Research Article

Estimation of the Critical Temperatures of Some More Deep Eutectic Solvents from Their Surface Tensions

Table 1

The surface tension at 298.15 K and its temperature coefficient ; the molar masses and the density coefficients of of deep eutectic solvents; and the derived critical temperatures: according to (3), according to (4), from Mirza et al. [1], and from Haghbakhsh et al. [17].

HBAHBD (mN·m−1) (mN·m−1·K−1)Reference (g·mol−1)(g·cm−3) (g·cm−3·K−1)Reference (K) (K)(K) (K)

ChClEG 1 : 248.91–0.0932[4]263.81.13140.572[10]836669602,611602
Gly 1 : 258.05–0.1353[5]323.81.20510.532[7]832605681,681681
Fru 2 : 174.0–0.200[6]432.41.30811.179[11]869564757,903
Glu 2 : 171.71–0.0516[4]432.41.2671.000[11]1191887,887
Mea 1 : 749.18–0.0694[13]567.21.08430.73[13]1486790

DEANClEG 1 : 447.51–0.0956[4]402.01.11490.618[12]982651612,667
Gly 1 : 254.54–0.0888[5]337.91.18810.599[12]1158728641,696704

Pr4NBrEG 1 : 447.05–0.0877[7]514.51.15090.682[7]1068677642
Gly 1 : 353.12–0.0883[7]536.51.22140.664[7]1159720
TEG 1 : 346.57–0.0814[7]908.41.16810.700[7]1146701

Bu4NClEG 1 : 340.49–0.0817[8]464.11.04230.639[8]1002650
Gly 1 : 547.35–0.0700[8]738.41.15790.650[8]1312769
TEG 3 : 140.22–0.0849[8]920.01.01970.618[8]963635

Bu4NBrGly 1 : 436.57–0.1409[5]690.71.35370.6[5]609558
Mea 1 : 435.83–0.0392[13]566.71.07290.73[13]2072919
Asa 1 : 938.5–0.1150[14]1520.40.97950.584[14]720563
Gla 1 : 1037.6–0.1375[14]1793.80.97910.601[14]633518
Arg 1 : 640.4–0.0750[14]1367.71.02230.603[14]1044708

MePh4PBrEG 1 : 451.29–0.1056[9]605.51.25040.709[12]906642708,989
Gly 1 : 358.94–0.1259[9]633.51.31320.651[12]914631832,996802
Mea 1 : 850.27–0.0828[13]845.91.12090.81[13]1289724

BzPh3PBrGly 1 : 1653.24–0.1205[5]1857.71.25120.7[5]894613741

AllPh3PBrGly 1 : 1441.57–0.1409[5]1646.51.28050.7[5]671512739
DEG 1 : 449.37–0.0996[15]707.71.21600.74[16]980748898a
TEG 1 : 448.25–0.1326[15]883.91.21500.74[16]768581738a

aReference [15].