Open AccessMorphological Behavior of DPPC-DMPC Two-dimensional Mixed Monolayer on Water Surface by Dropping Method
Author(s) -
Yuta Watanabe,
Daiki Uchida,
Honoka Akatsuka,
Atsuo Yoshino,
Keijiro Taga,
Yasushi Yamämoto,
Zameer Shervani,
Masato Yamamoto
Publication year - 2022
Publication title -
european journal of advanced chemistry research
Language(s) - English
Resource type - Journals
ISSN - 2684-4478
DOI - 10.24018/ejchem.2022.3.1.79
Subject(s) - monolayer , chemistry , alkyl , crystallography , molecule , brewster's angle , surface tension , stereochemistry , organic chemistry , biochemistry , physics , quantum mechanics , brewster , optics
We have investigated the morphology of dipalmitoyl phosphatidyl choline (DPPC)-dimyristoyl PC (DMPC) mixed monolayer formed on the water surface by the dropping method using surface tension measurement (STm), Brewster angle microscopy (BAM), and infrared external reflection spectroscopy (IERS). The limiting molecular area (A0) obtained by STm showed that the negative deviation at xDMPC =0.6 when DMPC was added to the DPPC monolayer. BAM images also showed that the condensed rigid monolayer at xDMPC 0.5. Moreover, IER spectra showed that the alkyl chains of both DPPC and DMPC molecules are in trans conformation in mixed monolayer at xDMPC =0.2 whereas gauche conformation existed at xDMPC = 0.8. Above findings have justified the transition of flexible gauche conformation alkyl chains of DMPC molecule into rigid trans conformation by the addition of DPPC molecule at xDMPC 0.6.