Layer-by-Layer Self-Assembly of a Metallo-Supramolecular Coordination Polyelectrolyte Studied by Infrared Spectroscopy, Microgravimetry, and X-ray Reflectance

摘要

Layer-by-Layer self-assembly on planar substrates of a Fe(II) metallo-su-pramolecular coordination polyelectrolyte (MEPE) and poly-(styrene sulfonate) (PSS) is investigated with a variety of surface sensitive techniques. Results from reflection-absorption infrared (RAIR) Spectroscopy and microgravimetry are in agreement with linear multilayer build-up. Furthermore, RAIR Spectroscopy indicates close to complete counter ion exchange during polyion deposition. The multilayers contain approximately 20 mass-percent water under ambient conditions. Water uptake and loss is completely reversible. Annealing to 250°C in air does not affect the structural integrity of the film as demonstrated by XRR measurements.