science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: heptafluorobutyraldehyde Other Names: Formula: C3F7CHO CAS-No.: 375-02-0 Study: UV and IR absorption cross sections Authors: Y. Hashikawa, M. Kawasaki, R.L. Waterland, M.D. Hurley, J.C. Ball, T.J. Wallington, M.P. Sulbaeck Andersen, O.J. Nielsen Title: Gas phase UV and IR absorption spectra of CxF2x+1CHO (x = 1-4) Journal/Source: J. Fluorine Chem., 125, 1925-1932, (2004); http://dx.doi.org/10.1016/j.jfluchem.2004.07.006 Data: table, diagram Energy/Wavelength range: 200 - 500 nm Resolution: 1 nm Temperature: Temperature dependence: Pressure/Concentration: Phase: gas pH: Comments: CxF2x+1CHO (x = 1-4) have broad UV absorption features centered at 300-310 nm. The maximum absorption cross-section increases significantly and shifts slightly to the red with increased length of the CxF2x+1 group: CF3CHO, 3.10 x 10-20 (300 nm); C2F5CHO, 6.25 x 10-20 (308 nm); C3F7CHO, 8.96 x 10-20 (309 nm); and C4F9CHO, 10.9 x 10-20 (309 nm). Author to whom correspondence should be addressed: (e-mail address):