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El Mahdaoui A, Radi S, Draoui Y, El Massaoudi M, Ouahhoud S, Asehraou A, Bentouhami NE, Saalaoui E, Benabbes R, Robeyns K, Garcia Y. Synthesis, Crystal Structures, Genotoxicity, and Antifungal and Antibacterial Studies of Ni(II) and Cd(II) Pyrazole Amide Coordination Complexes. Molecules 2024; 29:1186. [PMID: 38474698 DOI: 10.3390/molecules29051186] [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: 02/02/2024] [Revised: 02/25/2024] [Accepted: 03/05/2024] [Indexed: 03/14/2024] Open
Abstract
In this study, we synthesized two coordination complexes based on pyrazole-based ligands, namely 1,5-dimethyl-N-phenyl-1H-pyrazole-3-carboxamide (L1) and 1,5-dimethyl-N-propyl-1H-pyrazole-3-carboxamide (L2), with the aim to investigate bio-inorganic properties. Their crystal structures revealed a mononuclear complex [Ni(L1)2](ClO4)2 (C1) and a dinuclear complex [Cd2(L2)2]Cl4 (C2). Very competitive antifungal and anti-Fusarium activities were found compared to the reference standard cycloheximide. Additionally, L1 and L2 present very weak genotoxicity in contrast to the observed increase in genotoxicity for the coordination complexes C1 and C2.
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Affiliation(s)
- Amal El Mahdaoui
- LCAE, Department of Chemistry, Faculty of Sciences, University Mohammed I, Oujda 60000, Morocco
| | - Smaail Radi
- LCAE, Department of Chemistry, Faculty of Sciences, University Mohammed I, Oujda 60000, Morocco
| | - Youssef Draoui
- LCAE, Department of Chemistry, Faculty of Sciences, University Mohammed I, Oujda 60000, Morocco
| | - Mohamed El Massaoudi
- LCAE, Department of Chemistry, Faculty of Sciences, University Mohammed I, Oujda 60000, Morocco
| | - Sabir Ouahhoud
- Laboratory of Bioresource Biotechnology Ethnopharmacology and Health, Faculty of Sciences, University Mohammed I, Oujda 60000, Morocco
- Faculty of Medicine and Pharmacy, University Sultan Moulay Slimane, Beni Mellal 23000, Morocco
| | - Abdeslam Asehraou
- Laboratory of Bioresource Biotechnology Ethnopharmacology and Health, Faculty of Sciences, University Mohammed I, Oujda 60000, Morocco
| | - Nour Eddine Bentouhami
- Laboratory of Bioresource Biotechnology Ethnopharmacology and Health, Faculty of Sciences, University Mohammed I, Oujda 60000, Morocco
| | - Ennouamane Saalaoui
- Laboratory of Bioresource Biotechnology Ethnopharmacology and Health, Faculty of Sciences, University Mohammed I, Oujda 60000, Morocco
| | - Redouane Benabbes
- Laboratory of Bioresource Biotechnology Ethnopharmacology and Health, Faculty of Sciences, University Mohammed I, Oujda 60000, Morocco
| | - Koen Robeyns
- Institute of Condensed Matter and Nanosciences, Molecular Chemistry, Materials and Catalysis (IMCN/MOST), Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Yann Garcia
- Institute of Condensed Matter and Nanosciences, Molecular Chemistry, Materials and Catalysis (IMCN/MOST), Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
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Wei H, Yang C, Bi F, Li B, Xie R, Yu D, Fang S, Hua Z, Wang Q, Yang G. Structure-Controllable and Mass-Produced Glycopolymersomes as a Template of the Carbohydrate@Ag Nanobiohybrid with Inherent Antibacteria and Biofilm Eradication. Biomacromolecules 2024; 25:315-327. [PMID: 38100369 DOI: 10.1021/acs.biomac.3c01003] [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: 12/17/2023]
Abstract
Glycopolymer-supported silver nanoparticles (AgNPs) have demonstrated a promising alternative to antibiotics for the treatment of multidrug-resistant bacteria-infected diseases. In this contribution, we report a class of biohybrid glycopolymersome-supported AgNPs, which are capable of effectively killing multidrug-resistant bacteria and disrupting related biofilms. First of all, glycopolymersomes with controllable structures were massively fabricated through reversible addition-fragmentation chain transfer (RAFT) polymerization-induced self-assembly (PISA) in an aqueous solution driven by complementary hydrogen bonding interaction between the pyridine and amide groups of N-(2-methylpyridine)-acrylamide (MPA) monomers. Subsequently, Ag+ captured by glycopolymersomes through the coordination between pyridine-N and Ag+ was reduced into AgNPs stabilized by glycopolymersomes upon addition of the NaBH4 reducing agent, leading to the formation of the glycopolymersome@AgNPs biohybrid. As a result, they showed a wide-spectrum and enhanced removal of multidrug-resistant bacteria and biofilms compared to naked AgNPs due to the easier adhesion onto the bacterial surface and diffusion into biofilms through the specific protein-carbohydrate recognition. Moreover, the in vivo results revealed that the obtained biohybrid glycopolymersomes not only demonstrated an effective treatment for inhibiting the cariogenic bacteria but also were able to repair the demineralization of caries via accumulating Ca2+ through the recognition between carbohydrates and Ca2+. Furthermore, glycopolymersomes@AgNPs showed quite low in vitro hemolysis and cytotoxicity and almost negligible acute toxicity in vivo. Overall, this type of biohybrid glycopolymersome@AgNPs nanomaterial provides a new avenue for enhanced antibacterial and antibiofilm activities and the effective treatment of oral microbial-infected diseases.
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Affiliation(s)
- Hanchen Wei
- Biomass Molecular Engineering Center and Anhui Provincial Key Laboratory of Microbial Pest Control, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Caiyun Yang
- Biomass Molecular Engineering Center and Anhui Provincial Key Laboratory of Microbial Pest Control, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Feihu Bi
- Biomass Molecular Engineering Center and Anhui Provincial Key Laboratory of Microbial Pest Control, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Bang Li
- College & Hospital of Stomatology, Anhui Medical University, Key Laboratory of Oral Diseases Research of Anhui Province, Periodontal Department, Anhui Stomatology Hospital affiliated to Anhui Medical University, Hefei 230032, China
| | - Rui Xie
- Department of Plant Pathology, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Deshui Yu
- Biomass Molecular Engineering Center and Anhui Provincial Key Laboratory of Microbial Pest Control, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Shuzhen Fang
- Biomass Molecular Engineering Center and Anhui Provincial Key Laboratory of Microbial Pest Control, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Zan Hua
- Biomass Molecular Engineering Center and Anhui Provincial Key Laboratory of Microbial Pest Control, Anhui Agricultural University, Hefei, Anhui 230036, China
| | - Qingqing Wang
- College & Hospital of Stomatology, Anhui Medical University, Key Laboratory of Oral Diseases Research of Anhui Province, Periodontal Department, Anhui Stomatology Hospital affiliated to Anhui Medical University, Hefei 230032, China
| | - Guang Yang
- Biomass Molecular Engineering Center and Anhui Provincial Key Laboratory of Microbial Pest Control, Anhui Agricultural University, Hefei, Anhui 230036, China
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Soldin Ž, Kukovec BM, Debač T, Đaković M, Popović Z. Anion-assisted supramolecular assemblies of zinc(II) complexes with isonicotinamide. Heliyon 2022; 8:e09943. [PMID: 35880001 PMCID: PMC9307440 DOI: 10.1016/j.heliyon.2022.e09943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 05/06/2022] [Accepted: 07/08/2022] [Indexed: 11/18/2022] Open
Abstract
Five zinc(II) coordination compounds, [ZnCl2(isn)2] (1), [ZnBr2(isn)2] (2), [Zn(NO3)2(H2O)(isn)2] (3), [Zn(CH3COO)2(isn)]2 (4) and [Zn(isn)4(H2O)2](ClO4)2 (5) (isn = isonicotinamide), were prepared by the reactions of the isonicotinamide (pyridine-4-carboxamide, isn) and corresponding zinc(II) salts. Their crystal structures were determined by the single-crystal X-ray diffraction method. The coordination environment of zinc(II) is tetrahedral in the compounds containing small halide anions (chloride, bromide), 1 and 2. An expansion of the zinc(II) coordination environment to the octahedral is observed in the presence of the monodentate and bridging nitrate ions in 3. The coordination environments of both zinc(II) ions in dimeric acetate complex 4 is also enlarged in the comparison with 1 and 2, one zinc(II) ion being octahedrally coordinated and the other being pentacoordinated. The zinc(II) ion in 5 also reaches higher coordination environment (octahedral), which is enabled by binding of additional water molecules, since the perchlorate ion is uncoordinated. The supramolecular amide-amide homosynthon R 2 2 ( 8 ) is preserved in the presence of halide, nitrate and acetate ions (1-4), but it is completely disrupted in the crystal packing of 5 due to the presence of the bulky perchlorate anion. Spectroscopic analysis of compounds 1-5 was performed by IR spectroscopy in the solid state and by 13C NMR spectroscopy in the DMSO solutions. The NMR data support a complete decomposition of 3 in the DMSO solution, but 1, 2, 4 and 5 remain unchanged in the solution. Thermal properties of the coordination compounds were also investigated by TGA and DSC methods.
