Self-assembly multilayer of photochromic bolaform spiroxazine

A novel, bolaform spiroxazine in which the hydrophobic chain comprised a hexamethylene unit and a 1,4-diazabicyclo[2,2,2]octane unit was synthesized. Alternate multilayer films of the spiroxazine and polystyrenesulfonate (PSS) were prepared using layer-by-layer deposition. UV–vis absorbance measurements revealed that the bilayer deposition process was linear and highly reproducible. The photoinduced ionic conductivity response of the SO/PSS multilayer was also studied.