title: Iodine derivatives of chemically modified gum Arabic microspheres.
abstract: Acetylated gum Arabic (AGA) derivatives with different degrees of substitution (DS 0.97-2.74) were synthesized using acetyl chloride and a base under varying reaction conditions. The AGA derivatives were obtained in the form of microspheres and thereafter stable iodine products were prepared by doping the microspheres with an iodinating agent, iodine monochloride (ICl). The reaction between electrophilic iodine and polar carbonyl groups was studied by FT-IR, (1)H-NMR, and UV-VIS spectroscopies. The products were also characterized by DSC, TGA and SEM studies. The incorporated iodine was released in aqueous medium as iodide ions (I(-)). A reaction scheme has been proposed for the iodination and de-iodination of the gum derivatives. This work suggests that the iodine derivatives of modified gum Arabic could be used as a source of iodide ions which is the nutritional form of iodine.
authors.affiliation: Department of Chemistry, Jamia Millia Islamia University, New Delhi 110025, India. Electronic address: alishowkat443@gmail.com.
authors.forename: Showkat A
authors.initials: SA
authors.lastname: Ganie
authors.affiliation: Department of Chemistry, Jamia Millia Islamia University, New Delhi 110025, India. Electronic address: akbaraliarmaan@gmail.com.
authors.forename: Akbar
authors.initials: A
authors.lastname: Ali
authors.affiliation: Department of Chemistry, Jamia Millia Islamia University, New Delhi 110025, India. Electronic address: nasrinmaz@gmail.com.
authors.forename: Nasreen
authors.initials: N
authors.lastname: Mazumdar
mesh_terms: D000107:Acetylation; D002152:Calorimetry, Differential Scanning; D006170:Gum Arabic / Q000737:chemistry*; D054879:Halogenation; D007455:Iodine / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008863:Microspheres; D066244:Proton Magnetic Resonance Spectroscopy; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D013818:Thermogravimetry
chemical_list: D006170:Gum Arabic; D007455:Iodine
keywords: Chemical modification of gum; Gum Arabic; Gum Derivatives; Iodine Release; Natural polymer–iodine complex; Nutritional iodine