1
|
Ismael F, Fleming CL, Christopher TD, Söhnel T, Zhou Y, Krenske EH, Gahan LR, Blackman AG. Co(III) complexes of the pentadentate NHC ligand PY4Im: carbene-induced trans influences and the non-disappearing 13C NMR peak. Dalton Trans 2024. [PMID: 39015102 DOI: 10.1039/d4dt01579g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2024]
Abstract
Co(III) complexes of the N-heterocyclic carbene ligand PY4Im (PY4Im = (1,3-bis(bis(2-pyridyl)methyl)imidazol-2-ylidene)) having the general formula [(PY4Im)Co(X)](ClO4)n (X = NCMe; n = 3: OH-, N3-, NCS-, ONO-, F-; n = 2: O2CO2-, n = 1; (N3-)3, n = 0) were prepared and structurally characterised. X-ray structural data are consistent with the presence of a trans influence due to the coordinated carbene carbon, and this is also supported by computational results. 13C NMR spectra of the complexes did not display peaks corresponding to the carbene carbon, except in the case of the [(PY4Im)Co(O2CO)]+ cation, where a peak at δ = 170.21 ppm was observed. However, HMBC spectra allowed indirect determination of the chemical shifts of the carbene carbon in the remaining complexes, owing to the geometry of the PY4Im ligand. Calculated 13C chemical shifts for the complexes showed very good agreement with the experimental values for all but the carbene carbon atoms in all cases.
Collapse
Affiliation(s)
- Fouad Ismael
- Department of Chemistry, Auckland University of Technology, Private Bag 92006, Auckland 1142, New Zealand.
| | - Cassandra L Fleming
- Department of Chemistry, Auckland University of Technology, Private Bag 92006, Auckland 1142, New Zealand.
- The University of Sydney, Chemistry Building, Eastern Ave, Camperdown, NSW 2050, Australia
| | - Timothy D Christopher
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Tilo Söhnel
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand
| | - Yuchen Zhou
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Elizabeth H Krenske
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Lawrence R Gahan
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Allan G Blackman
- Department of Chemistry, Auckland University of Technology, Private Bag 92006, Auckland 1142, New Zealand.
| |
Collapse
|
2
|
A. H U, Mahesha, K. J P, Harohally NV, Krishnamurthy C, Jathi K, Ahmad A, Alshammari MB, Lokanath NK. Structural Investigation of Schiff Base Ligand and Dinuclear Copper Complex: Synthesis, Crystal Structure, Computational, and Latent Fingerprint Analysis. ACS OMEGA 2024; 9:30109-30119. [PMID: 39035917 PMCID: PMC11256093 DOI: 10.1021/acsomega.3c07536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 06/14/2024] [Accepted: 06/14/2024] [Indexed: 07/23/2024]
Abstract
The structural studies of the fluorinated Schiff base ligand and its copper complex were synthesized and characterized by Fourier transform infrared, UV-visible, and photoluminescence spectroscopy. Single-crystal X-ray diffraction analysis unveils a dinuclear copper complex arising from double bridging acetate anions to copper ions that are chelated by the tridentate Schiff base ligand Cu(LS). The trigonality index τ5 of 0.080 indicates a distorted square pyramidal coordination geometry for the metal. The SL ligand and complex exhibit intra- and intermolecular interactions, leading to unique supramolecular architectures. The structural changes between the free halogenated Schiff base ligand and upon coordination with the metal were extensively studied by experimental and theoretical approaches. The intra- and intermolecular interactions have been analyzed by Hirshfeld surface and quantum theory of atoms in molecules analysis, and the enrichment ratio highlights the most favored interactions in the formation of molecular packing. The chemical and physical properties, such as the HOMO - LUMO energy gap, chemical reactivity, and electron density topology, are studied using density functional theory studies. In addition, the Schiff base ligand compound is used to study the latent fingerprint analysis.
Collapse
Affiliation(s)
- Udaya
Kumar A. H
- Department
of Studies in Physics, University of Mysore, Manasagangotri, Mysuru 570 006, Karnataka, India
| | - Mahesha
- Department
of Physics, SJCE, JSS Science and Technology
University, Mysore 57006, Karnataka, India
| | - Pampa K. J
- Department
of Biotechnology, University of Mysore, Manasagangotri, Mysuru 570 006, Karnataka, India
| | | | - Chethan Krishnamurthy
- Department
of Chemistry, Jnanasahyadri, Kuvempu University, Shivamogg 577451, Karnataka, India
| | - Keshavayya Jathi
- Department
of Chemistry, Jnanasahyadri, Kuvempu University, Shivamogg 577451, Karnataka, India
| | - Akil Ahmad
- Department
of Chemistry, College of Sciences and Humanities, Prince Sattam Bin Abdulaziz University Al-Kharj, Al-Kharj, 11892, Saudi Arabia
| | - Mohammed B. Alshammari
- Department
of Chemistry, College of Sciences and Humanities, Prince Sattam Bin Abdulaziz University Al-Kharj, Al-Kharj, 11892, Saudi Arabia
| | | |
Collapse
|
3
|
Mast M, Schubert H, Mayer HA, Wesemann L. Trianionic Carbocyclic NCN Pincer Ligand: Coordination Chemistry and Reactivity Studies. Inorg Chem 2024; 63:10860-10870. [PMID: 38804041 DOI: 10.1021/acs.inorgchem.4c01602] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
(BCHT-NCN)H3 (1) [1,6-bis(methylene(bis-2,6-diisopropylaniline)(benzo)cycloheptatriene)] was synthesized by nucleophilic substitution treating 1,6-bis(methylenebromide)(benzo)cycloheptatriene with 2 equiv of Li[2,6-iPr2C6H3NH], Li[Dipp-NH]. Triple deprotonation of (BCHT-NCN)H3 (1) using n-BuLi yields the deprotonation product [(BCHT-NCN)Li3] (2), which crystallizes as a dimer [{[BCHT-NCN]Li3(Et2O)2}2] (2)2. Coordination compounds of the trianionic pincer ligand were obtained with SnCl2, YCl3(THF)3.5, and HfCl4(THF)2: [(BCHT-NCN)SnLi] (3), [(BCHT-NCN)Y(THF)2] (4), [(BCHT-NCN)HfCl2][Li(THF)4] (5), respectively. A hafnium hydride complex [(BCHT-NCN)HfH(HBEt3)][K(Et2O)2] (6) was isolated after reaction of 5 with K[HBEt3]. A MeNHC substitution product [(BCHT-NCN)HfCl(MeNHC)] (7) was synthesized treating compound 5 with MeNHC at rt. Following an n-BuLi reaction of 7 gives an alkyl complex [(BCHT-NCN)Hf(n-Bu)(MeNHC)] (8). Thermolysis of 7 yields the isomerization product [(BCHT-NCN#)HfCl(MeNHC)] (9), which was transferred into a methyl complex [(BCHT-NCN#)HfMe(MeNHC)] (10) upon treatment with MeMgBr. Hydride abstraction from complex 9 leads to a cationic complex [(BCHT-NCN+)HfCl(MeNHC)][Al(OtBuF)4] (11).