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Affiliation(s)
- Željka Soldin
- Division of General and Inorganic Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
- Corresponding author.
| | - Boris-Marko Kukovec
- Department of Physical Chemistry, Faculty of Chemistry and Technology, University of Split, Ruđera Boškovića 35, HR-21000 Split, Croatia
- Corresponding author.
| | - Tamara Debač
- Elementary School Ferdinandovac, Dravska 66, HR-48356 Ferdinandovac, Croatia
- Elementary School Đurđevac, Ulica Đure Basaričeka 5D, HR-48350 Đurđevac, Croatia
| | - Marijana Đaković
- Division of General and Inorganic Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
| | - Zora Popović
- Division of General and Inorganic Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
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Santra A, Mishra S, Panda SK, Singh AK. ESIPT and PET-based easy-to-synthesize unsymmetrical ligand in the reversible fluorimetric sensing of Al3+ and relay sensing of inorganic and biological phosphates. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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5
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Mukhopadhyay N, Sengupta A, Vijay AK, Lloret F, Mukherjee R. Ni(II) complexes of a new tetradentate NN'N''O picolinoyl-1,2-phenylenediamide-phenolate redox-active ligand at different redox levels. Dalton Trans 2022; 51:9017-9029. [PMID: 35638812 DOI: 10.1039/d2dt01043g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Three square planar nickel(II) complexes of a new asymmetric tetradentate redox-active ligand H3L2 in its deprotonated form, at three redox levels, open-shell semiquinonate(1-) π radical, quinone(0) and closed-shell dianion of its 2-aminophenolate part, have been synthesized. The coordinated ligand provides N (pyridine) and N' and N'' (carboxamide and 1,2-phenylenediamide, respectively) and O (phenolate) donor sites. Cyclic voltammetry on the parent complex [Ni(L2)] 1 in CH2Cl2 established a three-membered electron-transfer series (oxidative response at E1/2 = 0.57 V and reductive response at -0.32 V vs. SCE) consisting of neutral, monocationic and monoanionic [Ni(L2)]z (z = 0, 1+ and 1-). Oxidation of 1 with AgSbF6 affords [Ni(L2)](SbF6) (2) and reduction of 1 with cobaltocene yields [Co(η5-C5H5)2][Ni(L2)] (3). The molecular structures of 1·CH3CN, 2·0.5CH2Cl2 and 3·C6H6 have been determined by X-ray crystallography at 100 K. Characterization by 1H NMR, X-band EPR (gav = 2.006 (solid); 2.008 (CH2Cl2-C6H5CH3 glass); 80 K) and UV-VIS-NIR spectral properties established that 1, 2 and 3 have [NiII{(L2)˙2-}], [NiII{(L2)-}]+/1+ and [NiII{(L2)3-}]-/1- electronic states, respectively. Thus, the redox processes are ligand-centred. While 1 possesses paramagnetic St (total spin) = 1/2, 2 and 3 possess diamagnetic ground-state St = 0. Interestingly, the variable-temperature (2-300 K) magnetic measurement reveals that 1 with the St = 1/2 ground state attains the antiferromagnetic St = 0 state at a very low temperature, due to weak noncovalent interactions via π-π stacking. Density functional theory (DFT) electronic structural calculations at the B3LYP level of theory rationalized the experimental results. In the UV-VIS-NIR spectra, broad absorptions are recorded for 1 and 2 in the range of 800-1600 nm; however, such an absorption is absent for 3. Time-dependent (TD)-DFT calculations provide a very good fit with the experimental spectra and allow us to identify the observed electronic transitions.
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Affiliation(s)
- Narottam Mukhopadhyay
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal 741 246, India
| | - Arunava Sengupta
- Department of Chemistry, Techno India University, West Bengal, Kolkata 700091, India
| | - Aswin Kottapurath Vijay
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, West Bengal 741 246, India
| | - Francesc Lloret
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMOL), Universitat de València, Polígono de la Coma, s/n, 46980 Paterna, València, Spain
| | - Rabindranath Mukherjee
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India.
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Controlled C–H bond activation leads to orthometalation and ring-hydroxylation in Ni(II) and Pd(II) complexes of a common tridentate azophenyl-salicylaldimine ligand. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Li S, Gong C, Zhang Y, Fu S, Wang Z, Lu Y, Gu S, Liu X, Wang L. Transformation of the coordination nanostructures of 4,4',4''-(1,3,5-triazine-2,4,6-triyl) tribenzoic acid molecules on HOPG triggered by the change in the concentration of metal ions. RSC Adv 2022; 12:3892-3896. [PMID: 35425450 PMCID: PMC8981112 DOI: 10.1039/d1ra09073a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 01/22/2022] [Indexed: 11/21/2022] Open
Abstract
The modulation effects of Cu2+/Fe3+ ions on the hydrogen-bonded structure of 4,4',4''-(1,3,5-triazine-2,4,6-triyl) tribenzoic acid (TATB) on a HOPG surface have been investigated at the liquid-solid interface by scanning tunneling microscopy (STM). STM observations directly demonstrated that the self-assembled honeycomb network of TATB has been dramatically transformed after introducing CuCl2/FeCl3 with different concentrations. The metal-organic coordination structures are formed due to the incorporation of the Cu2+/Fe3+ ions. Interestingly, a Cu2+ ion remains coordinated to two COOH groups and only the number of COOH groups involved in coordination doubles when the concentration of Cu2+ ions doubled. A Fe3+ ion changes from coordination to three COOH groups to two COOH groups after increasing the concentration of Fe3+ ions in a mixed solution. Such results suggest that the self-assembled structures of TATB molecules formed by metal-ligand coordination bonds can be effectively adjusted by regulating the concentration of metal ions in a mixed solution, which has rarely been reported before. It explains that the regulatory effect of concentration leads to the diversity of molecular architectures dominated by coordination bonds.
