Electronic and conformational properties of the conjugated polymer MEH-PPV at a buried film/solid interface investigated by two-dimensional IR-visible sum frequency generation

Article Abstract:

Two-dimensional (2D) infrared visible (IR-vis) sum frequency generation (SFG) is used for measuring the buried surface electronic states of the conjugated polymer poly[2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylenevinylene] (MEH-PPV). The average conjugation length of MEH-PPV at the MEH-PPV/solid interface is shown to be around 5.8 monomer units and similar surface effects are seen at the air/polymer interface, with a slightly shorter average conjugation length.

Analysis, Technology application, Polymers, Composition, Infrared spectroscopy, Photoluminescence

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Breaking of the supercooled state of water by a nanocavity with disordered atomic configuration I: Freezing behavior of sorbed water into polymethylmethacrylate film as examined by Fourier transform infrared spectroscopy

Article Abstract:

Fourier transform infrared (IR) spectroscopy was used to investigate the freezing behavior of sorbed water into an annealed atactic polymethylmethacrylate (PMMA) film. The higher freezing temperature and temperature dependence of IR spectra indicated that a supercooled state of water is broken by disordered atomic configuration of a nanaoactivity wall with hydrogen bond acceptors.

Science & research, Plastics Material and Resin Manufacturing, Plastics materials and resins, Polymethyl Methacrylate, Research, Usage, Water, Thermal properties, Polymethylmethacrylate, Fourier transform infrared spectroscopy, Supercooling, Report

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