An infrared study on Langmuir–Blodgett films of 14,15-bis(hydroxyimino)-13-thiaoctacosane |
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| Institution: | 1. TUBITAK-Marmara Research Centre, Materials and Chemical Technologies Research Institute, P.O. Box 21, 41470 Gebze, Kocaeli, Turkiye;2. Gebze Institute of Technology, Department of Chemistry, P.O. Box 141, 41400 Gebze, Kocaeli, Turkiye;3. University of Sheffield, Department of Physics & Astronomy, Sheffield, UK;4. University of Hacettepe, Faculty of Engineering, Department of Physics Engineering, Beytepe 06800, Ankara, Turkiye;1. Faculty of Foundry Engineering, AGH University of Science and Technology, 30-059 Krakow, Poland;2. Academic Centre for Materials and Nanotechnology, AGH University of Science and Technology, 30-059 Krakow, Poland;3. Department of Chemistry, Hankuk University of Foreign Studies, Yongin, Kyunggi-Do 449-791, Republic of Korea;1. Dipartimento di Scienze Fisiche e Chimiche, Università dell’Aquila, Via Vetoio 2, 67100, Coppito, L’Aquila, Italy;2. Sorbonne Universities, UPMC, Laboratoire de Réactivité de Surface UMR CNRS 7197, Tour 43-53, 3rd floor, 4 Pl. Jussieu, 75005, Paris, France;3. Service de Bioénergétique, Biologie Structurale et Mécanismes (SB2SM) CEA, iBiTec-S, Biochimie Biophysique et Biologie Structurale (B3S), I2BC, UMR 9198, F-91191 Gif-sur-Yvette, France;1. Istanbul University, Faculty of Science, Department of Physics, Vezneciler, 34134, Istanbul, Turkey;2. Istanbul Kultur University, Department of Physics, Atakoy Yerleskesi, 34156, Bakirkoy, Istanbul, Turkey;3. Oral Roberts University, Department of Chemistry and Biology, Tulsa, OK 74171, USA;4. Kao Specialties Americas, LLC, 243 Woodbine St., High Point, NC 27260, USA;5. Potsdam University, Department of Chemistry, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam (Golm), Germany;1. Department of Electrical and Electronic Engineering, School of Engineering, Chukyo University, Japan;2. A.M. Prokhorov General Physics Institute Russian Academy of Sciences, Vavilov str. 38, Moscow 119991, Russia |
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| Abstract: | The Langmuir–Blodgett (LB) films of 14,15-bis(hydroxyimino)-13-thiaoctacosane (TOC) on aluminium plated substrates were investigated using Fourier transform infrared (FTIR), grazing angle (GAIR) and horizontal attenuated total reflectance (HATR) techniques. The LB films of TOC can be transferred onto the solid substrate successfully. The molecular structure of LB films was analysis by comparing the GAIR and HTAR spectra. The intense bands at 2848 and 2918 cm−1 are assigned to symmetric νs(CH2) and asymmetric νa(CH2) stretching vibrations of methylene groups. These peaks suggest that the alkyl chains in TOC are nearly in all-trans conformational state. The presence in the infrared spectra of several bands due to the methylene wagging and twisting modes and of the splitting of the bands due to the methylene scissoring mode at 1467 and 1459 cm−1 and the CH2 rocking mode at 720 and 731 cm−1 also indicates that in films of TOC alkyl chains are in the all-trans conformation and packed in either an orthorhombic or a monoclinic structure with an orthorhombic subcell containing two mutually orthogonal molecules. Another conclusion presented in this paper that the alkyl chain tilt, which is the angle between the axis, which bisects the C–C bonds and the surface normal, was quite large by comparing the GAIR and HATR spectra. |
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