Inclusion phenomenon in mixed floating layers containing phthalocyanines

Nabok, Alexei; Ray, Asim K.; Hassan, Aseel; Omar, O.; Taylor, R. E.; Richardson, T.; Pavier, M.A.

doi:10.1016/s0040-6090(98)00601-4

Cited by 7 publications

(5 citation statements)

References 10 publications

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“…Spectrum vs Structure Relationship. The spectral pattern of CuPaz aggregation (Figures 3 and 6b) has not much in common with one of other azaporphyrines 2,3,14,17,24,28,31 and is surely beyond the scope of the exiton-coupling model. 39 However, its individual features are not unique.…”

Section: Micro-and Nanostructure Of the Floating Layersmentioning

confidence: 96%

“…Under such conditions, aggregation was caused not only by the π−π coupling but also by interactions between peripheral substituents and multiple solvation effects. The crucial role of solvation is clearly illustrated by aggregation behavior of n -alkyl-substituted Pc's in a monolayer on the water surface; compression-induced aggregation appears only if the floating layer is added with a fatty acid. Another questionable point is the similar values of the aggregation constants determined for differently substituted Pc's. , Hence, it is possible to infer that the heats derived from such constants in the work 5 have a vague relation with the π−π coupling as well.…”

Section: Introductionmentioning

confidence: 99%

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Nanoaggregates of Copper Porphyrazine in Floating Layers and Langmuir−Schaefer Films

et al. 2008

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Aggregation behavior of unsubstituted copper porphyrazine (CuPaz) on the water surface was studied by analysis of compression curves, Brewster angle microscopy (BAM), and optical spectroscopy. The structure and stability of the CuPaz aqua aggregates in the floating layers are determined by hydration degree that depends on initial surface concentration and surface pressure. Langmuir-Schaefer (LS) films of CuPaz were prepared by deposition of the variously structured floating layers and studied by X-ray scattering technique and optical spectroscopy. Stable and labile structures were detected and compared with the floating CuPaz aqua aggregates. Conditions of formation of the stable four-stacked nanoaggregates in LS films were determined. A model comprising both nucleation of CuPaz on the water surface and structural transformations in the solid films is proposed.

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Section: Micro-and Nanostructure Of the Floating Layersmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Nanoaggregates of Copper Porphyrazine in Floating Layers and Langmuir−Schaefer Films

et al. 2008

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“…The limiting area of the pure EMR film, determined by extrapolating the linear part of the isotherms to zero pressure, 130 Å 2 , is in good agreement with the values between 130 and 160 Å 2 observed in previous studies of related substances. 18,27,28 For the mixed films the mean molecular area decreases with increasing C 60 proportion. Since C 60 does not form a monolayer at the air-water interface, the limiting molecular areas taking only EMR molecules into account were calculated and plotted as a function of C 60 proportion.…”

Section: Resultsmentioning

confidence: 95%

Photoinduced Electron Transfer between a Self-Assembled Resorcinarene−[60]Fullerene Complex and Poly(3-hexylthiophene) in Langmuir−Blodgett Films

Vuorimaa¹,

Vuorinen²,

Tkachenko³

et al. 2001

Langmuir

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In the present study, a etoxymethylresorcinarene (EMR) is used as a trap for C60 molecules at the air-water interface. The resulting self-assembled EMR:C60 complexes form stable well-ordered monolayers which can be easily transferred to a solid substrate. The interlayer charge transfer between poly(3hexylthiophene) (PHT) and C60 was studied using the time-resolved Maxwell displacement charge (TRMDC) method. The structural details of the EMR molecule were calculated by means of molecular mechanics, semiempirical and ab initio methods. The computational results predict that there is enough space for the C60 molecule to be placed between the tails of the resorcinarene molecule.

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“…However, if a minuscule amount of calixarene was added, it remained stable and a layer could be produced. Richardson et al in their studies have shown calixarene to be an ideal LB material and mixtures with calixarenes have proved to form good LB films [11][12][13]. Hence calix [8]arene was used to enhance the film stability of the traditional non-LB material, Si 4 Pc.…”

Section: Resultsmentioning

confidence: 99%

Langmiur–Blodgett studies of silicon(IV) phthalocyanine bis(trihexylsilyoxide) and its optical properties

et al. 2009

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Inclusion phenomenon in mixed floating layers containing phthalocyanines

Cited by 7 publications

References 10 publications

Nanoaggregates of Copper Porphyrazine in Floating Layers and Langmuir−Schaefer Films

Nanoaggregates of Copper Porphyrazine in Floating Layers and Langmuir−Schaefer Films

Photoinduced Electron Transfer between a Self-Assembled Resorcinarene−[60]Fullerene Complex and Poly(3-hexylthiophene) in Langmuir−Blodgett Films

Langmiur–Blodgett studies of silicon(IV) phthalocyanine bis(trihexylsilyoxide) and its optical properties

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