Interfacial Properties of Substituted Fulleropyrrolidines on the Water Surface

Leo, Lucia; Mele, Giuseppe; Rosso, Giovanna; Valli, and Ludovico; Vasapollo, Giuseppe; Guldi, Dirk M.; Mascolo, G.

doi:10.1021/la9912038

Cited by 19 publications

(9 citation statements)

References 116 publications

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“…However, this notwithstanding, in many cases, the propensity of the buckyball to develop aggregates still manifests, unless very diluted spreading solutions and small volumes of them are used. 38 This confirms that the so-called hydrophile-lipophile balance, HLB 43 still leans towards the hydrophobic counterpart. Various solutions have been proposed in order to minimise the cohesive energy among C60 spheres and at the same time to promote the anchorage at the water surface.…”

Section: Discussionsupporting

confidence: 56%

Recent Developments in Langmuir-Blodgett Films Containing Fullerene Derivatives

Valli

Perosa

Tundo

2003

Advanced Macromolecular and Supramolecular Materials and Processes

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As a consequence of the detection of the fullerene series by Kroto et al.I and their consequential production in large amounts and by an easy procedure at the beginning of the nineties thanks to Kratschmer contribution,2 great interest has been concentrated on the investigations of the physical and chemical characteristics of these innovative materials. A considerable impulse to these examinations was given by the discovery of the superconductivity at high temperature which occurs when fullerenes are doped with alkali metals. 3 Fullerenes constitute a newborn and uncommon class of allotropes of carbon (the so-called third allotropic form of carbon). They and their functionalised derivatives are stimulating from both the basic and application perspectives owing to their appealing characteristics, such as superconductivity, ferromagnetism, nonlinear optical properties, charge-transfer behavior. 4 Practicable functions range from carbon composites and molecular sieves to catalysts, lubricants, optical limiters, superconducting and nanoscale devices. Anyhow, there are substantial requirements to promote processing procedures starting from fullerene and producing fullerene-derived materials that are the active constituents in thin films. In fact, in many cases, an essential requirement for the systematic investigation of the above-mentioned properties is the incorporation of fullerenes in organised 2D-arrays and 3D-networks .

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Section: Discussionsupporting

confidence: 56%

Recent Developments in Langmuir-Blodgett Films Containing Fullerene Derivatives

Valli

Perosa

Tundo

2003

Advanced Macromolecular and Supramolecular Materials and Processes

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“…This may be due to the isotropic shape of the particles. Such smooth collapses were also observed in the case of spherical core functionalised fullerene derivatives Leo et al (2000);gallani et al (2002). The reversibility of the isotherms was studied by successive compression and expansion of the monolayer at 25 • C. We find the monolayer to be highly reversible.…”

Section: Molecular Interaction At Air-water Interfacesupporting

confidence: 59%

Molecular Interactions at Interfaces

Gupta¹,

Manjuladevi²

2012

Molecular Interactions

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gold nanoparticle (AGN) exhibited variety of surface phases like low ordered liquid phase, high ordered liquid phase, bilayer of high ordered liquid phase and a collapsed state. Based on the thermodynamical studies of Langmuir monolayer of AGN, a phase diagram has been constructed. The Langmuir films at A-W interface can be transferred to solid substrates by LB technique. Here also, the nature of aggregation and deposition depends on molecule-substrates and intermolecular interaction. Interestingly, it was found that repeated process of adsorption and partial desorption of cholesterol molecules from hydrophobic substrates lead to the formation of uniformly distributed torus shaped domains.

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“…This accounts for the existence of intense intermolecularly attractive π–π interactions and very stable van der Waals aggregates, even at the air–water interface. Concentration of the spreading solution, nature and volume of the spreading solvent, and compression rate are all fundamental parameters in determining the quality of the floating film of C 60 derivatives 17. Therefore, in our approach towards high‐quality fullerene films, dilute spreading solutions (concentration less than 10 −4 m ) of the fullerene derivative, small volumes (always less than 50 μL) and very low speed of compression (4 cm 2 min −1 ) have been used.…”

Section: Introductionmentioning

confidence: 99%

Langmuir–Shäfer Transfer of Fullerenes and Porphyrins: Formation, Deposition, and Application of Versatile Films

Conoci

Guldi

Nardis

et al. 2004

Chemistry A European J

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Thin films consisting of a fulleropyrrolidine derivative 1 and a novel water-soluble porphyrin 2 were prepared by the Langmuir-Shäfer (LS, horizontal lifting) method. In particular, a solution of 1 in chloroform and dimethyl sulfoxide was spread on the water surface, while porphyrin 2 (bearing peripheral anionic groups) was dissolved into the aqueous subphase. To the best of our knowledge, such a versatile method of film fabrication for fullerene/porphyrin mixed composite films has never been used before. Evidence of the effective interactions between the two moieties at the air-water interface was obtained from the analysis of the floating layers by means of surface pressure versus area per molecule Langmuir curves, Brewster angle microscopy and UV-visible reflection spectroscopy. The characterisation of the LS films by UV-visible spectroscopy reveals that the two constituents behave as discrete and weakly interacting pi systems. The use of polarised light suggests the existence of a preferential direction of the macrocyclic rings with an edge-on arrangement with respect to the substrate surface. Finally, photoaction spectra were recorded from films deposited by only one horizontal lifting onto indium-tin-oxide (ITO) electrodes and the observed photocurrent increased notably with increasing transfer surface pressure.

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Interfacial Properties of Substituted Fulleropyrrolidines on the Water Surface

Cited by 19 publications

References 116 publications

Recent Developments in Langmuir-Blodgett Films Containing Fullerene Derivatives

Recent Developments in Langmuir-Blodgett Films Containing Fullerene Derivatives

Molecular Interactions at Interfaces

Langmuir–Shäfer Transfer of Fullerenes and Porphyrins: Formation, Deposition, and Application of Versatile Films

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