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Moshniaha L, Żyła-Karwowska M, Chmielewski PJ, Lis T, Cybińska J, Gońka E, Oschwald J, Drewello T, Rivero SM, Casado J, Stępień M. Aromatic Nanosandwich Obtained by σ-Dimerization of a Nanographenoid π-Radical. J Am Chem Soc 2020; 142:3626-3635. [PMID: 31997634 PMCID: PMC7467677 DOI: 10.1021/jacs.9b13942] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
A 139-π-electron
nanographenoid radical was obtained by expanding
the periphery of a naphthalimide–azacoronene hybrid with a
methine bridge. The radical was isolated in the form of its σ-dimer,
which was shown to possess a conformationally restricted two-layer
structure both in the solid state and in solution. The dimer is cleaved
into its parent radicals when exposed to ultraviolet or visible radiation
in toluene solutions but is resistant to thermally induced dissociation.
Under inert conditions, the radicals recombine quantitatively into
the σ-dimer with observable kinetics, but they are oxidized
into a ketone derivative in the presence of atmospheric oxygen. Combined
structural, spectroscopic, and theoretical evidence shows that the
σ-dimer contains a weak C(sp3)–C(sp3) bond, but is stabilized against thermal dissociation by a very
strong dispersive interaction between the overlapping π surfaces.
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Tziotzi TG, Andreou EK, Tzanetou E, Kalofolias DA, Cutler DJ, Weselski M, Siczek M, Lis T, Brechin EK, Milios CJ. The first amino acid bound manganese–calcium clusters: a {[MnIII3Ca]2} methylalanine complex, and a [MnIII6Ca] trigonal prism. Dalton Trans 2020; 49:10339-10343. [DOI: 10.1039/d0dt01916j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of methylalanine in manganese/calcium chemistry has led to the synthesis and characterization of the first manganese/calcium amino acid containing polynuclear clusters.
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Bryndal I, Drozd M, Lis T, Zaręba JK, Ratajczak H. Structural diversity of hydrogen-bonded complexes comprising phenol-based and pyridine-based components: NLO properties and crystallographic and spectroscopic studies. CrystEngComm 2020. [DOI: 10.1039/d0ce00606h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of compounds with improved physicochemical properties, including nonlinear optical phenomena such as second harmonic generation, might be considered as one of the most challenging aspects of crystal engineering.
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Jęśkowiak I, Ryng S, Świtalska M, Wietrzyk J, Bryndal I, Lis T, Mączyński M. The N'-Substituted Derivatives of 5-Chloro-3-Methylisothiazole-4-Carboxylic Acid Hydrazide with Antiproliferative Activity. Molecules 2019; 25:molecules25010088. [PMID: 31881700 PMCID: PMC6982951 DOI: 10.3390/molecules25010088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 12/20/2019] [Accepted: 12/22/2019] [Indexed: 11/16/2022] Open
Abstract
Thanks to the progress in oncology, pharmacological treatment of cancer is gaining in importance and in the near future anti-cancer chemotherapeutics are expected to be the main method of treatment for cancer diseases. What is more, the search for new anti-cancer compounds with the desired application properties is constantly underway. As a result of designed syntheses, we obtained some new N’-substituted 5-chloro-3-methylisothiazole-4-carboxylic acid hydrazide derivatives with anticancer activity. The structure of new compounds was determined by mass spectrometry (MS), elemental analysis, proton nuclear magnetic resonance spectroscopy (1H-NMR), carbon nuclear magnetic resonance spectroscopy (13C-NMR), 1H-13C NMR correlations and infrared spectroscopy (IR). Moreover, the structures of the compounds were confirmed by crystallographic examination. The antiproliferative MTT tests for 11 prepared compounds was conducted towards human biphenotypic B cell myelomonocytic leukemia MV4-11. SRB test was used to examine their potential anticancer activity towards human colon adenocarcinoma cell lines sensitive LoVo, resistant to doxorubicin LoVo/DX, breast adenocarcinoma MCF-7 and normal non-tumorigenic epithelial cell line derived from mammary gland MCF-10A. The most active compound was 5-chloro-3-methyl-N′-[(1E,2E)-(3-phenyloprop-2-en-1-ylidene]isothiazole-4-carbohydrazide, which showed the highest antiproliferative activity against all tested cell lines.
