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Akram Ibrahim Hijazi

Associate professor
Chemistry - Biochemistry department - Section I - Hadath
Speciality: Chemistry
Specific Speciality: Organo-metallic de catalyse

Publications 6 publications
Synthesis, characterization, and tuning of the liquid crystal properties of ionic materials based on the cyclic polyoxothiometalate [{Mo4O4S4(H2O)3(OH)2}2(P8W48O184)]36 Soft Matter 2015

A series of compounds resulting from the ionic association of a nanoscopic inorganic cluster of formula [K2NaxLiy{Mo4O4S4(OH)2(H2O)3}2(HzP8W48O184)](34xyz), 1, with several organic cations such as dimethyldioctadecylammonium DODA+, trimethylhexadecylammonium TMAC16 +, alkylmethylimidazoliums mimCn + (n ¼ 12–20) and alkyl-dimethylimidazoliums dmimCn + (n ¼ 12 and 16) was prepared and characterized in the solid state by FT-IR, EDX, Elemental analysis, TGA and solid state NMR. The solid state NMR experiments performed on 1H, 13C and 31P nuclei evidenced the interactions between the cations and 1 as well as the organization of the alkyl chains of the cations within the solid. Polarized optical microscopy, DSC and SA-XRD experiments implicated mesomorphic phases for DODA+ and mimCn + salts of 1. The crystallographic parameters were determined and demonstrated that the inter-lamellar spacing could be controlled upon changing the length of the alkyl chain, a very interesting result if we consider the huge size of the inorganic cluster 1 and the simple nature of the cations.

The antioxidant and anti-tumor activities of the Lebanese Centranthus Longiflorus L. World Journal of Pharmaceutical Sciences 2015

This study aimed to examine both the impact of growth period on the chemical composition and the in vitro anti-oxidant and anti-proliferative properties for Centranthus longiflorus. Aqueous and ethanolic extracts from leaves and stems, collected from two harvests, were tested to diagnose their different secondary metabolites content. This was conducted through classical phytochemical screening tests. In addition, a test for their antioxidant (DPPH and H2O2 radical scavenging) and for cell viability (Neutral red assay on HeLa cells), were conducted. The results have shown that both aqueous and ethanolic extracts from the different parts of the two C. longiflorus harvests contain alkaloid, coumarin, saponin, flavonoid, polyphenols, volatile oils and reducing sugars in different concentrations. Moreover, an antioxidant activity was observed by this plant where it inhibited the viability of HeLa cell line in a time-dependent (0–72 h) and dose-dependent (0–250 μM) manner. As such, the in vitro anti-oxidant and antiproliferative effects that were revealed from the two harvests of C. longiflorus reflect the significant potential use of this plant in the development of a new anti-cancer agent.

Hydrophobic Effect as a Driving Force for Host−Guest Chemistry of a Multi-Receptor Keplerate-Type Capsule J. Am. Chem. Soc. 2015, 137, 5845−5851 2015

Synthesis, Characterization and Study of Liquid Crystals Based on the Ionic Association of the Keplerate Anion [Mo132O372(CH3COO)30(H2O)72]42− and Imidazolium Cations Inorganics 2015

HEAVY METALS IN HUMAN BLOOD IN AL-NAHRAWAN CITY Int. J. Curr. Res. Chem. Pharma. Sci. 2015

Bis[(iminodiacetate)oxothiomolydate(V)] tetraphenylphosphonium hydrate and process for cultivation of Spirulina platensis cyanobacterium with the use thereof. Patent 2015