1007/s002590000378.

No abstract available.

Ultrafast vibrational frequency shifts induced by electronic excitations: naphthols in low dielectric media.

The journal of physical chemistry. A

Xiao D, Prémont-Schwarz M, Nibbering ET, Batista VS.
PMID: 22044113
J Phys Chem A. 2012 Mar 22;116(11):2775-90. doi: 10.1021/jp208426v. Epub 2011 Nov 01.

We study the solvent-induced frequency shifts of the OH-stretching mode of 1-naphthol and 2-naphthol in nonpolar/weakly polar solvents, subject to electronic excitation, with ultrafast UV/mid-infrared pump-probe spectroscopy and theoretical modeling based on Pullin's perturbative treatment of vibrational solvatochromic effects....

Anharmonic couplings underlying the ultrafast vibrational dynamics of hydrogen bonds in liquids.

Physical review letters

Huse N, Bruner BD, Cowan ML, Dreyer J, Nibbering ET, Miller RJ, Elsaesser T.
PMID: 16241692
Phys Rev Lett. 2005 Sep 30;95(14):147402. doi: 10.1103/PhysRevLett.95.147402. Epub 2005 Sep 30.

The multilevel structure and vibrational couplings of O-H stretching transitions in intermolecular hydrogen bonds of acetic acid dimers are determined by femtosecond two-dimensional photon-echo spectroscopy in the infrared. Combining experiment and theoretical calculations, we separate Fermi resonances with combination...

Showing 13 to 24 of 78 entries