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Relevant academic research and scientific papers

β-Cyclodextrin-Mediated Regioselective Hydrolysis of 5,10,15,20-Tetrakis-21H,23H-porphine

The four peripheral ester moieties of the title compound 5 are regioselectively hydrolyzed under mild conditions in the presence of β-cyclodextrin (10), providing a new entry to tetraphenylporphyrin derivatives with differently substituted Ph groups in th

Color optimization of red organic light emitting diodes (OLEDs) through dihydroxyphenyl-substituted zinc porphyrins emitters

Four tetrakis (dihydroxyphenyl) Zinc(II) porphyrin (Zn-TDHPP) were successfully synthesized and used as fluorescent materials in organic light-emitting diodes (OLEDs). Devices were fabricated with an indium tin oxide(ITO)/poly (3,4-ethylenedi-oxythiophene

Fabrication and analysis of dye-sensitized solar cells (DSSCs) using porphyrin dyes with catechol anchoring groups

Herein we report the preparation and application of 4 different zinc(ii) tetrakis(dihydroxyphenyl) porphyrins (ZnTDHPP) as the sensitizing dyes in dye-sensitized solar cells (DSSCs). The experimental results include solution and solid state UV-Vis data, steady state current-voltage characteristics, and our theoretical analysis comprised of density functional theory (DFT) and Langmuir isotherm adsorption formalism. The results show that the Zn tetrakis(2,3-dihydroxyphenyl) porphyrin (Zn2,3TDHPP) and Zn tetrakis(3,4-dihydroxyphenyl) porphyrin (Zn3,4TDHPP) with adjacent hydroxyl groups attaches to a TiO2 surface much more strongly than carboxylate. The catechol anchoring group showed high stability of the dye on the TiO2 surface. The cells prepared from these porphyrins showed no significant desorption of dye from the TiO2 surface after several days. The DSSCs based on Zn2,3TDHPP showed the best photovoltaic performance under AM 1.5 irradiation comparable to the conventional Zn tetrakis(p-carboxyphenyl) porphyrin (ZnTCPP), despite lower dye loading on the TiO2 surface. However, non-cooperative OH bonding to TiO2 for Zn2,4TDHPP and Zn2,5TDHPP shows weak attachment to the TiO2 surface and lower efficiencies. DFT calculations showed that the Zn2,3TDHPP structure is more non-planar than the others, which may suppress dye aggregation. The adopted adsorption modeling is fitted to the experimental data to study the kinetics of dye loading. The study can herald development of a new class of porphyrin sensitizer for DSSC applications.

Preparation and characterization of SDS-stabilized hydrophobic porphyrinic nanoaggregates in water

Porphyrin nanoaggregates formed in the interior of colloidal suspensions can be considered as examples of supramolecular systems with self-organized architecture. Due to their peculiar optical and electrochemical properties such as decrease of fluorescenc

One-pot general synthesis of metalloporphyrins

A new general one-pot method for the synthesis of various metalloporphyrins has been developed from pyrrole and substituted aldehydes using transition metal salts. This method allows higher working concentrations than those previously reported. Along with

Synthesis of porphyrins with pendant arms: Participation of the ancillary ligands to the complexation process in proteic medium

Ortho substituted porphyrins are able to complex copper (+II) in a neutral aqueous medium containing an excess bovine albumine.