Catalytic Performance and Electrophoretic Behavior of an Yttrium-Organic Framework Based on a Tricarboxylic Asymmetric Alkyne.

A new Y-based metal-organic framework (MOF) with a chemical formula of {[YL(DMF)]·(DMF)} {HL = 5-[(4-carboxyphenyl)ethynyl] isophthalic acid; DMF = -dimethylformamide} has been prepared by a solvothermal route. Structural characterization reveals that this novel material is a three-dimensional MOF in which the coordination of the tritopic ligand to Y(III) metal ions leads to an intercrossing channel system extending over three dimensions. This material has proven to be a very efficient catalyst in the cyanosilylation of carbonyls, ranking second in catalytic activity among the reported rare earth metal-based MOFs described so far but with the lowest required catalyst loading.

Nanoemulsion stability: experimental evaluation of the flocculation rate from turbidity measurements.

The coalescence of liquid drops induces a higher level of complexity compared to the classical studies about the aggregation of solid spheres. Yet, it is commonly believed that most findings on solid dispersions are directly applicable to liquid mixtures. Here, the state of the art in the evaluation of the flocculation rate of these two systems is reviewed.

Carboxylated core-shell particles: II. Experimental and theoretical comparison of salt-induced swelling.

In a previous work [1] we showed that the swelling behavior of carboxylated core-shell particles (PS-PC) can be modified using a specific sample preparation route or favoring the hydrophobic attractive interaction by other way, i.e. controlling the temperature.

Carboxylated core-shell particles: I. A system showing hindered swelling behavior.

We study the swelling behavior of carboxylated core-shell particles. It is well-known that these particles swell with increasing pH due to the electrostatic repulsion between carboxylate groups. Our results reveal that the swelling behavior is affected by the preparation method.

[Knowledge and attitudes of the population about the living wills].

Objective: To evaluate knowledge of living wills and attitudes to these documents in the populations of two basic health areas in Toledo (Spain).

Method: We performed a descriptive, cross-sectional study in primary care centers. Participants consisted of the populations of two basic health areas selected by systematic stratified sampling.