A novel pyrimidine derivative as a fluorescent chemosensor for highly selective detection of Aluminum (III) in aqueous media

作者：Suryawanshi Vishwas D; Gore Anil H; Dongare Pravin R; Anbhule Prashant V; Patil Shivajirao R; Kolekar Govind B^*

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2013, 114: 681-686.

DOI：10.1016/j.saa.2013.05.071

• Pyrimidine derivative
• Al3+ ion
• Fluorescence quenching
• Environmental analysis
• Aqueous media

An efficient fluorescent chemosensor Al3+ receptor based on pyrimidine derivative,2-amino-6-hydroxy-4-(4-N,N-dimethylaminophenyl)-pyrimidine-5-carbonitrile (DMAB), has been synthesized by three-component condensation of aromatic aldehyde, ethyl cyanoacetate and guanidine hydrochloride in ethanol under alkaline medium. High selectivity and sensitivity of DMAB towards Aluminum ion (Al3+) in water: ethanol and acetate buffer at pH 4.0 makes it suitable to detect Al3+ with steady-state UV-vis and fluorescence spectroscopy. Method shows good selectivity towards Al3+ over other coexisting metal ions tested, viz. Fe2+, Ni2+, Cu2+, Co2+, Pb2+, Sb3+, Na+, Ca2+, Mg2+, Zn2+, Hg2+, Ba2+, Cd2+ and K+. A good linearity between the Stern-Volmer plots of F-0/F versus concentration of Al3+ was observed over the range from 10 to 60 mu g mL(-1) with correlation coefficient of 0.991. The accuracy and reliability of the method were further confirmed by recovery studies via standard addition method with percent recoveries in the range of 101.03-103.44% and lowest detection limit (LOD = 7.35 mu g mL(-1)) for Al3+ was established. This method may offer a new cost-effective, rapid, and simple key to the inspection of Al3+ ions in water samples in the presence of a complex matrix and can be capable of evaluating the exceeding standard of Al3+ in environmental water samples. The probable mechanism for fluorescence quenching was also discussed.

• 出版日期2013-10