Adsorption of isoniazid onto sepiolite-palygorskite group of clays: An IR study

作者：Akyuz Sevim^*; Akyuz Tanil; Akalin Elif

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2010, 75(4): 1304-1307.

DOI：10.1016/j.saa.2009.12.069

• Adsorption
• Clays
• IR spectroscopy
• Isoniazid
• Loughlinite
• Palygorskite
• Sepiolite

The adsorption of isoniazid (INH) on sepiolite, loughlinite (natural Na-sepiolite) and palygorskite from Anatolia was investigated by FT-IR spectroscopy. Experimental results indicated that INH molecules, adsorbed on sepiolite-palygorskite group of clays, are coordinated to surface hydroxyls by H-bonding interaction through the pyridine ring nitrogen lone pairs. Moreover, some of the adsorbed INH molecules may enter the interior channels of the sepiolite-palygorskite structure and involve H-bonding interaction with zeolitic water. Some intensity and frequency changes in the OH stretching band of surface hydroxyls (Si-OH) of the INH-treated sepiolite and loughlinite were observed. However, this band is found to be less affected by the adsorption of isoniazid in the case of palygorskite, probably because the surface Si-OH groups in palygorskite appear to be less abundant than in sepiolite or loughlinite.

• 出版日期2010-4