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Affiliation(s)
- Sihao Li
- Department of Physics, Nanchang University Nanchang 330031 China
| | - Caimei Gong
- Department of Physics, Nanchang University Nanchang 330031 China
| | - Yuyang Zhang
- Department of Physics, Nanchang University Nanchang 330031 China
| | - Shizhang Fu
- Department of Physics, Nanchang University Nanchang 330031 China
| | - Zhongping Wang
- Department of Physics, Nanchang University Nanchang 330031 China
| | - Yan Lu
- Department of Physics, Nanchang University Nanchang 330031 China
| | - Siyi Gu
- Department of Physics, Nanchang University Nanchang 330031 China
| | - Xiaoqing Liu
- Department of Physics, Nanchang University Nanchang 330031 China
| | - Li Wang
- Department of Physics, Nanchang University Nanchang 330031 China
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Farajpour B, Alizadeh A. Recent advances in the synthesis of cyclic compounds using α,α-dicyanoolefins as versatile vinylogous nucleophiles. Org Biomol Chem 2022; 20:8366-8394. [DOI: 10.1039/d2ob01551j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This article provides a review of the applications of α,α-dicyanoolefins as versatile vinylogous nucleophiles in the synthesis of various cyclic compounds, covering the literature from the past 13 years.
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Affiliation(s)
- Behnaz Farajpour
- Department of Chemistry, Tarbiat Modares University, P. O. Box 14115-175, Tehran, Iran
| | - Abdolali Alizadeh
- Department of Chemistry, Tarbiat Modares University, P. O. Box 14115-175, Tehran, Iran
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Yadav S, Vijayan P, Gupta R. Ruthenium complexes of N/O/S based multidentate ligands: Structural diversities and catalysis perspectives. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.122081] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Hu M, Liang G, Chen K, Zhu L, Xu M, Wang M, Li J, He L, Zhang Z, Du M. Conjugated bimetallic cobalt/iron polyphthalocyanine as an electrochemical aptasensing platform for impedimetric determination of enrofloxacin in diverse environments. Mikrochim Acta 2021; 188:432. [PMID: 34822036 DOI: 10.1007/s00604-021-05086-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 10/31/2021] [Indexed: 12/13/2022]
Abstract
The synthesis of bimetallic cobalt/iron polyphthalocyanine (represented by polyCoFePc) network via a modified solid-phase synthesis method is described. It was exploited as a platform for anchoring enrofloxacin (ENR)-targeted aptamer strands, thus, fabricating a label-free impedimetric aptasensor for determination of ENR. The polyCoFePc exhibited a porous two-dimensional (2D) conjugated nanostructure and rich functional groups, and showed a superior binding interaction toward aptamer strands as compared to monometallic polyFePc and polyCoPc networks. This finding was attributed to structural defects and increased active binding sites, thereby giving a highly sensitive detection ability toward ENR. By using electrochemical impedance spectroscopy (EIS), the polyCoFePc-based electrochemical aptasensor exhibited an extremely low detection limit of 0.06 fg mL-1 within the ENR concentration from 0.1 fg mL-1 to 100 pg mL-1, along with high selectivity, good reproducibility, and remarkable stability. Interestingly, the constructed polyCoFePc-based aptasensor also demonstrated wide practicability in various environments. The recoveries of ENR spiked into river water, milk, and pork samples ranged within 91.2 - 107.2%, 90.5 - 109.6%, and 91.2 - 102.3%, respectively.
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Affiliation(s)
- Min Hu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Gaolei Liang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Kun Chen
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Lei Zhu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Miaoran Xu
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Minghua Wang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Junguang Li
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Linghao He
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China
| | - Zhihong Zhang
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China.
| | - Miao Du
- College of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, People's Republic of China.
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Panchavarnam S, Sengupta R, Ravikanth M. Bis-Palladium Complex of α-Benzimidazole 9-Pyrrolyl Dipyrromethene: Synthesis, Structure, and Spectral and Catalytic Properties. Inorg Chem 2021; 60:15686-15694. [PMID: 34605630 DOI: 10.1021/acs.inorgchem.1c02353] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new ligand is designed and synthesized in two steps starting from α-formyl 3-pyrrolyl BODIPY. In the first step, the α-formyl 3-pyrrolyl BODIPY was condensed with 1,2-diaminobenzene in toluene at reflux and afforded α-benzimidazole 3-pyrrolyl BODIPY in 16% yield. In the second step, α-benzimidazole 3-pyrrolyl BODIPY was decomplexed upon being treated with Lewis acid AlCl3 and afforded the desired ligand α-benzimidazole 9-pyrrolyl dipyrromethene. However, the ligand was not very stable and reacted further with PdCl2 in CH3CN for 1 h at reflux followed by recrystallization and afforded a novel bis-palladium complex of α-benzimidazole 9-pyrrolyl dipyrromethene in 36% yield. The bis-palladium complex was characterized and studied by high-resolution mass spectrometry, one- and two-dimensional nuclear magnetic resonance, X-ray crystallography, absorption, and density functional theory/time-dependent DFT (DFT/TD-DFT) studies. The X-ray structure revealed that two ligands and two Pd(II) ions were involved in forming a unique complex in which each Pd(II) ion was coordinated to three pyrrole N atoms of the first ligand and the benzimidazole N atom of the second ligand in a distorted square planar geometry. The absorption spectrum of the bis-palladium complex shows ill-defined, broad, and less intense bands in the region of 345-425 nm along with split bands in the higher-wavelength region of 600-630 nm. The bis-palladium complex was nonfluorescent, and the results of DFT/TD-DFT studies were in agreement with the experimental observations. The preliminary studies indicated that the bis-palladium complex can act as an efficient catalyst for coupling different aryl bromides with phenylboronic acid.
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Affiliation(s)
| | - Rima Sengupta
- Indian Institute of Technology, Powai, Mumbai 400076, India
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12
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Liu Y, Luo P, Fu Y, Hao T, Liu X, Ding Q, Peng Y. Recent advances in the tandem annulation of 1,3-enynes to functionalized pyridine and pyrrole derivatives. Beilstein J Org Chem 2021; 17:2462-2476. [PMID: 34630726 PMCID: PMC8474070 DOI: 10.3762/bjoc.17.163] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 09/11/2021] [Indexed: 12/11/2022] Open
Abstract
Great progress has been made in the tandem annulation of enynes in the past few years. This review only presents the corresponding reactions of 1,3-enyne structural motifs to provide the functionalized pyridine and pyrrole derivatives. The functionalization reactions cover iodination, bromination, trifluoromethylation, azidation, carbonylation, arylation, alkylation, selenylation, sulfenylation, amidation, esterification, and hydroxylation. We also briefly introduce the applications of the products and the reaction mechanisms for the synthesis of corresponding N-heterocycles.
