Výsledky vyhledávání - "Marc Sven Lüth"

Connectivity patterns and rotamer states of nucleobases determine acid-base properties of metalated purine quartets

Autor: Bert P. Operschall, Bernhard Lippert, Marc Sven Lüth, Marta Garijo Añorbe, Gunnar Kampf, Rolf Griesser, Eva Freisinger, Helmut Sigel

Publikováno v: Journal of inorganic biochemistry. 148

Potentiometric pH titrations and pD dependent (1)H NMR spectroscopy have been applied to study the acidification of the exocyclic amino group of adenine (A) model nucleobases (N9 position blocked by alkyl groups) when carrying trans-a2Pt(II) (with a=

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e40e2eaadd0aae1c1f01ad8ed82c6a2e
https://pubmed.ncbi.nlm.nih.gov/25773716

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Isomeric Equilibria in Aqueous Solution Involving Aromatic Ring Stacking in the Sexternary Complexes Formed by the Quaternary cis-(NH3)2Pt(2‘-deoxyguanosine-N7)(dGMP-N7) Complex and the Binary Cu(2,2‘-bipyridine)2+ or Cu(1,10-phenanthroline)2+ Complexes (dGMP2- = 2‘-Deoxyguanosine 5‘-monophosphate)

Autor: Bernhard Lippert, Helmut Sigel, Bin Song, Marc Sven Lüth

Publikováno v: Inorganic Chemistry. 39:1305-1310

To the best of our knowledge, for the first time the stabilities of sexternary complexes are determined by potentiometric pH titrations in aqueous solution at 25 °C and I = 0.1 M (NaNO3). The sexternary complexes form by binding of the binary Cu(Arm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::849287937a32d077b8c0ef06794a8b77
https://doi.org/10.1021/ic9905087

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Taking Advantage of Right Angles in N1,N7-Diplatinated Purine Nucleobases: Toward Molecular Squares, Rectangles, and Meanders

Autor: Eva Freisinger, Bernhard Lippert, Frank Glahé, Jens Müller, Marc Sven Lüth

Publikováno v: Inorganic Chemistry. 37:3195-3203

Di- and trinuclear complexes of trans-a2PtII (a = NH3 or NH2CH3) and the purine model nucleobases 9-methyladenine (9-MeA), 9-ethyladenine (9-EtA), 9-methylguanine (9-MeGH), and 9-ethylguanine (9-EtGH) have been prepared and characterized. The followi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cb8c3df2670f6de3efdf81fd39584d79
https://doi.org/10.1021/ic980081o

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Perturbation of the NH2 pKa value of adenine in platinum(II) complexes: distinct stereochemical internucleobase effects

Autor: Bernhard Lippert, Patrick Lax, Marc Sven Lüth, Michael Roitzsch, Gunnar Kampf, Marta Garijo Añorbe, Marta Morell Cerdà, Helmut Sigel

Publikováno v: Scopus-Elsevier

The degree of acidification of the exocyclic N6 amino group of the model nucleobase 9-methyladenine (9MeA) in relation to the number and site(s) of Pt I I binding has been studied in detail. It is found that twofold Pt I I binding to N1 and N7 lowers

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8e4d19d9a504cb2b3332fe09ba35862
https://pubmed.ncbi.nlm.nih.gov/14978832

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Canonical and unconventional pairing schemes between bis(nucleobase) complexes of trans-a2PtII: Artificial nucleobase quartets and C—H…N bonds

Autor: Bernhard Lippert, Eva Freisinger, Marc Sven Lüth, Irene B. Rother

If two nucleobases are crosslinked by trans -a 2 Pt II , self-association via H bonding may take place either through individual bases or jointly through both bases. Due to the blockage of an acceptor site by the metal, the number of feasible pairing

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48027e28453ed03df16e29473a62bcfc
https://europepmc.org/articles/PMC152993/

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Metal-modified nucleobase pairs and triplets as cytosine receptors

Autor: Bernhard Lippert, Marc Sven Lüth, Eva Freisinger

Publikováno v: Chemistry (Weinheim an der Bergstrasse, Germany). 7(10)

A preorganized cationic receptor 2 for cytosine (C) is described which is composed of trans-a2PtII (a= NH3 or CH3NH2) cross-linked modules with adenine (A), guanine (G), and uracil (U) or thymine (T) model nucleobases. The functions of these three mo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb32b1d3a03ba4318f0422ad31a47f0b
https://pubmed.ncbi.nlm.nih.gov/11411983

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Extreme (109) acidification of adenine-NH2 in an open platinated nucleobase quartet. A pH switch with potential as a biological acid/base catalyst

Autor: Marc Sven Lüth, Michael Willermann, Bernhard Lippert

Publikováno v: Scopus-Elsevier

The combination of electronic effects (PtII binding to N7 and N1) and a favourable conformation permitting efficient stabilization of the anion brings about a 10(9) fold increase in the exocyclic amino group acidity of 9-ethyladenine.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29b4c36de3aff21b3a5316abc647a12b
https://doi.org/10.1039/b105395g

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Bis(purine) Complexes of trans-a2PtII: Preparation and X-ray Structures of Bis(9-methyladenine) and Mixed 9-Methyladenine, 9-Methylguanine Complexes and Chemistry Relevant to Metal-Modified Nucleobase Triples and Quartets J. Am. Chem. Soc. 1996, 118, 4124−4132

Autor: André Schreiber, Andrea Erxleben, Marc Sven Lüth, and Edda C. Fusch, Bernhard Lippert

Publikováno v: Journal of the American Chemical Society. 121:3248-3248

Mononuclear bis(purine) complexes of trans-a2PtII, trans-[(NH3)2Pt(9-MeA-N7) (9-MeGH-N7)](NO3)2·H2O (1b) and trans-[(NH3)2Pt(9-MeA-N7)2](ClO4)2·H2O (3c), have been prepared and their structures determined by X-ray crystallography. 1b: Space group P

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3ac6323fb44609c664acb365223d79a2
https://doi.org/10.1021/ja9955013

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