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1D Copper(II)-Aroylhydrazone Coordination Polymers: Magnetic Properties and Microwave Assisted Oxidation of a Secondary Alcohol

The 1D Cu(II) coordination polymers [Cu(3)(L(1))(NO(3))(4)(H(2)O)(2)](n) (1) and [Cu(2)(H(2)L(2))(NO(3))(H(2)O)(2)](n)(NO(3))(n) (2) have been synthesized using the aroylhyrazone Schiff bases N'(1),N'(2)-bis(pyridin-2-ylmethylene)oxalohydrazide (H(2)L(1)) and N'(1),N'(3)-bis(2-hy...

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Autores principales: Sutradhar, Manas, Alegria, Elisabete C. B. A., Barman, Tannistha Roy, Guedes da Silva, M. Fátima C., Liu, Cai-Ming, Pombeiro, Armando J. L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7069101/
https://www.ncbi.nlm.nih.gov/pubmed/32211380
http://dx.doi.org/10.3389/fchem.2020.00157
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author Sutradhar, Manas
Alegria, Elisabete C. B. A.
Barman, Tannistha Roy
Guedes da Silva, M. Fátima C.
Liu, Cai-Ming
Pombeiro, Armando J. L.
author_facet Sutradhar, Manas
Alegria, Elisabete C. B. A.
Barman, Tannistha Roy
Guedes da Silva, M. Fátima C.
Liu, Cai-Ming
Pombeiro, Armando J. L.
author_sort Sutradhar, Manas
collection PubMed
description The 1D Cu(II) coordination polymers [Cu(3)(L(1))(NO(3))(4)(H(2)O)(2)](n) (1) and [Cu(2)(H(2)L(2))(NO(3))(H(2)O)(2)](n)(NO(3))(n) (2) have been synthesized using the aroylhyrazone Schiff bases N'(1),N'(2)-bis(pyridin-2-ylmethylene)oxalohydrazide (H(2)L(1)) and N'(1),N'(3)-bis(2-hydroxybenzylidene)malonohydrazide (H(4)L(2)), respectively. They have been characterized by elemental analysis, infrared (IR) spectroscopy, UV-Vis spectroscopy, electrospray ionization mass spectrometry (ESI-MS), single crystal X-ray diffraction and variable temperature magnetic susceptibility measurements (for 2). The ligand (L(1))(2−) coordinates in the iminol form in 1, whereas the amide coordination is observed for (H(2)L(2))(2−) in 2. Either the ligand bridge or the nitrate bridge in 2 mediates weak antiferromagnetic coupling. The catalytic performance of 1 and 2 has been investigated toward the solvent-free microwave-assisted oxidation of a secondary alcohol (1-phenylethanol used as model substrate). At 120°C and in the presence of the nitroxyl radical 2,2,6,6-tetramethylpiperydil-1-oxyl (TEMPO), the complete conversion of 1-phenylethanol into acetophenone occurs with TOFs up to 1,200 h(−1).
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spelling pubmed-70691012020-03-24 1D Copper(II)-Aroylhydrazone Coordination Polymers: Magnetic Properties and Microwave Assisted Oxidation of a Secondary Alcohol Sutradhar, Manas Alegria, Elisabete C. B. A. Barman, Tannistha Roy Guedes da Silva, M. Fátima C. Liu, Cai-Ming Pombeiro, Armando J. L. Front Chem Chemistry The 1D Cu(II) coordination polymers [Cu(3)(L(1))(NO(3))(4)(H(2)O)(2)](n) (1) and [Cu(2)(H(2)L(2))(NO(3))(H(2)O)(2)](n)(NO(3))(n) (2) have been synthesized using the aroylhyrazone Schiff bases N'(1),N'(2)-bis(pyridin-2-ylmethylene)oxalohydrazide (H(2)L(1)) and N'(1),N'(3)-bis(2-hydroxybenzylidene)malonohydrazide (H(4)L(2)), respectively. They have been characterized by elemental analysis, infrared (IR) spectroscopy, UV-Vis spectroscopy, electrospray ionization mass spectrometry (ESI-MS), single crystal X-ray diffraction and variable temperature magnetic susceptibility measurements (for 2). The ligand (L(1))(2−) coordinates in the iminol form in 1, whereas the amide coordination is observed for (H(2)L(2))(2−) in 2. Either the ligand bridge or the nitrate bridge in 2 mediates weak antiferromagnetic coupling. The catalytic performance of 1 and 2 has been investigated toward the solvent-free microwave-assisted oxidation of a secondary alcohol (1-phenylethanol used as model substrate). At 120°C and in the presence of the nitroxyl radical 2,2,6,6-tetramethylpiperydil-1-oxyl (TEMPO), the complete conversion of 1-phenylethanol into acetophenone occurs with TOFs up to 1,200 h(−1). Frontiers Media S.A. 2020-03-06 /pmc/articles/PMC7069101/ /pubmed/32211380 http://dx.doi.org/10.3389/fchem.2020.00157 Text en Copyright © 2020 Sutradhar, Alegria, Barman, Guedes da Silva, Liu and Pombeiro. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Sutradhar, Manas
Alegria, Elisabete C. B. A.
Barman, Tannistha Roy
Guedes da Silva, M. Fátima C.
Liu, Cai-Ming
Pombeiro, Armando J. L.
1D Copper(II)-Aroylhydrazone Coordination Polymers: Magnetic Properties and Microwave Assisted Oxidation of a Secondary Alcohol
title 1D Copper(II)-Aroylhydrazone Coordination Polymers: Magnetic Properties and Microwave Assisted Oxidation of a Secondary Alcohol
title_full 1D Copper(II)-Aroylhydrazone Coordination Polymers: Magnetic Properties and Microwave Assisted Oxidation of a Secondary Alcohol
title_fullStr 1D Copper(II)-Aroylhydrazone Coordination Polymers: Magnetic Properties and Microwave Assisted Oxidation of a Secondary Alcohol
title_full_unstemmed 1D Copper(II)-Aroylhydrazone Coordination Polymers: Magnetic Properties and Microwave Assisted Oxidation of a Secondary Alcohol
title_short 1D Copper(II)-Aroylhydrazone Coordination Polymers: Magnetic Properties and Microwave Assisted Oxidation of a Secondary Alcohol
title_sort 1d copper(ii)-aroylhydrazone coordination polymers: magnetic properties and microwave assisted oxidation of a secondary alcohol
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7069101/
https://www.ncbi.nlm.nih.gov/pubmed/32211380
http://dx.doi.org/10.3389/fchem.2020.00157
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