Laboratorium voor Akoestiek en Thermische Fysica, Departement Natuurkunde en Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200D-bus 2416, B-3001 Leuven, Belgium.
J Chem Phys. 2011 Jul 14;135(2):024508. doi: 10.1063/1.3607237.
Dielectric constant measurements have been carried out in the one- and two-phase regions near the critical point of the polar + polar binary liquid mixture nitromethane + 3-pentanol. In the two-phase region, evidence for the |t|(2β) singularity in the coexistence-curve diameter has been detected, thus confirming the novel predictions of complete scaling theory for liquid-liquid criticality. In the one-phase region, an "unusual" negative sign for the amplitude of the |t|(1-α) singularity has been encountered for the first time in an upper critical solution temperature type of binary liquid mixture at atmospheric pressure. Mass density measurements have also been carried out to provide additional information related to such experimental finding, which entails an increase of the critical temperature T(c) under an electric field.
介电常数测量已经在极性+极性二元液体混合物硝基甲烷+3-戊醇的临界点附近的单相区和两相区进行了。在两相区，已经检测到共存曲线直径中 |t|(2β)奇点的证据，从而证实了液-液临界完整标度理论的新预测。在单相区，首次在大气压下的上临界溶液温度型二元液体混合物中遇到了 |t|(1-α)奇点振幅的“异常”负号。还进行了质量密度测量，以提供与这种实验发现相关的其他信息，这需要在电场下增加临界温度 T(c)。
