science-softCon uv/vis+ spectra database;		www.photochemistry.org; (C) science-softCon 2019

Substance: 3,3,3-trifluoropropion aldehyde		Other Names: 3,3,3-trifluoropropanal

Formula: C3H3F3O; CF3CH2CHO				CAS-No.: 460-40-2

Study: UV absorption spectra, photolysis, quantum yields


Authors: M. Antiñolo, E. Jiménez, J. Albaladejo 

Title: UV absorption cross sections between 230 and 350 nm and pressure dependence of the photolysis quantum yield at 308 nm of CF3CH2CHO

Journal/Source: Phys. Chem. Chem. Phys., 13, 15936-15946, (2011); DOI: 10.1039/C1CP21368G


Data: table, diagram

Energy/Wavelength range: 230 - 350 nm

Resolution: 

Temperature: 269 K; 273 K; 283 K; 298 K; 308 K; 323 K

Temperature dependence: yes

Pressure/Concentration: 

Phase: gas

pH:


Comments: Ultraviolet (UV) absorption cross sections of CF3CH2CHO were determined between 230 and 350 nm by gas-phase UV spectroscopy.
The forbidden n --> pi* transition was characterized as a function of temperature (269-323 K).
Photolysis quantum yields of CF3CH2CHO at 308 nm, Phi(lambda)=308nm, were measured as a function of pressure (25-760 Torr of synthetic air). 
The pressure dependence of Phi(lambda)=308nm can be expressed as the following Stern-Volmer equation: 
1/Phi(lambda=308nm) = (4.65 ± 0.56) + (1.51 ± 0.04) × 10-18 [M] ([M] in molecule cm-3). 

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