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A Macrocyclic Ligand Framework That Improves Both the Stability and T1-Weighted MRI Response of Quinol-Containing H2O2 Sensors

Autor: Alexander C. Saunders, Christian R. Goldsmith, Achim Zahl, P Raj Pokkuluri, Ivana Ivanović-Burmazović, Ronald J. Beyers, Alicja Franke, Erik Knecht, Sana Karbalaei

Publikováno v: Inorganic Chemistry. 60:8368-8379

Previously prepared Mn(II)- and quinol-containing magnetic resonance imaging (MRI) contrast agent sensors for H2O2 relied on linear polydentate ligands to keep the redox-activatable quinols in close proximity to the manganese. Although these provide

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::487b27836b5e5fa6affa22a68fd9a71e
https://doi.org/10.1021/acs.inorgchem.1c00896

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Positive Charge on Porphyrin Ligand and Nature of Metal Center Define Basic Physicochemical Properties of Cationic Manganese and Iron Porphyrins in Aqueous Solution

Autor: Norbert Jux, Isabell Kenkel, Ivana Ivanović-Burmazović, Andreas Scheitler, Rainer Lippert, Domenico Balbinot, Achim Zahl, Alicja Franke

Publikováno v: Inorganic Chemistry. 58:9618-9630

Recently, comprehensive studies on positively charged manganese porphyrins show that these compounds, known for their superoxide dismutase (SOD) mimetic ability, can be equally reactive toward a broad array of other redox active molecules of biologic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e381cb9b69199be1d2de9491eed71263
https://doi.org/10.1021/acs.inorgchem.8b03381

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Quinol-containing ligands enable high superoxide dismutase activity by modulating coordination number, charge, oxidation states and stability of manganese complexes throughout redox cycling

Autor: Safaa Sader, Ralph Puchta, Katherine R. Fisher, Dominik Fehn, Andreas Scheitler, Christian R. Goldsmith, Sidney Ison, Laura Senft, Ivana Ivanović-Burmazović, Alicja Franke, Achim Zahl, Jamonica L. Moore

Publikováno v: Chemical Science

Reactivity assays previously suggested that two quinol-containing MRI contrast agent sensors for H2O2, [Mn(H2qp1)(MeCN)]2+ and [Mn(H4qp2)Br2], could also catalytically degrade superoxide. Subsequently, [Zn(H2qp1)(OTf)]+ was found to use the redox act

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec169fc76b6c4401c0edfb2a00781ac3
https://pubmed.ncbi.nlm.nih.gov/34447541

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Switching between Inner- and Outer-Sphere PCET Mechanisms of Small-Molecule Activation: Superoxide Dismutation and Oxygen/Superoxide Reduction Reactivity Deriving from the Same Manganese Complex

Autor: Matthew P. Shores, Carlos Dücker-Benfer, Christian R. Goldsmith, Isabell Kenkel, Ivana Ivanović-Burmazović, Achim Zahl, Jens Langer, Milos R. Filipovic, Meng Yu, Stephanie R. Fiedler, Maximilian Dürr, Ralph Puchta, Alicja Franke

Publikováno v: Journal of the American Chemical Society. 139:1472-1484

Readily exchangeable water molecules are commonly found in the active sites of oxidoreductases, yet the overwhelming majority of studies on small-molecule mimics of these enzymes entirely ignores the contribution of water to the reactivity. Studies o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6181ad2a33b546e77596479a53661392
https://doi.org/10.1021/jacs.6b08394

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Structure and reactivity of [RuII(terpy)(N^N)Cl]Cl complexes: consequences for biological applications

Autor: Olga Impert, Paulina Brzozowska, Achim Zahl, Anna Kozakiewicz, Andrzej Surdykowski, Marta Chrzanowska, Rudi van Eldik, Alicja Franke, Ralph Puchta, Anna Katafias

Publikováno v: Dalton Transactions. 46:10264-10280

The crystal structures of [RuII(terpy)(bipy)Cl]Cl·2H2O and [RuII(terpy)(en)Cl]Cl·3H2O, where terpy = 2,2′:6′,2′′-terpyridine, bipy = 2,2′-bipyridine and en = ethylenediamine, were determined and compared to the structure of the complexes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::deb3f6139a4525f50d16d5597b8e806c
https://doi.org/10.1039/c7dt01669g

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Does Perthionitrite (SSNO–) Account for Sustained Bioactivity of NO? A (Bio)chemical Characterization

Autor: Bernhard Bugenhagen, Achim Zahl, Ivana Ivanović-Burmazović, Milos R. Filipovic, Tatyana E. Shubina, Frank W. Heinemann, Peter Burger, Rudolf Wedmann, Maximilian Dürr

Publikováno v: Inorganic Chemistry. 54:9367-9380

Hydrogen sulfide (H2S) and nitric oxide (NO) are important signaling molecules that regulate several physiological functions. Understanding the chemistry behind their interplay is important for explaining these functions. The reaction of H2S with S-n

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e7f682529821e76062de557d86764d2
https://doi.org/10.1021/acs.inorgchem.5b00831

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