Synthesis of a stable J-type dimer based on the 2-hydroxy- 9(10),16(17),23(24)-tri(tert-butyl)phthalocyanine zinc complex

Helical Self-Assembly of Optically Active Glycoconjugated Phthalocyanine J-Aggregates

Four galactoconjugated zinc(II) phthalocyanines (Pcs) have been prepared and fully characterized. The carbohydrate-containing phthalonitrile precursors of the Pcs were synthesized through a copper-catalysed azide-alkyne cycloaddition (CuAAC). The Pcs show a remarkable aggregation behaviour in solution, depending on the nature of the solvent, the temperature and the substitution position on the phthalocyanine. Solvent-dependent CD-spectroscopy experiments show that these Pcs aggregate as chiral helices in solution. Crystal structure data of a phthalocyanine bearing two carbohydrate units substantiate the properties shown by CD spectroscopy. Furthermore, the 1,2,3-triazole moieties of the Pcs play a decisive role in the formation of supramolecular aggregates. The glycoconjugated zinc(II) phthalocyanines described here show molar extinction coefficients ϵ_max >10⁵  M^-1  cm^-1 and absorption maxima λ_max >680 nm, which make them attractive photosensitizers for Photodynamic Therapy (PDT).

Monohydroxyphthalocyanines as potential precursors to create nanoscale optical materials

This work summarizes the achievements in the use of monohydroxyphthalocyanines for the preparation of stable J- and H-type dimers with covalent and non-covalent bonding of the macrocycles. A modified approach for the monohydroxyphthalocyanines preparation is given. Target compounds have a tendency to nanoaggregation with distinguishing optical properties which are useful for developing the next generation of optical materials.

Slipped-cofacial J-type phthalocyanine dimers as potential non-linear absorbers for optical limiting applications

Phthalocyanine J-type dimers show unusual spectral properties and self-assembly in the solid phase. The optical power limiting effect was theoretically investigated.

Thermally stable J-type phthalocyanine dimers as new non-linear absorbers for low-threshold optical limiters

The possibility of developing new advanced optical limiters of laser radiation at 532 nm with low limiting thresholds has been demonstrated on thermally stable phthalocyanine J-type dimeric complexes of Mg, Zn, Cu, Ni, and Co.

DFT study of the potential energy surfaces towards the searching of the stable self-assembled phthalocyanine dimers

We have applied the density functional theory (DFT) to find stable dimeric structures on the potential energy surfaces (PESs) of slippage, tilting and rotation of the macrocycles of monohydroxy magnesium phthalocyanine complex. Gradual changing of a distance between Mg 2+ ions and oxygen atoms of the OH -groups, as well as the dihedral angles between the planes passing through the isoindoline nitrogen atoms of different macrocycles has allowed finding of six stable dimeric structures that differ from each other by the spatial arrangement of the macrocycles. The most stable structure was found for the dimer in which two equivalent low-symmetry phthalocyanine macrocycles are double fixed by the coordination bonds between the complexing metal ions and oxygen of the OH -groups. This result is in agreement with our earlier experimental data.

Peripheral functionalisation of a stable phthalocyanine J-type dimer to control the aggregation behaviour and NLO properties: UV-Vis, fluorescence, DFT, TDHF and thermal study

Chemical modification of a stable phthalocyanine J-type dimer was demonstrated for the first time, with an emphasis on controlling the aggregation, spectral and NLO properties.

Self-assembly of 2-hydroxy-tri-tert-butylphthalocyaninato zinc into J-type dimer: UV-vis, DFT and spectropotentiometric study

The role of the base nature during complexation of 2-hydroxy-9(10),16(17),23(24)-tri-tert-butyl-29H,31H-phthalocyanine ligand (1) with zinc acetate was studied by the UV-vis spectroscopy and DFT calculations. The latter allowed us to explain the selective formation of double-coordinated J-type dimer in the presence of lithium methoxide. Spectropotentiometry was used to study the nucleophilic properties of the dimeric complex in comparison with the corresponding monomer and has demonstrated the strong intramolecular interactions of macrocycles.

A highly stable double-coordinated 2-hydroxy-tri(tert-butyl)-substituted zinc phthalocyanine dimer: synthesis, spectral study, thermal stability and electrochemical properties

Photophysical properties of the thermally and chemically stable J-type phthalocyanine dimer were studied for the first time.