Contrasting melting behavior of zinc stearate and zinc oleate.
The influence of a double bond in the middle of an otherwise flexible hydrocarbon chain on the melting of such assemblies has been investigated by comparing the melting behavior of zinc stearate and zinc oleate. By monitoring features in the infrared spectra that are characteristic of the global conformation of the hydrocarbon chain, it is shown that the double bond effectively decouples the thermal evolution of conformational disorder in the chain segments on either side of the double bond and the melting of each of these segments in the assembly occurs as independent events.
Solid State and Structural Chemistry Unit and Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India.
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Barman
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Vasudevan
D002152:Calorimetry, Differential Scanning; D019301:Oleic Acid / Q000737:chemistry*; D013229:Stearic Acids / Q000737:chemistry*; D014961:X-Ray Diffraction
D013229:Stearic Acids; D019301:Oleic Acid; C031183:stearic acid