Towards well-structured fullerene–phthalocyanine composites: Co-aggregation of fullerene C60 with tetrakis(4-amino-5-phenoxy)phthalocyanine

Borovkov, Nicholas Yu.; Blokhina, Svetlana V.

doi:10.1016/j.colsurfa.2011.01.044

Cited by 3 publications

(8 citation statements)

References 39 publications

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“…Upon the lamella-to-prism transformation, the formation of prismatic crystallites is also promoted by the transient phase, which does not vanish owing to spatial confinements (stage 4). Earlier the confinement effect was observed for sterically hindered CuPc whose phase transformation was totally obstructed by a small amount of polystyrene …”

Section: Resultsmentioning

confidence: 97%

“…Earlier the confinement effect was observed for sterically hindered CuPc whose phase transformation was totally obstructed by a small amount of polystyrene. 40 In conclusion, a practical aspect of the present study should be noted. Nowadays there is a chronic conflict between crystallinity and homogeneity of MPc films: highly symmetrical MPc's cannot be wet-processed into continuous films because they tend to form 3D phases, whereas lowering the molecular symmetry hampers the 3D crystallization.…”

Section: Top)mentioning

confidence: 87%

“…Light extinction of highly dispersed materials is known to be a superposition of absorption and scattering, 39 while nonuniform MPc films comply with this rule. 40 So, to link optical spectra with the SAXS data above, extinction of the LS films was split into two contributions for individual considerations (Support- ing Information, part 5). Key absorption features of the C 4h -CuPaz film are summarized in Figure 9.…”

Section: Top)mentioning

confidence: 99%

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Crystallization Behavior of Copper Tetra-tert-butylporphyrazine in Ultrathin Films

Borovkov

Kolker

2020

J. Phys. Chem. C

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Wet-processed films of crystalline metal phthalocyanines (MPc’s) are constructed from compact islands surrounded by disordered dye matter, which limits the physical properties of MPc films and, thus, requires much structural improvement. The present work considers this problem through the prism of a model compound, namely, highly symmetrical copper tetra-tert-butylporphyrazine (C 4h -CuPaz) that readily crystallizes irrespective of experimental conditions. Specifically, the film-forming properties of C 4h -CuPaz were examined in both an individual dye sample and a mixture of C 4h -CuPaz with the asymmetrical isomers. The dye films deposited by using the Langmuir–Schaefer technique were characterized by Brewster angle microscopy, scanning electron microscopy, small-angle X-ray scattering, and optical spectroscopy. The experimental data were integrated to construct a comprehensive scenario of the crystalline film growth starting from colloidal aggregates preassembled on the water surface. Finally a stratagem for improving the morphology of solution-processed MPc films is proposed: to obtain properly structured crystalline films, a stable hybrid phase composed of two MPc’s with different phase behaviors should be designed as a physical substitute for the disordered dye matter.

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Section: Resultsmentioning

confidence: 97%

Section: Top)mentioning

confidence: 87%

Section: Top)mentioning

confidence: 99%

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Crystallization Behavior of Copper Tetra-tert-butylporphyrazine in Ultrathin Films

Borovkov

Kolker

2020

J. Phys. Chem. C

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“…1% of the film surface. In view of the drastic inhomogeneity of fullerene composites, ,,, such a surface seems practically uniform, indicating that the CoPc # –C 60 system is highly resistant to the phase separation. Besides, there is a network of artificial grooves caused by a shear stress applied to the film during deposition.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The dilute CoPc # solution (0.3 mM) in chloroform and the saturated C 60 solution (0.9 mM) in cyclohexene were used to deposit the substances onto the water surface. The mixed layer was prepared by a two-step procedure . First, an appropriate amount of the CoPc # solution was spread over the triply distilled water surface from a Hamilton 10 μL syringe, and the solvent was allowed to evaporate.…”

Section: Methodsmentioning

confidence: 99%

Aqueous Route to Phthalocyanine–Fullerene Composites with Regular Structure

Borovkov

Kolker

2014

J. Phys. Chem. C

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Random mixtures of phthalocyanines (Pcs) with fullerene C 60 are currently exploited as active layers in organic solar cells. Therefore, spatially regular Pc−C 60 heterostructures, not designed so far, are of great interest as molecularly mixed donor−acceptor phases for further improving the device performance. Here we investigate the prospects to create such heterostructures by fine intermixing of π-rich Pcs with fullerene C 60 . Specifically, this work reports on the mixing behavior of cobalt tetrakis(3-amino-5-tert-butyl)phthalocyanine (CoPc # ) with fullerene C 60 . A composite film (CoPc # /C 60 = 1:2, mol) was prepared by the Langmuir−Schaefer technique from a floating layer with doubledecker architecture, where the CoPc # monolayer was interlinked with the C 60 submonolayer by the clustered water. This film was structurally analyzed and compared with the CoPc # film used as a reference. The latter film is found to be constructed from the 2-stack dye aggregates, which are assembled in the χ-phase mode, randomly oriented, and loosely packed. In the composite film, the C 60 molecules tend to intercalate into the interaggregate voids, making the aggregates consolidate and align in the vertical direction. Accordingly, the delamination process, which freely occurs in the pristine dye film, is inhibited in the composite. All aggregative features of CoPc # indicate that both structure and arrangement of the dye aggregates are determined by water-assisted H bonding via the primary amine groups. This kind of interaction is of use for tailoring Pc-based frameworks capable to host the C 60 molecules.

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Formation Reaction, Spectroscopy, and Photoelectrochemistry of the Donor–Acceptor Complex (5,10,15,20-Tetraphenyl-21,23H-porphinato)cobalt(II) with Pyridyl-Substituted Fullero[60]pyrrolidine

Бичан

Овченкова

Мозгова

et al. 2019

Russ. J. Inorg. Chem.

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Towards well-structured fullerene–phthalocyanine composites: Co-aggregation of fullerene C60 with tetrakis(4-amino-5-phenoxy)phthalocyanine

Cited by 3 publications

References 39 publications

Crystallization Behavior of Copper Tetra-tert-butylporphyrazine in Ultrathin Films

Crystallization Behavior of Copper Tetra-tert-butylporphyrazine in Ultrathin Films

Aqueous Route to Phthalocyanine–Fullerene Composites with Regular Structure

Formation Reaction, Spectroscopy, and Photoelectrochemistry of the Donor–Acceptor Complex (5,10,15,20-Tetraphenyl-21,23H-porphinato)cobalt(II) with Pyridyl-Substituted Fullero[60]pyrrolidine

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