Agnieszka Podborska

• dr
• Adiunct at AGH University of Krakow

A tandem UV–Vis and fluorescence spectroscopy method was developed for the detection of Pd(II) ions in ethanol. The formation of a complex between Pd(II) ions and tropaeolin OO (TR OO) is accompanied by a change in the color of the solution and evolution of the characteristic UV–Vis as well as fluorescence spectra. The optimal detection conditions...

Thiazolothiazoles (TzTzs) are planar, π‐conjugated heterocyclic compounds exhibiting unique structural and optoelectronic properties. In this study, a series of symmetrically substituted thiazolothiazole (TzTz) derivatives including imidazolyl, o‐vanillyl, p‐vanillyl, phenyl, thiazolyl, cinnamoyl, and trifluoromethylphenyl were synthesized and exte...

Cyanothiazoles, small and quite overlooked molecules, possess remarkable optical properties that can be fine‐tuned through coordination with transition metals. In this study, we investigate a promising application of cyanothiazoles, where their combination with copper(I) iodide forms a new class of complexes exhibiting outstanding optical propertie...

This study investigates the impacts of structure and composition on the optical and electronic properties of a series of pyridinium-based bismuth iodide complexes. Organic substrates with various functional groups, such as 4-aminopyridine (4-Ampy), 4-methylpyridine (4-Mepy), 4-dimethyaminopyridine (4-Dmapy), and 4-pyridinecarbonitrile (4-CNpy) with...

Cyanothiazoles, small and quite overlooked molecules, possess remarkable optical properties that can be fine-tuned through coordination with transition metals. In this study, we investigate a promising application of cyanothiazoles, where their combination with copper(I) iodide forms a new class of complexes exhibiting outstanding optical propertie...

Thiazolothiazoles (TzTz) represent a class of compounds with distinctive structural motifs and exceptional optical properties, positioning them as promising candidates for breakthroughs in optoelectronic and sensing technologies. X-ray crystallographic analyses of TzTz units symmetrically substituted with functional groups such as imidazole, o-vani...

Sensing technology is an important aspect of information processing. Current development in artificial intelligence systems (especially those aimed at medical and environmental applications) requires a lot of data on the chemical composition of biological fluids or environmental samples. These complex matrices require advanced sensing devices, and...

Here, the fabrication method of ultrathin Zener diodes is presented utilizing a novel hybrid system of zinc sulfide (ZnS) nanoparticles embedded within a poly(methacrylic acid) (PMAA) matrix, surface‐grafted via ARGET‐ATRP polymerization. The controlled polymerization method facilitates precise control over layer thickness, while the in situ synthe...

In this work, the role of ascorbic acid in the process of azo dye degradation was explained. For this purpose, the kinetics of azo dye degradation under different conditions was studied. Among them, the influence of daylight protection/exposition, different concentrations of ascorbic acid (0.567–0.014 mol/dm³), and temperature (20 °C and 50 °C) on...

The problem of environmental pollution is one of the most important in the modern world. Pollution causes an increase in human diseases, the extinction of many species of plants and animals, global warming, and many weather anomalies. One of the great challenges for scientists is the development of methods for monitoring and removing the emerging p...

The electrodeposited Cu-Cu 2 O composite films were investigated in terms of their selectivity, efficiency, and stability in the electrochemical and photoelectrochemical conversion of CO 2 to hydrocarbons. Composite films were deposited at various potentials from an alkaline copper(II) lactate solution. The influence of electrode potential on the s...

In this work, a family of Ni‐based dibenzotetraaza[14]annulene (dtaa) complexes are investigated for their application in memristors (memory resistors). A series of four Ni(II) complexes with different peripheral substituents of the dtaa ligand are successfully synthesized. Based on these compounds, two‐terminal thin‐film devices are fabricated in...

This study investigates the impacts of structure and composition on the optical and electronic properties of a series of pyridinium-based bismuth iodide complexes. Organic substrates with various functional groups, such as 4-aminopyridine (4-Ampy), 4-methylpyridine (4-Mepy), 4-dimethylaminopyridine (4-Dmapy), and 4-pyridinecarbonitrile (4-CNpy) wit...

Sensing technology is an important aspect of information processing. Current development in artificial intelligence systems (especially those aimed at medical and environmental applications) requires a lot of data on the chemical composition of biological fluids or environmental samples. These complex matrices require advanced sensing devices, and...