Collapse
Affiliation(s)
- Maximilian Mast
- Institut für Anorganische Chemie, Eberhard Karls Universität, Tübingen, Auf der Morgenstelle 18, Tübingen 72076, Germany
| | - Hartmut Schubert
- Institut für Anorganische Chemie, Eberhard Karls Universität, Tübingen, Auf der Morgenstelle 18, Tübingen 72076, Germany
| | - Hermann A Mayer
- Institut für Anorganische Chemie, Eberhard Karls Universität, Tübingen, Auf der Morgenstelle 18, Tübingen 72076, Germany
| | - Lars Wesemann
- Institut für Anorganische Chemie, Eberhard Karls Universität, Tübingen, Auf der Morgenstelle 18, Tübingen 72076, Germany
| |
Collapse
|
4
|
Shen K, Gennari M, Philouze C, Velić A, Demeshko S, Meyer F, Duboc C. Chromium-Thiolate Complex Undergoing C-S Bond Cleavage. Inorg Chem 2024; 63:9119-9128. [PMID: 38709854 DOI: 10.1021/acs.inorgchem.4c00402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
The cleavage of C-S bonds represents a crucial step in fossil fuel refinement to remove organosulfur impurities. Efforts are required to identify alternatives that can replace the energy-intensive hydrodesulfurization process currently in use. In this context, we have developed a series of bis-thiolato-ligated CrIII complexes supported by the L2- ligand (L2- = 2,2'-bipyridine-6,6'-diyl(bis(1,1-diphenylethanethiolate), one of them displaying desulfurization of one thiolate of the ligand under reducing and acidic conditions at ambient temperature and atmospheric pressure. While only 5-coordinated complexes were previously isolated by reaction of L2- with 3d metal MIII ions, both 5- and 6-coordinated mononuclear complexes have been obtained in the case of CrIII, viz., [CrIIILCl], [CrIIILCl2]-, and [CrIIILCl(CH3CN)]. The investigation of the reactivity of [CrIIILCl(CH3CN)] under reducing conditions led to a dinuclear [CrIII2L2(μ-Cl)(μ-OH)] compound and, in the presence of protons, to the mononuclear CrIII complex [CrIII(LN2S)2]+, where LN2S- is the partially desulfurized form of L2-. A desulfurization mechanism has been proposed involving the release of H2S, as evidenced experimentally.
Collapse
Affiliation(s)
- Kaiji Shen
- Univ. Grenoble Alpes, CNRS UMR 5250, DCM Grenoble F-38000, France
| | - Marcello Gennari
- Univ. Grenoble Alpes, CNRS UMR 5250, DCM Grenoble F-38000, France
| | | | - Ajdin Velić
- University of Göttingen, Institute of Inorganic Chemistry, Tammannstrasse 4, Göttingen D- 37077, Germany
| | - Serhiy Demeshko
- University of Göttingen, Institute of Inorganic Chemistry, Tammannstrasse 4, Göttingen D- 37077, Germany
| | - Franc Meyer
- University of Göttingen, Institute of Inorganic Chemistry, Tammannstrasse 4, Göttingen D- 37077, Germany
| | - Carole Duboc
- Univ. Grenoble Alpes, CNRS UMR 5250, DCM Grenoble F-38000, France
| |
Collapse
|
5
|
Bühler R, Weininger RJJ, Stephan J, Muhr M, Bock BMT, Gemel C, Fischer RA. Homoleptic hexa- and penta-coordinated gallium(I) amide complexes of ruthenium and molybdenum. Dalton Trans 2024. [PMID: 38687113 DOI: 10.1039/d4dt00823e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Reaction of neutral olefin complexes of ruthenium and molybdenum with GaTMP (TMP = 2,2,6,6-tetramethylpiperidinyl) by substitution leads to the formation of respective five- and six-coordinated homoleptic products. [Ru(GaTMP)5] (1) and [Mo(GaTMP)6] (2) were isolated and characterized. Core structure geometries were analyzed using continuous shape measure, and the complexes were subjected to DFT calculations unveiling competing π-interactions between the transition metal center and the amido substituent with the unoccupied pπ orbitals of the gallium.
Collapse
Affiliation(s)
- Raphael Bühler
- Chair of Inorganic and Metalorganic Chemistry, Technical University of Munich, School of Natural Sciences, Department of Chemistry, Lichtenbergstraße 4, 85748 Garching, Germany and Catalysis Research Center, Erst-Otto-Fischer-Straße 1, 85748 Garching, Germany.
| | - Richard J J Weininger
- Chair of Inorganic and Metalorganic Chemistry, Technical University of Munich, School of Natural Sciences, Department of Chemistry, Lichtenbergstraße 4, 85748 Garching, Germany and Catalysis Research Center, Erst-Otto-Fischer-Straße 1, 85748 Garching, Germany.
| | - Johannes Stephan
- Chair of Inorganic and Metalorganic Chemistry, Technical University of Munich, School of Natural Sciences, Department of Chemistry, Lichtenbergstraße 4, 85748 Garching, Germany and Catalysis Research Center, Erst-Otto-Fischer-Straße 1, 85748 Garching, Germany.
| | - Maximilian Muhr
- Chair of Inorganic and Metalorganic Chemistry, Technical University of Munich, School of Natural Sciences, Department of Chemistry, Lichtenbergstraße 4, 85748 Garching, Germany and Catalysis Research Center, Erst-Otto-Fischer-Straße 1, 85748 Garching, Germany.
| | - Balasai M-T Bock
- Chair of Inorganic and Metalorganic Chemistry, Technical University of Munich, School of Natural Sciences, Department of Chemistry, Lichtenbergstraße 4, 85748 Garching, Germany and Catalysis Research Center, Erst-Otto-Fischer-Straße 1, 85748 Garching, Germany.
| | - Christian Gemel
- Chair of Inorganic and Metalorganic Chemistry, Technical University of Munich, School of Natural Sciences, Department of Chemistry, Lichtenbergstraße 4, 85748 Garching, Germany and Catalysis Research Center, Erst-Otto-Fischer-Straße 1, 85748 Garching, Germany.
| | - Roland A Fischer
- Chair of Inorganic and Metalorganic Chemistry, Technical University of Munich, School of Natural Sciences, Department of Chemistry, Lichtenbergstraße 4, 85748 Garching, Germany and Catalysis Research Center, Erst-Otto-Fischer-Straße 1, 85748 Garching, Germany.
| |
Collapse
|
6
|
Heim P, Biswas S, Lopez H, Gericke R, Twamley B, McDonald AR. A Co II-Hydroxide Complex That Converts Directly to a Co II-Acetamide during Catalytic Nitrile Hydration. Inorg Chem 2024; 63:7896-7902. [PMID: 38607349 PMCID: PMC11061833 DOI: 10.1021/acs.inorgchem.4c00754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 03/25/2024] [Accepted: 04/01/2024] [Indexed: 04/13/2024]
Abstract
In exploring structural and functional mimics of nitrile hydratases, we report the synthesis of the pseudo-trigonal bipyramidal CoII complexes (K)[CoII(DMF)(LPh)] (1(DMF)), (NMe4)2[CoII(OAc)(LPh)] (1(OAc)), and (NMe4)2[CoII(OH)(LPh)] (1(OH)) (LPh = 2,2',2''-nitrilo-tris-(N-phenylacetamide; DMF = N,N-dimethylformamide; -OAc = acetate)). The complexes were characterized using NMR, FT-IR, ESI-MS, electronic absorption spectroscopy, and X-ray crystallography, showing the LPh ligand to bind in a tetradentate tripodal fashion alongside the respective ancillary donor. One of the complexes, 1(OH), is an unusual structural and functional mimic of the Co active site in Co nitrile hydratases. 1(OH) reacted with acetonitrile to yield the CoII-acetamide complex (NMe4)2[CoII(NHC(O)CH3)(LPh)], 2, which was also thoroughly characterized. In the presence of excess hydroxide, 1(OH) was found to catalyze quantitative conversion of the added hydroxide into acetamide. Despite the differences in Co oxidation state in nitrile hydratases and 1(OH) (CoIII versus CoII, respectively), 1(OH) was nonetheless an effective nitrile hydration catalyst, selectively producing acetamide over multiple turnovers.