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Affiliation(s)
- Yi Liu
- Key Laboratory for Green Chemistry of Jiangxi Province, Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - Puying Luo
- Department of Gynaecology, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, 92 Aiguo Road, Nanchang, Jiangxi, 330006, China
| | - Yang Fu
- Key Laboratory for Green Chemistry of Jiangxi Province, Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - Tianxin Hao
- Key Laboratory for Green Chemistry of Jiangxi Province, Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - Xuan Liu
- Key Laboratory for Green Chemistry of Jiangxi Province, Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - Qiuping Ding
- Key Laboratory for Green Chemistry of Jiangxi Province, Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
| | - Yiyuan Peng
- Key Laboratory for Green Chemistry of Jiangxi Province, Key Laboratory of Functional Small Organic Molecules, Ministry of Education, Jiangxi Normal University, 99 Ziyang Road, Nanchang 330022, China
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Das B, Dolai M, Ghosh A, Dhara A, Mahapatra AD, Chattopadhyay D, Mabhai S, Jana A, Dey S, Misra A. A bio-compatible pyridine-pyrazole hydrazide based compartmental receptor for Al 3+ sensing and its application in cell imaging. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:4266-4279. [PMID: 34591947 DOI: 10.1039/d1ay00963j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
For practical applications, the development of bio-compatible organic molecules as p-block ion chemosensors is critical. Herein, we report the single crystal (SC) of new pyridine-pyrazole derived Al3+ sensor H2PPC [(Z)-N'-(2,3-dihydroxybenzylidene)-5-methyl-1-(pyridin-2-yl)-1H-pyrazole-3-carbohydrazide] as well as its Cu-complex SC. The probe exhibits an "off-on" fluorescence response towards Al3+ ions, and this has been modulated with different solvents. For selective detection of Al3+ ions, a special coordination pocket in the structural backbone is advantageous. The chemosensor exhibits a submicromolar detection level (LOD = 4.78 μM) for Al3+. The density functional theory (DFT) and time-dependent DFT (TD-DFT) calculations of H2PPC and [Al(HPP)2]+ (1) reveal that a change of the structural conformation of probe H2PPC upon complexation causes the pyrazole and pyridine units to create a specific cavity to tether Al3+, and consequently H2PPC proves to be a promising molecule for Al3+ detection. Furthermore, the probe has been successfully used to evaluate Al3+ as a low-cost kit using filter paper strips, and the in situ Al3+ ion imaging in Vero cells as well as A549 cell lines shows the sensor's nuclear envelope penetrability, indicating that it has great potential for biological and environmental applications.
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Affiliation(s)
- Bhriguram Das
- Department of Chemistry, Vidyasagar University, Midnapore, 721102, West Bengal, India.
- Department of Chemistry, Tamralipta Mahavidyalaya, Purba Medinipur, 721636, India.
| | - Malay Dolai
- Department of Chemistry, Prabhat Kumar College, Contai, Purba Medinipur, 721404, West Bengal, India
| | - Avijit Ghosh
- Center for Research in Nanoscience and Nanotechnology, University of Calcutta, Technology Campus, Salt Lake, Kolkata 700106, India
| | - Anamika Dhara
- Department of Chemistry, Hiralal Mazumdar Memorial College for Women, Dakshineswar, North 24 Parganas, Kolkata 700035, India
| | - Ananya Das Mahapatra
- ICMR-Virus Unit, ID & BG Hospital Campus, 57 Dr Suresh C Banerjee Road, Beliaghata, Kolkata 700010, India
| | - Debprasad Chattopadhyay
- ICMR-Virus Unit, ID & BG Hospital Campus, 57 Dr Suresh C Banerjee Road, Beliaghata, Kolkata 700010, India
- ICMR-National Institute of Traditional Medicine, Nehru Nagar, Belagavi 59001, Karnataka, India
| | - Subhabrata Mabhai
- Department of Chemistry, Mahishadal Raj College, Purba Medinipur, 721628, India
| | - Atanu Jana
- Division of Physics and Semiconductor Science, Dongguk University, Seoul, 04620, South Korea.
| | - Satyajit Dey
- Department of Chemistry, Tamralipta Mahavidyalaya, Purba Medinipur, 721636, India.
| | - Ajay Misra
- Department of Chemistry, Vidyasagar University, Midnapore, 721102, West Bengal, India.
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14
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Zaidi M, Hannachi D, Chermette H. Correlation between Second Ionization Potential and Nonlinear Optical Properties of Bivalent Transition-Metal Complexes: A Quantum Chemical Study. Inorg Chem 2021; 60:6616-6632. [PMID: 33844513 DOI: 10.1021/acs.inorgchem.1c00412] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Discovering new materials with excellent nonlinear optical responses has recently become a very interesting research topic in the different domains of materials science. Currently, density functional theory (DFT) has been shown to be a powerful tool in the explanation and prediction of the performance of novel nonlinear optical (NLO) materials. Quantum chemical calculations using DFT/TD-DFT with the B3LYP exchange-correlation functional are reported to study the NLO properties of 26 bivalent transition-metal (TM) complexed by six acyclic hexadentate ligands providing pyridyl/pyrazine-amide-thioether/ether coordination and differing by the nature of the methylene dichalcogenate spacer between the rings. However, the geometry parameters and the theoretically predicted UV-vis absorption spectra of the optimized compounds M(II)Li are in excellent agreement with the experiment, when available, the trends among the nature of the TM, the importance of the ligand spacer, and of the substituents of the pyridine/pyrazine amide ligand are discussed. To the best of our knowledge, our work evidences for the first time that the hyper-polarizability, second harmonic generation, and hyper-Rayleigh scattering response of TM coordination complexes can be correlated to the second ionization potential of metal and spin state of complexes.
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Affiliation(s)
- Meriem Zaidi
- Département de Chimie, Faculté des Sciences, Université de Setif-1, El Bez, 19000 Setif, Algerie
| | - Douniazed Hannachi
- Département de Chimie, Faculté des Sciences, Université de Setif-1, El Bez, 19000 Setif, Algerie.,Laboratoire d'Electrochimie, d'Ingénierie Moléculaire et de Catalyse Redox (LEIMCR), Faculté de Technologie, Université Sétif-1, 19000 Sétif, Algeria
| | - Henry Chermette
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5280, Institut des Sciences Analytiques, 69622 Villeurbanne Cedex, France
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15
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Kumar P, Kumar V, Gupta R. Dipicolinamide and isophthalamide based fluorescent chemosensors: recognition and detection of assorted analytes. Dalton Trans 2021; 49:9544-9555. [PMID: 32627772 DOI: 10.1039/d0dt01508c] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This perspective focuses on a variety of fluorescent receptors based on dipicolinamide and isophthalamide groups and their significant roles in the molecular recognition, sensing and detection of assorted analytes ranging from metal ions, anions, neutral molecules, drugs and explosives. Both the "turn-on" and "turn-off" nature of sensing highlights noteworthy applications in many fields encompassing biological, medicinal, environmental and analytical disciplines.
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Affiliation(s)
- Pramod Kumar
- Department of Chemistry, University of Delhi, Delhi-110007, India.
| | - Vijay Kumar
- Department of Chemistry, University of Delhi, Delhi-110007, India.
| | - Rajeev Gupta
- Department of Chemistry, University of Delhi, Delhi-110007, India.
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16
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Rahimi H, Hosseinzadeh R, Tajbakhsh M. A new and efficient pyridine-2,6-dicarboxamide-based fluorescent and colorimetric chemosensor for sensitive and selective recognition of Pb2+ and Cu2+. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.113049] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Solid-State Structural Transformation and Photoluminescence Properties of Supramolecular Coordination Compounds. Symmetry (Basel) 2021. [DOI: 10.3390/sym13010112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The combination of strong coordination bonds and hydrogen bonding interactions were used to generate a series of supramolecular coordination materials (SCMs), which was achieved by reacting a bis-pyridyl amide ligand, namely N-(4-pyridyl)nicotinamide (4PNA) with copper(II), zinc(II), and cadmium(II) benzoates. The SCMs were structurally characterized using X-ray diffraction and the key intermolecular interactions were identified via Hirshfeld surface analysis. The role of solvent molecules on the supramolecular architecture was analyzed by synthesizing the SCMs in different solvents/solvent mixtures. A solvent-mediated solid-state structural transformation was observed in copper(II) SCMs and we were able to isolate the intermediate form of the crystal-to-crystal transformation process. The luminescence experiments revealed that complexation enhanced the fluorescence properties of 4PNA in the zinc(II) and cadmium(II) SCMs, but a reverse phenomenon was observed in the copper(II) SCMs. This work demonstrated the tuning of supramolecular assembly in coordination compounds as a function of solvents for generating SCMs with diverse properties.
