Ordered Langmuir-Blodgett Films of Novel Sandwich-Type Heteroleptic (Porphyrinato) (Phthalocyaninato) Europium Complex

Ordered molecular assemblies of novel sandwich-type heteroleptic (porphyrinato) (phthalocyaninato) europium complex (a double-decker compound) molecules were fabricated by Langmuir-Blodgett technique. The monolayer behaviors of the complex molecules were investigated using a series of techniques including surface pressure-area isotherm measurement, UV-vis spectroscopy, polarized UV-vis spectroscopy, and low-angle X-ray diffractometry. The results indicated that double-decker complex molecules form well-ordered and stable monolayers with a face-to-face configuration and edge-on arrangement to the water surface at the air-water interface as well as J-aggregates in lamellar multilayers on solid substrates. The orientation angle of the macrocycle in the double-decker compound with respect to the quartz slice surface in the LB films have been determined on the basis of the polarized absorbance and were found to be ca. 42 degrees.