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Bryndal I, Lorenc J, Macalik L, Michalski J, Sąsiadek W, Lis T, Hanuza J. Crystal structure, vibrational and optic properties of 2-N-methylamino-3-methylpyridine N-oxide - Its X-ray and spectroscopic studies as well as DFT quantum chemical calculations. J Mol Struct 2019; 1195:208-219. [PMID: 32336784 PMCID: PMC7173143 DOI: 10.1016/j.molstruc.2019.05.064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 04/27/2019] [Accepted: 05/17/2019] [Indexed: 01/10/2023]
Abstract
The crystal and molecular structure and physicochemical properties of 2-N-methylamino-3-methylpyridine N-oxide (MA3MPO) have been studied. MA3MPO was synthesized from 2-amino-3-methylpyridine by several steps to form colorless crystals suitable for crystallographic analysis. The data reveal that MA3MPO crystallizes in the monoclinic space group P21/n. The studied compound contains a nearly flat triply substituted pyridine skeleton whose structure is stabilized by an intramolecular N–H⋅⋅⋅O hydrogen bond. The N-oxide molecules are connected together by weak C–H⋯O hydrogen bonds, an acceptor of which is the oxygen atom from the N-oxide group. This leads to creation of two-dimensional network of hydrogen bonds. Its IR, Raman, UV–Vis and luminescence spectra have been measured and analyzed on the basis of DFT and NBO quantum chemical calculations in which the B3LYP/6-311++G(d,p) approach was applied. The distribution of the electron levels in the studied compound has been analyzed in terms of the possibility of its participation in the ligand-to-lanthanide ion energy transfer. The 2-N-methylamino-3-methylpyridine N-oxide (MA3MPO) was synthesized and characterized. The studied compound structure is stabilized by an intramolecular N–H⋯O hydrogen bond. The molecules are connected together by weak C–H⋯O hydrogen bonds. The amino group plays the role of effective hydrogen-bond donor but the N-oxide group is a hydrogen-bond acceptor. X-ray, IR, Raman and DFT methods recognized the existence of the intramolecular N–H⋯O hydrogen bond in the studied compound.
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Kamyabi MA, Soleymani‐Bonoti F, Alirezaei F, Bikas R, Noshiranzadeh N, Emami M, Krawczyk MS, Lis T. Electrocatalytic properties of a dinuclear cobalt(III) coordination compound in molecular oxygen reduction reaction. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5214] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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58
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Kakaroni FE, Tzimopoulos DI, Fraser HWL, Siczek M, Lis T, Evangelisti M, Brechin EK, Milios CJ. A Ferromagnetically Coupled, Bell-Shaped [Ni4Gd5] Cage. Inorg Chem 2019; 58:11404-11409. [DOI: 10.1021/acs.inorgchem.9b00946] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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59
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Aghahosseini H, Ramazani A, Taran J, Ślepokura K, Lis T. Heteroaromatic Aldehydes with Unprecedented Catalytic Performance in Selective Radical Reactions: Synthesis of α‐Aminophosphonate Scaffolds. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900241] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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60
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Kalofolias DA, Weselski M, Siczek M, Lis T, Tsipis AC, Tangoulis V, Milios CJ. Dinuclear and Mononuclear Rhenium Coordination Compounds upon Employment of a Schiff-Base Triol Ligand: Structural, Magnetic, and Computational Studies. Inorg Chem 2019; 58:8596-8606. [PMID: 31180213 DOI: 10.1021/acs.inorgchem.9b00886] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The 1:1 reaction of trans-[ReIIICl3(PPh3)2(MeCN)] with 2-(β-naphthalideneamino)-2-hydroxymethyl-1-propanol, H3L, in toluene gave the dinuclear complex [ReIII2Cl4(HL)(PPh3)]·2C7H8 (1·2C7H8), while the 1:2 reaction led to the formation of complex [ReIVCl2(HL)(PPh3)] (2). In both species, the Schiff-base ligand exists in its doubly deprotonated form, HL2-, forming chelate rings around the metallic centers. In addition, 1·2C7H8 displays a unique triple metal-to-metal bond between the two trivalent rhenium ions separated at a 2.229(1) Å bond distance, while in complex [ReIVCl2(HL)(PPh3)] (2) the two aromatic ligands, HL2- and PPh3, occupy axial positions, with the terminal Cl- ions in the trans position. Investigation of the magnetic properties revealed a Curie paramagnetic behavior ( S = 1/2) with a pronounced temperature independent paramagnetism (TIP) for 1·2C7H8 and 2. Both the geometry and the electronic structure of both compounds have been studied by means of density functional theory (DFT) calculations, confirming the triplet and doublet spin ground state of the complexes and furthermore establishing an electron-rich σ2π4δ1δ*1 bond order of 3 for 1·2C7H8. In addition, the absorption spectrum of 1·2C7H8 in CH2Cl2 was simulated by means of DFT calculations and is in excellent agreement with both the crystallographic and theoretical studies. Complex 1·2C7H8 is the first dinuclear rhenium complex with a triple metal-metal bond between trivalent rhenium centers.
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Ahankar H, Ramazani A, Ślepokura K, Lis T, Kinzhybalo V. Magnetic cobalt ferrite nanoparticles functionalized with citric acid as a green nanocatalyst for one-pot three-component sonochemical synthesis of substituted 3-pyrrolin-2-ones. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-03878-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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62
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Senthilkumar K, Kondratowicz M, Lis T, Chmielewski PJ, Cybińska J, Zafra JL, Casado J, Vives T, Crassous J, Favereau L, Stępień M. Lemniscular [16]Cycloparaphenylene: A Radially Conjugated Figure-Eight Aromatic Molecule. J Am Chem Soc 2019; 141:7421-7427. [PMID: 30998349 DOI: 10.1021/jacs.9b01797] [Citation(s) in RCA: 99] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A cycloparaphenylene-based molecular lemniscate (CPPL) was obtained in a short synthesis involving masked p-phenylene equivalents. The strained figure-eight geometry of CPPL is sustained by the incorporated 9,9'-bicarbazole subunit, which also acts as a stereogenic element. The shape of the distorted [16]cycloparaphenylene nanohoop embedded in CPPL is accurately approximated with a Booth lemniscate. The structure of CPPL, investigated using NMR and Raman spectroscopic methods, revealed strain-dependent features, consistent with the variable curvature of the ring. The electronic and optical properties of CPPL combine features more characteristic of smaller cycloparaphenylenes, such as a reduced optical bandgap and red-shifted fluorescence. CPPL was resolved into enantiomers, which are configurationally stable and provide strong chiroptical responses, including circularly polarized luminescence.
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Navakouski M, Zhylitskaya H, Chmielewski PJ, Lis T, Cybińska J, Stępień M. Back Cover: Stereocontrolled Synthesis of Chiral Heteroaromatic Propellers with Small Optical Bandgaps (Angew. Chem. Int. Ed. 15/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/anie.201902135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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64
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Ramazani A, Ahankar H, Ślepokura K, Lis T, Joo SW. Single Crystal X-Ray Structural Analysis of Two Polymorphs of Ethyl 2-(2-Chlorophenyl)-4-Hydroxy-5-Oxo-1-Phenyl-2,5-Dihydro-1H-Pyrrole-3-Carboxylate. J STRUCT CHEM+ 2019. [DOI: 10.1134/s0022476619040188] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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65
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Navakouski M, Zhylitskaya H, Chmielewski PJ, Lis T, Cybińska J, Stępień M. Stereocontrolled Synthesis of Chiral Heteroaromatic Propellers with Small Optical Bandgaps. Angew Chem Int Ed Engl 2019; 58:4929-4933. [DOI: 10.1002/anie.201900175] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Indexed: 12/21/2022]
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66
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Navakouski M, Zhylitskaya H, Chmielewski PJ, Lis T, Cybińska J, Stępień M. Rücktitelbild: Stereocontrolled Synthesis of Chiral Heteroaromatic Propellers with Small Optical Bandgaps (Angew. Chem. 15/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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67
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Petrus R, Drąg-Jarząbek A, Utko J, Lis T, Sobota P. Transformation of molecular compounds with Ba(Sr)/Al/Si and Ca(Sr, Ba)/Ti(Zr, Hf)/Si heteroelements as new efficient route to metal silicate materials. Dalton Trans 2019; 48:4283-4298. [PMID: 30859174 DOI: 10.1039/c8dt03796e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silicon-based moieties were anchored in heterometallic alkoxide platforms to obtain molecular clusters based on the M-O-M'-O-Si motif for the generation of mixed-metal silicate materials. Single-source molecular precursors with structures [M{(μ-ddbfo)2Al(OSiPh3)2}2], where dbbfoH = 2,3-dihydro-2,2-dimethylbenzofuran-7-ol and M = Ba (1), Sr (2), [Sr4Ti2(μ6-O)(μ3,η2-OCH2CH2OMe)8(η-OCH2CH2OMe)2(OSiPh3)4] (3), [Sr4M'2(μ4-OH)(μ3,η2-OCH2CH2OMe)4(μ,η2-OCH2CH2OMe)6(μ-X)(OSiPh3)4] (4, with M' = Zr and X = Cl; 5 with M' = Hf and X = OH), [Sr3Hf2(μ5-O)(μ3,η2-OCH2CH2OMe)4(OCH2CH2OMe)4(OSiPh3)4] (6), and [Ca2M'2(μ3-OH)2(μ,η2-OCH2CH2OMe)4(η2-HOCH2CH2OMe)2(η-OCH2CH2OMe)2(OSiPh3)4] for M' = Zr (7), Hf (8), were prepared by substitution of methyl groups, using Ph3SiOH or chloride atoms with KOSiPh3, in [M{(μ-ddbfo)2AlMe2}2] (M = Sr, Ba) or [M4M'2(μ6-O)(μ3,η2-OCH2CH2OMe)8(OCH2CH2OMe)2(HOCH2CH2OMe)xCl4] (M = Ca, Sr, Ba, M' = Ti, Zr, Hf and x = 0, 4). The precursors were characterized by elemental analysis, NMR spectroscopy, and single-crystal X-ray structural analysis. Thermal decomposition of compounds 1-8 at 1000 °C led to formation of ceramic materials that consisted of mixed-metal oxide nanocrystallites embedded in an amorphous SiO2 matrix. Compounds 1 and 2 decomposed to BaAl2Si2O8 and SrAl2Si2O8 aluminosilicates, 4 gave a mixture of SrSiO3, ZrO2, SrZrO3 and Sr7ZrSi6O21, 5 and 6 gave mixtures of various compounds, including SrHfO3, Hf0.96Si0.04O2, and SiO2, 7 lead to CaZrO3, ZrO2 and Ca3ZrSi2O9 and 8 gave a HfO2, Ca2HfSi4O12 and SiO2 phase. The thermolysis of compound 3 gave SiO2 particles of average size 40-90 nm, which contained spherical SrTiO3, SrSiO3 and Sr2TiSi2O8 nanocrystallites of diameter 5-16 nm.
