Physical Chemistry Chemical Physics

Journal: Physical Chemistry Chemical Physics

Abbreviation

Phys. Chem. Chem. Phys.

Publisher

Royal Society of Chemistry

ISSN

1463-9084
1463-9076

Show all metadata

Search Results

Publications 1 - 10 of 430

Mastering the magnetic susceptibility of magnetically responsive bicelles with 3 beta-amino-5-cholestene and complexed lanthanide ions
Isabettini, Stéphane; Liebi, Marianne; Kohlbrecher, Joachim; et al. (2017)
Physical Chemistry Chemical Physics
On determining the nuclearity of iron sites in Fe-ZSM-5 - a critical evaluation
Pirngruber, Gerhard D.; Roy, Pijus K.; Prins, R. (2006)
Physical Chemistry Chemical Physics
Irreversible structural change of a dry ionic liquid under nanoconfinement
Jurado, L. Andres; Kim, Hojun; Arcifa, Andrea; et al. (2015)
Physical Chemistry Chemical Physics
Revealing the role of phosphoric acid in all-vanadium redox flow batteries with DFT calculations and in situ analysis
Oldenburg, Fabio J.; Bon, Marta; Perego, Daniele; et al. (2018)
Physical Chemistry Chemical Physics
Trapping cold molecular hydrogen
Seiler, Christian; Hogan, Stephen D.; Merkt, Frédéric (2011)
Physical Chemistry Chemical Physics
Multipole-moment effects in ion-molecule reactions at low temperatures: part III - the He+ + CH4 and He+ + CD4 reactions at low collision energies and the effect of the charge-octupole interaction
Zhelyazkova, Valentina; Martins, Fernanda B.V.; Merkt, Frédéric (2022)
Physical Chemistry Chemical Physics
We present experimental and theoretical studies of the He+ + CH4 and He+ + CD4 reactions at collision energies in the k(B).(0-10) K range. Helium atoms in a supersonic beam are excited to a low-field-seeking Rydberg-Stark state and merged with a supersonic beam of CH4 or CD4 using a curved surface-electrode deflector. The ion-molecule reactions are studied within the orbit of the helium Rydberg [He(n)] electron, which suppresses stray-electric-fields-induced heating and makes it possible to reach very low collision energies. The collision energy is varied by adjusting the velocity of the He(n) atoms with the surface deflector, keeping the velocity of the methane beam constant. The reaction product ions (C(H/D)(p)(+) with p epsilon {1,2,3}) are collected in a time-of-flight mass spectrometer and monitored as a function of the collision energy. No significant energy-dependence of the total reaction yields of either reactions is observed. The measured relative reaction rate coefficient for the He+ + CH4 reaction is approximately twice higher than the one for the He+ + CD4 reaction. The CH+, CH2+ and CH3+ (CD+, CD2+ and CD3+) ions were detected in ratios 0.28(+0.04) : 1.00(+0.11) : 0.11(+0.04) [0.35(+0.07) : 1.00(+0.16):0.04(-0.04)(+0.09)]. We also present calculations of the capture rate coefficients for the two reactions, in which the interaction between the charge of the helium ion and the octupole moment of the methane molecule is included. The rotational-state-specific capture rate coefficients are calculated for states with J = (0-3) at collision energies below k(B).15 K. After averaging over the rotational states of methane populated at the rotational temperature of the supersonic beam, the calculations only predict extremely weak enhancements (in the order of similar to 0.4%) of the rate coefficients compared to the Langevin rate constant k(L) over the collision-energy range considered.
Self-assembled core–polyethylene glycol–lipid shell nanoparticles demonstrate high stability in shear flow
Shen, Zhiqiang; Ye, Huilin L.; Kröger, Martin; et al. (2017)
Physical Chemistry Chemical Physics
Structural analysis of newly designed platinum compounds with interesting conductivity and optical properties
Finazzo, c.; Fontana, M.; Van Doorslaer, Sabine; et al. (2005)
Physical Chemistry Chemical Physics
Adsorption and surface mobility of cinchonidine on Pt(111) studied by STM
Arx, Matthias von; Wahl, Markus; Jung, Thomas A.; et al. (2005)
Physical Chemistry Chemical Physics
Magnetic deflection of neutral sodium-doped ammonia clusters
Barnes, Jonathan V.; Beck, Martin; Hartweg, Sebastian; et al. (2021)
Physical Chemistry Chemical Physics
We describe the setup and the performance of a new pulsed Stern–Gerlach deflector and present results for small sodium-doped ammonia clusters Na(NH3)n (n = 1–4) in a molecular beam. NaNH3 shows the expected deflection of a spin ½ system, while all lager clusters show much smaller deflections. Experimental deflection ratios are compared with the values calculated from molecular dynamics simulations. The comparison reveals that intracluster spin relaxation in NaNH3 takes place on a time scale significantly longer than 200 μs. Assuming that intracluster relaxation is the cause of the reduced deflection, relaxation times seem to be on the order of 200 μs for all larger clusters Na(NH3)n (n = 2–4). Our work is a first attempt to understand the magnetic properties of isolated, weakly-bound clusters with relevance to the variety of diamagnetic and paramagnetic species expected in solvated electron systems.

Publications 1 - 10 of 430

Journal: Physical Chemistry Chemical Physics

Abbreviation

Publisher

Journal Volumes

ISSN

Description

Filters

Search Results