Collapse
Affiliation(s)
- Philipp Heim
- School
of Chemistry, Trinity College Dublin, The
University of Dublin, College Green, Dublin 2, Ireland
| | - Sachidulal Biswas
- School
of Chemistry, Trinity College Dublin, The
University of Dublin, College Green, Dublin 2, Ireland
| | - Hugo Lopez
- School
of Chemistry, Trinity College Dublin, The
University of Dublin, College Green, Dublin 2, Ireland
| | - Robert Gericke
- School
of Chemistry, Trinity College Dublin, The
University of Dublin, College Green, Dublin 2, Ireland
- Helmholtz-Zentrum
Dresden-Rossendorf e.V., Institute of Resource
Ecology, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Brendan Twamley
- School
of Chemistry, Trinity College Dublin, The
University of Dublin, College Green, Dublin 2, Ireland
| | - Aidan R. McDonald
- School
of Chemistry, Trinity College Dublin, The
University of Dublin, College Green, Dublin 2, Ireland
| |
Collapse
|
7
|
Bhunia S, Das M, Banerjee S, Drew MGB, Ray PP, Chattopadhyay S. Application of a distinctly bent, trinuclear, end-to-end azide bridged, mixed valence cobalt(iii/ii/iii) complex in the fabrication of photosensitive Schottky barrier diodes. RSC Adv 2024; 14:11185-11196. [PMID: 38590349 PMCID: PMC11000096 DOI: 10.1039/d4ra01406e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 03/16/2024] [Indexed: 04/10/2024] Open
Abstract
A mixed-valence trinuclear cobalt(iii)-cobalt(ii)-cobalt(iii) complex, [(μ-1,3-N3)Co3L(N3)3]·MeOH has been synthesized using a tetradentate N2O2 donor 'reduced Schiff base' ligand, H2L {1,3-bis(2-hydroxybenzylamino)2,2-dimethylpropane} and azide as anionic co-ligand. The complex has been characterised by elemental analysis, IR, UV-vis spectroscopy and single-crystal X-ray diffraction studies etc. The cobalt(iii)-cobalt(ii)-cobalt(iii) skeleton in the complex is non-linear and non-centrosymmetric. The redox behavior of the complex was studied by using Cyclic Voltammetry (CV). The complex is found to be a semiconductor material as confirmed by determining the band gap of this complex by experimental as well as theoretical studies. The band gap in the solid state has been determined experimentally. The conductivity of the synthesized complex based device improves considerably in illumination conditions from the non-illuminated conditions. The complex has also been used to fabricate Schottky barrier diodes.
Collapse
Affiliation(s)
- Sudip Bhunia
- Department of Chemistry, Inorganic Section, Jadavpur University Kolkata 700032 India +91 3324572941
| | - Mainak Das
- Department of Physics, Jadavpur University Kolkata 700032 India +91 3324138917
| | - Snehasis Banerjee
- Department of Higher Education, (University Branch) Government of West Bengal Bikash Bhavan, Salt Lake Kolkata-91 India
| | - Michael G B Drew
- School of Chemistry, The University of Reading P. O. Box 224, Whiteknights Reading RG6 6AD UK
| | - Partha Pratim Ray
- Department of Physics, Jadavpur University Kolkata 700032 India +91 3324138917
| | - Shouvik Chattopadhyay
- Department of Chemistry, Inorganic Section, Jadavpur University Kolkata 700032 India +91 3324572941
| |
Collapse
|
8
|
Hulushe ST, Watkins GM, Khanye SD. Enhanced Catalytic Activity of a Copper(II) Metal-Organic Framework Constructed via Semireversible Single-Crystal-to-Single-Crystal Dehydration. ACS OMEGA 2024; 9:7511-7528. [PMID: 38405543 PMCID: PMC10882598 DOI: 10.1021/acsomega.3c05999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 12/15/2023] [Accepted: 01/05/2024] [Indexed: 02/27/2024]
Abstract
Herein, we present a copper(II) metal-organic framework, [Cu2(btec)(OH2)4]·2H2O (1) [(btec)4- = 1,2,4,5-benzenetetracarboxylate], that undergoes single-crystal-to-single-crystal transformations into two anhydrous phases 2' and 2″ with the chemical formula [Cu2(btec)], triggered by two-step dehydration at 403 and 433 K, respectively. After immersion in water for 3 days at room temperature, 2' transformed into [Cu2(btec)(OH2)] (3), while both 2' and 2″ took 1 week to revert to 1. Dynamic vapor sorption studies validated water-induced reversible structural transformations at 70% relative humidity (RH). According to single-crystal X-ray diffraction (SC-XRD), the local coordination geometry of the Cu2+ ion in 2' changed from a saturated octahedron to a coordinatively unsaturated square-based pyramid in 3, manifested by changes in color and dimensionality. From a topological point of view, all of the scaffolds show a binodal (3,6)-connected kgd topology with the point symbol {43}2{46}. In addition, the materials were thoroughly characterized using routine spectroscopic data and various analytical techniques. The catalytic activity of the microporous materials in the liquid-phase oxidation of styrene in acetonitrile, using 30% (wt) H2O2 as the oxidant, was investigated. The excellent performance of the monohydrous phase 3 was shown to be superior to the pristine framework and the anhydrous counterparts, as evidenced by a good turnover number (TON) and turnover frequency (TOF) = 82.6 and 21.0 h-1, respectively. Within 4 h, the substrates were catalytically oxidized to the desired products with up to 67% conversion and 100% benzaldehyde selectivity. It is worth noting that the accessible active metal sites and higher surface area enhanced the catalytic properties of 3. Furthermore, the maintenance of catalytic efficiency over five cycles and reusability are illustrated and discussed in terms of the structural differences of the microporous frameworks. Thus, a preliminary reaction mechanism for the selective oxidation of styrene is proposed. This study not only provides a fascinating example of MOF chromism achieved by thermal activation and rehydration but also sheds some light on the relationship between pore-surface- or metal-engineered sites in MOFs and their heterogeneous catalytic performances.
Collapse
Affiliation(s)
- Siya T. Hulushe
- Department
of Chemistry, Rhodes University, Makhanda 6139, South Africa
| | - Gareth M. Watkins
- Department
of Chemistry, Rhodes University, Makhanda 6139, South Africa
| | - Setshaba D. Khanye
- Division
of Pharmaceutical Chemistry, Faculty of Pharmacy, Rhodes University, Makhanda 6139, South Africa
| |
Collapse
|
9
|
Mathur S, Karumban KS, Muley A, Tuti N, Shaji UP, Roy I, Verma A, Kumawat MK, Roy A, Maji S. Chromophore appended DPA-based copper(II) complexes with a diimine motif towards DNA binding and fragmentation studies. Dalton Trans 2024; 53:1163-1177. [PMID: 38105760 DOI: 10.1039/d3dt01864d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Mixed ligand copper(II) complexes [Cu(L1)(bpy)](ClO4)21 and [Cu(L2)(bpy)](ClO4)22 (where L1 = 1-(anthracen-9-yl)-N,N-bis(pyridin-2-ylmethyl)methanamine, L2 = 1-(pyren-1-yl)-N,N-bis(pyridin-2-ylmethyl)methanamine and bpy = 2,2'-bipyridine) were synthesised and characterised thoroughly via different analytical and spectroscopic techniques i.e., UV-vis spectroscopy, fluorescence spectroscopy, FT-IR spectroscopy, HRMS and EPR spectroscopy. The molecular structures of the synthesised complexes were obtained using the single-crystal X-ray diffraction technique. Both complexes exhibited penta-coordinated and acquired distorted square pyramidal geometry. The redox behaviour of complexes 1 and 2 was investigated by employing cyclic voltammetry. The DNA binding study was carried out by UV-vis spectrophotometry using double-stranded salmon sperm DNA (ds-ss-DNA). The binding constant (Kb) values of 1 and 2 were 0.11 × 104 M-1 and 1.05 × 104 M-1, respectively, which indicates that 2 has better binding ability than 1. This might be due to the higher conjugative abilities with the extended surface area of the aromatic pyrene ring compared to the anthracene moiety. The fluorescence quenching experiments were also performed with EB bound DNA (EB-DNA) and Stern-Volmer constant (KSV) values were calculated as 1.23 × 105 M-1 and 1.39 × 105 M-1 for 1 and 2, respectively, suggesting that 2 showed stronger interaction with ss-DNA than 1. The molecular docking data support the DNA-binding studies, with the sites and mode of interactions against B-DNA varying with 1 and 2. Evaluation of the DNA binding properties of the complexes to linearized plasmid DNA indicated that 2 had modest DNA binding properties, which is a pre-requisite for a genotoxic agent. The effect of 1 and 2 on cell survival was analysed using HeLa cells by MTT assay and it was observed that the IC50 values of 1 and 2 were 43.7 μM and 18.6 μM, respectively. Our study paves the way for the designing of bio-inspired novel mixed metal complexes, which shows promising results for further exploration of molecular and mechanistic studies towards the development of non-platinum based economical metallodrugs.
