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Identification of the D 3 h Isomer of Carbon Trioxide (CO 3 ) and Its Implications for Atmospheric Chemistry
Author(s) -
Jamieson Corey S.,
Mebel Alexander M.,
Kaiser Ralf I.
Publication year - 2006
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200600390
Subject(s) - isotopomers , matrix isolation , chemistry , molecule , kinetic isotope effect , excited state , carbon fibers , quenching (fluorescence) , mars exploration program , carbon monoxide , photochemistry , deuterium , astrobiology , atomic physics , organic chemistry , materials science , fluorescence , physics , composite number , composite material , catalysis , quantum mechanics
The CO 3 molecule is considered an important reaction intermediate in the atmospheres of Earth and Mars for quenching electronically excited oxygen atoms and in contributing to the anomalous 18 O isotope enrichment. The geometry of the CO 3 intermediate plays an important role in explaining these effects; however, only the cyclic ( C 2 v ) isomer has been experimentally confirmed so far. Here, we report on the first spectroscopic detection of the acyclic ( D 3h ) isomer of carbon trioxide ( 12 C 16 O 3 ) via its ν 1 and ν 2 vibrational modes centered around 1165 cm −1 under matrix isolation conditions; the identification of the 12 C 18 O 3 , 13 C 16 O 3 , 13 C 18 O 3 , 16 O 12 C 18 O 2 , and 18 O 12 C 16 O 2 isotopomers of the acyclic isomer confirms the assignments.