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Andrzej Sienkiewicz

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Related publications (72)

Page 3 of 4

Understanding Chloroquine Action at the Molecular Level in Antimalarial Therapy: X-ray Absorption Studies in Dimethyl Sulfoxide Solution

Andrzej Sienkiewicz

X-ray absorption spectroscopy is used to determine the local atomic structure around the iron atom from a soluble synthetic analogue of malaria pigment (hemozoin), cf. ferrimesoporphyrin IX of mesohematin anhydride, in the absence or presence of chloroquin ...

2011

Light-responsive polymer nanoreactors: a source of reactive oxygen species on demand

Andrzej Sienkiewicz

Various domains present the challenges of responding to stimuli in a specific manner, with the desired sensitivity or functionality, and only when required. Stimuli-responsive systems that are appropriately designed can effectively meet these challenges. H ...

Royal Soc Chemistry2013

Homo- and Heterodinuclear Iron Clathrochelate Complexes with Functional Groups in the Ligand Periphery

Rosario Scopelliti, Kay Severin, Henrik Moodysson Rønnow, Andrzej Sienkiewicz, Ivica Zivkovic, Konstantin Zhurov, Cornel Fink, Mathieu Jérémie Marmier, José Luis Bila

2018

La@C82 as a spin-active filling of SWCNTs: ESR study of magnetic and photophysical properties

László Forró, Arnaud Magrez, Duncan Thomas Lindsay Alexander, Andrzej Sienkiewicz, Bálint Náfrádi, Katarzyna Pierzchala, Luka Ciric

Electron microscopy (TEM) and electron spin resonance ESR) were applied to characterize lanthanum metallofullerene(La@C82)-filled peapods. The peapods were prepared by encapsulation of La@C82 in SWCNTs, which were obtained by laser ablation technique in th ...

2008

Isolation and redox reactivity of cerium complexes in four redox states

Rosario Scopelliti, Marinella Mazzanti, Andrzej Sienkiewicz, Fang-Che Hsueh

The chemistry of lanthanides is limited to one electron transfer reactions due to the difficulty of accessing multiple oxidation states. Here we report that a redox-active ligand combining three siloxides with an arene ring in a tripodal ligand can stabili ...

2023

Morphology and Photoluminescence of CH3NH3PbI3 Deposits on Nonplanar, Strongly Curved Substrates

László Forró, Endre Horvath, Andrzej Sienkiewicz, Márton Kollár, Luka Ciric, Anastasiia Glushkova, Konstantins Mantulnikovs, Péter Krisztián Matus

2018

Towards electron spin resonance of mechanically exfoliated graphene

László Forró, Arnaud Magrez, Andrzej Sienkiewicz, Bálint Náfrádi, Marijana Mionic Ebersold, Luka Ciric

We have attempted to prepare graphene samples by mechanical exfoliation of HOPG (highly oriented pyrolytic graphite) using scotch tape. Random testing of the flakes by AFM has shown in majority single layer graphene. Nevertheless, the presence of ultrathin ...

2009

Abatement of organics and Escherichia coli by N, S co-doped TiO2 under UV and visible light. Implications of the formation of singlet oxygen (1O2) under visible light

László Forró, César Pulgarin, Juan Kiwi, Andrzej Sienkiewicz, Julian Andrés Rengifo Herrera

2009

Uptake and intracellular trafficking of superparamagnetic iron oxide nanoparticles (SPIONs) in plants

Andrzej Sienkiewicz

The uptake and movement of iron nanoparticles in elodea plants have been detected by the ESR method. This method is applied for the first time for the monitoring of the translocation, movement and uptake iron nanoparticles in plant organs. Exposition of st ...

Inst Materials Physics2014

Degradation of Eight Relevant Micropollutants in Different Water Matrices by Neutral Photo-Fenton Process under UV254 and Simulated Solar Light Irradiation – a comparative study

César Pulgarin, Luiz Felippe De Alencastro, Andrzej Sienkiewicz, Dominique Grandjean

This is a comparative study of photolytic degradation under exposure to UV254 nm and solar-simulator irradiation of a mixture of eight equally concentrated relevant micropollutants in the presence of H2O2 and Fe(II) in ultrapure water, Lake Geneva water, a ...

