Binary Systems of Some Carboxylic Acids. I. Systems Containing Benzoic Acid or a Substituted Benzoic Acid as One of the Components

Abstract

Properties and applications of intrinsic equations, that is, equations derived without reference to coordinate axes, are described, with particular attention to their usefulness in the analytical treatment of multicomponent systems. Equations of this type may be derived directly in terms of composition without considering geometric relations, and may be applied to multicomponent systems without the necessity of thinking in terms of hyperspace. Specific applications discussed are conversion of compositions from one system of components to another, the classification of compositions with reference to the individual systems in which they lie, and the estimation of the proportions of phases at an invariant point.A system of n components within an Ar-component system is defined by Nn intrinsic equations. It is suggested that when the necessary number of intrinsic equations is large, parametric equations may be employed more conveniently. The application of equations of the latter type will be considered in another paper (in preparation). REFERENCES(1)

Dynamic Nuclear Polarization using Photoexcited Triplet Electron Spins in Eutectic Mixtures

“…The samples are prepared by mixing benzoic acid- d 6 and one of the target molecules at above the melting points in a 1:1 molar ratio. From the phase diagrams for the binary mixtures, the samples are known to be eutectic mixtures. , We also demonstrate the enhancement of polarization of 13 C in those molecules. We have succeeded in achieving room-temperature hyperpolarization of these target molecules in the eutectic mixtures by Triplet-DNP using pentacene.…”