Schiff bases of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane and its silatranes: Synthesis and characterization

Abstract

This paper aims at the introduction of azomethine group by the condensation reaction of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane with different compounds containing carbonyl group such as 2'-hydroxyacetophenone, salicylaldehyde, pyrrole-2-carboxaldehyde, acetylacetone and ethyl acetoacetate. Further, transesterification reaction of these Schiff base modified silanes with triethanolamine as a tripodal ligand leads to the synthesis of corresponding silatranes 1-5 bearing Schiff base functionalized long chain in the axial position. All the synthesized compounds are characterized by spectroscopic methods, elemental analysis and mass spectrometry. The authentication of Schiff base modified silatranes is scrutinized by single X-ray crystal structure of silatrane 1. The thermal stability of the five silatranes is studied by thermo-gravimetric analysis (TGA).

Synthesis of MCM-41 Immobilized (Phenoxy)Imine Palladium(II) Complexes as Recyclable Catalysts in the Methoxycarbonylation of 1-Hexene

“…The structural characterization of the immobilized compounds was performed using FT-IR, TGA, TEM, SEM-EDX and XRD. The FT-IR bending vibrations between 1306 cm −1 and 1365 cm −1 were assigned to the Si-O-Si bonds of the MCM-41 support and established a successful formation of the immobilized ligands HL3 and HL4 [30]. FT-IR spectra were also useful in the determination of the coordination of HL3 and HL4 to give the respective palladium(II) complexes 3 and 4.…”

Effect of gas-chromatography column regeneration during the CHN/S analysis of copper-chromium disulfide

“…Nowadays the analysis for C, H, N, S contents is required for the study not only of organic compounds but also of various metal-organic complexes and sulfur-containing compounds [1][2][3][4][5][6][7][8][9][10]. Due to a wide range of promising physicochemical properties, these compounds are used as advanced energy [2,6], thermoelectric [11,12] and magnetic [13,16] materials.…”