Anchoring of a nickel(II) Schiff base complex onto activated carbon mediated by cyanuric chloride

✍ Scribed by A.R. Silva; C. Freire; B. de Castro; M.M.A. Freitas; J.L. Figueiredo

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 274 KB
• Volume: 46
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/s1387-1811(01)00297-9

✦ Synopsis

The Schi base nickel complex functionalised with hydroxyl groups, N ; N H -ethylene-bis-(4-hydroxysalicyliminate)nickel(II), [Ni(4-HOsalen)], was anchored onto an air-oxidised activated carbon using cyanuric chloride (CC) as the linking agent. Complex anchoring was made in three consecutive steps: (i) oxidation of activated carbon with a mixture of N 2 and air (with 5% O 2 ); (ii) attachment of CC to the air-oxidised carbon surface functionalities, and (iii) reaction between the metal complex functionalised with hydroxyl groups and carbon-bound CC. The carbon-based materials were characterised by elemental analysis, surface techniques (scanning electron microscopy and X-ray photoelectron spectroscopy), X-ray diraction, nitrogen adsorption isotherms and thermal analysis (temperature-programmed desorption and thermogravimetry). Data from all these techniques provided evidence that the nickel complex was anchored onto the air-oxidised activated carbon via CC.