Collapse
Affiliation(s)
- Shobhit Mathur
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | - Kalai Selvan Karumban
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | - Arabinda Muley
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | - Nikhil Tuti
- Department of Biotechnology, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | | | - Indrajit Roy
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | - Anushka Verma
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | - Manoj Kumar Kumawat
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | - Anindya Roy
- Department of Biotechnology, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| | - Somnath Maji
- Department of Chemistry, Indian Institute of Technology, Hyderabad, Kandi, Sangareddy 502284, Telangana, India.
| |
Collapse
|
10
|
Dey A, Ali J, Moorthy S, Gonzalez JF, Pointillart F, Singh SK, Chandrasekhar V. Field induced single ion magnet behavior in Co II complexes in a distorted square pyramidal geometry. Dalton Trans 2023; 52:14807-14821. [PMID: 37791680 DOI: 10.1039/d3dt01769a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
We report three CoII-based complexes with the general formula [CoII(L)(X)2] by changing the halide/pseudo-halide ions [X = NCSe (1SeCN); Cl (2Cl) and Br (3Br)]. The obtained τ5 and CShM values confirm a distorted square pyramidal geometry around the CoII ion in all these complexes. In these three complexes, the central CoII ion is situated above the basal plane of the square pyramidal geometry. The extent of distortion from the ideal SPY-5 geometry differs upon changing the coordinating halide/pseudo-halide ion in these complexes. This essentially results in the alteration of the anisotropic parameter D and hence impacts the magnetic properties in these complexes. This phenomenon has been corroborated with the aid of theoretical investigations. All these complexes display field-induced SIM behaviour with magnetic relaxation occurring through a combination of processes depending on the applied dc magnetic field values and dilution.
Collapse
Affiliation(s)
- Atanu Dey
- Department of Chemistry, Gandhi Institute of Technology and Management (GITAM), NH 207, Nagadenehalli, Doddaballapur Taluk, Bengaluru 561203, India.
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad, 500 046, India.
| | - Junaid Ali
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad, 500 046, India.
| | - Shruti Moorthy
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, 502285, Telangana, India.
| | - Jessica Flores Gonzalez
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, 35000 Rennes, France.
| | - Fabrice Pointillart
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) - UMR 6226, 35000 Rennes, France.
| | - Saurabh Kumar Singh
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy, 502285, Telangana, India.
| | - Vadapalli Chandrasekhar
- Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad, 500 046, India.
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| |
Collapse
|
11
|
Das A, Sankaralingam M. Are Zn(II) pincer complexes efficient apoptosis inducers? a deep insight into their activity against A549 lung cancer cells. Dalton Trans 2023; 52:14465-14476. [PMID: 37772631 DOI: 10.1039/d3dt02419a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
To expand the array of chemotherapeutic drugs, earth-abundant metal complexes are found to be the future direction. In this regard, new zinc(II) complexes 1-3 of 8-aminoquinoline-based pincer ligands were synthesized, characterized and tested for their anticancer activity. The IC50 values of these complexes were estimated by an MTT assay to be 16.35-17.95 μM and 33.35-40 μM against A549 lung and MCF-7 breast cancer cells respectively. Among them, 3 was slightly better than the other complexes and, thus, subjected to detailed studies. Moreover, the ligand corresponding to 3 was less active against both the cell lines than the complex. Further, 3 showed no toxicity against normal fibroblast cell line L929, which instantly elevated the drug characteristic of our complex. An AO-EB staining assay revealed that 3 can induce apoptosis in A549, and it was quantified by flow cytometry as 22.77%. Moreover, the depolarization of the mitochondrial membrane potential determined by JC-1 staining indicated excess ROS production sites in the mitochondria, which was confirmed by carboxy-H2DCFDA staining. Interestingly, the present complexes show better activity than that of the standard drug cisplatin against A549 cells. Overall, the studies provided promising results that can be extended for clinical applications.
Collapse
Affiliation(s)
- Athulya Das
- Bioinspired & Biomimetic Inorganic Chemistry Laboratory, Department of Chemistry, National Institute of Technology Calicut, Kozhikode-673601, Kerala, India.
| | - Muniyandi Sankaralingam
- Bioinspired & Biomimetic Inorganic Chemistry Laboratory, Department of Chemistry, National Institute of Technology Calicut, Kozhikode-673601, Kerala, India.
| |
Collapse
|
12
|
Naher M, Su C, Harmer JR, Williams CM, Bernhardt PV. Electrocatalytic Atom Transfer Radical Addition with Turbocharged Organocopper(II) Complexes. Inorg Chem 2023; 62:15575-15583. [PMID: 37712595 DOI: 10.1021/acs.inorgchem.3c02106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/16/2023]
Abstract
The utility and scope of Cu-catalyzed halogen atom transfer chemistry have been exploited in the fields of atom transfer radical polymerization and atom transfer radical addition, where the metal plays a key role in radical formation and minimizing unwanted side reactions. We have shown that electrochemistry can be employed to modulate the reactivity of the Cu catalyst between its active (CuI) and dormant (CuII) states in a variety of ligand systems. In this work, a macrocyclic pyridinophane ligand (L1) was utilized, which can break the C-Br bond of BrCH2CN to release •CH2CN radicals when in complex with CuI. Moreover, the [CuI(L1)]+ complex can capture the •CH2CN radical to form a new species [CuII(L1)(CH2CN)]+ in situ that, on reduction, exhibits halogen atom transfer reactivity 3 orders of magnitude greater than its parent complex [CuI(L1)]+. This unprecedented rate acceleration has been identified by electrochemistry, successfully reproduced by simulation, and exploited in a Cu-catalyzed bulk electrosynthesis where [CuII(L1)(CH2CN)]+ participates as a radical donor in the atom transfer radical addition of BrCH2CN to a selection of styrenes. The formation of these turbocharged catalysts in situ during electrosynthesis offers a new approach to the Cu-catalyzed organic reaction methodology.
Collapse
Affiliation(s)
- Masnun Naher
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Chuyi Su
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Jeffrey R Harmer
- Centre for Advanced Imaging, University of Queensland, Brisbane 4072, Australia
| | - Craig M Williams
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| |
Collapse
|
13
|
Mousavi H, García-Rubiño ME, Choquesillo-Lazarte D, Castiñeiras A, Lezama L, Frontera A, Niclós-Gutiérrez J. H(N3)dap (Hdap = 2,6-Diaminopurine) Recognition by Cu 2(EGTA): Structure, Physical Properties, and Density Functional Theory Calculations of [Cu 4(μ-EGTA) 2(μ-H(N3)dap) 2(H 2O) 2]·7H 2O. Molecules 2023; 28:6263. [PMID: 37687091 PMCID: PMC10488833 DOI: 10.3390/molecules28176263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 08/22/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
Reactions in water between the Cu2(µ-EGTA) chelate (EGTA = ethylene-bis(oxyethyleneimino)tetraacetate(4-) ion) and Hdap in molar ratios 1:1 and 1:2 yield only blue crystals of the ternary compound [Cu4(μ-EGTA)2(μ-H(N3)dap)2(H2O)2]·7H2O (1), which has been studied via single-crystal X-ray diffraction and various physical methods (thermal stability, spectral and magnetic properties), as well as DFT theoretical calculations. In the crystal, uncoordinated water is disordered. The tetranuclear complex molecule also has some irrelevant disorder in an EGTA-ethylene moiety. In the complex molecule, both bridging organic molecules act as binucleating ligands. There are two distorted five- and two six-coordinated Cu(II) centers. Each half of EGTA acts as a tripodal tetradentate Cu(II) chelator, with a mer-NO2 + O(ether, distal) conformation. Hdap exhibits the tautomer H(N3)dap, with the dissociable H-atom on its less basic N-heterocyclic atom. These features favor the efficient cooperation between Cu-N7 or Cu-N9 bonds with appropriate O-EGTA atoms, as N6-H···O or N3-H···O interligand interactions, respectively. The bridging role of both organics determines the tetranuclear dimensionality of the complex. In this crystal, such molecules associate in zig-zag chains built by alternating π-π interactions between the five- or six-atom rings of Hdap ligands of adjacent molecules. DFT theoretical calculations (using two different theoretical models and characterized by the quantum theory of "atoms in molecules") reveal the importance of these π-π interactions between Hdap ligands, as well as those corresponding to the referred hydrogen bonds in the contributed tetranuclear molecule.
