کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
743696 | 894367 | 2012 | 7 صفحه PDF | دانلود رایگان |
The synthesis and spectroscopic studies of a thiacalix[4]arene-based sensor of 1,3-alternate-25,27-bis(2-aminoethoxy)-26,28-bis(2-methoxyethyl)-thiacalix[4]arene linked 4-chloro-7-nitrobenzofurazan (NBD-Cl) are described. The properties of the compound were evaluated and show that it is a colorimetric and fluorescence sensor for Ag+ and AcO−. The addition of Ag+ results in a red shift of the absorption spectrum of the sensor, which is clearly visible to the naked eye, accompanied by a strong quenching of the fluorescence. With the addition of AcO−, the fluorescence was severely quenched, and the absorbance increased significantly, with a new absorption band appearing at shorter wavelength. This demonstrated that the multifunctional sensing compound prepared from a novel thiacalix[4]arene was highly selective for AcO−.
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Journal: Sensors and Actuators B: Chemical - Volume 164, Issue 1, 31 March 2012, Pages 69–75