A5048304041- Porphyrin and Phthalocyanine Chemistry
- Perovskite Materials and Applications
- Organic Electronics and Photovoltaics
- Crystallization and Solubility Studies
- Conducting polymers and applications
- Nanoplatforms for cancer theranostics
- Photodynamic Therapy Research Studies
- X-ray Diffraction in Crystallography
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Quantum Dots Synthesis And Properties
- Metalloenzymes and iron-sulfur proteins
- Organic Light-Emitting Diodes Research
- Chemical Synthesis and Analysis
- Porphyrin Metabolism and Disorders
- Click Chemistry and Applications
- Thin-Film Transistor Technologies
- Advanced Photocatalysis Techniques
- Advanced Nanomaterials in Catalysis
- TiO2 Photocatalysis and Solar Cells
- Molecular Sensors and Ion Detection
- Advanced biosensing and bioanalysis techniques
National Centre of Scientific Research "Demokritos"
2020-2024
University of Crete
2018-2022
Crete University Press
2018
Organic solar cells based on nonfullerene acceptors have recently witnessed a significant rise in their power conversion efficiency values. However, they still suffer from severe instability issues, especially an inverted device architecture the zinc oxide bottom electron transport layers. In this work, we insert pyrene-bodipy donor–acceptor dye as thin interlayer at photoactive layer/zinc interface to suppress degradation reaction of acceptor caused by photocatalytic activity oxide....
We report a comparison between series of zinc and tin porphyrins as photosensitizers for photochemical hydrogen evolution using cobaloxime complexes molecular catalysts. Among all the chromophores tested, only positively charged porphyrin, [ZnTMePyP4+]Cl4, neutral porphyrin derivatives, Sn(OH)2TPyP, Sn(Cl2)TPP-[COOMe]4, Sn(Cl2)TPP-[PO(OEt)2]4, were photocatalytically active. Hydrogen was strongly affected by pH value well different concentrations both sensitizer catalyst. A comprehensive...
Abstract In this study, a highly efficient photocatalytic H 2 production system is developed by employing porphyrins as photocatalysts. Palladium and platinum tetracarboxyporphyrins (PdTCP PtTCP) are adsorbed or coadsorbed onto TiO nanoparticles (NPs), which act the electron transport medium scaffold that promotes self‐organization of porphyrinoids. The PdTCP PtTCP, forming H‐ J‐aggregates, respectively, key element for evolution, in absence NPs no catalytic activity detected. Notably,...
In the following work, we carried out a systematic study investigating behavior of thiosemicarbazone-nickel (II) complex (NiTSC-OMe) as molecular catalyst for photo-induced hydrogen production. A comprehensive comparison regarding combination three different chromophores with this has been performed, using [Ir(ppy)2(bpy)]PF6, [Ru(bpy)3]Cl2 and [ZnTMePy]PCl4 photosensitizers. Thorough evaluation parameters affecting evolution experiments (i.e. concentration, pH, solvent nature ratio),...
Comprehensive Summary Inverted perovskite solar cells (PSCs) have attracted increasing attention in recent years owing to their low‐temperature fabrication proces s. However, they suffer from a limited number of electron transport materials available with [6,6]‐phenyl C 61 butyric acid methyl ester (PCBM) be the most widely studied based on its appropriate energy levels and high mobility. The low relative permittivity aggregation tendency upon illumination PCBM, however, compromises cell...
The need to detect and monitor biomolecules, especially within cells, has led the emerging growth of fluorescent probes. One most commonly used labeling techniques for this purpose is reversible metallochelate coupling via a nitrilotriacetic acid (NTA) moiety. In study, we focus on synthesis characterization three new porphyrin-NTA dyads, TPP-Lys-NTA, TPP-CC-Lys-NTA, Py3P-Lys-NTA composed porphyrin derivative covalently connected with modified chelate ligand (NTA), possible Ni2+ ions...
Abstract Solar cells based on metal halide perovskite and polymer donor:nonfullerene acceptor blend absorbers have recently witnessed a significant rise in their photovoltaic performance. However, they still suffer from some instability issues originating the inferior interface quality poor nanomorphology of absorber layer. In this work, series functionalized boron‐dipyrromethene, BODIPY, molecules are introduced as ultrathin interlayers at absorber/electron transport layer interface. This...
Two novel porphyrins, ZnP(SP)CNCOOH and ZnPCNCOOH, bearing cyanoacrylic acid as an anchoring group were synthesized. Porphyrin contains a π‐conjugated spacer (SP) for improved electronic communication between the dye TiO 2 electrode. The bears polyethylene glycol chains to prevent aggregation enhance solubility of dye. Electrochemical measurements theoretical calculations suggest that both porphyrins are promising sensitizers dye‐sensitized solar cells (DSSCs), their molecular orbital energy...
Abstract Further advancements in organic light emitting diodes (OLEDs) using commercially available, low-cost materials is of high significance. Here, we report the application available chromophores as room temperature processed electron injection layers (EILs) conventional OLED architecture. The facile solution-processing these chromophores, namely, 4‐dimethylamino‐4′‐nitrostilbene (DANS) and 1‐(4‐(dimethylamino)phenyl)‐6‐phenyl‐1,3,5‐hexatriene, along with presence nitrogen atom their...
Abstract Conjugates of chlorins with β‐cyclodextrin connected either directly or via a flexible linker were prepared. In aqueous medium these amphiphilic conjugates photostable, produced singlet oxygen at rate similar to clinically used temoporfin and formed irregular nanoparticles aggregation. Successful loading the chemotherapeutic drug tamoxifen was evidenced in solution by UV‐Vis spectral changes dynamic light scattering profiles. Incubation MCF‐7 cells revealed intense spotted...
Supramolecular organization and self-assembly are the pillars of functionality many nanosystems. The covalent conjugate (6-spirolactam rhodamine B-6-monodeoxy)-β-cyclodextrin (Rho-βCD) is assembled as a self-included, rigid nanostructure, identical in crystal aqueous solution, revealed by detailed X-ray NMR analyses. Rho-βCD result an interesting reaction pathway, which partially de-aggregates Rho disturbs zwitterion↔spirolactone equilibrium. stable at pH 4.6, but displays controllable...
Abstract High-performance perovskite light-emitting diodes (PeLEDs) require a high quality emitter and appropriate charge transport layers to facilitate injection within the device. Solution-processed n-type metal oxides represent judicious choice for electron layer (ETL); however, they do not always present surface properties energetics compatible with emitter. Moreover, itself exhibits poor nanomorphology defect traps that compromise device performance. Here, we modulate interface between...