C2nD „n51 – 3... anions
نویسندگان
چکیده
Anion photoelectron spectra of the carbon monohydrides, C2nH 2 for n51 – 4 and C2nD 2 for n51 – 3, have been measured. The spectra were recorded at a wavelength of 266 nm ~4.657 eV! and yield electron affinities for each species. The spectra are vibrationally resolved, and some of the vibrational modes in the neutral C2nH~D! radicals are assigned. In addition, photoelectron angular distributions allow one to distinguish between photodetachment transitions to the S and P states of the neutrals. The spectra confirm previous work showing that C2H and C4H have S ground states, while C6H and C8H have P ground states. In addition, we observe the low-lying P or S excited states for all four radicals. The photoelectron angular distributions also serve as a probe of vibronic coupling between the S and P states. These effects are particularly prominent in the C2H 2 and C4H 2 spectra. © 1998 American Institute of Physics. @S0021-9606~98!01724-3#
منابع مشابه
Study of I-[CO2]n, Br-[CO2]n, and I-[N2O]n clustersby anion photoelectron spectroscopy
Photoelectron spectra of the I~CO2!n51–13, I ~N2O!n51–12, and Br ~CO2!n51–11 clusters are presented. The spectra provide information about the stepwise solvation of the bromide and iodide anions and about the size of the first solvation shells in these clusters. The data suggest that significantly different solute–solvent interactions exist in the three sets of clusters studied here. The X~CO2!...
متن کاملElectronic structure of titanium oxide clusters: TiOy „y51 – 3... and „TiO2...n „n51 – 4..
The electronic structure of two series of small titanium oxide clusters, TiOy (y51 – 3) and (TiO2)n (n51 – 4), is studied using anion photoelectron spectroscopy. Vibrationally resolved spectra are obtained for TiO and TiO2 . Six low-lying electronic states for TiO are observed with five of these excited states resulting from multielectron transitions in the photodetachment processes. TiO2 is fo...
متن کاملConsequences of a possible adiabatic transition between n51/3 and n51 quantum Hall states in a narrow wire
We consider the possibility of creating an adiabatic transition through a narrow neck, or point contact, between two different quantized Hall states that have the same number of edge modes, such as n51 and n 5 1 3. We apply both the composite-fermion and Luttinger-liquid formalism to analyze the transition. We suggest that using such adiabatic junctions one could build a dc step-up transformer,...
متن کاملNeutrophil infiltration, glial reaction, and neurological disease in transgenic mice expressing the chemokine N51/KC in oligodendrocytes.
Chemokines (pro-inflammatory chemoattractant cytokines) are expressed in pathological conditions of the central nervous system (CNS). Previous studies suggested that the CNS is relatively resistant to leukocyte diapedesis after chemokine injection, leaving their functional role unresolved. The CNS function of N51/KC, a neutrophil-selective chemokine, was addressed by expressing N51/KC under con...
متن کاملAnion photoelectron spectroscopy of I 2 À „ CO 2 ... n „ n Ä 1 – 8 ... clusters
We report the anion photoelectron spectra of I2 (CO2)n clusters (n51 – 8) measured at a photon energy of 4.661 eV. Assignment of the spectra is aided by electronic structure calculations on I2 (CO2). The experiment yields size-dependent vertical and adiabatic detachment energies for the formation of the ground state and low-lying valence-excited states of the neutral cluster. Vertical detachmen...
متن کامل