Preprint Article Version 1 This version not peer reviewed

Densities and Refractive Indices of Potassium Carbonate -Based Deep Eutectic Solvents with Dual Hydrogen Bond Donors at Several Temperatures (293.15 to 343.15 K)

Version 1 : Received: 19 May 2017 / Approved: 19 May 2017 / Online: 19 May 2017 (16:06:15 CEST)

How to cite: Ghaedi, H.; Ayoub, M.; Sufian, S.; Mohd Shariff, A.; Lal, B. Densities and Refractive Indices of Potassium Carbonate -Based Deep Eutectic Solvents with Dual Hydrogen Bond Donors at Several Temperatures (293.15 to 343.15 K). Preprints 2017, 2017050148 (doi: 10.20944/preprints201705.0148.v1). Ghaedi, H.; Ayoub, M.; Sufian, S.; Mohd Shariff, A.; Lal, B. Densities and Refractive Indices of Potassium Carbonate -Based Deep Eutectic Solvents with Dual Hydrogen Bond Donors at Several Temperatures (293.15 to 343.15 K). Preprints 2017, 2017050148 (doi: 10.20944/preprints201705.0148.v1).

Abstract

Deep eutectic solvents (DESs) are known as tunable solvents. It is possible to prepare ternary deep eutectic solvent (TDES) are used for desired purpose by selecting the suitable molar ratio and components of mixture. Therefore, four DESs and two TDESs were prepared in this work. DESs and TDESs were prepared with potassium carbonate (PC) as a hydrogen bond acceptor (HBA) and three hydrogen bond donors (HBDs) such as glycerol (GL), ethylene glycol (EG) and 2-amino-2methyl-1-3-propanediol (AMPD) known as a hindered amine (HA). Binary DESs were PC-GL with molar ratios 1:10 and 1:16 and PC-EG with the same molar ratios. TDES were prepared by adding AMPD in binary DESs such as PC-GL-AMPD 1:16:1 and PC-EG-AMPD 1:10:1. The experimental density and refractive index of all DESs and TDESs were measured at the temperature of 293.15 to 343.15 K with an interval of 5 K. The effect of temperature, molar ratio and alkyl chain length on the properties was investigated. The molar volumes and isobaric thermal expansion were calculated using experimental density data. The experimental refractive index data was used to derive the specific refraction, molar refraction, free molar volume, electronic polarization, polarizability constant and internal pressure at several temperatures.

Subject Areas

DES; TDES; salt; HBD; density; refractive index

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