Elsevier Science Bv2014

A Mesoionic Diselenolene Anion and the Corresponding Radical Dianion

Rosario Scopelliti, Kay Severin, Farzaneh Fadaei Tirani, Andrzej Sienkiewicz, Abdusalom Suleymanov, Zhaowen Dong, Cesare Berton

Dichalcogenolenes are archetypal redox non-innocent ligands with numerous applications. Herein, we describe a diselenolene ligand with fundamentally different electronic properties. By selenation of a C2-protected imidazolium salt, we have prepared a mesoi ...

2022

Loading and release of internally self-assembled emulsions embedded in a magnetic hydrogel

László Forró, Andrzej Sienkiewicz, Katarzyna Pierzchala

We have investigated drug loading and release from thermosensitive gel emulsions with external triggering by an alternating magnetic field (AMF) for on-demand drug delivery. Superparamagnetic iron oxide nanoparticles dispersed in gel emulsions were used to ...

Amer Inst Physics2014

Single potassium niobate nano/microsized particles as local mechano-optical Brownian probes

László Forró, Arnaud Magrez, Andrzej Sienkiewicz, Sylvia Jeney, Flavio Maurizio Mor

Perovskite alkaline niobates, due to their strong nonlinear optical properties, including birefringence and the capability to produce second-harmonic generation (SHG) signals, attract a lot of attention as potential candidates for applications as local nan ...

Royal Soc Chemistry2016

Upconversion Particle as a Local Luminescent Brownian Probe: A Photonic Force Microscopy Study

László Forró, Andrzej Sienkiewicz, Sylvia Jeney, Flavio Maurizio Mor

Near-infrared (NIR) light sensitive lanthanide-doped NaYF4 upconversion particles (UCPs) are gaining increasing attention as local probes in biomedical applications. Here, we implemented a photonic force microscope (PFM) to manipulate and study the optical ...

Amer Chemical Soc2014

Low-frequency ultrasound induces oxygen vacancies formation and visible light absorption in TiO2 P-25 nanoparticles

César Pulgarin, Andrzej Sienkiewicz, Julian Andrés Rengifo Herrera

Low-frequency ultrasound (LFUS) irradiation induces morphological, optical and surface changes in the commercial nano-TiO2-based photocatalyst, Evonik-Degussa P-25. Low-temperature electron spin resonance (ESR) measurements performed on this material provi ...

2012

Tuning the color of high-karat gold in Au-TiO2 nanoparticle composites all the way to black

László Forró, Andrzej Sienkiewicz, Endre Horvath, Claudio Grimaldi, Lidia Rocoffort de Vinnière

For centuries, artisans have harnessed gold nanoparticles to imbue their creations with the vibrant hues that captivate the eye through interactions with visible light. In modern times, these distinct optoelectronic characteristics have pivoted toward the ...

Cell Press2024

Central nervous system and systemic oxidative stress interplay with inflammation in a bile duct ligation rat model of type C hepatic encephalopathy (vol 178, pg 295, 2022)

Rolf Gruetter, Cristina Ramona Cudalbu Moldovan, Andrzej Sienkiewicz, Dunja Simicic, Katarzyna Pierzchala, Stefanita-Octavian Mitrea

ELSEVIER SCIENCE INC2022

Central Nervous System Oxidative Stress interplay with inflammation in a rat model of Type C Hepatic Encephalopathy - brothers in arms?

Cristina Ramona Cudalbu Moldovan, Andrzej Sienkiewicz, Dunja Simicic, Katarzyna Pierzchala, Stefanita-Octavian Mitrea

ELSEVIER SCIENCE INC2023

Tuning the π‐Accepting Properties of Mesoionic Carbenes: A Combined Computational and Experimental Study

Rosario Scopelliti, Kay Severin, Anne-Clémence Corminboeuf, Farzaneh Fadaei Tirani, Andrzej Sienkiewicz, Zhaowen Dong, Jacob Terence Blaskovits

Mesoionic imidazolylidenes are recognized as excellent electron-donating ligands in organometallic and main group chemistry. However, these carbene ligands typically show poor π-accepting properties. We have performed a computational analysis of 71 mesoion ...

2021

Synthesis, electrical resistivity, thermo-electric power and magnetization of cubic ZnMnO3

László Forró, Arnaud Magrez, Andrzej Sienkiewicz, Richard Gaal, Zlatko Mickovic, Jacim Jacimovic, Rita Smajda, George Cristian Vaju

Cubic ZnMnO3 powder in the form of well-crystalline nanoflakes have been synthesized at low temperatures from a nitrate precursor. The electrical properties of cubic ZuMnO(3) samples have been established by DC resistivity (rho) and thermo-electric power ( ...

Elsevier2011