Interactions and reactions of monolayers and Langmuir–Blodgett multilayers with compounds in the bulk phase

Gabrielli, G.; Caminati, Gabriella; Puggelli, M.

doi:10.1016/s0001-8686(99)00040-8

Cited by 14 publications

(4 citation statements)

References 72 publications

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“…As previously suggested, the aliphatic chains must exhibit high interaction energies to provide ordered liquid-condensed-phase monolayers. [46] Furthermore, a delicate balance between the selection of the coligands and the length of the alkyl chains seems to exist, and appears pivotal to the control of domain formation in Langmuir films of these metallosurfactants. In these experiments, surface pressure was the only variable.…”

mentioning

confidence: 99%

Interfacial Behavior and Film Patterning of Redox‐Active Cationic Copper(II)‐Containing Surfactants

Driscoll¹,

Allard²,

Wu³

et al. 2008

Chemistry A European J

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Herein, we describe the synthesis and characterization of a novel series of single-tail amphiphiles LPyCn (Py=pyridine, Cn=C18, C16, C14, C10) and their copper(II)-containing complexes, which are of relevance for patterned films. The N-(pyridine-2-ylmethyl)alkyl-1-amine ligands and their complexes [CuIICl2(LPyC18)] (1), [CuIICl2(LPyC16)] (2), [CuIICl2(LPyC14)] (3), [CuIIBr2(LPyC18)] (4), [CuIIBr2(LPyC16)] (5), and [CuIIBr2(LPyC10)] (6) were synthesized, isolated, and characterized by means of mass spectrometry, IR and NMR spectroscopies, and elemental analysis. Complexes 1, 2, 3, and 6 had their molecular structure solved by X-ray diffraction methods, which showed that the local geometry around the metal center is distorted square planar. With the aim of using these species as precursors for redox-responsive films, an assessment of their electrochemical properties involved cyclic voltammetry in different solvents, with different supporting electrolytes and scan rates. Density functional theory calculations of relevant species in bulk and at interfaces were used to evaluate their electronic structure and dipole moments. The morphology and order of the resulting films at the air/water interface were studied by isothermal compression and Brewster angle microscopy. Biphasic patterned Langmuir films were observed for all complexes except 3 and 6, and dependence on the chain length and the nature of the halogen coligand determine the characteristics of the isotherms and their intricate topology. Complexes 3 and 6, which have shorter chain lengths, failed to exhibit organization. These results exemplify the first comprehensive study of the behavior of single-tail metallosurfactants, which are likely to lead to high-end technological applications based on their patterned films.

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confidence: 99%

Interfacial Behavior and Film Patterning of Redox‐Active Cationic Copper(II)‐Containing Surfactants

Driscoll¹,

Allard²,

Wu³

et al. 2008

Chemistry A European J

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“…Interestingly, Langmuir monolayers formed with a variety of amphiphilic compounds, including fatty acids and long-chain amines, are also pH dependent but an increase of the limiting molecular area is typically observed for charged molecules due to the electrostatic repulsion between the headgroups in the monolayers. 83,84 Likewise, the surface pressure-area isotherms for N,N 00 -di(n-cetyl)cyclen Langmuir monolayers follow the same trend upon acidifying the water subphase. [63][64][65][66][67][68] This result was ascribed to both the electrostatic repulsions between positively charged macrocycles and to the increased rigidity of the tetraamine once protonated.…”

Section: Langmuir Monolayer Formationmentioning

confidence: 79%

Towards sensory Langmuir monolayers consisting of macrocyclic pentaaminoanthraquinone

et al. 2014

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“…DV-A measurements were obtained with the method of the ionising electrode by using 241 Am electrodes with an apparatus assembled in the Department of Chemistry (Florence) and previously described. 12,13 The accuracy of p is AE0.1 mN m À1 , of A is AE0.5 A ˚2 molecule À1 and of DV is AE10 mV. Monolayer relaxation studies, at constant p ¼ 15 mN m À1 , were performed using a KSV 3000 film balance (KSV Instruments).…”

Section: Methodsmentioning

confidence: 99%

Self-aggregation and phase separation of a styryl dye in monolayer at the liquid–air interface and in Langmuir–Blodgett films

Gambinossi

Baglioni

Caminati

2004

Phys. Chem. Chem. Phys.

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The styryl dye 4-[2-[6-(dioctylamino)-2-naphthalenyl]ethenyl]-1-(3-sulfopropyl)-pyridinium inner salt, (Di-8-ANEPPS), was incorporated in mixed Langmuir, (L), monolayers with the cationic surfactant, octadecyltrimethylammonium bromide, (OTMA). The stability of the monolayers was found to vary with the surface pressure and the amount of the diluent in the mixtures. The organization of the dye at the interface, deduced from surface pressure-area, p-A, and surface potential-area, DV-A, isotherms, is compared with the spectroscopic data in Langmuir and Langmuir-Blodgett, (LB), films. UV-visible absorption spectra of the pure dye and of the mixtures in L and LB monolayers show the formation of aggregates or domains of Di-8-ANEPPS within the matrix at high amphiphile content. On the contrary, successful transfer of the monomeric form of the dye was achieved using small molar fraction of the cationic matrix.

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Interactions and reactions of monolayers and Langmuir–Blodgett multilayers with compounds in the bulk phase

Cited by 14 publications

References 72 publications

Interfacial Behavior and Film Patterning of Redox‐Active Cationic Copper(II)‐Containing Surfactants

Interfacial Behavior and Film Patterning of Redox‐Active Cationic Copper(II)‐Containing Surfactants

Towards sensory Langmuir monolayers consisting of macrocyclic pentaaminoanthraquinone

Self-aggregation and phase separation of a styryl dye in monolayer at the liquid–air interface and in Langmuir–Blodgett films

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