Dataset from the analysis of dielectric and calorimetric response of phosphonium ionic liquids with phosphate and phosphinate anions

This dataset contains raw dielectric and calorimetric data published in the article entitled “Effect of bulky anions on the liquid‑liquid phase transition in phosphonium ionic liquids: Ambient and high‑pressure dielectric studies” in Scientific reports (https://www.nature.com/articles/s41598-023-29518-8). The included data consists results collected for two quaternary phosphonium ionic liquids with hydrophobic [P666,14]+ cation and anions: bis(2-ethylhexyl) phosphate ([BEHP]-) and bis(2,4,4-trimethylpentyl) phosphinate ([BTMPP]−). Raw data correspond to figures published in the main article and supporting information file.