Langmuir-Schäfer films of an amphiphilic ruthenium complex bearing an "almost naked" multicharged headgroup.
In this paper the preparation and characterization of Langmuir-Schäfer (LS) films of a novel amphiphilic dipolar complex, [Ru(II)(NH(3))(5)(N-dodecyl-4,4'-bpy)](PF(6))(3) (1), are reported. Preparation of these films, otherwise precluded utilizing standard Langmuir procedures, is achieved by using a subphase at relatively high ionic strength, by addition of NH(4)PF(6). The morphology and the spectroscopic features of the floating films are investigated by Brewster angle microscopy and UV-vis reflection spectroscopy at the water-air interface, respectively, whereas LS films are characterized by absorption spectroscopy and atomic force microscopy. The overall results indicate the existence of aggregates of 1 and formation of homogeneous, densely packed layers. The presented approach could represent a general method to achieve Langmuir-Blodgett films of amphiphilic metal complexes having an "almost naked" multicharged headgroup.
Dipartimento di Scienze Chimiche, Università di Catania, 95125 Catania, Italy. sdibella@unict.it
Santo
S
Di Bella
Salvatore
S
Sortino
Sabrina
S
Conoci
Salvatore
S
Petralia
Serena
S
Casilli
Ludovico
L
Valli