Multicomponent Interdiffusion and Self-Diffusion of the Cationic Poly{[9,9-bis(6 '-N,N,N-trimethylammonium)hexyl]fluorene-phenylene} Dibromide in a Dimethyl Sulfoxide plus Water Solution

Summary, in English

The diffusion behavior of the conjugated polyelectrolyte poly{[9,9-bis(6'-N,N,N-trimethylammonium)hexyl]fluorene-phenylene) bromide (HTMA-PFP) with different molecular weights has been studied in dimethyl sulfoxide (DMSO) + water solutions. Samples of HTMA-PFP with various molecular weights were obtained by synthesis of poly[9,9-bis(6'-bromohexyl)fluorene-phenylene] via a Suzuki coupling reaction, characterized by size exclusion chromatography (SEC), and quaternized with trimethylamine. Multicomponent chemical interdiffusion coefficients (mutual diffusion coefficients) were determined for solutions of HTMA-PFP and DMSO in water using the Taylor dispersion method. The results suggest specific interactions between the DMSO and the polymer. In addition, these systems were studied by pulse-field gradient nuclear magnetic resonance spectroscopy (PFG-NMR), and the corresponding self-diffusion coefficients were obtained. These were modeled using the Kirkwood-Riseman model, and a good fit to the observed behavior was obtained using literature data for molecular dimensions.

• Author: Maria Monteserin; Maria J. Tapia; Ana C. F. Ribeiro; Cecilia I. A. V. Santos; Artur J. M. Valente; Hugh D. Burrows; Ricardo Mallavia; Markus Nilsson; Olle Söderman
• Department/s: Physical Chemistry
• Publishing year: 2010
• Language: English
• Pages: 1860-1866
• Publication/Series: Journal of Chemical and Engineering Data
• Volume: 55
• Issue: 5
• Links: http://dx.doi.org/10.1021/je900875w
• Document type: Journal article
• Publisher: The American Chemical Society (ACS)
• Topic: Physical Chemistry
• Status: Published
• ISBN/ISSN/Other: ISSN: 1520-5134