Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Behaviour of Ternary Mixtures of Hydrogen Bond Acceptors and Donors in Terms of Band Gap Energies

Version 1 : Received: 10 June 2021 / Approved: 11 June 2021 / Online: 11 June 2021 (08:52:30 CEST)

How to cite: Mannu, A.; Cardano, F.; Baldino, S.; Fin, A. Behaviour of Ternary Mixtures of Hydrogen Bond Acceptors and Donors in Terms of Band Gap Energies. Preprints 2021, 2021060306 (doi: 10.20944/preprints202106.0306.v1). Mannu, A.; Cardano, F.; Baldino, S.; Fin, A. Behaviour of Ternary Mixtures of Hydrogen Bond Acceptors and Donors in Terms of Band Gap Energies. Preprints 2021, 2021060306 (doi: 10.20944/preprints202106.0306.v1).

Abstract

Three ternary mixtures composed by choline chloride (ChCl), ethylene glycol (EG) and a second hydrogen bond donor (HBD) as ethanol (A), 2-propanol (B), and glycerol (C) were studied in terms of composition related to the band gap energy (BGE). A Design of Experiments (DoE) approach, and in particular a Simple Lattice three-components design, was employed for determining the variation of the BGE upon the composition of each system. UV-VIS analysis and subsequent Tauc plot methodology provided the data requested from the DoE and multivariate statistical analysis revealed a drop of the BGE in correspondence to specific binary compositions for systems A and B. In particular, a BGE of 3.85 eV was registered for the mixtures ChCl/EtOH (1:1), and ChCl/2-propanol (1:1), which represents one of the lowest values ever observed for these systems.

Subject Areas

eutectic mixtures; hydrogen bond acceptor; hydrogen bond donor; design of experiments; Tauc plot; band gap energy

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