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Emami M, Bikas R, Noshiranzadeh N, Sanchiz J, Ślepokura K, Lis T. Synthesis, characterization and magnetic properties of phenoxido bridged dinuclear iron(III) complex with bis(phenolate) ligand. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.12.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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69
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Navakouski M, Zhylitskaya H, Chmielewski PJ, Lis T, Cybińska J, Stępień M. Stereocontrolled Synthesis of Chiral Heteroaromatic Propellers with Small Optical Bandgaps. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900175] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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70
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Majewski MA, Chmielewski PJ, Chien A, Hong Y, Lis T, Witwicki M, Kim D, Zimmerman PM, Stępień M. 5,10-Dimesityldiindeno[1,2- a:2',1'- i]phenanthrene: a stable biradicaloid derived from Chichibabin's hydrocarbon. Chem Sci 2019; 10:3413-3420. [PMID: 30996930 PMCID: PMC6429611 DOI: 10.1039/c9sc00170k] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 02/05/2019] [Indexed: 11/21/2022] Open
Abstract
A diindenophenanthrene biradicaloid, formally derived from Chichibabin's hydrocarbon, is obtained in a short, scalable synthesis.
A diindenophenanthrene biradicaloid, formally derived from Chichibabin's hydrocarbon, is obtained in a short, scalable synthesis. The present system is electron-rich and devoid of conjugated substituents, and still exhibits very good stability under ambient conditions. The introduction of the diindeno[1,2-a:2′,1′-i] phenanthrene ring framework results in a singlet biradicaloid system with an easily accessible triplet state (ΔES–T = –1.30 kcal mol–1) and a small electronic bandgap (1.39 V). The stability limits of the title hydrocarbon were explored systematically in the solid state, to reveal an unusual thermally initiated hydrogen-scrambling oligomerization process.
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Stavgianoudaki N, Siczek M, Lis T, Lorusso G, Evangelisti M, Milios CJ. A decanuclear [DyIII6ZnII4] cluster: a {ZnII4} rectangle surrounding an octahedral {DyIII6} single molecule magnet. Dalton Trans 2019; 48:3566-3570. [DOI: 10.1039/c9dt00440h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The synthesis, structure and magnetic relaxation properties of a decanuclear [DyIII6ZnII4] complex are reported.
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Fedorchuk A, Slyvka Y, Kinzhybalo V, Lis T, Mys'kiv M. An unusual diverse coordination of silver(I) with N-allylthiohydantoin ligand in the presence of benzene- and p-toluenesulfonate anions. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.09.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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73
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Rad-Yousefnia N, Shaabani B, Korabik M, Weselski M, Zahedi M, Englert U, Bikas R, Szeliga D, Otręba M, Lis T. Magnetic dimensionality and the crystal structure of two copper(ii) coordination polymers containing Cu6 and Cu2 building units. Dalton Trans 2019; 48:11421-11432. [DOI: 10.1039/c9dt01728c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The preparation, structural characterization, EPR spectroscopy and magnetic structural correlation of two Cu(ii) coordination polymers are reported.
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74
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Aghahosseini H, Ramazani A, Jalayer NS, Ranjdoost Z, Souldozi A, Ślepokura K, Lis T. Vinylphosphonium Salt-Mediated Reactions: A One-Pot Condensation Approach for the Highly cis-Selective Synthesis of N-Benzoylaziridines and the Green Synthesis of 1,4,2-Dioxazoles as Two Important Classes of Heterocyclic Compounds. Org Lett 2018; 21:22-26. [PMID: 30565459 DOI: 10.1021/acs.orglett.8b03388] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An efficient, one-pot, and convenient approach for the reaction of the same precursors, trialkyl(aryl) phosphines, acetylene diesters, and benzhydroxamic acids has been developed to produce two important classes of heterocyclic compounds: N-benzoylaziridines and 1,4,2-dioxazoles. The strategy utilizes the intermediate solvation as a key step in product selectivity. The usefulness of the developed approach has been confirmed in the unprecedented highly cis-selective formation of the N-benzoylaziridines. In addition, the procedure provides a green alternative method for the synthesis of 1,4,2-dioxazoles employing a β-cyclodextrin nanoreactor in aqueous media.