In this work, we follow the process of metalorganic complex formation between Pd(II) ions and 4-[4-(Dimethylamino)phenylazo]benzenesulfonic acid sodium salt (methyl orange) in the area of its tautomeric equilibrium. Using UV-Vis spectrophotometry we followed intermediate stages related to inorganic complex association, ligand exchange, cis – trans...

The selective determination of metals in waste solutions is a very important aspect of the industry and environmental protection. Knowledge of the contents and composition of the waste can contribute to design an efficient process separation and recovery of valuable metals. The problematic issue is primarily the correct determination of metals with...

The growing problem of skin diseases due to allergies often causing atopic dermatitis, which is characterized by itching, burning, and redness, constantly motivates researchers to look for solutions to soothe these effects by moisturizing skin properly. For this purpose, we combined poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) electrospun fi...

Plant extracts are intensively studied as green corrosion inhibitors of aluminum. Because these extracts are complex systems, the influence of their individual constituents on the corrosion of aluminum should be determined. In this work, gallic acid was tested for the first time as a corrosion inhibitor of aluminum in orthophosphoric acid aqueous s...

The proper determination of Pd(II) ions in the presence of Pt(IV) ions in a waste solution is an intricate analytical issue. Having the knowledge about waste composition, we are able to properly design processes and their selective separation and recovery. Other important aspect is related to the dyes removal coming from textile industry, which is...

In the paper, the mechanism of the process of the Rh(III) ions adsorption on activated carbon ORGANOSORB 10—AA was investigated. It was shown, that the process is reversible, i.e., stripping of Rh(III) ions from activated carbon to the solution is also possible. This opens the possibility of industrial recovery of Rh (III) ions from highly dilute a...

A better control over processes responsible for the photocurrent generation in semiconductors and nanocomposites is essential in the fabrication of photovoltaic devices, efficient photocatalysts and optoelectronic elements. Therefore, new approaches towards photochemical properties tuning are intensively searched for. Among numerous parameters, the...

An interesting interplay between two different modifiers and the surface of titanium dioxide leads to a significant change in photoelectrochemical properties of the designed hybrid materials. The semiconductor is photosensitized by one of the counterparts and exhibits the photoelectrochemical photocurrent switching effect thanks to interactions wit...

Over the last few years we have witnessed a great progress in the research devoted to unconventional computing – an unorthodox approach to information handling. It includes both novel algorithms and computing paradigms as well as completely new elements of circuitry: whole organisms (e.g., Physarum species), DNA, enzymes, various biomolecules, mole...

The kinetics studies of redox reaction between palladium(II) chloride complex ions and potassium formate in acidic aqueous solutions was investigated. It was shown, that the reduction reaction of Pd(II) is selective in respect to Pd(II) complex structure. The kinetic of the process was monitored spectrophotometrically. The influence of chloride ion...

An interesting interplay between two different modifiers and the surface of titanium dioxide leads to a significant change in the photoelectrochemical properties of the designed hybrid materials. The semiconductor is photosensitized by one of the counterparts and exhibits the photoelectrochemical photocurrent switching effect due to interactions wi...

Time dependent density functional theory (TD-DFT) and spectrophotometric methods were used for speciation analysis in Pd²⁺−Cl⁻−H2O system. It was shown, that there is an excellent harmony between TD-DFT calculated UV-VIS spectra end those registered using spectrophotometric method. It was shown, that for simple electrolyte, a several different form...

Increasing demand for high computational power and high density memories enforces rapid development of microelectronic technologies. However, classical, silicon-based electronic elements cannot be miniaturized infinitely. Therefore, in order to sustain rapid development of information processing devices, new approaches towards future computing devi...

Przedmiotem wynalazku jest hybrydowy element optoelektroniczny wykazujący efekt pamięci krótkotrwałej, znajdujący zastosowanie w optoelektronicznych bramkach logicznych, w układach neuro-mimetycznych, w których zachodzą procesy przetwarzania informacji wprowadzonej, jako seria impul-sów światła, a także w sensorach chemicznych oraz diagnostyce biom...

The graphene oxide (GO) and GO@TiO2 nanocomposite have been synthesised by using modified Hummers method and ultrasonics respectively. The materials were characterized by using X-ray diffraction, Fourier transform infrared spectroscopy and UV-Vis absorption spectroscopy. It was found that the interaction between GO and TiO2 affects the average inte...

