Changes in the Electronic States of Low-Temperature Solid n-Tetradecane: Decrease in the HOMO-LUMO Gap.

ABSTRACT: Intermolecular interactions between alkyl chains such as CH···HC should be reflected in the phase behavior of organic compounds. We measured the attenuated total reflectance spectra in the far-UV region (145-300 nm) of n-tetradecane (T _m = 5.9 °C), through both cooling and heating, from 15 to -38 °C, to determine its temperature dependency. The chosen temperature range, with the minimum temperature much lower than the melting point of n-tetradecane, allowed for a detailed examination of the liquid-solid phase transition. With decreasing temperature, the absorption band at 153 nm in the liquid phase becomes weaker, and new bands appear at around 200 and 230 nm. Because the observed variations in the band intensities are reversible during both cooling and heat

SUBMITTER: Morisawa Y 

PROVIDER: S-EPMC6641071 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature