1
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Jana NC, Sun YC, Herchel R, Nandy R, Brandão P, Bagh B, Wang XY, Panja A. Chemical fixation of atmospheric CO 2 in tricopper(II)-carbonato complexes with tetradentate N-donor ligands: reactive intermediates, probable mechanisms, and catalytic and magneto-structural studies. Dalton Trans 2024; 53:11514-11530. [PMID: 38916290 DOI: 10.1039/d4dt00503a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
In the present era, the fixation of atmospheric CO2 is of significant importance and plays a crucial role in maintaining the balance of carbon and energy flow within ecosystems. Generally, CO2 fixation is carried out by autotrophic organisms; however, the scientific community has paid substantial attention to execute this process in laboratory. In this report, we synthesized two carbonato-bridged trinuclear copper(II) complexes, [Cu3(L1)3(μ3-CO3)](ClO4)3 (1) and [Cu3(L2)3(μ3-CO3)](ClO4)3 (2) via atmospheric fixation of CO2 starting with Cu(ClO4)2·6H2O and easily accessible pyridine/pyrazine-based N4 donor Schiff base ligands L1 and L2, respectively. Under very similar reaction conditions, the ligand framework embedded with the phenolate moiety (HL3) fails to do so because of the reduction of the Lewis acidity of the metal center, inhibiting the formation of a reactive hydroxide bound copper(II) species, which is required for the fixation of atmospheric CO2. X-ray crystal structures display that carbonate-oxygen atoms bridge three copper(II) centers in μ3syn-anti disposition in 1 and 2, whereas [Cu(HL3)(ClO4)] (3) is a mononuclear complex. Interestingly, we also isolated an important intermediate of atmospheric CO2 fixation and structurally characterized it as an anti-anti μ2 carbonato-bridged dinuclear copper(II) complex, [Cu2(L2)2(μ2-CO3)](ClO4)2·MeOH (2-I), providing an in-depth understanding of CO2 fixation in these systems. Variable temperature magnetic susceptibility measurement suggests ferromagnetic interactions between the metal centers in both 1 and 2, and the results have been further supported by DFT calculations. The catalytic efficiency of our synthesized complexes 1-3 was checked by means of catechol oxidase and phenoxazinone synthase-like activities. While complexes 1 and 2 showed oxidase-like activity for aerobic oxidation of o-aminophenol and 3,5-di-tert-butylcatechol, complex 3 was found to be feebly active. ESI mass spectrometry revealed that the oxidation reaction proceeds through the formation of complex-substrate intermediations and was further substantiated by DFT calculations. Moreover, active catalysts 1 and 2 were effectively utilized for the base-free oxidation of benzylic alcohols in the presence of air as a green and sustainable oxidant and catalytic amount of TEMPO in acetonitrile. Various substituted benzylic alcohols smoothly converted to their corresponding aldehydes under very mild conditions and ambient temperature. The present catalytic protocol showcases its environmental sustainability by producing minimal waste.
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Affiliation(s)
- Narayan Ch Jana
- Department of Chemistry, Panskura Banamali College, Panskura RS, WB 721152, India.
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), P. O. - Bhimpur-Padanpur, Dist. - Khurda, Jatni - 752050, Odisha, India
| | - Yu-Chen Sun
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Radovan Herchel
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 77146 Olomouc, Czech Republic
| | - Rakhi Nandy
- Department of Chemistry, Gokhale Memorial Girls' College, 1/1 Harish Mukherjee Road, Kolkata 700020, India
| | - Paula Brandão
- Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Bidraha Bagh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), P. O. - Bhimpur-Padanpur, Dist. - Khurda, Jatni - 752050, Odisha, India
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry, Collaborative Innovation Center of Advanced Microstructures, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Anangamohan Panja
- Department of Chemistry, Panskura Banamali College, Panskura RS, WB 721152, India.
- Department of Chemistry, Gokhale Memorial Girls' College, 1/1 Harish Mukherjee Road, Kolkata 700020, India
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2
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Bonastre-Sabater I, Lopera A, Martínez-Camarena Á, Blasco S, Doménech-Carbó A, Jiménez HR, Verdejo B, García-España E, Clares MP. Exo- or endo-1 H-pyrazole metal coordination modulated by the polyamine chain length in [1 + 1] condensation azamacrocycles. Binuclear complexes with remarkable SOD activity. Dalton Trans 2024. [PMID: 38973348 DOI: 10.1039/d4dt01236d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/09/2024]
Abstract
The Cu2+ complexes of three [1 + 1] azacyclophane macrocycles having the 1H-pyrazole ring as the spacer and the pentaamine 1,5,8,11,15-pentaazadecane (L1) or hexaamines 1,5,8,12,15,19-hexaazanonadecane (L2) and 1,5,9,13,17,21-hexaazaheneicosane (L3) as bridges show endo- coordination of the pyrazolate bridge giving rise to discrete monomeric species. Previously reported pyrazolacyclophanes evidenced, however, exo-coordination with the formation of dimeric species of 2 : 2, 3 : 2 or even 4 : 2 Cu2+ : L stoichiometry. The complexes have been characterized in solution using potentiometric studies, UV-Vis spectroscopy, paramagnetic NMR, cyclic voltammetry and mass spectrometry. The measurements show that all three ligands have as many protonation steps in water as secondary amines are in the bridge, while they are able to form both mono- and binuclear Cu2+ species. The crystal structures of the complexes [Cu(HL1)Br]Br(1+x)(ClO4)(1-x)·yH2O (1) and [Cu2(H-1L2)Cl(ClO4)](ClO4)·H2O·C2H5OH (2) have been solved by X-ray diffraction studies. In 1 the metal ion lies at one side of the macrocyclic cavity being coordinated by one nitrogen of the pyrazolate moiety and the three consecutive nitrogen atoms of the polyamine bridge. The other nitrogen of the pyrazole ring is hydrogen-bonded to an amine group. In 2 the two metal ions are interconnected by a pyrazolate bis(monodentate) moiety and complete their coordination spheres with three amines and either a bromide or a perchlorate anion, which occupy the axial positions of distorted square pyramid geometries. Paramagnetic NMR studies of the binuclear complexes confirm the coordination pattern observed in the crystal structures. Cyclic voltamperommetry data show potentials within the adequate range to exhibit superoxide dismutase (SOD) activity. The IC50 values calculated by McCord-Fridovich enzymatic assays show that the binuclear Cu2+ complexes of L2 and L3 have SOD activities that rank amongst the highest ones reported so far.
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Affiliation(s)
- Irene Bonastre-Sabater
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - Alberto Lopera
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - Álvaro Martínez-Camarena
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
- Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, avda. Complutense s/n, 28040 Madrid, Spain
| | - Salvador Blasco
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - Antonio Doménech-Carbó
- Departamento de Química Analítica, Universidad de Valencia, Calle Dr Moliner s/n, 46100 Burjassot, Valencia, Spain
| | - Hermas R Jiménez
- Departamento de Química Inorgánica, Universidad de Valencia, Calle Doctor Moliner s/n, 46100 Burjasot, Valencia, Spain
| | - Begoña Verdejo
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - Enrique García-España
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - M Paz Clares
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular. Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
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3
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Martín-Montes Á, Martínez-Camarena Á, Lopera A, Bonastre-Sabater I, Clares MP, Verdejo B, García-España E, Marín C. The Bioactivity of Xylene, Pyridine, and Pyrazole Aza Macrocycles against Three Representative Leishmania Species. Pharmaceutics 2023; 15:pharmaceutics15030992. [PMID: 36986853 PMCID: PMC10059905 DOI: 10.3390/pharmaceutics15030992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 03/22/2023] Open
Abstract
Due to the urgent need for finding effective and free of secondary effect treatments for every clinical form of Leishmaniasis, a series of synthetic xylene, pyridine and, pyrazole azamacrocycles were tested against three Leishmania species. A total of 14 compounds were tested against J774.2 macrophage cells which were models for host cells, and against promastigote and amastigote forms of each studied Leishmania parasite. Amongst these polyamines, one proved effective against L. donovani, another one for L. braziliensis and L. infantum, and another one was selective solely for L. infantum. These compounds showed leishmanicidal activity and reduced parasite infectivity and dividing ability. Action mechanism studies gave a hint that compounds were active against Leishmania due to their ability to alter parasite metabolic pathways and reduce (except Py33333) parasitic Fe-SOD activity.
