Výsledky vyhledávání - "Jessica Stubbe"

The transformations of a methylene-bridged bis-triazolium salt: a mesoionic carbene based metallocage and analogues of TCNE and NacNac†‡

Autor: Julia Beerhues, Simon Suhr, Biprajit Sarkar, Jessica Stubbe, Maite Nößler

Publikováno v: Chemical Science

Unusual and unexpected chemical transformations often provide access to completely new types of functional molecules. We report here the synthesis of a methylene-bridged bis-triazolium salt designed as a precursor for a new bis-mesoionic carbene (MIC

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df04863475f3c6a033a2ef85657a64ef
http://europepmc.org/articles/PMC8179415

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A Palladium-Free Sonogashira Coupling Protocol Employing an In Situ Prepared Copper/Chelating 1,2,3-Triazolylidene System

Autor: Efstathios Tonis, Georgios C. Vougioukalakis, Biprajit Sarkar, Athanasios Zarkadoulas, Ioannis Stamatopoulos, Felix Stein, Jessica Stubbe

Publikováno v: Synlett. 32:616-620

A new, palladium-free Sonogashira coupling reaction protocol using a catalytic system that comprises a simple, cheap, widely available copper salt and a chelating 1,2,3-triazolylidene ligand precursor is reported. This protocol provides the desired c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e52a5d3a5d62bd7741bd3034ac7779c7
https://doi.org/10.1055/a-1290-8469

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A Binuclear Cobalt Complex in the Electrochemical Water Oxidation Reaction

Autor: Sebastian Nestke, Jessica Stubbe, Robert Koehler, Emanuel Ronge, Uta Albold, Wolfgang Vioel, Christian Jooss, Biprajit Sarkar, Inke Siewert

The water splitting reaction represents an appealing approach to store solar energy. The 4e−/4H+ oxidation of water generating O2 is considered as the bottleneck in this reaction and usually requires a rather large over potential. We report on the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7bd5a8d04ae5377269f704c94618eb0

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Isomerization Reactions in Anionic Mesoionic Carbene-Borates and Control of Properties and Reactivities in the resulting CoII Complexes through Agostic Interactions

Autor: Michael G. Sommer, Biprajit Sarkar, Robert E. Mulvey, Julia Beerhues, Nicolás I. Neuman, Maite Nößler, Jessica Stubbe, Ross McLellan

Publikováno v: Angewandte Chemie (International Ed. in English)
CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET

We present herein anionic borate‐based bi‐mesoionic carbene compounds of the 1,2,3‐triazol‐4‐ylidene type that undergo C−N isomerization reactions. The isomerized compounds are excellent ligands for CoII centers. Strong agostic interactio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3530145c43d9a07d14a814877a2b6cb5
https://doi.org/10.26434/chemrxiv.12800168

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Vibrational Relaxation Dynamics of an Azido-Cobalt(II) Complex from Femtosecond UV-Pump/MIR-Probe Spectroscopy and Model Simulations with Ab Initio Anharmonic Couplings

Autor: Jessica Stubbe, Biprajit Sarkar, Peter Vöhringer, Steffen Straub, Jörg Lindner

Publikováno v: Inorganic chemistry. 59(20)

Vibrational energy relaxation is of critical importance for the light-controlled reactivity of transition-metal complexes. In time-resolved optical spectroscopies, it gives rise to pronounced spectral redistributions with complex band shifts and thus

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::705c67a2819203e1571f4b9a6ac4d1eb
https://pubmed.ncbi.nlm.nih.gov/32395987

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N , N′ ‐Ethylene‐Bridged Bis‐2‐Aryl‐Pyrrolinium Cations to E ‐Diaminoalkenes: Non‐Identical Stepwise Reversible Double‐Redox Coupled Bond Activation Reactions

Autor: Anukul Jana, Biprajit Sarkar, Mithilesh Kumar Nayak, Ramakirushnan Suriya Narayanan, Vadapalli Chandrasekhar, Nicolás I. Neuman, Sandipan Maji, Jessica Stubbe, Carola Schulzke

Publikováno v: CONICET Digital (CONICET)
Consejo Nacional de Investigaciones Científicas y Técnicas
instacron:CONICET
Chemistry (Weinheim an Der Bergstrasse, Germany)

This work presents a stepwise reversible two‐electron transfer induced hydrogen shift leading to the conversion of a bis‐pyrrolinium cation to an E‐diaminoalkene and vice versa. Remarkably, the forward and the reverse reaction, which are both r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::57fcaad8d563d9cb557bc056db318e42
Wiley Online Library

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Evidence for electron transfer between graphene and non‐covalently bound π‐systems

Autor: Itai Panas, Biprajit Sarkar, Jerker Mårtensson, Siegfried Eigler, P.L. Tam, Zhenping Wang, Valentina Cantatore, Jessica Stubbe, Steffen Brülls, Per Malmberg

Publikováno v: Chemistry (Weinheim an Der Bergstrasse, Germany)

Hybridizing graphene and molecules possess a high potential for developing materials for new applications. However, new methods to characterize such hybrids must be developed. Herein, the wet‐chemical non‐covalent functionalization of graphene wi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa2a596d3cbf7dffa1a1d357bbd29f20
https://refubium.fu-berlin.de/handle/fub188/27542

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A Palladium-Free Sonogashira Coupling Protocol Employing an In Situ Prepared Copper/Chelating 1,2,3-Triazolylidene System

Autor: Biprajit Sarkar Georgios C. Vougioukalakis Efstathios Tonis Felix Stein Ioannis K. Stamatopoulos Jessica Stubbe Athanasios Zarkadoulas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2127::780ef06579d7e3c8a3d3c4fef00eb150
https://pergamos.lib.uoa.gr/uoa/dl/object/uoadl:2955667

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Cu(II) complexes with hydrazone-functionalized phenanthrolines as self-activating metallonucleases

Autor: Julian Heinrich, Jessica Stubbe, Nora Kulak

Publikováno v: Inorganica Chimica Acta. 481:79-86

Cu(II) phenanthroline complexes are able to cleave DNA and show cytotoxic activity against cancer cells. Also, the biological activity of hydrazone-based compounds has been reported in the literature. This motivated us to combine these two systems. H

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::68b8f00ae60bdeec5cc40745fb19cd8f
https://doi.org/10.1016/j.ica.2017.11.015

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