Preparation of Biopolymer Membranes Based on Magnesium Perchlorate and I-Carrageenan
Shanmuga Priya S, et al. Ionics, 2018, 24, 3861-3875.
Biopolymer membranes based on magnesium perchlorate [Mg(ClO4)2] and I-carrageenan can be prepared by solution casting technology. The I-carrageenan film containing 0.6 wt% magnesium perchlorate showed a conductivity of 2.18 × 10^-3 S/cm, while the pure I-carrageenan film had a conductivity of 5.90 × 10^-5 S/cm. The biodegradable polymer complex of I-carrageenan with Mg(ClO4)2 salt is an efficient electrolyte for battery applications.
Preparation process of Mg(ClO4)2-based biopolymer membrane
· I-carrageenan polymer and magnesium perchlorate salt are used as raw materials for the synthesis of polymer salt complex, and double-distilled water has been used as a solvent.
· Different wt% of magnesium perchlorate (0.3, 0.4, 0.5, 0.6, 0.7) is added to I-carrageenan. Using magnetic stirrer, the solution is stirred continuously to get homogenous solution.
· The solution is poured into petri dishes, and it is kept at 50 °C in vacuum oven for 2 days to evaporate the solvent. The samples are characterized using different techniques.
Magnesium Perchlorate as An Effective Catalyst for The Synthesis of Imines and Phenylhydrazones
Chakraborti, Asit K.,et al. Tetrahedron letters, 2004, 45, (41), 7641-7644.
Magnesium perchlorate [Mg(ClO4)2] is an effective catalyst for the synthesis of imines and phenylhydrazones by the reaction of carbonyl compounds with amines and phenylhydrazine. The advantages of using Mg(ClO4)2 in the reaction process include high yields, mild reaction conditions, and the use of catalytic amounts.
Typical procedure for imine formation
· 4-Methoxybenzaldehyde (1.36 g, 10mmol) was treated with 4-nitroaniline (1.38 g, 10mmol) in DCE (10mL) at rt for 8 h (GC-MS) with magnetic stirring in the presence of Mg(ClO4)2 (0.1 g, 0.5mmol, 5mol%). The reaction mixture was diluted with DCE (10mL), filtered through a bed of Na2SO4, and concentrated to afford the desired product (2.43 g, 95%) .
· To establish the scope and limitations of Mg(ClO4)2 as a catalyst for imine formation, structurally diverse carbonyl compounds were treated with various amines such as aniline (1), 4-methoxyaniline (2), 4-hydroxyaniline (3), 4-methylaniline (4), 4-chloroaniline (5), 4-nitroaniline (6), and benzylamine (7) under the catalytic influence of Mg(ClO4)2.
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