TY - JOUR
T1 - Photofragment Spectroscopy of FeCH2+, CoCH2+, and NiCH2+ near the M+-CH2 Dissociation Threshold
AU - Husband, John
AU - Aguirre, Fernando
AU - Thompson, Christopher J.
AU - Laperle, Christopher M.
AU - Metz, Ricardo B.
PY - 2000/3/16
Y1 - 2000/3/16
N2 - Photofragment spectra of jet-cooled MCH2+ (M = Fe, Co, Ni) have been measured. Our investigation of NiCH2+ represents the first reported spectroscopic study of this molecule. A spectroscopic threshold is observed for each of the three systems. In addition to imposing strict upper limits on the M+-CH2 bond strengths, these results further the discussion concerning the interpretation of spectroscopic thresholds as thermodynamic limits. The measured upper limits are: D○0(Fe+-CH2) ≤ 342 ± 2 kJ/mol, D○0(Co+-CH2) ≤ 331 ± 2 kJ/mol, and D○0(Ni+-CH2) ≤ 295 ± 5 kJ/mol. Three distinct, 2-nm-wide peaks are observed in the photofragment spectrum of CoCH2+, but the spectra lack sharp structure above threshold.
AB - Photofragment spectra of jet-cooled MCH2+ (M = Fe, Co, Ni) have been measured. Our investigation of NiCH2+ represents the first reported spectroscopic study of this molecule. A spectroscopic threshold is observed for each of the three systems. In addition to imposing strict upper limits on the M+-CH2 bond strengths, these results further the discussion concerning the interpretation of spectroscopic thresholds as thermodynamic limits. The measured upper limits are: D○0(Fe+-CH2) ≤ 342 ± 2 kJ/mol, D○0(Co+-CH2) ≤ 331 ± 2 kJ/mol, and D○0(Ni+-CH2) ≤ 295 ± 5 kJ/mol. Three distinct, 2-nm-wide peaks are observed in the photofragment spectrum of CoCH2+, but the spectra lack sharp structure above threshold.
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U2 - 10.1021/jp993652m
DO - 10.1021/jp993652m
M3 - Article
AN - SCOPUS:0034673481
SN - 1089-5639
VL - 104
SP - 2020
EP - 2024
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
IS - 10
ER -