The polarized absorption spectrum of 5-methyl indole in polyethylene and polyvinylalcohol films |
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| Affiliation: | 1. Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, United States;2. School of Resource and Environmental Sciences, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, No. 129 Luoyu Road, Wuhan 430079, PR China;1. Environmental Biotechnology Laboratory, Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur (IIT J), Jodhpur, Rajasthan 342037, India;2. Department of Mechanical Engineering, Indian Institute of Technology Jodhpur (IIT J), Jodhpur, Rajasthan 342037, India;1. State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology. No 73 Huanghe Road, Nangang District, Harbin 150090, China;2. Department of Civil and Environmental Engineering, Penn State University, 212 Sackett Building, University Park, PA, 16802, USA;1. Department of Environmental and Sustainable Engineering, University at Albany, State University of New York, 1400 Washington Avenue, Albany, NY 12222, United States;2. National Bioenergy Center, National Renewable Energy Laboratory, Golden, CO 80401, United States;3. Department of Civil and Environmental Engineering, The Pennsylvania State University, 231Q Sackett Building, University Park, PA 16802, United States |
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| Abstract: | The stretched film technique has been used to resolve the two overlapping 1La and 1Lb transitions of indole. 5-Methyl indole was studied as a model compound in two polymer matrices, polyethylene (PE) and polyvinylalcohol (PVA). The directions of the transition moments with respect to the long molecular axis are found to be in PE − 10° and +22° for 1La and 1Lb, respectively. These angles are found to be −25° and +29° in PVA. 1La has two prominent vibrations in PE at 2040 and 2895 cm−1 from the origin. 1Lb has four prominent vibrations in PE at 761, 1308, 1937 and 3196 cm−1 from the origin. In PVA, 1La has two prominent vibrations at 2149 and 2874 cm−1 from the origin and 1Lb has four prominent vibrations at 1049, 1352, 2229 and 3196 cm−1 from the origin. |
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