Gotard Burdziński
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View article: Deazaalloxazines – Flavin Derivatives That Provide Reductive Photoredox Catalysis with Inert Substrates
Deazaalloxazines – Flavin Derivatives That Provide Reductive Photoredox Catalysis with Inert Substrates Open
Reductive transformations of substances that are difficult to reduce continue to pose challenges for photoredox catalysis. Promising photoreduction catalysts include flavin and deazaflavin derivatives; however, even their reductive abiliti…
View article: Effect of Transcranial Direct and Alternating Current Stimulation on Visual Cortex Activity and Visual Quality
Effect of Transcranial Direct and Alternating Current Stimulation on Visual Cortex Activity and Visual Quality Open
Introduction: Transcranial direct current stimulation (tDCS) has shown potential in rehabilitating visual function among adults, including those with amblyopia. The effectiveness of various transcranial electrical stimulation (TES) protoco…
View article: Two-Photon-Driven Photoprotection Mechanism in Echinenone-Functionalized Orange Carotenoid Protein
Two-Photon-Driven Photoprotection Mechanism in Echinenone-Functionalized Orange Carotenoid Protein Open
Orange carotenoid protein (OCP) is a photoactive protein that mediates photoprotection in cyanobacteria. OCP binds different ketocarotenoid chromophores such as echinenone (ECN), 3'- hydroxyechinenone (hECN), and canthaxanthin (CAN). In th…
View article: Introduction of flavin anions into photoredox catalysis: acid–base equilibria of lumichrome allow photoreductions with an anion of an elusive 10-unsubstituted isoalloxazine
Introduction of flavin anions into photoredox catalysis: acid–base equilibria of lumichrome allow photoreductions with an anion of an elusive 10-unsubstituted isoalloxazine Open
Deprotonation of 3-methyllumichrome results in an anion of elusive 10- H -isoalloxazine which acts as a strong reducing agent upon blue/cyan light excitation.
View article: Two-photon driven photoprotection mechanism in echinenone-functionalized Orange Carotenoid Protein
Two-photon driven photoprotection mechanism in echinenone-functionalized Orange Carotenoid Protein Open
Orange carotenoid protein (OCP) is a photoactive protein that mediates photoprotection in cyanobacteria. OCP binds different ketocarotenoid chromophores such as echinenone (ECN), 3’- hydroxyechinenone (hECN) and canthaxanthin (CAN). In the…
View article: Cooperativity of ESPT and Aggregation-Induced Emission Effects—An Experimental and Theoretical Analysis of a 1,3,4-Thiadiazole Derivative
Cooperativity of ESPT and Aggregation-Induced Emission Effects—An Experimental and Theoretical Analysis of a 1,3,4-Thiadiazole Derivative Open
4-[5-(Naphthalen-1-ylmethyl)-1,3,4-thiadiazol-2-yl]benzene-1,3-diol (NTBD) was extensively studied through stationary UV–vis absorption and fluorescence measurements in various solvents and solvent mixtures and by first-principles quantum …
View article: Clicked BODIPY‐Fullerene‐Peptide Assemblies: Studies of Electron Transfer Processes in Self‐Assembled Monolayers on Gold Surfaces
Clicked BODIPY‐Fullerene‐Peptide Assemblies: Studies of Electron Transfer Processes in Self‐Assembled Monolayers on Gold Surfaces Open
Two BODIPY‐C 60 ‐peptide assemblies were synthesized by CuAAC reactions of BODIPY‐C 60 dyads and a helical peptide functionalized with a terminal alkyne group and an azide group, respectively. The helical peptide within these assemblies wa…
View article: Catalyst-free aerobic photooxidation of sensitive benzylic alcohols with chemoselectivity controlled using DMSO as the solvent
Catalyst-free aerobic photooxidation of sensitive benzylic alcohols with chemoselectivity controlled using DMSO as the solvent Open
Irradiation of a solution of an unsaturated benzyl alcohol in DMSO under oxygen leads to ketone formation. Side-oxidations are minimized, thanks to the protective role of the DMSO solvent against singlet oxygen. No catalyst or additives ar…
View article: Photoinduced Electron Transfer in Clicked Ferrocene‐BODIPY‐Fullerene Conjugates
Photoinduced Electron Transfer in Clicked Ferrocene‐BODIPY‐Fullerene Conjugates Open
Ferrocene‐BODIPY (Fc‐BDP) conjugates in which one or two ferrocene entities are linked to the β‐positions of the BODIPY core by an ethynyl bridge have been developed. These derivatives were easily and efficiently grafted onto a dual‐clicka…
View article: 5-Deazaalloxazine as photosensitizer of singlet oxygen and potential redox-sensitive agent
5-Deazaalloxazine as photosensitizer of singlet oxygen and potential redox-sensitive agent Open
Flavins are a unique class of compounds that combine the features of singlet oxygen generators and redox-dependent fluorophores. From a broad family of flavin derivatives, deazaalloxazines are significantly underdeveloped from the point of…
View article: Electron Transfer in a Bio-Photoelectrode Based on Photosystem I Multilayer Immobilized on the Conducting Glass
Electron Transfer in a Bio-Photoelectrode Based on Photosystem I Multilayer Immobilized on the Conducting Glass Open