A series of thiosemicarbazide anion chemosensors substituted with naphthalene and 4-nitrophenyl or phenyl units were synthesized. The molecules were characterized by using 1H,13C DEPT and 15N NMR spectroscopy. The anion binding properties of compounds 1–4 were investigated by UV/Vis absorption and fluorescence spectroscopy in DMSO, DMSO/H2O (9:1 v/...

In the 21st century, information has become the most valuable resource that is available to modern societies. Thus, great efforts have been made to develop new information processing and storage techniques. Chemistry can offer a wide variety of computing paradigms that are closely related to the natural processes found in living organisms (e.g., in...

An optoelectronic device based on a new hybrid material, which is capable of mimicking synaptic plasticity, is developed. The response of the system is consistent with basic neurophysiological models and its fundamental parameters correspond with the values obtained for biological systems. The mechanism responsible for the observed synaptic behavio...

The possibility of applying radiation sterilization to cefoselis sulfate was investigated. The lack of changes in the chemical structure of cefoselis sulfate irradiated with a dose of 25 kGy, required to attain sterility, was confirmed by ultraviolet, Fourier transform infrared, Raman, differential scanning calorimetry, scanning electron microscopy...

Electronic properties of fullerene derivatives containing oligothiophene pendant chain (1–3 thiophene moieties) were investigated using the Kelvin probe technique and quantum chemistry methods. For electrochemical examination of these systems, Langmuir–Blodgett (LB) layers were prepared by the deposition on a gold substrate. The analysis of the exp...

FT-IR and Raman scattering spectra of cefuroxime axetil were proposed for identification studies of its crystalline and amorphous forms. An analysis of experimental spectra was supported by quantum-chemical calculations performed with the use of B3LYP functional and 6-31G(d,p) as a basis set. The geometric structure of a cefuroxime axetil molecule,...

Four model thiosemicarbazide anion chemosensors containing three N-H bonds, substituted with phenyl and/or 4-nitrophenyl units, were synthesised and studied for their anion binding abilities with hydroxide, fluoride, acetate, dihydrogen phosphate and chloride. The anion binding properties were studied in DMSO and 9 : 1 DMSO-H2O by UV-visible absorp...

Semiconducting nanoparticles offer a versatile platform for various logic devices. Wide band gap semiconductors modified with molecular species are materials with unique optical and electronic properties. The most intriguing property of such systems is photoelectrochemical photocurrent switching (PEPS) effect. The polarity of photocurrent generated...

New materials and new phenomena that can be used for information processing always inspire great enthusiasm. Wide-band-gap semiconductors modified with various molecular species are such exciting materials. They constitute unique systems combining collective properties of solids with structural diversity of molecules which show distinctive photoele...

The review focuses on semiconductor nanoparticles and hybrid materials obtained by immobilisation of various molecular species on nanoparticulate semiconductors. These materials constitute unique systems combining collective properties of solids with structural diversity of molecules which show distinctive photoelectrochemical properties. Theoretic...

New materials and new phenomena which can be used for information processing always inspire great enthusiasm. On the other hand, silicon is still the main workhorse of modern electronics. Production of bulk quantities of ultrapure silicon is relatively cheap and the processing technologies are extremely sophisticated. Introduction of new materials...

Photoelectrodes containing cadmium sulfide deposited as powders and crystalline thin layers combined with semi-solid ionic liquid electrolyte behave like Schottky photodiodes. Appropriate connection of these devices results in simple optoelectronic logic gates (AND, XOR) and enables construction of an optoelectronic binary half-adder.

Nanocrystalline sulfur-doped cadmium sulfide (CdS) prepared by microwave synthesis was investigated. Photoelectrochemical and optical characteristics of sulfur-doped CdS exhibit the photoelectrochemical photocurrent switching effect. Depending on the wavelength and applied bias, the anodic and/or cathodic photocurrent was observed. The unusual beha...

The photoelectrochemical photocurrent switching (PEPS) effect, in the beginning regarded as a scientific curiosity, has become a field of extensive study for numerous research groups all over the world. This unique effect can be utilized for nanoscale switching and information processing, furthermore, is can serve as an interface between molecular...

A series of cadmium sulfide materials have been prepared using microwave-assisted hydrolysis of cadmium−thiourea complexes in water and nonaqueous solvents. Materials are characterized using X-ray diffraction, scanning electron microscopy, diffuse reflectance spectroscopy, and various photoelectrochemical techniques. Sulfur-doped samples of CdS exh...