Synthesis, characterization, and sorption properties of silica gel-immobilized pyrimidine derivative

Journal of Colloid and Interface Science
Mohamed E MahmoudAbdelrahman H Hegazi

Abstract

5-Benzylidene-2-thiobarbituric acid (BzTBA), a pyrimidine derivative, was used to modify the surface of silica gel-chloropropyltrimethoxysilane (Si-Cl) via chemical immobilization to produce a new pyrimidine silica phase (Si-BzTBA). Identification of the surface modification was characterized and performed on the basis of infrared as well as elemental analysis. Thermal desorption method was found to give 0.129-0.143 mmol g(-1) as surface coverage values. Metal sorption properties of Si-BzTBA were also studied and the evaluated results refer to the high metal sorption of Si-BzTBA for copper(II), mercury(II), cadmium(II), and lead(II) with the same order. These four Si-BzTBA-metal complexes were also synthesized and the stoichiometric ratios were identified as 1:1 except lead complex was found to give a 1:2 ratio. Electron impact-mass spectrometric analysis (EI-MS) with 70 eV ionization energy was used as a potential thermal method for the confirmation of surface modification of Si-BzTBA and its metal complexes based on fragmentation elucidation of thermally desorbed ion peaks. The EI-MS of Si-BzTBA was found to show several characteristic fragment ion peaks that are directly related to the chemical binding of BzTBA to SiCl phase...Continue Reading

References

Oct 9, 2002·Clinica Chimica Acta; International Journal of Clinical Chemistry·Antoine LaudatAnne-Marie Palluel
Jan 31, 2006·Nucleosides, Nucleotides & Nucleic Acids·Mamdouh S MasoudEkram A Khalil

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Citations

Mar 12, 2008·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Mohamed E MahmoudRabab R A Lashein
Nov 3, 2012·Journal of Colloid and Interface Science·Eduardo G VieiraLeonardo F Fraceto
Mar 14, 2007·Journal of Colloid and Interface Science·Antonio R CestariLuis E Almeida
Dec 23, 2014·Journal of Esthetic and Restorative Dentistry : Official Publication of the American Academy of Esthetic Dentistry ... [et Al.]·Serdar BağlarMehmet Mustafa Hamidi

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