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Affiliation(s)
- Álvaro Martín-Montes
- Departamento de Parasitología, Instituto de Investigación Biosanitaria (IBS. Granada), Hospitales Universitarios de Granada, Universidad de Granada, Severo Ochoa s/n, 18071 Granada, Spain
| | - Álvaro Martínez-Camarena
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Alberto Lopera
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Irene Bonastre-Sabater
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - M. Paz Clares
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Begoña Verdejo
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain
| | - Enrique García-España
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Spain
- Correspondence: (E.G.-E.); (C.M.)
| | - Clotilde Marín
- Departamento de Parasitología, Instituto de Investigación Biosanitaria (IBS. Granada), Hospitales Universitarios de Granada, Universidad de Granada, Severo Ochoa s/n, 18071 Granada, Spain
- Correspondence: (E.G.-E.); (C.M.)
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Mukherjee D, Reja S, Sarkar K, Fayaz T, Kumar P, Kejriwal A, Das P, Sanphui P, Kumar Das R. In Vitro Cytotoxicity Activity of Copper Complexes of imine and amine ligands: A Combined Experimental and Computational Study. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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5
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Insights on the Synthesis of N-Heterocycles Containing Macrocycles and Their Complexion and Biological Properties. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27072123. [PMID: 35408522 PMCID: PMC9000807 DOI: 10.3390/molecules27072123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 11/25/2022]
Abstract
Macrocyclic chemistry has been extensively developed over the past several decades. In fact, the architecture of new macrocyclic models has undergone exponential growth to offer molecules with specific properties. In this context, an attempt is made in this study to provide an overview of some synthetic methods allowing the elaboration of N-heterocycles containing macrocycles (imidazole, triazole, tetrazole, and pyrazole), as well as their applications in the complexation of metal cations or as pharmacological agents.
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6
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Tian XF, Ji BQ, Feng L, Sheng K, Su YM, Jagodič M, Jagličić Z, Tung CH, Sun D. Self-assembly of a nonanuclear Ni II cluster via atmospheric CO 2 fixation: synthesis, structure, collision-induced dissociation mass spectrometry and magnetic property. Dalton Trans 2020; 49:10977-10982. [PMID: 32725011 DOI: 10.1039/d0dt01573c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel nonanuclear nickel(ii) cluster identified as [Ni9(OH)6(CO3)2(ba)8(Hdmpz)6(DMF)2]·EtOH·2DMF (SD/Ni9a, Hba = benzoic acid, Hdmpz = 3,5-dimethyl-1H-pyrazole) is successfully constructed from mixed ligands. The single-crystal X-ray diffraction (SCXRD) structural analysis confirms the composition and reveals the "drum-like" inner core structure surrounded by ba- and DMF. Six Hdmpz ligands in their neutral form further sandwich the "drum" up and down, and is hydrogen bonded with two carbonate anions that are derived from the atmospheric CO2 with the help of Et3N. Electrospray ionization mass spectrometry (ESI-MS) reveals that the SD/Ni9a maintains an intact core in the solution with a slight exchange of outer ligands. Detailed collision-induced dissociation (CID) experiments reveal the collision energy (CE)-promoted ligand loss and exchange between ba- and Hdmpz. Furthermore, the magnetic study shows that there is no interaction between the Ni centers at room temperature, whereas the ferromagnetic coupling between the Ni centers is found with an S = 3 spin ground state of the cluster at low temperature. Moreover, the UV-vis spectrum and the photocurrent response measurements show its good optical properties with an indirect bandgap of about 2.35 eV and fast current response upon visible light irradiation.
