0000000001305645
AUTHOR
Wenqian Shan
showing 12 related works from this author
Synthesis, Characterization, and Electrochemistry of Open-Chain Pentapyrroles and Sapphyrins with Highly Electron-Withdrawing meso -Tetraaryl Substit…
2017
International audience; A series of open-chain pentapyrroles and sapphyrins with highly electron-withdrawing substituents (i.e., CN, CF3 , or CO2 Me) on the meso-phenyl rings was synthesized and characterized as to the spectral properties, protonation reactions, and electrochemistry in non-aqueous media. The investigated compounds are represented as (Ar)4 PPyH3 and (Ar)4 SapH3 where PPy and Sap correspond to the tri-anion of the open-chain pentapyrrole and sapphyrin, respectively, and Ar=p-CNPh, p-CF3 Ph, or p-CO2 MePh. UV/Vis and 1 H NMR spectroscopy as well as mass spectrometry data are given for the confirmation of the structures for the newly synthesized compounds. An X-ray structure fo…
Synthesis, electrochemistry, protonation and X-ray analysis of meso-aryl substituted open-chain pentapyrroles
2019
Five meso-tetraaryl open-chain pentapyrroles were synthesized and characterized as to their electrochemistry and protonation reactions in nonaqueous media. The investigated compounds are represented as (Ar)4PPyH3 where Ar [Formula: see text],[Formula: see text]-F2Ph, [Formula: see text]-BrPh, Ph, [Formula: see text],[Formula: see text],[Formula: see text]-(OMe)3Ph or [Formula: see text]-MePh and were characterized by UV-vis and 1H NMR spectroscopy, mass spectrometry and electrochemistry. Cyclic voltammetry was used to measure redox potentials, while protonation involving the conversion of (Ar)4PPyH3 to [(Ar)4PPyH5][Formula: see text] was monitored by UV-vis absorption spectroscopy. Equilib…
Electrochemistry of Bis(pyridine)cobalt (Nitrophenyl)corroles in Nonaqueous Media
2018
International audience; A series of bis(pyridine)cobalt corroles with one or three nitrophenyl groups on the meso positions of the corrole macrocycle were synthesized and characterized as to their electrochemical and spectroscopic properties in dichloromethane, benzonitrile, and pyridine. The potentials for each electrode reaction were measured by cyclic voltammetry and the electron-transfer mechanisms evaluated by analysis of the electrochemical data combined with UV-visible spectra of the neutral, electroreduced, and electroxidized forms of the corroles. The proposed electronic configurations of the initial compounds and the prevailing redox reactions involving the electroactive central c…
Mono-DMSO ligated cobalt nitrophenylcorroles: electrochemical and spectral characterization
2018
Four mono-DMSO ligated cobalt corroles with one or three meso-nitrophenyl substituents on the macrocycle were synthesized and investigated as to their electrochemical and spectroscopic properties in CH2Cl2 and DMSO. Comparisons are made between redox reactions of the five-coordinate DMSO adducts in the current study and earlier examined five- and six-coordinate cobalt corroles with pyridine axial ligands which were characterized in a variety of nonaqueous electrochemical solvents. The binding of carbon monoxide (CO) is also investigated.
Ligand Noninnocence in Cobalt Dipyrrin–Bisphenols: Spectroscopic, Electrochemical, and Theoretical Insights Indicating an Emerging Analogy with Corro…
2019
Three cobalt dipyrrin-bisphenol (DPPCo) complexes with different meso-aryl groups (pentafluorophenyl, phenyl, and mesityl) were synthesized and characterized based on their electrochemistry and spectroscopic properties in nonaqueous media. Each DPPCo undergoes multiple oxidations and reductions with the potentials, reversibility, and number of processes depending on the specific solution conditions, the specific macrocyclic substituents, and the type and number of axially coordinated ligands on the central cobalt ion. Theoretical calculations of the compounds with different coordination numbers are given in the current study in order to elucidate the cobalt-ion oxidation state and the innoc…
Cobalt Corroles with Bis‐Ammonia or Mono‐DMSO Axial Ligands. Electrochemical, Spectroscopic Characterizations and Ligand Binding Properties
2018
International audience; Four bis-ammonia ligated cobalt corroles and four mono-DMSO ligated cobalt corroles with different mesoaryl substituents on the macrocycle (A 2 Band A 3-corroles) were synthesized and investigated as to their electrochemical and spec-troscopic properties under different solution conditions. The complexation energies of the investigated cobalt corroles were theoretically calculated to illustrate the propensity of the cobalt center for pentacoordination or hexa-coordination with various axial ligands (DMSO, CO, py and NH 3). The structure of one hexacoordinate bis-NH 3 cobalt corrole complex was also determined by X-ray diffraction.
CCDC 1539258: Experimental Crystal Structure Determination
2017
Related Article: Wenqian Shan, Nicolas Desbois, Virginie Blondeau-Patissier, Mario L. Naitana, Valentin Quesneau, Yoann Rousselin, Claude P. Gros, Zhongping Ou, Karl M. Kadish|2017|Chem.-Eur.J.|23|12833|doi:10.1002/chem.201701968
CCDC 1578032: Experimental Crystal Structure Determination
2018
Related Article: Xiaoqin Jiang, Mario L. Naitana, Nicolas Desbois, Valentin Quesneau, Stéphane Brandès, Yoann Rousselin, Wenqian Shan, W. Ryan Osterloh, Virginie Blondeau-Patissier, Claude P. Gros, Karl M. Kadish|2018|Inorg.Chem.|57|1226|doi:10.1021/acs.inorgchem.7b02655
CCDC 1880078: Experimental Crystal Structure Determination
2019
Related Article: Wenqian Shan, Nicolas Desbois, Sandrine Pacquelet, Stéphane Brandès, Yoann Rousselin, Jeanet Conradie, Abhik Ghosh, Claude P. Gros, Karl M. Kadish|2019|Inorg.Chem.|58|7677|doi:10.1021/acs.inorgchem.8b03006
CCDC 1812155: Experimental Crystal Structure Determination
2018
Related Article: Valentin Quesneau, Wenqian Shan, Nicolas Desbois, Stephane Brandes, Yoann Rousselin, Meddy Vanotti, Virginie Blondeau-Patissier, Mario Naitana, Paul Fleurat-Lessard, Eric Van Caemelbecke, Karl M. Kadish, Claude P. Gros|2018|Eur.J.Inorg.Chem.|2018|4265|doi:10.1002/ejic.201800897
CCDC 1554869: Experimental Crystal Structure Determination
2019
Related Article: Wenqian Shan, Valentin Quesneau, Nicolas Desbois, Virginie Blondeau-Patissier, Mario L. Naitana, Yoann Rousselin, Claude P. Gros, Zhongping Ou, Karl M. Kadish|2019|J.Porphyrins Phthalocyanines|23|213|doi:10.1142/S1088424619500214
CCDC 1815709: Experimental Crystal Structure Determination
2018
Related Article: Valentin Quesneau, Wenqian Shan, Nicolas Desbois, Stephane Brandes, Yoann Rousselin, Meddy Vanotti, Virginie Blondeau-Patissier, Mario Naitana, Paul Fleurat-Lessard, Eric Van Caemelbecke, Karl M. Kadish, Claude P. Gros|2018|Eur.J.Inorg.Chem.|2018|4265|doi:10.1002/ejic.201800897