Collapse
Affiliation(s)
- Homa Mousavi
- Department of Inorganic Chemistry, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain;
| | | | - Duane Choquesillo-Lazarte
- Laboratorio de Estudios Cristalográficos, IACT, CSIC-Universidad de Granada, Avda. de las Palmeras 4, 18100 Armilla, Spain;
| | - Alfonso Castiñeiras
- Department of Inorganic Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain;
| | - Luis Lezama
- Departamento de Química Orgánica e Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco, UPV/EHU, 48940 Leioa, Spain;
| | - Antonio Frontera
- Departament de Química, Universitat de les Illes Balears, Crta. de Valldemossa km 7.5, 07122 Palma de Mallorca, Spain;
| | - Juan Niclós-Gutiérrez
- Department of Inorganic Chemistry, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain;
| |
Collapse
|
14
|
Dopp CM, Golwankar RR, Kelsey SR, Douglas JT, Erickson AN, Oliver AG, Day CS, Day VW, Blakemore JD. Vanadyl as a Spectroscopic Probe of Tunable Ligand Donor Strength in Bimetallic Complexes. Inorg Chem 2023. [PMID: 37315176 DOI: 10.1021/acs.inorgchem.3c00724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Incorporation of secondary metal ions into heterobimetallic complexes has emerged as an attractive strategy for rational tuning of compounds' properties and reactivity, but direct solution-phase spectroscopic interrogation of tuning effects has received less attention than it deserves. Here, we report the assembly and study of a series of heterobimetallic complexes containing the vanadyl ion, [VO]2+, paired with monovalent cations (Cs+, Rb+, K+, Na+, and Li+) and a divalent cation (Ca2+). These complexes, which can be isolated in pure form or generated in situ from a common monometallic vanadyl-containing precursor, enable experimental spectroscopic and electrochemical quantification of the influence of the incorporated cations on the properties of the vanadyl moiety. The data reveal systematic shifts in the V-O stretching frequency, isotropic hyperfine coupling constant for the vanadium center, and V(V)/V(IV) reduction potential in the complexes. These shifts can be interpreted as charge density effects parametrized through the Lewis acidities of the cations, suggesting broad potential for the vanadyl ion to serve as a spectroscopic probe in multimetallic species.
Collapse
Affiliation(s)
- Claire M Dopp
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Riddhi R Golwankar
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Shaun R Kelsey
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Justin T Douglas
- Nuclear Magnetic Resonance Laboratory, Molecular Structures Group, University of Kansas, 2034 Becker Dr, Lawrence, Kansas 66047, United States
| | - Alexander N Erickson
- Department of Chemistry, University of Memphis, 3744 Walker Avenue, Memphis, Tennessee 38152, United States
| | - Allen G Oliver
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Cynthia S Day
- Department of Chemistry, Wake Forest University, Winston-Salem, North Carolina 27109, United States
| | - Victor W Day
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - James D Blakemore
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| |
Collapse
|
15
|
La YT, Yan YJ, Li X, Zhang Y, Sun YX, Dong WK. Coordination-Driven Salamo-Salen-Salamo-Type Multinuclear Transition Metal(II) Complexes: Synthesis, Structure, Luminescence, Transformation of Configuration, and Nuclearity Induced by the Acetylacetone Anion. Inorg Chem 2023. [PMID: 37311103 DOI: 10.1021/acs.inorgchem.3c01149] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A flexible polydentate Salamo-Salen-Salamo hybrid ligand H4L was designed and synthesized, which has rich pockets (salamo and salen pockets) so that it may have fascinating coordination patterns with transition metal(II) ions. Four multinuclear transition metal(II) complexes, novel butterfly-shaped homotetranuclear [Ni4(L)(μ1-OAc)2(μ1,3-OAc)2(H2O)0.5(CH3CH2OH)3.5]·4CH3CH2OH (1), helical homotrinuclear [Zn3(L)(μ1-OAc)2]·2CH3CH2OH (2), double-helical homotrinuclear [Cu2(H2L)2]·2CH3CN (3), and mononuclear [Ni(H2L)]·1.5CH3COCH3 (4), have been synthesized and characterized by single-crystal X-ray diffraction. The effects of different anions [OAc- and (O2C5H7)2-] on the complexation behavior of H4L with transition metal(II) ions were studied by UV-vis spectrophotometry. The fluorescent properties of the four complexes were studied with zebrafish, which are expected to be a potential light-emitting material. Ultimately, interaction region indicator (IRI) valuations, Hirshfeld surface analyses, density functional theory (DFT & TD-DFT), electrostatic potential analyses (ESP), and simulations were carried out to further demonstrate the weak interactions and electronic properties of the free ligand and its four complexes.
Collapse
Affiliation(s)
- Ya-Ting La
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
| | - Yuan-Ji Yan
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
| | - Xun Li
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
| | - Yang Zhang
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
| | - Yin-Xia Sun
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
| | - Wen-Kui Dong
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
| |
Collapse
|
16
|
The investigation of modification in structural flexibility and coordination modes in a solvent free β-diketone Cu(II) complex by crystal structure and DFT studies. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
17
|
Kani I. Oxidation of thymol catalysed by a water-soluble Cu(II)-adipate-diphenylamine complex in a biphasic medium. Polyhedron 2023. [DOI: 10.1016/j.poly.2022.116237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
18
|
Gupta P, Drexler HJ, Wingad R, Wass D, Baráth E, Beweries T, Hering-Junghans C. P,N-type phosphaalkene-based Ir( i) complexes: synthesis, coordination chemistry, and catalytic applications. Inorg Chem Front 2023. [DOI: 10.1039/d3qi00142c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
Iridium P,N phosphaalkene complexes show a rich coordination chemistry with unusual twofold C–H activation. The Ir(i) chloride complex can be applied for C–N coupling and alcohol upgrading reactions.