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Kucharska E, Bryndal I, Lis T, Hermanowicz K, Hanuza J. Crystallographic and spectroscopic studies as well as DFT quantum chemical calculations of hydrazo-bond conformation in 4,4′-dimethyl-3,3′,5,5′-tetranitro-2,2-hydrazobipyridine. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.07.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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76
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Sanna G, Madeddu S, Giliberti G, Piras S, Struga M, Wrzosek M, Kubiak-Tomaszewska G, Koziol AE, Savchenko O, Lis T, Stefanska J, Tomaszewski P, Skrzycki M, Szulczyk D. Synthesis and Biological Evaluation of Novel Indole-Derived Thioureas. Molecules 2018; 23:molecules23102554. [PMID: 30301264 PMCID: PMC6222422 DOI: 10.3390/molecules23102554] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 09/23/2018] [Accepted: 09/26/2018] [Indexed: 11/22/2022] Open
Abstract
A series of 2-(1H-indol-3-yl)ethylthiourea derivatives were prepared by condensation of 2-(1H-indol-3-yl)ethanamine with appropriate aryl/alkylisothiocyanates in anhydrous media. The structures of the newly synthesized compounds were confirmed by spectroscopic analysis and the molecular structures of 8 and 28 were confirmed by X-ray crystallography. All obtained compounds were tested for antimicrobial activity against Gram-positive cocci, Gram-negative rods and for antifungal activity. Microbiological evaluation was carried out over 20 standard strains and 30 hospital strains. Compound 6 showed significant inhibition against Gram-positive cocci and had inhibitory effect on the S. aureus topoisomerase IV decatenation activity and S. aureus DNA gyrase supercoiling activity. Compounds were tested for cytotoxicity and antiviral activity against a large panel of DNA and RNA viruses, including HIV-1 and other several important human pathogens. Interestingly, derivative 8 showed potent activity against HIV-1 wild type and variants bearing clinically relevant mutations. Newly synthesized tryptamine derivatives showed also a wide spectrum activity, proving to be active against positive- and negative-sense RNA viruses.
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Stolarczyk M, Bryndal I, Matera-Witkiewicz A, Lis T, Królewska-Golińska K, Cieślak M, Kaźmierczak-Barańska J, Cieplik J. Synthesis, crystal structure and cytotoxic activity of novel 5-methyl-4-thiopyrimidine derivatives. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2018; 74:1138-1145. [PMID: 30284980 DOI: 10.1107/s2053229618012706] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 09/07/2018] [Indexed: 11/10/2022]
Abstract
This article presents the synthesis of three new 4-thiopyrimidine derivatives obtained from ethyl 4-methyl-2-phenyl-6-sulfanylpyrimidine-5-carboxylate as the starting material, namely, ethyl 4-[(4-chlorobenzyl)sulfanyl]-6-methyl-2-phenylpyrimidine-5-carboxylate, C21H19ClN2O2S, (2), {4-[(4-chlorobenzyl)sulfanyl]-6-methyl-2-phenylpyrimidin-5-yl}methanol, C19H17ClN2OS, (3), and 4-[(4-chlorobenzyl)sulfanyl]-5,6-dimethyl-2-phenylpyrimidine, C19H17ClN2S, (4), which vary in the substituent at the 5-position of the pyrimidine ring. The compounds were characterized by 1H NMR, 13C NMR, IR and mass spectroscopies, and also elemental analysis. The molecular structures were further studied by single-crystal X-ray diffraction. Compound (2) crystallizes in the space group P-1 with one molecule in the asymmetric unit, whereas compounds (3) and (4) crystallize in the space group P21/c with two and one molecule, respectively, in their asymmetric units. The conformation of each molecule is best defined by the dihedral angles formed between the pyrimidine ring and the planes of the two aryl substituents attached at the 2- and 4-positions. The only structural difference between the three compounds is the substituent at the 5-position of the pyrimidine ring, but they present significantly different features in the hydrogen-bond interactions. Compound (2) displays a one-dimensional chain formed by hydrogen bonds and the chains are further extended into a two-dimensional network. Molecules of (3) and (4) generate one-dimensional chains formed through intermolecular interactions. The study examines the cytotoxicity of compounds (3) and (4) against Human umbilical vein endothelial cells (HUVEC) and HeLa, K562 and CFPAC cancer cell lines. The presence of the hydroxymethyl and methyl groups in (3) and (4), respectively, offers an interesting new insight into the structures and behaviour of these derivatives. Compound (4) was found to be nontoxic against CFPAC and HUVEC; however, it shows weak activity against the HeLa and K563 cell lines. The presence of a hydroxy group in (3) significantly increases its cytotoxicity towards both, i.e. the cancer (HeLa, K562 and CFPAC) and normal (HUVEC) cell lines.
