science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: 1,2,3,4-tetrachlorodibenzo-p-dioxin Other Names: 1,2,3,4-TCDD Formula: C12H4O2Cl4 CAS-No.: 30746-58-8 Study: UV photodissociation, quantum yields, absorption spectra Authors: M. Koshioka, M. Ishizaka, T. Yamada, J. Kanazawa, T. Murai Title: Quantum yields of the photodegradation of 1,2,3,4-, 1,3,6,8-, and 2,3,7,8-tetrachlorodibenzo-p-dioxins and their half-life periods Journal/Source: J. Pesticide Sci., 15, 39-45, (1990) Data: table, diagram Energy/Wavelength range: 297.5 - 370.0 nm Resolution: Temperature: Temperature dependence: Pressure/Concentration: Phase: solution (dioxane) pH: Comments: The quantum yields for direct photodegradation of these TCDDs were 1.009 x 10-3, 2.798 x 10-3, and 1.990 x 10-2 mol einstein-1 at 313 nm. However, the quantum yields of these TCCDs at wavelengths of the maximal photodegradation peak at more than 295 nm were 2.133 x 10-3, 3.020 x 10-3, and 3.283 x 10-2, respectively. Author to whom correspondence should be addressed: (e-mail address):