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18
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Khan I, Ibrar A, Zaib S. Alkynoates as Versatile and Powerful Chemical Tools for the Rapid Assembly of Diverse Heterocycles under Transition-Metal Catalysis: Recent Developments and Challenges. Top Curr Chem (Cham) 2021; 379:3. [PMID: 33398642 DOI: 10.1007/s41061-020-00316-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 11/16/2020] [Indexed: 12/15/2022]
Abstract
Heterocycles, heteroaromatics and spirocyclic entities are ubiquitous components of a wide plethora of synthetic drugs, biologically active natural products, marketed pharmaceuticals and agrochemical targets. Recognizing their high proportion in drugs and rich pharmacological potential, these invaluable structural motifs have garnered significant interest, thus enabling the development of efficient catalytic methodologies providing access to architecturally complex and diverse molecules with high atom-economy and low cost. These chemical processes not only allow the formation of diverse heterocycles but also utilize a range of flexible and easily accessible building units in a single operation to discover diversity-oriented synthetic approaches. Alkynoates are significantly important, diverse and powerful building blocks in organic chemistry due to their unique and inherent properties such as the electronic bias on carbon-carbon triple bonds posed by electron-withdrawing groups or the metallic coordination site provided by carbonyl groups. The present review highlights the comprehensive picture of the utility of alkynoates (2007-2019) for the synthesis of various heterocycles (> 50 types) using transition-metal catalysts (Ru, Rh, Pd, Ir, Ag, Au, Pt, Cu, Mn, Fe) in various forms. The valuable function of versatile alkynoates (bearing multifunctional groups) as simple and useful starting materials is explored, thus cyclizing with an array of coupling partners to deliver a broad range of oxygen-, nitrogen-, sulfur-containing heterocycles alongside fused-, and spiro-heterocyclic compounds. In addition, these examples will also focus the scope and reaction limitations, as well as mechanistic investigations into the synthesis of these heterocycles. The biological significance will also be discussed, citing relevant examples of drug molecules highlighting each class of heterocycles. This review summarizes the recent developments in the synthetic methods for the synthesis of various heterocycles using alkynoates as readily available starting materials under transition-metal catalysis.
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Affiliation(s)
- Imtiaz Khan
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
- Manchester Institute of Biotechnology, The University of Manchester, 131 Princess Street, Manchester, M1 7DN, UK.
| | - Aliya Ibrar
- Department of Chemistry, Faculty of Natural Sciences, The University of Haripur, Haripur, KPK-22620, Pakistan
| | - Sumera Zaib
- Department of Biochemistry, Faculty of Life Sciences, University of Central Punjab, Lahore, 54590, Pakistan
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19
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Verhoeven DGA, Albrecht M. Modular O- vs. N-coordination of pyridylidene amide ligands to iron determines activity in alcohol oxidation catalysis. Dalton Trans 2020; 49:17674-17682. [PMID: 33232405 DOI: 10.1039/d0dt02818e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A family of polydentate pyridine-substituted pyridylidene amide (PYA) complexes bound to iron(ii) was developed. The variation of the coordination set from NN-bidentate PYA to tridentate pincer-type pyPYA2 systems (pyPYA2 = 2,6-bis(PYA)pyridine) had a large influence on the binding mode to iron(ii), including a change from the N- to rare O-coordination of the PYA site and a concomitant shift of the predominant ligand resonance structure. These binding mode variations invoke changes in the reactivity of the complexes, which were probed in the peroxide-mediated oxidation of 1-phenylethanol to acetophenone. A comparison with uncomplexed FeCl2 indicated that bidentate NN coordination is unstable and presumably leads to the dissociation of FeCl2. In contrast, the tridentate ligand binding is robust. Remarkably, the tridentate PYA pincer coordination inhibits catalytic activity in the NNN binding mode, while the ONO coordination greatly enhances catalytic performance. Under optimized conditions, the bis-ligated ONO pincer iron complex [Fe(pyPYA2)2][2PF6] reaches full conversion within one hour (0.5 mol% catalyst loading) and under dilute conditions turnover numbers over 20 000 (0.005 mol% catalyst loading).
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Affiliation(s)
- Dide G A Verhoeven
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland.
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20
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Hu Z, Yu W, Liu X, Tang Q, Fang Z, Zhang S. Copper Coordination Polymers of
N
1
,
N
4
‐Bis(pyridin‐2‐ylmethyl)terephthalamide: Synthesis, Structures, DNA Binding and Cleavage, and Catalytic Activity for Oxidation of 1‐Phenylethanol. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhou‐Ping Hu
- School of Chemistry and Chemical Engineering Central South University 410083 Changsha P. R. China
| | - Wei‐Dong Yu
- School of Chemistry and Chemical Engineering Central South University 410083 Changsha P. R. China
| | - Xia Liu
- School of Chemistry and Chemical Engineering Central South University 410083 Changsha P. R. China
| | - Qing Tang
- School of Chemistry and Chemical Engineering Central South University 410083 Changsha P. R. China
| | - Zi‐Wei Fang
- School of Chemistry and Chemical Engineering Central South University 410083 Changsha P. R. China
| | - Shou‐Chun Zhang
- School of Chemistry and Chemical Engineering Central South University 410083 Changsha P. R. China
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21
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Pachisia S, Gupta R. Architectural and catalytic aspects of designer materials built using metalloligands of pyridine-2,6-dicarboxamide based ligands. Dalton Trans 2020; 49:14731-14748. [PMID: 33084678 DOI: 10.1039/d0dt03058a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This perspective presents the design, synthesis and crystal structures of a large number of architectures constructed using assorted metalloligands of pyridine-2,6-dicarboxamide based ligands. The metalloligands offered various appended functional groups, whereas design strategies included varying both their position and number. A combination of these parameters resulted in the development of assorted architectures including discrete trinuclear and tetranuclear complexes as well as 1D/2D/3D coordination polymers. The metalloligand strategy not only assisted in the construction of ordered crystalline materials with varied dimensionalities but also judiciously allowed the incorporation of Lewis acidic and redox-active secondary metals in the resultant architectures. As a result, such designer architectures illustrated their noteworthy role both as homogenous and heterogeneous catalysts in different organic transformation reactions.
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Affiliation(s)
- Sanya Pachisia
- Department of Chemistry, University of Delhi, Delhi - 110007, India.
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22
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Abstract
Pyrazine-based compounds are of great importance in medicinal chemistry. Due to their heteroaromatic nature, they uniquely combine properties of heteroatoms (polar interactions) with the properties of aromatic moieties (nonpolar interactions). This review summarizes results of a systematic analysis of RCSB PDB database focused on important binding interactions of pyrazine-based ligands cocrystallized in protein targets. The most frequent interaction of pyrazine was hydrogen bond to pyrazine nitrogen atom as an acceptor, followed by weak hydrogen bond with pyrazine hydrogen as donor. We also identified intramolecular hydrogen bonds within pyrazine ligands, π-interactions, coordination to metal ions, and few halogen bonds in chloropyrazines. In many cases the binding mode of the pyrazine fragment was complex, involving a combination of several interactions. We conclude that pyrazine as a molecular fragment should not be perceived as a simple aromatic isostere but rather as a readily interacting moiety of drug-like molecules with high potential for interactions to proteins.
