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

Substance: nitrate anion				Other Names: nitrate

Formula: NO3-						CAS-No.: 14797-55-8

Study: photodecoposition study, quantum yields, decadic absorption coefficient


Authors: P. Warneck, C. Wurzinger

Title: Product quantum yields for the 305-nm photodecomposition of NO3- in aqueous solution

Journal/Source: J. Phys. Chem., 92 (22), 6278-6283, (1988); DOI: 10.1021/j100333a022


Data:  

Energy/Wavelength range: 305 nm

Resolution: 

Temperature: 295 K

Temperature dependence: no

Pressure/Concentration: 

Phase: aqueous solution

pH:


Comments: The quantum yields for the two main processes:
1.	NO3- + hv --> NO2- + O
2.	NO3- + H(+) + hv --> NO2 + OH
in dilute, air-saturated solutions of sodium nitrate were determined. The quantum yields found were Phi(O) = (1.1 ± 0.1) x 10-3 and
Phi(OH) = (9.2 ± 0.4) x 10-3. The decadic absorption coefficient for NO3- at 305 nm is about 7 cm-1 M-1.


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