Elucidation Of Properties In Langmuir Monolayers And Langmuir - Blodgett (LB) Films Formed By Calixarene for ion sensing applications.

One-molecule thick monolayer that assembled by insoluble organic material spread on an aqueous subphase, normally water subphase is known as Langmuir monolayer. Meanwhile, Langmuir-Blodgett (LB) film is a single or multiple layers of Langmuir monolayer being deposited onto a solid substrate. In this work, the characterization of calix[6]arene (C6) was studied using LB technique, surface potential meter and UV-Visible (UV-Vis) spectrometer. From surface pressure-area isotherms, the limiting area per molecule and radius of the molecule were decreased with the increment of spreading volume. Effective dipole moments were determined from surface potential values using Helmholtz equation. Later, maximum surface potential were obtained. In addition, UV-Vis spectroscopy demonstrated that peak absorbance of C6 occurred at 282nm with one “shoulder” peak exist at 275nm. Hence, some characteristic of C6 were elucidated and this material shall be further studied for practical applications such as ion sensing.