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Affiliation(s)
- Martin Juhás
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
| | - Jan Zitko
- Department of Pharmaceutical Chemistry and Pharmaceutical Analysis, Faculty of Pharmacy in Hradec Králové, Charles University, Heyrovského 1203, 500 05 Hradec Králové, Czech Republic
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23
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Wen Q, Tenenholtz S, Shimon LJW, Bar-Elli O, Beck LM, Houben L, Cohen SR, Feldman Y, Oron D, Lahav M, van der Boom ME. Chiral and SHG-Active Metal-Organic Frameworks Formed in Solution and on Surfaces: Uniformity, Morphology Control, Oriented Growth, and Postassembly Functionalization. J Am Chem Soc 2020; 142:14210-14221. [PMID: 32650634 PMCID: PMC7497644 DOI: 10.1021/jacs.0c05384] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
![]()
We
demonstrate the formation of uniform and oriented metal–organic
frameworks using a combination of anion effects and surface chemistry.
Subtle but significant morphological changes result from the nature
of the coordinative counteranion of the following metal salts: NiX2 with X = Br–, Cl–, NO3–, and OAc–. Crystals
could be obtained in solution or by template surface growth. The latter
results in truncated crystals that resemble a half structure of the
solution-grown ones. The oriented surface-bound metal–organic
frameworks (sMOFs) are obtained via a one-step solvothermal approach
rather than in a layer-by-layer approach. The MOFs are grown on Si/SiOx
substrates modified with an organic monolayer or on glass substrates
covered with a transparent conductive oxide (TCO). Regardless of the
different morphologies, the crystallographic packing is nearly identical
and is not affected by the type of anion or by solution versus the
surface chemistry. A propeller-type arrangement of the nonchiral ligands
around the metal center affords a chiral structure with two geometrically
different helical channels in a 2:1 ratio with the same handedness.
To demonstrate the accessibility and porosity of the macroscopically
oriented channels, a chromophore (resorufin sodium salt) was successfully
embedded into the channels of the crystals by diffusion from solution,
resulting in fluorescent crystals. These “colored” crystals displayed polarized emission (red) with a high
polarization ratio because of the alignment of these dyes imposed
by the crystallographic structure. A second-harmonic generation (SHG)
study revealed Kleinman symmetry-forbidden nonlinear optical properties.
These surface-bound and oriented SHG-active MOFs have the potential
for use as single nonlinear optical (NLO) devices.
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24
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Panda C, Sarkar A, Sen Gupta S. Coordination chemistry of carboxamide ‘Nx’ ligands to metal ions for bio-inspired catalysis. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213314] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Patel N, Prajapati A, Jadeja R, Patel R, Patel S, Tripathi I, Dwivedi N, Gupta V, Butcher R. Dioxidovanadium(V) complexes of a tridentate ONO Schiff base ligand: Structural characterization, quantum chemical calculations and in-vitro antidiabetic activity. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114434] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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26
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Reiersølmoen AC, Csókás D, Øien-Ødegaard S, Vanderkooy A, Gupta AK, Carlsson ACC, Orthaber A, Fiksdahl A, Pápai I, Erdélyi M. Catalytic Activity of trans-Bis(pyridine)gold Complexes. J Am Chem Soc 2020; 142:6439-6446. [PMID: 32168451 PMCID: PMC7343288 DOI: 10.1021/jacs.0c01941] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
Gold
catalysis has become one of the fastest growing fields in
chemistry, providing new organic transformations and offering excellent
chemoselectivities under mild reaction conditions. Methodological
developments have been driven by wide applicability in the synthesis
of complex structures, whereas the mechanistic understanding of Au(III)-mediated
processes remains scanty and have become the Achilles’ heel
of methodology development. Herein, the systematic investigation of
the reactivity of bis(pyridine)-ligated Au(III) complexes is presented,
based on NMR spectroscopic, X-ray crystallographic, and DFT data.
The electron density of pyridines modulates the catalytic activity
of Au(III) complexes in propargyl ester cyclopropanation of styrene.
To avoid strain induced by a ligand with a nonoptimal nitrogen–nitrogen
distance, bidentate bis(pyridine)–Au(III) complexes convert
into dimers. For the first time, bis(pyridine)Au(I) complexes are
shown to be catalytically active, with their reactivity being modulated
by strain.
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Affiliation(s)
- Ann Christin Reiersølmoen
- Department of Chemistry, Norwegian University of Science and Technology, Høgskoleringen 5, 7491 Trondheim, Norway
| | - Dániel Csókás
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, H1117 Budapest, Hungary
| | - Sigurd Øien-Ødegaard
- Centre for Material Sciences and Nanotechnology, University of Oslo, Sem Sælands vei 26, 0371 Oslo, Norway
| | - Alan Vanderkooy
- Department of Chemistry, BMC Uppsala University, Husargatan 3, 752 37 Uppsala, Sweden
| | - Arvind Kumar Gupta
- Department of Organic Chemistry - Ångström Laboratory, Uppsala University, Lägerhyddsvägen 1, 751 20 Uppsala, Sweden
| | - Anna-Carin C Carlsson
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - Andreas Orthaber
- Department of Organic Chemistry - Ångström Laboratory, Uppsala University, Lägerhyddsvägen 1, 751 20 Uppsala, Sweden
| | - Anne Fiksdahl
- Department of Chemistry, Norwegian University of Science and Technology, Høgskoleringen 5, 7491 Trondheim, Norway
| | - Imre Pápai
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, H1117 Budapest, Hungary.,Department of Chemistry, University J. Selyeho, 94505 Komárno, Slovakia
| | - Máté Erdélyi
- Department of Chemistry, BMC Uppsala University, Husargatan 3, 752 37 Uppsala, Sweden
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27
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Vijayan P, Yadav S, Yadav S, Gupta R. Ruthenium(II) complexes of pyridine-carboxamide ligands bearing appended benzothiazole/benzimidazole rings: Structural diversity and catalysis. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119285] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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28
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Ion recognition properties of new pyridine-2,6-dicarboxamide bearing propeller-like pendant residues: multi-spectroscopic approach. MONATSHEFTE FUR CHEMIE 2020. [DOI: 10.1007/s00706-020-02558-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Abstract
The synthesis and ion binding properties of new amide derived from propeller-like tris(2-pyridyl)amine and 2,6-pyridinedicarboxylic acid chloride were described. Amide binds divalent metal cations: copper(II), nickel(II), zinc(II), and lead(II) in acetonitrile. In acetonitrile:water mixture (9:1 v/v) amide interacts only with copper(II) and nickel(II) cations forming complexes of 1:1 stoichiometry. It was found that the introduction of bulky, nitrogen donor atom bearing pendant groups can influence coordination mode of pyridine-2,6-dicarboxamides. The probable model of ligand-ion interactions is proposed on the basis of 1H NMR and FT-IR spectroscopy.
