Abstract
A novel photochromic system of europium with nicotinic acid (HL) and 1,10-phenanthroline (phen) was studied. The color of the system turns from yellow to green with a broad absorption band appearing in the range 550–830 nm under the irradiation by a mercury lamp. The pH value of the system plays an important role in the photochromic behavior. It is observed that a higher pH value is favorable to photochromism. With electrospray ionization mass spectrometry (ESIMS), we probed the possible species present in the aqueous solution. It was concluded that the complex EuL3(phen)2 · H2O exists in the solution. To better understand its ESI mass spectrum, we give the possible fragmentation of EuL3(phen)2 · H2O.
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Zheng, X.J., Jin, L.P., Mei, Y.H. et al. Photochromism and Electrospray Mass Spectrum of the Ternary Europium System with Nicotinic Acid and 1,10-Phenanthroline. Journal of Solution Chemistry 30, 985–994 (2001). https://doi.org/10.1023/A:1013399226350
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DOI: https://doi.org/10.1023/A:1013399226350