A film of ~40 layers of partially oriented photosystem I (PSI) complexes isolated from the red alga Cyanidioschyzon merolae formed on the conducting glass through electrodeposition was investigated by time-resolved absorption spectroscopy …
View article: Unifying Perspective of the Ultrafast Photodynamics of Orange Carotenoid Proteins from <i>Synechocystis</i>: Peril of High-Power Excitation, Existence of Different S* States, and Influence of Tagging
Unifying Perspective of the Ultrafast Photodynamics of Orange Carotenoid Proteins from <i>Synechocystis</i>: Peril of High-Power Excitation, Existence of Different S* States, and Influence of Tagging Open
A substantial number of Orange Carotenoid Protein (OCP) studies have aimed to describe the evolution of singlet excited states leading to the formation of a photoactivated form, OCPR. The most recent one suggests that 3 ps-lived excited st…
View article: Oligomerization processes limit photoactivation and recovery of the Orange Carotenoid Protein
Oligomerization processes limit photoactivation and recovery of the Orange Carotenoid Protein Open
The Orange Carotenoid Protein (OCP) is a photoactive protein involved in cyanobacterial photoprotection, by quenching of the excess of light harvested energy. The photoactivation mechanism remains elusive, in part due to absence of data pe…
View article: Competition between intra-protein charge recombination and electron transfer outside photosystem I complexes used for photovoltaic applications
Competition between intra-protein charge recombination and electron transfer outside photosystem I complexes used for photovoltaic applications Open
Photosystem I (PSI) complexes isolated from three different species were electrodeposited on FTO conducting glass, forming a photoactive multilayer of the photo-electrode, for investigation of intricate electron transfer (ET) properties in…
View article: Structure-function-dynamics relationships in the peculiar <i>Planktothrix</i> PCC7805 OCP1: impact of his-tagging and carotenoid type
Structure-function-dynamics relationships in the peculiar <i>Planktothrix</i> PCC7805 OCP1: impact of his-tagging and carotenoid type Open
The orange carotenoid protein (OCP) is a photoactive protein involved in cyanobacterial photoprotection. Here, we report on the functional, spectral and structural characteristics of the peculiar Planktothrix PCC7805 OCP (Plankto-OCP). We …
View article: A unifying perspective of the ultrafast photo-dynamics of Orange Carotenoid Protein from <i>Synechocystis</i>: peril of high-power excitation, existence of different S* states and influence of tagging
A unifying perspective of the ultrafast photo-dynamics of Orange Carotenoid Protein from <i>Synechocystis</i>: peril of high-power excitation, existence of different S* states and influence of tagging Open
A substantial number of Orange Carotenoid Protein (OCP) studies have aimed to describe the evolution of singlet excited states leading to the formation of photo-activated form, OCP R . The most recent one suggests that three picosecond-liv…
View article: Antagonistic Effects of Point Mutations on Charge Recombination and a New View of Primary Charge Separation in Photosynthetic Proteins
Antagonistic Effects of Point Mutations on Charge Recombination and a New View of Primary Charge Separation in Photosynthetic Proteins Open
Light-induced electron-transfer reactions were investigated in wild-type and three mutant Rhodobacter sphaeroides reaction centers with the secondary electron acceptor (ubiquinone QA) either removed or permanently reduced. Under such condi…
View article: Competition between Photoinduced Electron Transfer and Resonance Energy Transfer in an Example of Substituted Cytochrome c–Quantum Dot Systems
Competition between Photoinduced Electron Transfer and Resonance Energy Transfer in an Example of Substituted Cytochrome c–Quantum Dot Systems Open
Colloidal quantum dots (QDs) are nanoparticles that are able to photoreduce redox proteins by electron transfer (ET). QDs are also able to transfer energy by resonance energy transfer (RET). Here, we address the question of the competition…
View article: Control of the Photo-Isomerization Mechanism in 3H-Naphthopyrans to Prevent Formation of Unwanted Long-Lived Photoproducts
Control of the Photo-Isomerization Mechanism in 3H-Naphthopyrans to Prevent Formation of Unwanted Long-Lived Photoproducts Open
In the photochromic reactions of 3H-naphthopyrans, two colored isomers TC (transoid-cis) and TT (transoid-trans) are formed. In terms of optimized photo-switchable materials, synthetic efforts are nowadays evolving toward developing 3H-nap…
View article: Photoinduced Electron Transfer and Energy Transfer\nProcesses in a Flexible BODIPY‑C<sub>60</sub> Dyad
Photoinduced Electron Transfer and Energy Transfer\nProcesses in a Flexible BODIPY‑C<sub>60</sub> Dyad Open
A new\ndonor–acceptor dyad composed of a BODIPY (4,4′-difluoro-4-bora-3a,4a-diaza-s-indacene) donor and a fullerene C60 acceptor\nhas been synthesized and characterized. This derivative has been prepared\nusing a clickable fullerene buildi…