Graphic abstract
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29
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Qin Y, Long D, Zhu X, Zhou Z, Chai H, Zhao C. Synthesis, Crystal Structure, and DFT Study of a New Compound 6-(2-Fluorophenyl)-N-(p-Tolyl)Imidazo[1,2-A]Pyridine-2-Carboxamide. J STRUCT CHEM+ 2020. [DOI: 10.1134/s0022476619120072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Mishra A, Bhajiwala H, Kothari A, Gupta VK. A New Class of Pyridine-Amide Containing Ti and Zr Based Catalysts for Olefin Polymerization: Influence of Ligand Substituents. Catal Letters 2019. [DOI: 10.1007/s10562-019-02907-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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31
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Pignanelli J, Billet B, Straeten M, Prado M, Schlingman K, Ahamed MJ, Rondeau-Gagné S. Imine and metal-ligand dynamic bonds in soft polymers for autonomous self-healing capacitive-based pressure sensors. SOFT MATTER 2019; 15:7654-7662. [PMID: 31486472 DOI: 10.1039/c9sm01254k] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this work, a facile and simple yet effective method to generate intrinsic autonomous self-healing polymers was developed, leading to new materials that can be easily fine-tuned both mechanically and chemically. The new materials were designed to incorporate two dynamic and reversible types of chemical bonds, namely dynamic imine and metal-coordinating bonds, to enable autonomous self-healing, controlled degradability and ultra-high tunable stretchability (up to 800% strain) based on the ratio of metal to ligand incorporated. Through an easy condensation reaction, imine bonds are generated at the end-termini of a short siloxane chain. The new dynamic system was characterized by a variety of techniques, including tensile-pull strain testing, atomic force microscopy and UV-Vis spectroscopy, which showed that the highly dynamic imine bonds, combined with coordination with Fe2+ ions, allow for the material to regenerate 88% of its mechanical strength after physical damage. The materials were also controlled to be degraded in mild acidic conditions. Lastly, application in self-healable electronics was demonstrated through the fabrication of a capacitive-based pressure sensor, which shows good sensitivity and dynamic response (∼0.33 kPa-1) before and after healing.
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Affiliation(s)
- Julia Pignanelli
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
| | - Blandine Billet
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
| | - Matthew Straeten
- Department of Mechanical, Automotive and Materials Engineering, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
| | - Michaela Prado
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
| | - Kory Schlingman
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
| | - Mohammed Jalal Ahamed
- Department of Mechanical, Automotive and Materials Engineering, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
| | - Simon Rondeau-Gagné
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada.
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Kim I, Kang G, Lee K, Park B, Kang D, Jung H, He YT, Baik MH, Hong S. Site-Selective Functionalization of Pyridinium Derivatives via Visible-Light-Driven Photocatalysis with Quinolinone. J Am Chem Soc 2019; 141:9239-9248. [DOI: 10.1021/jacs.9b02013] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Inwon Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Gyumin Kang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Kangjae Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Bohyun Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Dahye Kang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Hoimin Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Yu-Tao He
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Mu-Hyun Baik
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Sungwoo Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
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33
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Wu WH, Huang MJ, Zeng Q, Xian WR, Liao WM, He J. Electrical and magnetic properties of a radical-based Co(II) coordination complex with C H⋯π and π⋯π supramolecular interactions. INORG CHEM COMMUN 2019. [DOI: 10.1016/j.inoche.2019.03.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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34
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35
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Cavalheiro VMS, Nobre SM, Kessler F. Study of the dual functional behaviour of 1,2-bis(4-bromobenzamide)benzene by synchronous fluorescence spectroscopy. NEW J CHEM 2019. [DOI: 10.1039/c8nj06066e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study presents the dual functionality of 1,2-bis(4-bromobenzamide)benzene, where depending on the stoichiometric conditions, temperature and reaction time, the compound may act as a PdCl2 ligand or as one of the reactants of the Suzuki coupling reaction.
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Affiliation(s)
| | - Sabrina Madruga Nobre
- FURG – Federal University of Rio Grande-Escola de Química e Alimentos
- Rio Grande
- Brazil
| | - Felipe Kessler
- FURG – Federal University of Rio Grande-Escola de Química e Alimentos
- Rio Grande
- Brazil
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36
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Prusty S, Purohit CS. Heterometallic Coordination Polymers with Pyrazine 2,6-Dicarboxamide: Sequential Metallation of Co(III) and Ag(I). ChemistrySelect 2018. [DOI: 10.1002/slct.201801807] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sidheswari Prusty
- School of Chemical Sciences; NISER, Bhubaneswar, P.O. Jatni; Khurda 752050 Odisha India
- Homi Bhabha National Institute (HBNI); Mumbai
| | - Chandra Shekhar Purohit
- School of Chemical Sciences; NISER, Bhubaneswar, P.O. Jatni; Khurda 752050 Odisha India
- Homi Bhabha National Institute (HBNI); Mumbai
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37
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Kumar G, Gupta R. Coordination driven architectures based on metalloligands offering appended carboxylic acid groups. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1491-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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38
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Wang J, Yuan C. 4-(1 H-Indol-3-yl)-2,6-bis(pyrazin-2-yl)pyridine. IUCRDATA 2018. [DOI: 10.1107/s2414314618004923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
In the title compound, C21H14N6, the pyridine ring and two pyrazine rings are nearly coplanar [dihedral angles = 2.03 (7) and 1.60 (7)°], while the dihedral angle between the indole ring system and the pyridine ring is 29.04 (6)°. In the crystal, molecules are linked by N—H...N hydrogen bonds, which generate [-110] chains. The packing is consolidated by C—H...N hydrogen bonds and aromatic π–π stacking, generating a three-dimensional network.
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40
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Sohrabi M, Amirnasr M, Meghdadi S, Lutz M, Bikhof Torbati M, Farrokhpour H. A highly selective fluorescence turn-on chemosensor for Zn2+, and its application in live cell imaging, and as a colorimetric sensor for Co2+: experimental and TD-DFT calculations. NEW J CHEM 2018. [DOI: 10.1039/c8nj01580e] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly sensitive quinoline based “dual” chemosensor used for fluorometric detection of Zn2+, live-cell imaging, and colorimetric detection of Co2+.
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Affiliation(s)
- Marzieh Sohrabi
- Department of Chemistry
- Isfahan University of Technology
- Isfahan 8415683111
- Iran
| | - Mehdi Amirnasr
- Department of Chemistry
- Isfahan University of Technology
- Isfahan 8415683111
- Iran
| | - Soraia Meghdadi
- Department of Chemistry
- Isfahan University of Technology
- Isfahan 8415683111
- Iran
| | - Martin Lutz
- Crystal and Structural Chemistry
- Bijvoet Center for Biomolecular Research
- Faculty of Science
- Utrecht University
- 3584 CH Utrecht
| | - Maryam Bikhof Torbati
- Department of Biology
- College of Science
- Yadegar-e-Imam Khomeini (RAH) Shahr-e-Rey Branch
- Islamic Azad University
- Tehran
| | - Hossein Farrokhpour
- Department of Chemistry
- Isfahan University of Technology
- Isfahan 8415683111
- Iran
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41
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Kumar P, Kumar V, Pandey S, Gupta R. Detection of sulfide ion and gaseous H2S using a series of pyridine-2,6-dicarboxamide based scaffolds. Dalton Trans 2018; 47:9536-9545. [DOI: 10.1039/c8dt01351a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This work presents a series of pyridine-2,6-dicarboxamide based scaffolds with different appendages and their roles as chemosensors for the selective detection of S2− ion, as well as gaseous H2S, in primarily aqueous media.
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Affiliation(s)
- Pramod Kumar
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Vijay Kumar
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Saurabh Pandey
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Rajeev Gupta
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
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42
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Pandey S, Kumar P, Gupta R. Polymerization led selective detection and removal of Zn2+and Cd2+ions: isolation of Zn- and Cd-MOFs and reversibility studies. Dalton Trans 2018; 47:14686-14695. [DOI: 10.1039/c8dt01956h] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two post-functionalized chemosensors display remarkable sensing of Zn2+and Cd2+ionsviagenerating corresponding metal–organic frameworks (MOFs), whereas nitrate and nitrite ions reverse the MOF-polymerization process.
