Urea and thiourea based efficient colorimetric sensors for oxyanions

Amilan Jose, D. ; Krishna Kumar, D. ; Ganguly, Bishwajit ; Das, Amitava (2005) Urea and thiourea based efficient colorimetric sensors for oxyanions Tetrahedron Letters, 46 (32). pp. 5343-5346. ISSN 0040-4039

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.tetlet.2005.06.011


Urea and thiourea based receptors 1 and 2 bind H2PO4-, OH-, CH3CO2-, and PhCO2- ions in an acetonitrile/DMSO (9:1, v/v) medium. Binding of these anions causes an appreciable change in the visible region of the spectrum, which can be detected by the naked eye. The affinity constant for H2PO4- is higher by about an order of magnitude as compared to the other oxyanions mentioned above. Ab initio calculations predicted tweezer-like binding modes for receptors 1 and 2 with these anions and a higher affinity toward H2PO4- was predicted in acetonitrile.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Oxyanions; Sensor; Urea and Thiourea Derivatives; Naked Eye Detection; Ab Initio Calculation
ID Code:59920
Deposited On:07 Sep 2011 14:18
Last Modified:07 Sep 2011 14:18

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