Effect of Stearic Acid on Molecular Orientation in Metal-Free 2,9,16,23-Tetra-tert-butyltetrabenzotriazaporphine Langmuir-Blodgett Films

A novel ruthenium surfactant: electronic spectra, ZINDO analysis and Langmuir–Blodgett studies of trans-dichloro(6,6′-bis(N-dodecylbenzimidazol-2-yl)-2,2′-bipyridine)ruthenium(II) †

“…The APM is very small for a molecule as large as Ru(ddbbbpy)Cl 2 although small APM values and thus large tilt angles have been reported for phthalocyanines and related complexes. 42, 43 Isotherms recorded at barrier speeds of 5-50 mm min Ϫ1 more clearly show monolayer collapse consistent with a large complex with a large cross-sectional area. 6a Monolayer films are readily transferred from the trough to solid substrates indicative of the stability of the film.…”

“…The Cl Ϫ counter ions apparently migrate through the film which indicates that monolayers of Ru(ddbbbpy)Cl 2 , are self-assembled in a diffuse manner due to van der Waals interactions of the long alkyl chains. 43 From the peak current of the voltammograms and the area of the electrode surface, an approximation of the concentration of Ru(ddbbbpy)Cl 2 on the electrode surface can be determined from eqn. (1), where A is the surface area of the electrode, i p,a is i p,a = n 2 F 2 νAΓ/4RT…”

A novel binuclear ruthenium complex: spectroscopic and electrochemical characterization, and formation of Langmuir and Langmuir-Blodgett films

“…Therefore, the area per molecule obtained (60 Å 2 ) means that the molecules probably adopt an edgeon conformation, though formation of non-monomolecular structures is also possible, as observed for related complexes. 1,24,26,45,46 With the data presented herein, we cannot distinguish unequivocally between these 2 possibilities. Interestingly, the area accupied by the binuclear complex is twice the value for the related mononuclear complex, [RuCl 3 (dppb)L] (L= pyridine) (31 Å 2 ).…”

Influence of the Solvent Nature on the Structure of Two-Dimensional Nanoaggregates in Langmuir Layers of Copper Tetra-tert-butyltetrabenzotriazaporphyrin

“…Floating layers of metal-free tetra-tertbutyltetrabenzotriazaporphyrin were studied; [17] the data of comparative analysis of Langmuir layer of its copper complex and tetra-tert-butylsubstituted copper phthalocyanine were also presented by us, [18] although the structure of floating layers was estimated only qualitatively with the use of conventional method of analysis of compression isotherms of a layer.…”