Collapse
|
19
|
Man LL, La YT, Feng LC, Zhang Y, Dong WK. Investigation of syntheses, structures, theoretical calculations, and fluorescence properties of two N 3O-donor half-salamo-type Cu(II) complexes. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2147000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Li-Li Man
- Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou, Gansu, China
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China
| | - Ya-Ting La
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China
| | - Le-Chuan Feng
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China
| | - Yang Zhang
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China
| | - Wen-Kui Dong
- Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou, Gansu, China
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu, China
| |
Collapse
|
20
|
Zhang S, Zhao J, Guo Y, Hu J, Chen X, Ruan H, Cao T, Hou H. Thiosemicarbazone N-Heterocyclic Cu(II) complexes inducing nuclei DNA and mitochondria damage in hepatocellular carcinoma cells. J Inorg Biochem 2022; 236:111964. [PMID: 36027842 DOI: 10.1016/j.jinorgbio.2022.111964] [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: 05/03/2022] [Revised: 08/02/2022] [Accepted: 08/09/2022] [Indexed: 12/15/2022]
Abstract
The α-N-Heterocyclic thiosemicarbazones and their metal complexes have been widely investigated as anticancer and antibacterial agents for their broad spectrum of pharmacological properties. Thus, two thiosemicarbazone-based Cu(II) complexes, [Cu2(ptpc)I2] (1) and [Cu(qtpc)I] (2) with thiosemicarbazone ligand (ptpc = 2-(di(pyridin-2-yl)methylene)-N-(2-(trifluoromethyl)phenyl)-hydrazine-1-carbothioamide, qtpc = 2-(quinolin-8-ylmethylene)-N-(2-(trifluoromethyl)phenyl)hydrazine-1-carbothioamide) were synthesized and evaluated for their biological activities. Complexes 1 and 2 are superior to cisplatin in vitro antiproliferative activities toward hepatocellular carcinoma cell line with the half maximal inhibitory concentration value of 0.2 and 2 μM, respectively. A series of spectroscopic assays and the DNA cleavage experiments showed that both complexes can change and distort the conformation of DNA. Molecular docking experiment further demonstrated that complex 1 binds to DNA mainly in groove mode. Meanwhile, benefiting from their good liposolubility, complexes 1 and 2 could easily enter cells, which further triggers cell cycle arrest and apoptosis. Moreover, complexes 1 and 2 caused serious mitochondrial damage, associating with increased the level of reactive oxygen species (ROS) and Ca2+, decreased adenosine triphosphate (ATP) content and mitochondrial membrane potential (Δψm), and transformed mitochondrial morphology. These findings indicated that complexes 1 and 2 might exert their anticancer activity by inducing DNA and mitochondrial damage simultaneously.
Collapse
Affiliation(s)
- Siye Zhang
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, PR China
| | - Jin'an Zhao
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, PR China; College of chemical engineering and dyeing engineering, Henan University of Engineering, Zhengzhou, 451191, Henan, PR China.
| | - Yan Guo
- College of Material and Chemical Engineering, Henan University of Urban Construction, Pingdingshan 467036, Henan, PR China.
| | - Jiyong Hu
- College of Material and Chemical Engineering, Henan University of Urban Construction, Pingdingshan 467036, Henan, PR China.
| | - Xiaojing Chen
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, PR China
| | - Hehui Ruan
- College of Material and Chemical Engineering, Henan University of Urban Construction, Pingdingshan 467036, Henan, PR China
| | - Tingting Cao
- College of Material and Chemical Engineering, Henan University of Urban Construction, Pingdingshan 467036, Henan, PR China
| | - Hongwei Hou
- College of Chemistry, Zhengzhou University, Zhengzhou 450001, Henan, PR China
| |
Collapse
|
21
|
Adamson TT, Uttley KB, Kelley SP, Bernskoetter WH. Coordination Chemistry of (Triphos)Fe(0) Ethylene Complexes and Their Application to CO 2 Valorization. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tristan T. Adamson
- The Department of Chemistry, The University of Missouri, Columbia, Missouri 65211, United States
| | - Katherine B. Uttley
- The Department of Chemistry, The University of Missouri, Columbia, Missouri 65211, United States
| | - Steven P. Kelley
- The Department of Chemistry, The University of Missouri, Columbia, Missouri 65211, United States
| | - Wesley H. Bernskoetter
- The Department of Chemistry, The University of Missouri, Columbia, Missouri 65211, United States
| |
Collapse
|
22
|
Li SZ, Wei YX, Huang Y, Dong WK. Counteranion-driven self-assembly of di- and tetra-nuclear Zn(II) single‐armed salamo‐type complexes. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133473] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
23
|
Saju A, Griffiths JR, MacMillan SN, Lacy DC. Synthesis of a Bench-Stable Manganese(III) Chloride Compound: Coordination Chemistry and Alkene Dichlorination. J Am Chem Soc 2022; 144:16761-16766. [PMID: 36067378 DOI: 10.1021/jacs.2c08509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The complex [MnCl3(OPPh3)2] (1) is a bench-stable and easily prepared source of MnCl3. It is prepared by treating acetonitrile solvated MnCl3 (2) with Ph3PO and collecting the resulting blue precipitate. 1 is useful in coordination reactions by virtue of the labile Ph3PO ligands, and this is demonstrated through the synthesis of {Tpm*}MnCl3 (3). In addition, methodologies in synthesis that rely on difficult or cumbersome to prepare solutions of reactive MnCl3 can be accomplished using 1 instead. This is demonstrated through alkene dichlorinations in a wide range of solvents, open to air, and with good substrate scope. Light-accelerated halogenation and radical sensitive experiments support a radical mechanism involving stepwise Cl-atom transfer(s) from 1.
Collapse
Affiliation(s)
| | | | - Samantha N MacMillan
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - David C Lacy
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260, United States
| |
Collapse
|
24
|
Li SZ, Tong L, Li X, Dong WK. New insight into two penta-coordinated multinuclear copper(II) single-armed salamo-based complexes. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121047] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
25
|
Gupta P, Taeufer T, Siewert JE, Reiß F, Drexler HJ, Pospech J, Beweries T, Hering-Junghans C. Synthesis, Coordination Chemistry, and Mechanistic Studies of P,N-Type Phosphaalkene-Based Rh(I) Complexes. Inorg Chem 2022; 61:11639-11650. [PMID: 35856631 DOI: 10.1021/acs.inorgchem.2c01158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of P,N-phosphaalkene ligands, py-CH═PMes* (1, py = 2-pyridyl, Mes* = 2,4,6-tBu-C6H2) and the novel quin-CH═PMes* (2, quin = 2-quinolinyl) is described. The reaction with [Rh(μ-Cl)cod]2 produces Rh(I) bis(phosphaalkene) chlorido complexes 3 and 4 with distorted trigonal bipyramidal coordination environments. Complexes 3 and 4 show a pronounced metal-to-ligand charge transfer (MLCT) from Rh into the ligand P═C π* orbitals. Upon heating, quinoline-based complex 4 undergoes twofold C-H bond activation at the o-tBu groups of the Mes* substituents to yield the cationic bis(phosphaindane) Rh(I) complex 5, which could not be observed for the pyridine-based analogue 3. Using sub- or superstoichiometric amounts of AgOTf the C-H bond activation at an o-tBu group of one or at both Mes* was detected, respectively. Density functional theory (DFT) studies suggest an oxidative proton shift pathway as an alternative to a previously reported high-barrier oxidative addition at Rh(I). The Rh(I) mono- and bis(phosphaindane) triflate complexes 6 and 7, respectively, undergo deprotonation at the benzylic CH2 group of the phosphaindane unit in the presence of KOtBu to furnish neutral, distorted square-planar Rh(I) complexes 8 and 9, respectively, with one of the P,N ligands being dearomatized. All complexes were fully characterized, including multinuclear NMR, vibrational, and ultraviolet-visible (UV-vis) spectroscopy, as well as single-crystal X-ray and elemental analysis.
Collapse
Affiliation(s)
- Priyanka Gupta
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Tobias Taeufer
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Jan-Erik Siewert
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Fabian Reiß
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Hans-Joachim Drexler
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Jola Pospech
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Torsten Beweries
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | | |
Collapse
|
26
|
Zhang JQ, Yao GX, Yan YJ, Xu L, Zhang Y, Dong WK. Structurally characterized salamo-based mononuclear Cu(II) complex fluorogenic sensor with high selectivity for CN− and Cys-Cys. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132772] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
27
|
Komuro T, Mochizuki D, Hashimoto H, Tobita H. Iridium and rhodium complexes bearing a silyl-bipyridine pincer ligand: synthesis, structures and catalytic activity for C-H borylation of arenes. Dalton Trans 2022; 51:9983-9987. [PMID: 35735002 DOI: 10.1039/d2dt01227h] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Unsaturated 16-electron iridium and rhodium complexes bearing a silyl-bipyridine-based SiNN-pincer ligand (BpySiNN) were synthesised and characterised by X-ray crystallography and NMR spectroscopy. The iridium-BpySiNN complex facilitated the catalytic C(sp2)-H borylation of arenes to give arylboronate esters in high yields (≥93%) under mild conditions (∼40 °C).