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Bikas R, Kuncser V, Sanchiz J, Schinteie G, Siczek M, Hosseini-Monfared H, Lis T. Structure and magnetic behavior of unpredictable EE-azide bridged tetranuclear Mn(II) complex with ONO-donor hydrazone ligand and its transformation to dinuclear Mn(III) complex. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.03.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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79
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Ghorbanloo M, Bikas R, Jafari S, Krawczyk MS, Lis T. Synthesis, structural characterization and catalytic potential of oxidovanadium(IV) and dioxidovanadium(V) complexes with thiazole-derived NNN-donor ligand. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1465941] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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80
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Żyła‐Karwowska M, Moshniaha L, Hong Y, Zhylitskaya H, Cybińska J, Chmielewski PJ, Lis T, Kim D, Stępień M. Electron‐Deficient Bipyrrole Boomerangs: Bright Fluorophores Obtained via Double C−H Bond Activation. Chemistry 2018; 24:7525-7530. [PMID: 29570876 DOI: 10.1002/chem.201801199] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Indexed: 11/09/2022]
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81
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Bikas R, Farzaneh-Bonab H, Noshiranzadeh N, Aygün M, Emami M, Lis T. Coumarin-naphthohydrazone ligand with a rare coordination mode to form Mn(II) and Co(II) 1-D coordination polymers: synthesis, characterization, and crystal structure. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1446083] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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82
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Kakaroni FE, Collet A, Sakellari E, Tzimopoulos DI, Siczek M, Lis T, Murrie M, Milios CJ. Constructing Cr III-centered heterometallic complexes: [NiCr III] and [CoCr III] wheels. Dalton Trans 2018; 47:58-61. [PMID: 29184940 DOI: 10.1039/c7dt04043a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The solvothermal reaction between Cr(acac)3, MCl2·6H2O (M = Ni, Co) and 2-hydroxy-4-methyl-6-phenyl-pyridine-3-amidoxime (H2L), under basic conditions, led to the synthesis of the heterometallic heptanuclear clusters [MCr(HLzw)6(HL)6]·3Cl (M = Ni, 1; Co, 2), with the nickel analogue displaying an S = 9/2 spin ground-state.
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Mousazade Y, Mohammadi MR, Chernev P, Bikas R, Bagheri R, Song Z, Lis T, Dau H, Najafpour MM. Water oxidation by a manganese–potassium cluster: Mn oxide as a kinetically dominant “true” catalyst for water oxidation. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01151f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, a manganese–potassium cluster was investigated for electrochemical water oxidation to find the true, kinetically dominant, catalyst.
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Fotopoulou E, Martínez-Lillo J, Siczek M, Lis T, Tangoulis V, Evangelisti M, Brechin EK, Milios CJ. A [Cr2Ni] coordination polymer: slow relaxation of magnetization in quasi-one-dimensional ferromagnetic chains. Chem Commun (Camb) 2018; 54:6153-6156. [DOI: 10.1039/c8cc02583e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The first example of a NiII–CrIII chain to exhibit slow relaxation of magnetization is reported.
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85
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Canaj AB, Tzimopoulos DI, Kalofolias DA, Siczek M, Lis T, Murrie M, Milios CJ. Heterometallic lanthanide-centred [NiII6LnIII] rings. Dalton Trans 2018; 47:12863-12867. [DOI: 10.1039/c8dt02855a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The syntheses, structures and magnetic properties of three new hetero-heptametallic [Ni6Ln] complexes are reported.
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86
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Aghahosseini H, Ramazani A, Ślepokura K, Lis T. The first protection-free synthesis of magnetic bifunctional l-proline as a highly active and versatile artificial enzyme: Synthesis of imidazole derivatives. J Colloid Interface Sci 2017; 511:222-232. [PMID: 29028573 DOI: 10.1016/j.jcis.2017.10.020] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Revised: 10/04/2017] [Accepted: 10/05/2017] [Indexed: 11/18/2022]
Abstract
l-Proline is a bifunctional versatile organocatalyst that could promote a variety of useful transformations. Some passive and dynamic interactions between this simple amino acid and different substrates, which are necessary to enzymatic reactions, have given it "the simplest enzyme" title. Herein we presented the first report on the synthesis of magnetic bifunctional l-proline as an artificial enzyme without requiring any protection/deprotection steps according to an operationally simple process. This magnetic nano-biocatalyst is a promising catalyst that in a case study was successfully applied for the synthesis of 2,4,5-trisubstituted and 1,2,4,5-tetrasubstituted imidazoles in the 70-99% and 60-90% yields respectively, which it could be extended to the variety of l-proline-based organic transformations. The synergic effect of bifunctional l-proline shell as catalytic active site and magnetite nanoparticles core, which could function as protein mimics endow it high efficiency, versatility, recoverability, reusability and good turnover frequency, which are necessary characters for artificial enzymes' designing.
