1
|
Bio-Inspired Iron Pentadentate Complexes as Dioxygen Activators in the Oxidation of Cyclohexene and Limonene. Molecules 2023; 28:molecules28052240. [PMID: 36903486 PMCID: PMC10004738 DOI: 10.3390/molecules28052240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/24/2023] [Accepted: 02/25/2023] [Indexed: 03/04/2023] Open
Abstract
The use of dioxygen as an oxidant in fine chemicals production is an emerging problem in chemistry for environmental and economical reasons. In acetonitrile, the [(N4Py)FeII]2+ complex, [N4Py-N,N-bis(2-pyridylmethyl)-N-(bis-2-pyridylmethyl)amine] in the presence of the substrate activates dioxygen for the oxygenation of cyclohexene and limonene. Cyclohexane is oxidized mainly to 2-cyclohexen-1-one, and 2-cyclohexen-1-ol, cyclohexene oxide is formed in much smaller amounts. Limonene gives as the main products limonene oxide, carvone, and carveol. Perillaldehyde and perillyl alcohol are also present in the products but to a lesser extent. The investigated system is twice as efficient as the [(bpy)2FeII]2+/O2/cyclohexene system and comparable to the [(bpy)2MnII]2+/O2/limonene system. Using cyclic voltammetry, it has been shown that, when the catalyst, dioxgen, and substrate are present simultaneously in the reaction mixture, the iron(IV) oxo adduct [(N4Py)FeIV=O]2+ is formed, which is the oxidative species. This observation is supported by DFT calculations.
Collapse
|
2
|
Madkour M, Abdelmonem Y, Qazi UY, Javaid R, Vadivel S. Efficient Cr(vi) photoreduction under natural solar irradiation using a novel step-scheme ZnS/SnIn 4S 8 nanoheterostructured photocatalysts. RSC Adv 2021; 11:29433-29440. [PMID: 35492066 PMCID: PMC9040655 DOI: 10.1039/d1ra04649g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/12/2021] [Indexed: 12/15/2022] Open
Abstract
Removal of heavy metal pollutants from water is a challenge to water security and the environment. Therefore, in this work, multinary chalcogenide based nanoheterostructures such as ZnS/SnIn4S8 nanoheterostructure with different loading amounts were prepared. The prepared nanoheterostructures were utilized as photocatalysts for chromium (Cr(vi)) photoreduction. The prepared nanoheterostructures were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), UV-Vis spectroscopy, dynamic light scattering (DLS), and X-ray photoelectron spectroscopy (XPS) and BET measurements. The absorption spectra of the prepared nanoheterostructures revealed that they are widely absorbed in the visible range with bandgap values 2.4–3.5 eV. The photocatalytic activities of prepared nanoheterostructures were studied toward the photoreduction of heavy metal, chromium (Cr(vi)), under irradiation of natural solar light. The ZnS/SnIn4S8 (with ZnS molar ratio 20%) nanoheterostructures results showed a high photocatalytic activity (92.3%) after 120 min which could be attributed to its enhanced charge carrier separation with respect to the bare ZnS and SnIn4S8 NPs. Also, the optoelectronic, valence-band XPS and electrochemical properties of the investigated photocatalysts were studied and the results revealed that the photocatalysts behave the step-scheme mechanism. The recyclability tests revealed a beneficial role of the surface charge in efficient regeneration of the photocatalysts for repeated use. The Cr(vi) photoreduction tests demonstrated an improved photocatalytic activity of SIS and 2Z-SIS to be 61.0% and 92.3% respectively after 120 min. The results indicated the photocatalyst's capability under sun light, allowing for its industrial use.![]()
Collapse
Affiliation(s)
- Metwally Madkour
- Chemistry Department, Faculty of Science, Kuwait University P. O. Box 5969, Safat 13060 Kuwai
| | - Yasser Abdelmonem
- Chemistry Department, Faculty of Science, Menoufia University 32511 Shebin El-Kom Egypt
| | - Umair Yaqub Qazi
- Department of Chemistry, College of Science, University of Hafr Al Batin P. O Box 1803 Hafr Al Batin 39524 Saudi Arabia
| | - Rahat Javaid
- Renewable Energy Research Center, Fukushima Renewable Energy Institute, National Institute of Advanced Industrial Science and Technology, AIST 2-2-9 Machiikedai Koriyama Fukushima 963-0298 Japan
| | - S Vadivel
- Department of Chemistry, PSG College of Technology Coimbatore-641004 India
| |
Collapse
|
3
|
Carli S, Benazzi E, Casarin L, Bernardi T, Bertolasi V, Argazzi R, Caramori S, Bignozzi CA. On the stability of manganese tris(β-diketonate) complexes as redox mediators in DSSCs. Phys Chem Chem Phys 2016; 18:5949-56. [PMID: 26751983 DOI: 10.1039/c5cp05524e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photoelectrochemical properties and stability of dye sensitized solar cells containing Mn(β-diketonato)3 complexes, [Mn(III)(acac)3] () (acac = acetylacetonate), [Mn(III)(CF2)3] () (CF2 = 4,4-difluoro-1-phenylbutanate-1,3-dione), [Mn(III)(DBM)3] () (DBM = dibenzoylmethanate), [Mn(II)(CF2)3]TBA (TBA = tetrabutylammonium) () and [Mn(II)(DBM)3]TBA (), have been evaluated. At room temperature, the complexes undergo ligand exchange with 4-tert-butyl-pyridine, an additive commonly used in the solar device to reduce charge recombination at the photoanode. An increased device stability was achieved by using the Z907 dye and passivating the photoanode with short chain siloxanes. It was also found that the Mn(ii)/(iii) couple is involved in the dye regeneration process, instead of Mn(iii)/(iv) (E1/2 > 1 V vs. SCE) previously indicated in the literature.
