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ERIC Number: EJ936769
Record Type: Journal
Publication Date: 2011-May
Pages: 5
Abstractor: As Provided
Reference Count: 42
ISBN: N/A
ISSN: ISSN-0021-9584
Determination of the Solubility Limit of Tris(dibenzylideneacetone) Dipalladium(0) in Tetrahydrofuran/Water Mixtures
Franzen, Stefan
Journal of Chemical Education, v88 n5 p619-623 May 2011
Determination of the solubility limit of a strongly colored organometallic reagent in a mixed-solvent system provides an example of quantitative solubility measurement appropriate to understand polymer, nanoparticle, and other macromolecular aggregation processes. The specific example chosen involves a solution of tris(dibenzylideneacetone) dipalladium(0), Pd[subscript 2](dba)[subscript 3], in THF/H[subscript 2]O mixtures, which has the desired properties of high absorption in the visible range ([lambda][subscript max] = 528 nm) and significant difference in solubility in the two solvents THF and H[subscript 2]O. Pd[subscript 2](dba)[subscript 3] is readily available, safe, and commonly used in nanoparticle syntheses. The application of Flory-Huggins theory permits the fit of a quantitative model to data obtained from a straightforward laboratory experiment that can be conducted in less than 3 h. The absorbance of this compound is easily measured by UV-vis absorption spectroscopy. The application of the Beer-Lambert law to the data in this experiment is a useful exercise for students because the absorbances span three orders of magnitude. (Contains 3 figures.)
Division of Chemical Education, Inc and ACS Publications Division of the American Chemical Society. 1155 Sixteenth Street NW, Washington, DC 20036. Tel: 800-227-5558; Tel: 202-872-4600; e-mail: eic@jce.acs.org; Web site: http://pubs.acs.org/jchemeduc
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A