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Petrus R, Drąg-Jarząbek A, Utko J, Bykowski D, Lis T, Sobota P. Molecular Routes to Group IV Magnesium and Calcium Nanocrystalline Ceramics. Inorg Chem 2017; 56:11365-11374. [DOI: 10.1021/acs.inorgchem.7b01772] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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88
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Drzewiecka-Antonik A, Koziol AE, Rejmak P, Lawniczak-Jablonska K, Nittler L, Lis T. Novel Ba(II) and Pb(II) coordination polymers based on citric acid: Synthesis, crystal structure and DFT studies. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.04.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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89
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Canaj AB, Siczek M, Lis T, Murrie M, Brechin EK, Milios CJ. A [Ce 21] keplerate. Dalton Trans 2017; 46:7677-7680. [PMID: 28590003 DOI: 10.1039/c7dt01883e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The solvothermal reaction between Ce(NO3)3·6H2O, 2-amino-isobutyric acid, 2-hydroxy-1-naphthaldehyde and 2-amino-2-methyl-1,3-propanediol in MeOH, in the presence of base, leads to the formation of a unique [CeCe ] keplerate cage.
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Bielenica A, Stepien K, Sawczenko A, Lis T, Koziol AE, Madeddu S, Collu D, Iuliano F, Kosmider A, Struga M. Synthesis, Structural Studies and Biological Evaluation of Halogen Derivatives of 1,3-Disubstituted Thiourea. LETT DRUG DES DISCOV 2017. [DOI: 10.2174/1570180814666170106121025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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91
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Aghahosseini H, Ramazani A, Ślepokura K, Lis T, Joo SW. Synthesis and X-ray single crystal structure analysis of a new 2-chlorobenzyl ammonium salt of phosphonic acid. PHOSPHORUS SULFUR 2017. [DOI: 10.1080/10426507.2017.1284837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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92
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Szulczyk D, Tomaszewski P, Jóźwiak M, Kozioł AE, Lis T, Collu D, Iuliano F, Struga M. Synthesis and Biological Activities of Ethyl 2-(2-pyridylacetate) Derivatives Containing Thiourea, 1,2,4-triazole, Thiadiazole and Oxadiazole Moieties. Molecules 2017; 22:molecules22030409. [PMID: 28272311 PMCID: PMC6155191 DOI: 10.3390/molecules22030409] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 02/16/2017] [Accepted: 03/01/2017] [Indexed: 11/24/2022] Open
Abstract
Thirty six novel heterocyclic derivatives of ethyl 2-(2-pyridylacetate) were efficiently synthesized. The new compounds involve the linkage of a 2-pyridyl ring with thiosemicarbazide (compounds 1–7), 1,2,4-triazole (compounds 1a–7a), 1,3,4-thiadiazole (compounds 1b–7b), and 1,3,4-oxadiazole (compounds 1f–7f) moieties. The last group of compounds 1e–7e involves the connection of a 2-pyridyl ring with 1,2,4-triazole and thiourea. 1H-NMR, 13C-NMR and MS methods were used to confirm the structures of the obtained derivatives. The molecular structures of 3, 3b, 7a and 7f were further confirmed by X-ray crystallography. All obtained compounds were tested in vitro against a number of microorganisms, including Gram-positive cocci, Gram-negative rods and Candida albicans. In addition, the obtained compounds were tested for cytotoxicity and antiviral activity against HIV-1.
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Petrus R, Utko J, Lis T, Sobota P. Impact of Group 13 Metals on Cp2TiCl2 Reduction and Structural Characterization of Resulting Compounds. Inorg Chem 2017; 56:3324-3334. [DOI: 10.1021/acs.inorgchem.6b02824] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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94
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Fedorchuk AA, Kinzhybalo VV, Slyvka YI, Goreshnik EA, Bednarchuk TJ, Lis T, Mys’kiv MG. Unexpected complexation of allylpseudothiohydantoin hydrochlorides towards CuX (X = Cl, NO3, ClO4, BF4, 1/2SiF6). The first known examples of joint CuI(Cl,ClO4) and CuI(Cl,BF4) π-complexes. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1286012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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95
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Bikas R, Lippolis V, Noshiranzadeh N, Farzaneh-Bonab H, Blake AJ, Siczek M, Hosseini-Monfared H, Lis T. Electronic Effects of Aromatic Rings on the Catalytic Activity of Dioxidomolybdenum(VI)-Hydrazone Complexes. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201601359] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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96
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Krawczyk MK, Bikas R, Krawczyk MS, Lis T. On rhenium(i)–silver(i) cyanide porous macrocyclic clusters. CrystEngComm 2017. [DOI: 10.1039/c7ce00646b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The first cyanide rhenium(i)–silver(i) clusters were synthesized in the course of simple one-pot high-yielding reactions.
