Wei Gao, Yutao Yang, F. Huo
Mar 31, 2014
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0
Influential Citations
41
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Journal
Sensors and Actuators B-chemical
Abstract
Abstract Two new salicylaldehydes derivatives, 5-fluoro-2-hydroxybenzaldehyde and 9-formyl-8-hydroxyjulolidine, were reacted with rhodamine hydrazine. The products were characterized by electrospray ionization mass spectrometry, nuclear magnetic resonance spectroscopy and X-ray single crystal diffraction. The optical properties of the compounds were investigated in a methanol–4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid solution. 5-Fluoro-2-hydroxybenzaldehyde rhodamine hydrazone (compound 1 ) was selective toward Cu 2+ as shown by a colorless to yellow color change. This was characterized by UV–vis spectroscopy and can be used for the visual detection of Cu 2+ . The selectivity of 9-formyl-8-hydroxyjulolidine rhodamine hydrazone (compound 2 ) toward Cu 2+ was determined by changes in UV–vis and emission spectra. The results show that compound 2 as a fluorescence probe is more sensitive than compound 1 as a UV–vis probe. Furthermore, compound 2 can be used for bioimaging.