Collapse
Affiliation(s)
- Takashi Komuro
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
| | - Daiki Mochizuki
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
| | - Hisako Hashimoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
| | - Hiromi Tobita
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
| |
Collapse
|
28
|
4-Phenylbutyric acid based homo-heteroleptic Zn(II) carboxylates: Synthesis, structural elucidation, DNA interaction through spectroscopic and computational methods as well as ALP inhibition study. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
29
|
Karumban KS, Raut R, Gupta P, Muley A, Giri B, Kumbhakar S, Misra A, Maji S. Mononuclear cobalt(II) complexes with polypyridyl ligands: Synthesis, characterization, DNA interactions and in vitro cytotoxicity towards human cancer cells. J Inorg Biochem 2022; 233:111866. [DOI: 10.1016/j.jinorgbio.2022.111866] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/28/2022] [Accepted: 05/17/2022] [Indexed: 02/02/2023]
|
30
|
Zhang JQ, Yao GX, La YT, Dong WK. A highly selective bis(salamo)-based fluorescent sensor for two-pronged recognitions to Cu2+ and Arg. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120775] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
31
|
Kavitha B, Sravanthi M, Saritha Reddy P. Studies on DNA binding, cleavage, molecular docking, antimicrobial and anticancer activities of Cr(III), Fe(III), Co(II) and Cu(II) complexes of
o
‐vanillin and fluorobenzamine Schiff base ligand. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6531] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Bengi Kavitha
- Department of Chemistry Osmania University College for Women Hyderabad India
| | | | | |
Collapse
|
32
|
Zars E, Gravogl L, Gau M, Carroll PJ, Meyer K, Mindiola DJ. Iron(II) Mediated Deazotation of Benzyl Azide: Trapping and Subsequent Transformations of the Benzaldimine Fragment. Inorg Chem 2022; 61:1079-1090. [PMID: 34978453 DOI: 10.1021/acs.inorgchem.1c03243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mono-benzaldimine (HN═CHPh) complex [(tBupyrpyrr2)Fe(HN═CHPh)] (1-HN═CHPh) has been prepared by reaction of [(tBupyrpyrr2)Fe(OEt2)] (1-OEt2) (tBupyrpyrr2 = 2,6-bis(3,5-di-tert-butyl-pyrrolyl)pyridine) with one equivalent of benzyl azide. Compound 1-HN═CHPh retains the cis-divacant octahedral coordination geometry akin to 1, as established by single crystal X-ray diffraction study. A bis-HN═CHPh complex [(tBupyrpyrr2)Fe(HN═CHPh)2] (2) was also prepared by the addition of two equivalents of benzyl azide to 1, and its molecular structure exhibits the two HN═CHPh ligands coordinated trans to each other, thereby forming a square pyramidal coordination geometry at the FeII center. Reaction of 1 with excess benzyl azide yields [(tBupyrpyrr2)Fe(HN═CHPh)2·PhCHNCH(NH2)Ph] (2-PhCHNCH(NH2)Ph), which contains an unstable benzylideneamino phenyl methanamine fragment, effectively hydrogen bonded to 2. Thermolysis of 2 or 2-PhCHNCH(NH2)Ph releases the HN═CHPh self-coupling products hydrobenzamide (A), N-benzylidine benzylamine (B), and benzonitrile (C). Under catalytic conditions, free HN═CHPh (cis/trans-HN═CHPh mixture) is produced using 2.5 mol % of 1 in 90% spectroscopic yield. These studies provide a clearer understanding for the conversion of the HN═CHPh in 2 or 2-PhCHNCH(NH2)Ph to the C-C and C-N coupled products. Reduction of 1-HN═CHPh with KC8 yields the reductively coupled benzylamide complex [K(OEt2)]2[(tBupyrpyrr2)2Fe2(μ2-NHCHPhCHPhNH)] (3) as the result of a new C-C bond formed between two radical benzylamide fragments.
Collapse
Affiliation(s)
- Ethan Zars
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Lisa Gravogl
- Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy, Inorganic Chemistry, Egerlandstr. 1, Erlangen 91058, Germany
| | - Michael Gau
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J Carroll
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Karsten Meyer
- Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Department of Chemistry and Pharmacy, Inorganic Chemistry, Egerlandstr. 1, Erlangen 91058, Germany
| | - Daniel J Mindiola
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| |
Collapse
|
33
|
Karumban KS, Muley A, Raut R, Gupta P, Giri B, Kumbhakar S, Misra A, Maji S. Mononuclear Co(II) polypyridyl complexes: synthesis, molecular structure, DNA binding/cleavage, radical scavenging, docking studies and anticancer activities. Dalton Trans 2022; 51:7084-7099. [DOI: 10.1039/d1dt04144d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mononuclear Co(II) complexes [CoII(L)Cl2]; 1, [CoII(L)(bpy)Cl]PF6; 2, [CoII(L)(phen)Cl]PF6; 3 and [CoII(L)(pic)Cl]; 4, (where L = N,N-bis(pyridin-2-ylmethyl)aniline, bpy = 2,2/-bipyridine, phen = 1,10-phenanthroline, pic = picolinic acid) were systematically synthesized and...
Collapse
|
34
|
Multinuclear Co(II) and Zn(II) salamo-based complexes with unique τ5 parameters: Structure characterizations, Hirshfeld surfaces and fluorescence properties. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115615] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
35
|
Okokhere-Edeghoghon B, Neale SE, Hill MS, Mahon MF, McMullin CL. Isocyanate deoxygenation by a molecular magnesium silanide. Dalton Trans 2021; 51:136-144. [PMID: 34866137 DOI: 10.1039/d1dt03775g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The stoichiometric reactivity of a β-diketiminato (BDI) magnesium silanide towards a variety of organic isocyanates has been assessed. While the primary outcome of reactions of t-BuNCO, DippNCO and CyNCO was the production of β-diketiminato magnesium siloxide adducts of the isonitrile resulting from isocyanate deoxygenation, analogous treatment with i-PrNCO led to multiple products, four of which have been positively identified. Although the specificity of this latter reaction was hampered by competitive isocycanate addition at the γ-methine carbon of the BDI supporting ligand, the identification of [{i-PrNCO}CH{(Me)CNDipp}Mg{Me2PhSi}C(O)Ni-Pr]6 provided corroborative evidence for the likely generation of sila-amidate intermediates in all four reactions under study. The formation of [{Me2PhSi}C(O)NR]- anions as the most likely initial species formed en route to isonitrile and siloxide formation was, therefore, validated by a computational density functional theory (DFT) study.
Collapse
Affiliation(s)
| | - Samuel E Neale
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
| | - Michael S Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
| | - Claire L McMullin
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
| |
Collapse
|
36
|
Blackman AG, Jelley RE, Krenske EH, Gahan LR, Bernhardt PV. Does H 3O + Really Act as a Ligand in the Solid State? Inorg Chem 2021; 60:13071-13079. [PMID: 34424671 DOI: 10.1021/acs.inorgchem.1c01485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The evidence for the existence of metal complexes containing H3O+ as a ligand in the solid state is examined. Each of the 68 examples in the Cambridge Structural Database in which H3O+ is bound to a transition metal, lanthanoid, actinoid, or main group metal ion is detailed and critically appraised. It is concluded that none of the reported examples of complexes containing coordinated H3O+ have been unequivocally characterized and that they result from either curation errors or misinterpretations of the crystallographic data. These conclusions are supported by computational techniques, which show that three purported H3O+ complexes based on the 1,4,7,10,13,16,21,24-octa-azabicyclo(8.8.8)hexacosane azacryptand skeleton are better described as aqua complexes, with protonation occurring at the amine ligand.
