Products Cited in Publications Worldwide Core Differences: Examining Branched Versus Linear Substituents’ Influence on Tri(octyl)phosphonium-Based Ionic Liquid Physical Properties

Core Differences: Examining Branched Versus Linear Substituents’ Influence on Tri(octyl)phosphonium-Based Ionic Liquid Physical Properties

Mathias A. Perone; Rusty L. Blanski; Kellsie G. Knoerzer; Cassandra D. Alabada; Derek E. Planellas; Jacob C. Marcischak; Ashlee S. Quintana; Jerry A. Boatz; Kamran B. Ghiassi

DOI:

Abstract

During the investigation of room temperature (RTILs) produced from tri(2-ethylhexyl)phosphine, it was discovered that the common core tri(n-octyl)phosphine was also significantly underreported. This void in the literature prompted an investigation to explore the influence of branched versus linear substituents’ influence on physical properties. To facilitate a thorough structure-property relationship study, 28 were prepared from tri(n-octyl)phosphine to compare against their branched counterparts. Thermal behavior was investigated by utilizing visual melting point determination, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA), with emphasis placed on the examination of physical states, phase transitions (including solid-solid), and degradation. Remarkably, all materials produced here are (mp < 100°C), with 16 of the 28 being liquids at room temperature. Standard analytical methods were utilized to assess the physical properties of the compounds, namely density, viscosity, surface tension, and solubility/miscibility. Structure-property relationships were assessed, particularly focusing on the differences in physical properties between the tri(n-octyl)phosphine and tri(2-ethylhexyl)phosphine cores.

Keywords

Room temperature ; phosphonium cation ; structure-property relationship ; thermal analysis ; physical properties ; branching

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A38119818908-66-299% (stabilized with 1% K2CO3)

2-Ethylhexylbromide

110.0/1kg

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