Sunlight-Initiated Photochemistry: Excited Vibrational States of Atmospheric Chromophores

Table 1

Organic acids and barriers for their chemistry.

Compound	Chemical; formula	Lowest energy barrier for reaction (kcal/mol)	Reaction products	OH quanta exceeding barrier	Reference
Sulfuric acid	H2SO4	32–40	SO3, H2O		[7, 151, 153]
Nitric acid	HNO3	47.7	NO2, OH		[57]
Pernitric acid	HO2NO2	21.2	HO2, NO2		[30]
Formic acid	HCOOH	41.5, 63.0	CO, H2O		[154], [150]
Glycolic acid	OHCH2COOH	50.9	H2CO, CO, H2O		[149]
Lactic acid	OHCHCH3COOH	47.4	HCOCH3, CO, H2O		[149]
Malonic acid	HOOCCH2COOH	27.6	H2CC(OH)2, CO2		[16]
Acetic acid	CH3COOH	67.01, 71.5	CH4, CO2		[155], [152]
Trifluoroacetic acid	CF3COOH	50.3	CF2CO2, HF		[14]