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Affiliation(s)
- Xue-Fei Tian
- School of Chemistry and Chemical Engineering, and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, People's Republic of China.
| | - Bao-Qian Ji
- School of Chemistry and Chemical Engineering, and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, People's Republic of China.
| | - Lei Feng
- School of Chemistry and Chemical Engineering, and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, People's Republic of China.
| | - Kai Sheng
- School of Aeronautics, Shandong Jiaotong University, Jinan, 250037, People's Republic of China.
| | - Yan-Min Su
- School of Chemistry and Chemical Engineering, and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, People's Republic of China.
| | - Marko Jagodič
- Institute of Mathematics, Physics and Mechanics, Jadranska 19, 1000 Ljubljana, Slovenia.
| | - Zvonko Jagličić
- Institute of Mathematics, Physics and Mechanics, Jadranska 19, 1000 Ljubljana, Slovenia.
| | - Chen-Ho Tung
- School of Chemistry and Chemical Engineering, and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, People's Republic of China.
| | - Di Sun
- School of Chemistry and Chemical Engineering, and State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, People's Republic of China.
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7
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Lopera A, Aguilar JA, Belda R, Verdejo B, Steed JW, García-España E. Hybrid GMP-polyamine hydrogels as new biocompatible materials for drug encapsulation. SOFT MATTER 2020; 16:6514-6522. [PMID: 32597453 DOI: 10.1039/d0sm00704h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Here we present the preparation and characterization of new biocompatible materials for drug encapsulation. These new gels are based on positively charged [1+1] 1H-pyrazole-based azamacrocycles which minimise the electrostatic repulsions between the negatively charged GMP molecules. Rheological measurements confirm the electroneutral hydrogel structure as the most stable for all the GMP-polyamine systems. Nuclear magnetic resonance (NMR) was employed to investigate the kinetics of the hydrogel formation and cryo-scanning electron microscopy (cryo-SEM) was used to obtain information about the hydrogel morphology, which exhibited a non-homogeneous structure with a high degree of cross-linking. It is possible to introduce isoniazid, which is the most employed antibiotic for tuberculosis treatment, into the hydrogels without disrupting the hydrogel structure at appropriate concentrations for oral administration.
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Affiliation(s)
- Alberto Lopera
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular, Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - Juan A Aguilar
- Department of Chemistry, Durham University, South Road, DH1 3LE Durham, UK.
| | - Raquel Belda
- Department of Chemistry, Durham University, South Road, DH1 3LE Durham, UK.
| | - Begoña Verdejo
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular, Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - Jonathan W Steed
- Department of Chemistry, Durham University, South Road, DH1 3LE Durham, UK.
| | - Enrique García-España
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular, Universidad de Valencia, Calle Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
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Lopera A, Gil-Martínez A, Pitarch-Jarque J, Verdejo B, Blasco S, Clares MP, Jiménez HR, García-España E. Influence of the chain length and metal : ligand ratio on the self-organization processes of Cu 2+ complexes of [1 + 1] 1H-pyrazole azamacrocycles. Dalton Trans 2020; 49:8614-8624. [PMID: 32543616 DOI: 10.1039/d0dt01056a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Three new [1 + 1] macrocycles formed by the reaction of 1H-3,5-bis(chloromethyl)pyrazole with the tosylated amines 1,4,7,10-tetraazadecane (L1), 1,4,8,11-tetraazaundecane (L2) and 1,5,10,14-tetraazatetradecane (L3) are described. Potentiometric studies and HR-ESI-Mass spectrometry show the formation of dimeric binuclear Cu2+ complexes whose organization depends on the type of hydrocarbon chains connecting the amine groups. Furthermore, trinuclear or/and tetranuclear complexes are formed depending also on the length of the polyaminic bridge and on the sequence of the hydrocarbon chains. The crystal structures of the [2 + 2] [Cu2(H(H-1L2))2](ClO4)4·4H2O (1) and [Cu2(H-1L2)2](ClO4)2 (2) complexes show in both of them two macrocycles self-assembled by the metal ions which interconnect their pyrazolate fragments that behave as bis(monodentate) ligands. While in 1 one central amine of each macrocycle binds to the axial position of a distorted square-pyramid and the other ones remain protonated, in 2 all the amine groups are involved in the coordination giving rise to a strongly distorted octahedral geometry. Paramagnetic 1H NMR measurements support that these structures also form in solution. Interestingly, tetranuclear complexes [Cu4(H-1L4)2(OH)2.08](ClO4)2.92Br0.54Cl0.46 (3) and [Pd2.39Cu1.61(H-1L4)2(OH)2](ClO4)2Cl1.33Br0.67·2.87H2O (4) have been isolated for the macrocycle containing the 1,5,9,13-tetraamine chain (L4). 3 has two binucleating units, one of them formed by the pyrazolate moieties and their neighbouring secondary amines and the other by the two central amines of both macrocycles. This latter Cu2+ coordination site is completed by two hydroxide anions as bridging ligands. 4 was obtained from a solution prepared to achieve full formation of the dimeric cage [Cu2(H-1(HL4))2]4+ by addition of K2PdCl4. The Pd2+ ion due to its softer acidic characteristics displaces the Cu2+ ions from the pyrazolate site. UV-vis spectroscopy suggests that the exchange is completed at room temperature after one hour.
