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Publication Citation: Quantitative Measurement of the Polydispersity in the Extent of Functionalization of Glass Forming Resorcinarenes

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Author(s): William E. Wallace III; Kathleen M. Flynn; Charles M. Guttman; David L. VanderHart; Vivek M. Prabhu; Anuja De Silva; Nelson Felix; Christopher K. Ober;
Title: Quantitative Measurement of the Polydispersity in the Extent of Functionalization of Glass Forming Resorcinarenes
Published: May 01, 2009
Abstract: The polydispersity in the degree of functionalization for two calix[4]resorcinarenes was determined by measuring their molecular mass distribution with matrix-assisted laser desorption/ionization time of flight mass spectrometry. A mathematical method for polydisperse materials is described that creates a calibration curve to correct the ion intensities in the mass spectrum to give a more reliable molecular mass distribution. Correction is required due to various sample preparation and instrumental effects that may produce a systematic bias on the number of oligomers measured. This method employs gravimetric mixtures of analytes with different degrees of functionalization. One calix[4]resorcinarene was found to give accurate molecular mass distributions with little correction, while another having a very similar molecular structure was found to exhibit strong over counting of oligomers with a high degree of functionalization.
Citation: Rapid Communications in Mass Spectrometry
Volume: 23
Pages: pp. 1957 - 1962
Keywords: glass; mass spectrometry; photolithography;
Research Areas: Polymers
PDF version: PDF Document Click here to retrieve PDF version of paper (698KB)