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Ghorbanloo M, Jafari S, Bikas R, Krawczyk MS, Lis T. Dioxidovanadium(V) complexes containing thiazol-hydrazone NNN-donor ligands and their catalytic activity in the oxidation of olefins. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2016.10.005] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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98
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Sobocińska M, Antkowiak M, Wojciechowski M, Kamieniarz G, Utko J, Lis T. Correction: New tetranuclear manganese clusters with [Mn II3Mn III] and [Mn II2Mn III2] metallic cores exhibiting low and high spin ground state. Dalton Trans 2017; 46:4118. [DOI: 10.1039/c7dt90033c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correction for ‘New tetranuclear manganese clusters with [MnII3MnIII] and [MnII2MnIII2] metallic cores exhibiting low and high spin ground state’ by M. Sobocińska et al., Dalton Trans., 2016, 45, 7303–7311.
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Ardan B, Kinzhybalo V, Slyvka Y, Shyyka O, Luk`yanov M, Lis T, Mys`kiv M. Ligand-forced dimerization of copper(I)–olefin complexes bearing a 1,3,4-thiadiazole core. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2017; 73:36-46. [DOI: 10.1107/s2053229616018751] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 11/23/2016] [Indexed: 11/11/2022]
Abstract
As an important class of heterocyclic compounds, 1,3,4-thiadiazoles have a broad range of potential applications in medicine, agriculture and materials chemistry, and were found to be excellent precursors for the crystal engineering of organometallic materials. The coordinating behaviour of allyl derivatives of 1,3,4-thiadiazoles with respect to transition metal ions has been little studied. Five new crystalline copper(I) π-complexes have been obtained by means of an alternating current electrochemical technique and have been characterized by single-crystal X-ray diffraction and IR spectroscopy. The compounds are bis[μ-5-methyl-N-(prop-2-en-1-yl)-1,3,4-thiadiazol-2-amine]bis[nitratocopper(I)], [Cu2(NO3)2(C6H9N3S)2], (1), bis[μ-5-methyl-N-(prop-2-en-1-yl)-1,3,4-thiadiazol-2-amine]bis[(tetrafluoroborato)copper(I)], [Cu2(BF4)2(C6H9N3S)2], (2), μ-aqua-bis{μ-5-[(prop-2-en-1-yl)sulfanyl]-1,3,4-thiadiazol-2-amine}bis[nitratocopper(I)], [Cu2(NO3)2(C5H7N3S2)2(H2O)], (3), μ-aqua-(hexafluorosilicato)bis{μ-5-[(prop-2-en-1-yl)sulfanyl]-1,3,4-thiadiazol-2-amine}dicopper(I)–acetonitrile–water (2/1/4), [Cu2(SiF6)(C5H7N3S2)2(H2O)]·0.5CH3CN·2H2O, (4), and μ-benzenesulfonato-bis{μ-5-[(prop-2-en-1-yl)sulfanyl]-1,3,4-thiadiazol-2-amine}dicopper(I) benzenesulfonate–methanol–water (1/1/1), [Cu2(C6H5O3S)(C5H7N3S2)2](C6H5O3S)·CH3OH·H2O, (5). The structure of the ligand 5-methyl-N-(prop-2-en-1-yl)-1,3,4-thiadiazol-2-amine (Mepeta), C6H9N3S, was also structurally characterized. BothMepetaand 5-[(prop-2-en-1-yl)sulfanyl]-1,3,4-thiadiazol-2-amine (Pesta) (denotedL) reveal a strong tendency to form dimeric {Cu2L2}2+fragments, being attached to the metal atom in a chelating–bridging modeviatwo thiadiazole N atoms and an allylic C=C bond. Flexibility of the {Cu2(Pesta)2}2+unit allows the CuIatom site to be split into two positions with different metal-coordination environments, thus enabling the competitive participation of different molecules in bonding to the metal centre. ThePestaligand in (4) allows the CuIatom to vary between water O-atom and hexafluorosilicate F-atom coordination, resulting in the rare case of a direct CuI...FSiF52−interaction. Extensive three-dimensional hydrogen-bonding patterns are formed in the reported crystal structures. Complex (5) should be considered as the first known example of a CuI(C6H5SO3) coordination compound. To determine the hydrogen-bond interactions in the structures of (1) and (2), a Hirshfeld surface analysis has been performed.
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Canaj AB, Kalofolias DA, Siczek M, Lis T, McNab R, Lorusso G, Inglis R, Evangelisti M, Milios CJ. Tetradecanuclearity in 3d–4f chemistry: relaxation and magnetocaloric effects in [NiII6LnIII8] species. Dalton Trans 2017; 46:3449-3452. [DOI: 10.1039/c7dt00102a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The syntheses, structures, relaxation and magnetocaloric properties of two new hetero-tetradecametallic 3d–4f complexes are reported.
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