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Affiliation(s)
- Alberto Lopera
- Instituto de Ciencia Molecular, Universidad de Valencia, c/Catedrático José Beltrán Martínez 2, 46980 Paterna, Valencia, Spain.
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9
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Titov AA, Filippov OA, Smol'yakov AF, Baranova KF, Titova EM, Averin AA, Shubina ES. Dinuclear CuI
and AgI
Pyrazolates Supported with Tertiary Phosphines: Synthesis, Structures, and Photophysical Properties. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801318] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Aleksei A. Titov
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov st. 28 119991 Moscow Russia
| | - Oleg A. Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov st. 28 119991 Moscow Russia
| | - Alexander F. Smol'yakov
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov st. 28 119991 Moscow Russia
- Inorganic Chemistry Department; Peoples' Friendship University of Russia; Miklukho-Maklaya str. 6 117198 Moscow Russia
| | - Kristina F. Baranova
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov st. 28 119991 Moscow Russia
- Faculty of Chemistry; Lomonosov Moscow State University; 1-3 Leninskie Gory 119991 Moscow Russia
| | - Ekaterina M. Titova
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov st. 28 119991 Moscow Russia
- Inorganic Chemistry Department; Peoples' Friendship University of Russia; Miklukho-Maklaya str. 6 117198 Moscow Russia
| | - Aleksey A. Averin
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry; Russian Academy of Sciences; Leninsky prospect 31 119071 Moscow Russia
| | - Elena S. Shubina
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilov st. 28 119991 Moscow Russia
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10
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Haldar S, Vijaykumar G, Carrella L, Musie GT, Bera M. Structure and properties of a novel staircase-like decanuclear [CuII10] cluster supported by carbonate and carboxylate bridges. NEW J CHEM 2018. [DOI: 10.1039/c7nj03714g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A novel staircase-like decanuclear copper(ii) cluster composed of a pair of [CuII5] pentameric units that are linked together exclusively by two μ2:η2:η1carbonate ligands is reported. The cluster also shows a rare μ3:η2:η1:η1bridging coordination mode of benzoate groups of the ligand.
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Affiliation(s)
| | - Gonela Vijaykumar
- Department of Chemical Sciences
- Indian Institute of Science Education & Research Kolkata
- Mohanpur
- India
| | - Luca Carrella
- Institut fur Anorganische Chemie und Analytische Chemie
- Johannes-Gutenberg Universität Mainz
- D-55128 Mainz
- Germany
| | - Ghezai T. Musie
- Department of Chemistry
- The University of Texas at San Antonio
- San Antonio
- USA
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11
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Belda R, García-España E, Morris GA, Steed JW, Aguilar JA. Guanosine-5'-Monophosphate Polyamine Hybrid Hydrogels: Enhanced Gel Strength Probed by z-Spectroscopy. Chemistry 2017; 23:7755-7760. [PMID: 28403539 DOI: 10.1002/chem.201700642] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Indexed: 01/25/2023]
Abstract
The self-assembling tendencies of guanosine-5'-monophosphate (GMP) can be drastically increased using polyamines, with potential applications in the production of biocompatible smart materials, as well as for the design of antitumor drugs based on G-quadruplex stabilization. Results from scanning electron microscopy (SEM), wide angle X-ray scattering (WAXS), rheology, and nuclear magnetic resonance (NMR) z-spectroscopy studies are presented.
