Two-Dimensional Aggregation of Crown-Phthalocyanine Ligand at Air-Water Interface

Shokurov, Alexander V.; Selektor, S. L.; Arslanov, V. V.; Karpacheva, Mariia; Gagina, I. A.; Gorbunova, Yulia G.; Tsivadze, А. Yu.

doi:10.6060/mhc2012.121106s

Cited by 6 publications

(3 citation statements)

References 32 publications

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“…Considering the fact that CRPcRu(pyz) 2 bears two axial pyrazine ligands, which are quite hydrophilic, face-on orientation of the molecule is most likely. The observed discrepancy between the experimental molecular area and the theoretical one is commonly explained by hydrophilic and labile nature of the crown-ether moieties, which can be partially immersed into the aqueous subphase and/or deformed slightly in the monolayer [ 36 , 37 , 38 , 39 ].…”

Section: Resultsmentioning

confidence: 99%

Spin Crossover in Nickel(II) Tetraphenylporphyrinate via Forced Axial Coordination at the Air/Water Interface

et al. 2021

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Coordination-induced spin crossover (CISCO) in nickel(II) porphyrinates is an intriguing phenomenon that is interesting from both fundamental and practical standpoints. However, in most cases, realization of this effect requires extensive synthetic protocols or extreme concentrations of extra-ligands. Herein we show that CISCO effect can be prompted for the commonly available nickel(II) tetraphenylporphyrinate, NiTPP, upon deposition of this complex at the air/water interface together with a ruthenium(II) phthalocyaninate, CRPcRu(pyz)2, bearing two axial pyrazine ligands. The latter was used as a molecular guiderail to align Ni···Ru···Ni metal centers for pyrazine coordination upon lateral compression of the system, which helps bring the two macrocycles closer together and forces the formation of Ni–pyz bonds. The fact of Ni(II) porphyrinate switching from low- to high-spin state upon acquiring additional ligands can be conveniently observed in situ via reflection-absorption UV-vis spectroscopy. The reversible nature of this interaction allows for dissociation of Ni–pyz bonds, and thus, change of nickel cation spin state, upon expansion of the monolayer.

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Section: Resultsmentioning

confidence: 99%

Spin Crossover in Nickel(II) Tetraphenylporphyrinate via Forced Axial Coordination at the Air/Water Interface

et al. 2021

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“…The method that has been devel oped makes it possible to control of the state of mono layer on aqueous subphase directly in the process of its formation and compression. For example, interrela tion between concentration of the solution, from which the monolayer was formed, and aggregation degree of the phthalocyanine ligand was determined using this method [167]. This allowed us to confirm that the absence of aggregation in the forming solution does not guarantee the absence of aggregation on the surface of aqueous subphase, and only with the use of relatively diluted solutions one can obtain true mono layers of the compound.…”

Section: Langmuir Monolayers and Langmuir-blodgett Films -Basic Ideasmentioning

confidence: 94%

Conjugated compounds in supramolecular informational systems: A review

Selektor

Shokurov

2015

Prot Met Phys Chem Surf

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“…Later, it was used to determine the number of molecules in aggregates of the crown-phthalocyanine ligand on the surface of water and by other authors. [22] Thin films of corroles possess peculiar structural and photophysical properties, making them candidates for application as photosensitizers, electronic molecular devices, etc. [23][24][25][26] Corroles (H 3 Cor) compared to porphyrins (H 2 P), have a wider variety of macrocyclic structures and high reactivity.…”

Section: Introductionmentioning

confidence: 99%

An Influence of Copper Cation in the Complex on Structure of the Nanostructured Layers, Spectral and Electrocatalytic Characteristics of Langmuir-Schaeffer Films of Triphenylcorrole

Berezina¹,

Vu²,

Kharitonova³

et al. 2019

MHC

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An influence of copper cation in the complex on structure and properties of the floating layers of 5,10,15-triphenylcorrole (Cu[(ms-Ph) 3 Cor]) at the air-water interface was studied. The structure of the layers has been determined using the method of quantitative analysis of compression isotherms. A model of stable nanostructured layers of the substance has been constructed. Copper cation in the macrocycle increases the density of two-dimensional M-nanoaggregates, while the number of molecules in such aggregates experiences 2-3-fold growth. Like the metal-free triphenylcorrole, this copper-containing compound in multilayer Langmuir-Schaeffer (LS) films with edge-on arrangement of molecules forms aggregates with strong intermolecular interactions. Such LS films may be suitable for electrocatalysis in the oxygen reduction reaction.

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Two-Dimensional Aggregation of Crown-Phthalocyanine Ligand at Air-Water Interface

Abstract: Physico-chemical properties of monolayers of tetra-15-crown-5-phthalocyanine ligand were studied using Langmuir-

Cited by 6 publications

References 32 publications

Spin Crossover in Nickel(II) Tetraphenylporphyrinate via Forced Axial Coordination at the Air/Water Interface

Spin Crossover in Nickel(II) Tetraphenylporphyrinate via Forced Axial Coordination at the Air/Water Interface

Conjugated compounds in supramolecular informational systems: A review

An Influence of Copper Cation in the Complex on Structure of the Nanostructured Layers, Spectral and Electrocatalytic Characteristics of Langmuir-Schaeffer Films of Triphenylcorrole

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