The short-time details of rotational diffusion in chloroform |
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| Affiliation: | 1. Department of Mechanical & Manufacturing Engineering, University of Calgary, ICT 402, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada;2. Department of Civil Engineering, University of Calgary, ENF 262, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada;3. Stantec, 200-325 25 Street SE, Calgary, AB T2A 7H8, Canada;1. Research Institute for Physical Chemical Problems of the Belarusian State University, 14 Leningradskaya Street, Minsk, 220030, Belarus;2. Educational-scientific-production Republican Unitary Enterprise "UNITEHPROM BSU", 1 Kurchatova, Minsk, 220045, Belarus;1. School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, China;2. The Second Clinical Medical College, Lanzhou University, Lanzhou 730000, Gansu Province, China;3. Key Laboratory of Evidence-Based Medicine and Knowledge Translation of Gansu Province, Lanzhou 730000, Gansu Province, China;1. Crop, Soil, and Environmental Science Department, Alabama Cooperative Extension System - Auburn University, Auburn, AL 36830, USA;2. Institute of Agricultural and Technological Sciences, Federal University of Rondonópolis, 78736-900 Rondonópolis, MT, Brazil;1. Indian Forest Service, India;2. University of Illinois at Urbana Champaign, Department of Electrical & Computer Engineering, United States |
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| Abstract: | Far i.r. absorption spectra of chloroform, and chloroform dissolved in cyclohexane have been measured. The band shapes are fitted using a statistical model of Mori containing three phenomenological parameters. Analytical rotational velocity correlation functions and memory functions Km(t) have been evaluated and their use in interpreting the molecular dynamics of the system discussed. The degree of rotational freedom of chloroform molecules is found to be less in solutions of high cyclohexane concentrations, a result attributed to the greater asymmetry of cyclohexane compared with chloroform. |
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