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Affiliation(s)
- Raquel Belda
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK.,Instituto de Ciencia Molecular, Universidad de Valencia, C/ Catedrático José Beltrán n°. 2, 46980, Paterna, Spain.,School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Enrique García-España
- Instituto de Ciencia Molecular, Universidad de Valencia, C/ Catedrático José Beltrán n°. 2, 46980, Paterna, Spain
| | - Gareth A Morris
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
| | - Jonathan W Steed
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK
| | - Juan A Aguilar
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK.,School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
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12
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Pitarch-Jarque J, Belda R, Lloret F, Ferrando-Soria J, Navarro P, Lopera A, García-España E. "3 + 1 = 6 + 2" in Cu(II) coordination chemistry of 1H-pyrazole aza cryptands. Dalton Trans 2015; 44:3378-83. [PMID: 25601042 DOI: 10.1039/c4dt03650f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A polyazamacrocycle formed from two tris(2-aminoethyl)amine units connected by 1H-pyrazole units shows unique hexanuclear Cu(ii) complexes by combination of two binuclear Cu(ii) cryptand complexes through pyrazolate moieties belonging to both cryptands. The formation of these dimeric entities has been proven both in solution by potentiometric studies and mass spectroscopy and in the solid state by X-ray diffraction of crystals of three different batches of formulae [Cu6(H-3)2(H2O)2](TsO)6·22H2O (), [Cu6(H-3)2(NO3)2](NO3)4·2H2O () and [Cu6(H-3)2Cl2]Cl4·(C4H5N3O2)2·14.35H2O (). The hexanuclear unit in and can be viewed like three magnetically independent binuclear complexes with J = -366(3) cm(-1), g = 2.08(1) for and J = -360(3) cm(-1), g = 2.07(1) for .
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Affiliation(s)
- Javier Pitarch-Jarque
- Instituto de Ciencia Molecular, Universidad de Valencia, C/ Catedrático José Beltrán no. 2, 46098, Paterna, Spain.
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13
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Zhang XM, Li P, Gao W, Liu JP, Gao EQ. A new cube-based dodecanuclear cobalt(ii) cluster with azide and tetrazolate ligands exhibiting ferromagnetic ordering. Dalton Trans 2015; 44:13581-5. [DOI: 10.1039/c5dt02032h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel Co12 cluster was composed of three identical Co4 cubane units bridged by μ6-CO32− and tetrazolate bridges and exhibits long-range ferromagnetic ordering at about 9 K.
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Affiliation(s)
- Xiu-Mei Zhang
- College of Chemistry and Materials Science
- Huaibei Normal University
- Anhui 235000
- China
| | - Peng Li
- College of Chemistry and Materials Science
- Huaibei Normal University
- Anhui 235000
- China
| | - Wei Gao
- College of Chemistry and Materials Science
- Huaibei Normal University
- Anhui 235000
- China
| | - Jie-Ping Liu
- College of Chemistry and Materials Science
- Huaibei Normal University
- Anhui 235000
- China
| | - En-Qing Gao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- East China Normal University
- Shanghai 200062
- China
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14
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Massoud SS, Louka FR, Al-Hasan MA, Vicente R, Mautner FA. Magneto-structural properties of carbonato-bridged copper(ii) complexes: fixation of atmospheric CO2. NEW J CHEM 2015. [DOI: 10.1039/c5nj00285k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Weak ferromagnetic [Cu3(dmMePEA)3(μ3-CO3)(ClO4)3]ClO4 (1) and strong antiferromagnetic [Cu2(iptren)2(μ2-CO3)](ClO4)2·H2O (2) carbonato-bridged Cu(ii) complexes were synthesized via atmospheric fixation of CO2 in slightly basic solutions.
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Affiliation(s)
- Salah S. Massoud
- Department of Chemistry
- University of Louisiana at Lafayette
- LA
- USA
| | - Febee R. Louka
- Department of Chemistry
- University of Louisiana at Lafayette
- LA
- USA
| | | | - Ramon Vicente
- Department de Química Inorgànica
- Universitat de Barcelona
- Martí i Franquès 1-11
- 08028 Barcelona
- Spain
| | - Franz A. Mautner
- Institut für Physikalische and Theoretische Chemie
- Technische Universität Graz
- A-8010 Graz
- Austria
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