Collapse
Affiliation(s)
- Allan G Blackman
- Department of Chemistry, Centre for Biomedical and Chemical Sciences, School of Science, Auckland University of Technology, Private Bag 92006, Auckland 1142, New Zealand
| | - Rebecca E Jelley
- School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Elizabeth H Krenske
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Lawrence R Gahan
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| |
Collapse
|
37
|
Pu L, Li P, Li S, Xu W, Long H, Dong W. An investigation of structure, Hirshfeld surface, and fluorescence properties of two dinuclear Ni (II) and Zn (II) salamo‐type complexes. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6397] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Lu‐Mei Pu
- College of Science Gansu Agricultural University Lanzhou China
| | - Peng Li
- School of Chemistry and Chemical Engineering Lanzhou Jiaotong University Lanzhou China
| | - Shi‐Zhen Li
- School of Chemistry and Chemical Engineering Lanzhou Jiaotong University Lanzhou China
| | - Wei‐Bing Xu
- College of Science Gansu Agricultural University Lanzhou China
| | - Hai‐Tao Long
- College of Science Gansu Agricultural University Lanzhou China
| | - Wen‐Kui Dong
- School of Chemistry and Chemical Engineering Lanzhou Jiaotong University Lanzhou China
| |
Collapse
|
38
|
Toda T, Kuwata S. Synthesis, Structures, and Reactivities of Iron Complexes Bearing an Isoindoline‐Based, Polyprotic Pincer‐Type Pyrazole Ligand. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tatsuro Toda
- Department of Chemical Science and Engineering School of Materials and Chemical Technology Tokyo Institute of Technology 2-12-1 E4-1 O-okayama Meguro-ku Tokyo 152-8552 Japan
| | - Shigeki Kuwata
- Department of Chemical Science and Engineering School of Materials and Chemical Technology Tokyo Institute of Technology 2-12-1 E4-1 O-okayama Meguro-ku Tokyo 152-8552 Japan
| |
Collapse
|
39
|
Melville JN, Bernhardt PV. Electrochemical Exploration of Active Cu-Based Atom Transfer Radical Polymerization Catalysis through Ligand Modification. Inorg Chem 2021; 60:9709-9719. [PMID: 34142823 DOI: 10.1021/acs.inorgchem.1c01001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The intersection between Cu-catalyzed atom transfer radical polymerization (ATRP) and organometallic mediated radical polymerization (OMRP) has been recently shown to be a result of competition between the CuI and CuII complexes of polyamine ligands for the same organic free radical. The tetradentate ligands N,N'-bis-2'-pyridylmethyl-ethane-1,2-diamine (L1) and N,N'-dimethyl-N,N'-bis-2'-pyridylmethyl-ethane-1,2-diamine (L2) form stable Cu complexes which, depending on their oxidation state, can either liberate or complex organic radicals. Herein, we show that this process may be affected by subtle changes to the ligand system. Switching from a tertiary amine (L2) to a secondary amine (L1) retains ATRP and OMRP activity through a series of cyclic voltammetry measurements in the presence of the initiator bromoacetonitrile.
Collapse
Affiliation(s)
- Jamie N Melville
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| | - Paul V Bernhardt
- School of Chemistry and Molecular Biosciences, University of Queensland, Brisbane 4072, Australia
| |
Collapse
|
40
|
Butcher RJ, Purdy AP. The crystal structure of the deca-aluminum alkoxide cluster Al 10O 4(OH) 8 L 14 ( L = 1,1,1,3,3,3-hexa-fluoro-propan-2-olate). ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2021; 77:79-82. [PMID: 33614129 PMCID: PMC7869542 DOI: 10.1107/s2056989020016618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 12/22/2020] [Indexed: 11/18/2022]
Abstract
The title centrosymmetric decaaluminum cluster, Al10O4(OH)8(C3HF6O)14, contains two OAl4 units and a central Al2(O)2 bridge. In the title centrosymmetric cluster compound, hexakis(μ2-1,1,1,3,3,3-hexafluoropropan-2-olato)octakis(1,1,1,3,3,3-hexafluoropropan-2-olato)octa-μ2-hydroxido-di-μ4-oxido-di-μ3-oxido-decaaluminium, [Al10(C3HF6O)14(OH)8O4] (C42H22Al10F84O26), there is a central μ4-OAl4 moiety, which has six edges of which three contain μ(O)-1,1,1,3,3,3-hexafluoropropan-2-olate (L) ligands and two contain μ-OH groups each bridging two Al atoms along an edge. The sixth edge is occupied by a group containing a fifth aluminium atom [bis-μ(OH)-, μ3(O)—AlL]. This last μ3(O) group generates a centrosymmetric Al2O2 dimer, thus the μ3(O) atom is linked to two Al atoms in the asymmetric unit as well as a third Al atom through a center of inversion. Three of the hexafluoropropyl groups of the C3HF6O− ligands are disordered and each was refined with two conformations with occupancies of 0.770 (3)/0.230 (3), 0.772 (3)/0.228 (3) and 0.775 (3)/0.225 (3). The five unique Al centers have coordination numbers varying from four to six with bond angles that show considerable distortions from regular geometry: for the four-coordinate atom, τ4′ = 0.886, while three Al atoms are five-coordinate (τ5 values = 0.098, 1.028, and 0.338) and one is distorted six-coordinate with O—Al—O bond angles ranging from 74.22 (9) to 171.59 (12)°. The geometry about the central O atom in the OAl4 block is significantly distorted tetrahedral (τ4′ = 0.630) with Al—O—Al angles ranging from 95.50 (9) to 147.74 (13)°. The extended structure features numerous O—H⋯O, O—H⋯F, C—H⋯O and C—H⋯F hydrogen bonds and short F⋯F contacts.
Collapse
Affiliation(s)
- Ray J Butcher
- Department of Chemistry, Howard University, 525 College Street NW, Washington DC 20059, USA
| | - Andrew P Purdy
- Chemistry Division, Code 6123, Naval Research Laboratory, 4555 Overlook Av, SW, Washington DC 20375-5342, USA
| |
Collapse
|
41
|
Somov NV, Chausov FF, Kazantseva IS, Maratkanova AN, Nikitina MN. Isomorphous series of heterometallic complexes Na4[Cu Co(1-){N(CH2PO3)3}]·13H2O and Na4[Cu Zn(1-){N(CH2PO3)3}]·13H2O (x = 1…0): Synthesis and structural characterization by analysis of 3d-metal coordination polyhedra as compared with isodimorphous series Na4[Cu Ni(1-){N(CH2PO3)3}]·nH2O. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
42
|
Shaikh SA, Bhat SS, Hegde PL, Revankar VK, Kate A, Kirtani D, Kumbhar AA, Kumbar V, Bhat K. Synthesis, structural characterization, protein binding, DNA cleavage and anticancer activity of fluorophore labelled copper( ii) complexes based on 1,8-naphthalimide conjugates. NEW J CHEM 2021. [DOI: 10.1039/d1nj02696h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The synthesized copper complexes have good anticancer activity and induce an apoptotic mode of cell death.
Collapse
Affiliation(s)
- Sabiha A. Shaikh
- Department of Chemistry, Karnatak University, Dharwad-580003, Karnataka, India
| | - Satish S. Bhat
- Department of Chemistry, Karnatak University, Dharwad-580003, Karnataka, India
| | - Pooja L. Hegde
- Department of Chemistry, Karnatak University, Dharwad-580003, Karnataka, India
| | | | - Anup Kate
- Department of Chemistry, Savitribai Phule Pune University, Pune-411007, Maharashtra, India
| | - Deepti Kirtani
- Department of Chemistry, Savitribai Phule Pune University, Pune-411007, Maharashtra, India
| | - Anupa A. Kumbhar
- Department of Chemistry, Savitribai Phule Pune University, Pune-411007, Maharashtra, India
| | - Vijay Kumbar
- Maratha Mandal's Central Research Laboratory, Marathamandal Dental College and Research Centre, Belgaum, Karnataka, India
| | - Kishore Bhat
- Maratha Mandal's Central Research Laboratory, Marathamandal Dental College and Research Centre, Belgaum, Karnataka, India
| |
Collapse
|