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Affiliation(s)
- Saurabh Pandey
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Pramod Kumar
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Rajeev Gupta
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
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43
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McDonald SM, Mellerup SK, Barran C, Wang X, Wang S. Binding Modes and Reactivity of Pyrido[2,1-a]isoindole as a Neutral Carbon Donor with Main-Group and Transition-Metal Elements. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00696] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sean M. McDonald
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Soren K. Mellerup
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Christopher Barran
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Xiang Wang
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Suning Wang
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
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45
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Sengupta A, Rajput A, Barman SK, Mukherjee R. Low-spin [M II(L) 2] and [M III(L) 2] + (M = Fe and Co) complexes of tridentate azo-containing pyridine/pyrazine amide ligands: structures, properties and redox potential correlations. Dalton Trans 2017; 46:11291-11305. [PMID: 28805866 DOI: 10.1039/c7dt01577a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using deprotonated forms of tridentate azo-containing pyridine-2-/pyrazine-2-carboxamide 2-[N-(2-phenylazo)carbamoyl]-pyridine/pyrazine, seven bis-ligand complexes of FeII/CoII and FeIII/CoIII have been synthesized. Molecular structures of six of them reveal that these six-coordinate complexes utilize all available donor sites of the ligands and assume MII/IIIN2(pyridine/pyrazine)N'2(amide)N''2(azo) coordination. Complexes of FeII and CoIII are diamagnetic and those of FeIII and CoII are paramagnetic (S = 1/2; room-temperature magnetic data and EPR spectra). Cyclic voltammetry experiments in CH2Cl2 reveal facile metal-centred FeIII/FeII and CoIII/CoII redox responses, and all complexes display quasireversible-to-irreversible ligand(azo)-centred redox processes. The E1/2 values of MIII/MII redox processes for Fe, Co and Ni (reported earlier) complexes of the pyridine amide ligand linearly correlate with those for six-coordinate [MIII(bpy)3]3+/[MII(bpy)3]2+, [MIII(terpy)2]3+/[MII(terpy)2]2+, [MIII(L)]+/[MII(L)]0 or [MIII(L')2]+/[MII(L')2]0 (bpy = 2,2'-bipyridine, terpy = 2,2':6',2''-terpyridine, hexadentate L(2-) = 1,4-bis[o-(pyridine-2-carboxamidophenyl)]-1,4-dithiobutane and tridentate L'(-) = {2-[2-(arylimino)phenylazo]-pyridine}) couples. Density functional theory (DFT) at the B3LYP level and time-dependent (TD)-DFT calculations rationalize the electronic structure of the present complexes and throw light on the origin of observed electronic transitions.
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Affiliation(s)
- Arunava Sengupta
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208 016, India.
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46
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Kumar P, Kumar V, Gupta R. Selective fluorescent turn-off sensing of Pd2+ ion: applications as paper strips, polystyrene films, and in cell imaging. RSC Adv 2017. [DOI: 10.1039/c6ra27565f] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Pyridine-2,6-dicarboxamide based scaffolds with appended naphthyl groups act as fluorescent probes for the selective detection of Pd2+ ions in aqueous medium and have applications as paper-strip sensors, as polystyrene films, and in cell imaging.
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Affiliation(s)
- Pramod Kumar
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Vijay Kumar
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
| | - Rajeev Gupta
- Department of Chemistry
- University of Delhi
- Delhi 110007
- India
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47
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Bansal D, Gupta R. Hydroxide-bridged dicopper complexes: the influence of secondary coordination sphere on structure and catecholase activity. Dalton Trans 2017; 46:4617-4627. [DOI: 10.1039/c6dt04858g] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work illustrates the syntheses, structures and catecholase activities of dicopper(ii) complexes having a Cu(μ-OH)Cu core encased within a secondary coordination sphere intricately created by appended heterocyclic rings.
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Affiliation(s)
- Deepak Bansal
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
| | - Rajeev Gupta
- Department of Chemistry
- University of Delhi
- Delhi 110 007
- India
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48
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Drover MW, Love JA, Schafer LL. 1,3-N,O-Complexes of late transition metals. Ligands with flexible bonding modes and reaction profiles. Chem Soc Rev 2017; 46:2913-2940. [DOI: 10.1039/c6cs00715e] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
1,3-N,O-Chelating ligands are ubiquitous in nature owing to their occurrence as α-chiral amino acids in metalloproteins.
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Affiliation(s)
- Marcus W. Drover
- Department of Chemistry
- The University of British Columbia Vancouver
- Canada
| | - Jennifer A. Love
- Department of Chemistry
- The University of British Columbia Vancouver
- Canada
| | - Laurel L. Schafer
- Department of Chemistry
- The University of British Columbia Vancouver
- Canada
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49
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Functionalized mercaptoacetic and propionic acid amides: synthesis, cyclopalladation features, and catalytic activity of metal complexes. Russ Chem Bull 2016. [DOI: 10.1007/s11172-015-1207-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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50
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Corona T, Draksharapu A, Padamati SK, Gamba I, Martin-Diaconescu V, Acuña-Parés F, Browne WR, Company A. Rapid Hydrogen and Oxygen Atom Transfer by a High-Valent Nickel-Oxygen Species. J Am Chem Soc 2016; 138:12987-12996. [PMID: 27598293 DOI: 10.1021/jacs.6b07544] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Terminal high-valent metal-oxygen species are key reaction intermediates in the catalytic cycle of both enzymes (e.g., oxygenases) and synthetic oxidation catalysts. While tremendous efforts have been directed toward the characterization of the biologically relevant terminal manganese-oxygen and iron-oxygen species, the corresponding analogues based on late-transition metals such as cobalt, nickel or copper are relatively scarce. This scarcity is in part related to the "Oxo Wall" concept, which predicts that late transition metals cannot support a terminal oxido ligand in a tetragonal environment. Here, the nickel(II) complex (1) of the tetradentate macrocyclic ligand bearing a 2,6-pyridinedicarboxamidate unit is shown to be an effective catalyst in the chlorination and oxidation of C-H bonds with sodium hypochlorite as terminal oxidant in the presence of acetic acid (AcOH). Insight into the active species responsible for the observed reactivity was gained through the study of the reaction of 1 with ClO- at low temperature by UV-vis absorption, resonance Raman, EPR, ESI-MS, and XAS analyses. DFT calculations aided the assignment of the trapped chromophoric species (3) as a nickel-hypochlorite species. Despite the fact that the formal oxidation state of the nickel in 3 is +4, experimental and computational analysis indicate that 3 is best formulated as a NiIII complex with one unpaired electron delocalized in the ligands surrounding the metal center. Most remarkably, 3 reacts rapidly with a range of substrates including those with strong aliphatic C-H bonds, indicating the direct involvement of 3 in the oxidation/chlorination reactions observed in the 1/ClO-/AcOH catalytic system.
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Affiliation(s)
- Teresa Corona
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Facultat de Ciències, Universitat de Girona, C/ Maria Aurèlia Capmany 69 , E17003 Girona, Catalonia, Spain
| | - Apparao Draksharapu
- Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Sandeep K Padamati
- Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Ilaria Gamba
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Facultat de Ciències, Universitat de Girona, C/ Maria Aurèlia Capmany 69 , E17003 Girona, Catalonia, Spain
| | - Vlad Martin-Diaconescu
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Facultat de Ciències, Universitat de Girona, C/ Maria Aurèlia Capmany 69 , E17003 Girona, Catalonia, Spain
| | - Ferran Acuña-Parés
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Facultat de Ciències, Universitat de Girona, C/ Maria Aurèlia Capmany 69 , E17003 Girona, Catalonia, Spain
| | - Wesley R Browne
- Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Anna Company
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Facultat de Ciències, Universitat de Girona, C/ Maria Aurèlia Capmany 69 , E17003 Girona, Catalonia, Spain
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