Collapse
Affiliation(s)
- Stefano Carli
- Department of Chemical and Pharmaceutical Sciences of the University of Ferrara, Via Fossato di Mortara 17-27, 44121, Ferrara, Italy.
| | - Elisabetta Benazzi
- Department of Chemical and Pharmaceutical Sciences of the University of Ferrara, Via Fossato di Mortara 17-27, 44121, Ferrara, Italy.
| | - Laura Casarin
- Department of Chemical and Pharmaceutical Sciences of the University of Ferrara, Via Fossato di Mortara 17-27, 44121, Ferrara, Italy.
| | - Tatiana Bernardi
- Department of Chemical and Pharmaceutical Sciences of the University of Ferrara, Via Fossato di Mortara 17-27, 44121, Ferrara, Italy.
| | - Valerio Bertolasi
- Department of Chemical and Pharmaceutical Sciences of the University of Ferrara, Via Fossato di Mortara 17-27, 44121, Ferrara, Italy.
| | - Roberto Argazzi
- CNR-ISOF c/o Department of Chemical and Pharmaceutical Sciences of the University of Ferrara, Via Fossato di Mortara 17-27, 44121, Ferrara, Italy
| | - Stefano Caramori
- Department of Chemical and Pharmaceutical Sciences of the University of Ferrara, Via Fossato di Mortara 17-27, 44121, Ferrara, Italy.
| | - Carlo Alberto Bignozzi
- Department of Chemical and Pharmaceutical Sciences of the University of Ferrara, Via Fossato di Mortara 17-27, 44121, Ferrara, Italy.
| |
Collapse
|
4
|
Pariyar A, Vijaykumar G, Bhunia M, Dey SK, Singh SK, Kurungot S, Mandal SK. Switching closed-shell to open-shell phenalenyl: toward designing electroactive materials. J Am Chem Soc 2015; 137:5955-60. [PMID: 25933051 DOI: 10.1021/jacs.5b00272] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Open-shell phenalenyl chemistry started more than half a century back, and the first solid-state phenalenyl radical was realized only 15 years ago highlighting the synthetic challenges associated in stabilizing carbon-based radical chemistry, though it has great promise as building blocks for molecular electronics and multifunctional materials. Alternatively, stable closed-shell phenalenyl has tremendous potential as it can be utilized to create an in situ open-shell state by external spin injection. In the present study, we have designed a closed-shell phenalenyl-based iron(III) complex, Fe(III)(PLY)3 (PLY-H = 9-hydroxyphenalenone) displaying an excellent electrocatalytic property as cathode material for one compartment membraneless H2O2 fuel cell. The power density output of Fe(III)(PLY)3 is nearly 15-fold higher than the structurally related model compound Fe(III)(acac)3 (acac = acetylacetonate) and nearly 140-fold higher than an earlier reported mononuclear Fe(III) complex, Fe(III)(Pc)Cl (Pc = pthalocyaninate), highlighting the role of switchable closed-shell phenalenyl moiety for electron-transfer process in designing electroactive materials.
Collapse
Affiliation(s)
- Anand Pariyar
- †Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Gonela Vijaykumar
- †Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Mrinal Bhunia
- †Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Suman Kr Dey
- †Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| | - Santosh K Singh
- ‡Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
| | - Sreekumar Kurungot
- ‡Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
| | - Swadhin K Mandal
- †Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur 741246, India
| |
Collapse
|
5
|
|
6
|
Wang X, Le M, Lin H, Luan J, Liu G, Liu D. Aminopyridine derivatives controlled the assembly and various properties of Cu–BTC metal–organic frameworks. Dalton Trans 2015; 44:14008-18. [DOI: 10.1039/c5dt01446h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Three Cu(ii) MOFs based on three aminopyridine derivatives and 1,3,5-benzenetricarboxylic acid have been synthesized and characterized. The electrocatalytic and photocatalytic properties of complexes 1–3 have been investigated in detail.
Collapse
Affiliation(s)
- Xiuli Wang
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Mao Le
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Hongyan Lin
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Jian Luan
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Guocheng Liu
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| | - Danna Liu
- Department of Chemistry
- Bohai University
- Jinzhou
- P. R. China
| |
Collapse
|
7
|
Wang XL, Sui FF, Lin HY, Xu C, Liu GC, Zhang JW, Tian AX. Role of aromatic dicarboxylates in the structural diversity of cobalt(ii) and copper(ii) coordination polymers containing a flexible N,N′-di(3-pyridyl)octanediamide ligand. CrystEngComm 2013. [DOI: 10.1039/c3ce40825f] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
8
|
Wang X, Zhao H, Lin H, Liu G, Fang J, Chen B. Renewable New Copper Complex Bulk-Modified Carbon Paste Electrode: Preparation, Electrochemistry, and Electrocatalysis. ELECTROANAL 2008. [DOI: 10.1002/elan.200704146] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|