1
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Jankowska D, Lakomska I, Muziol TM, Skowronski L, Rerek T, Popielarski P, Barwiolek M. The optical properties of 3 + 3 macrocyclic Schiff base thin material obtained by the Molecular Beam Epitaxy method. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 326:125229. [PMID: 39366314 DOI: 10.1016/j.saa.2024.125229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2024] [Revised: 09/12/2024] [Accepted: 09/27/2024] [Indexed: 10/06/2024]
Abstract
3 + 3 optically active macrocyclic Schiff bases were synthesized in the reaction between 4-tert-butyl-2,6-diformylphenol with (1R,2R)-(+)-1,2-diphenylethylenediamine (S1) or (1S,2S)-(-)-1,2-diphenylethylenediamine (S1a). The new compounds were spectroscopically characterised by NMR, IR, X-ray (S1a), UV-Vis and fluorescence spectroscopy. The S1a molecule creates channels with distances between oxygen atoms ranging from 5.8-6.3 Å and sufficiently large to host acetonitrile molecule. Both compounds exhibit green-yellow emission in solution and solid state. Thin layers of the S1 compound obtained via Molecular Beam Epitaxy (MBE) were characterised by scanning electron microscopy with energy-dispersive X-ray spectroscopy SEM/EDS and atomic force microscopy (AFM). The optical properties of the S1/Si thin material were analysed using spectroscopic ellipsometry (SE), fluorescence spectroscopy and synchrotron radiation (SR). The time constant for the decay investigated under SR, denoted by τ1, was determined to be approximately 1.02 ns, suggesting a fast deactivation process of the excited electronic state in the S1/Si material. The ellipsometric analysis of the S1/Si layer showed semiconducting behaviour with pronounced absorption features in the UV range, attributed to π → π* and n → π* transitions, characteristic of Schiff bases. The band-gap energy, determined using the Tauc method, is 3.46 ± 0.01 eV. These analyses highlight the material's potential in applications requiring precise control of optical properties. In the emission spectrum of S1a, a significant emission peak of approximately 561 nm indicates the presence of a prominent emissive process within this wavelength. The S1a compound is emissive in the yellow-green region of the spectrum and has a longer decay time, which suggests that it can be used in sensing optical technologies.
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Affiliation(s)
- Dominika Jankowska
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland.
| | - Iwona Lakomska
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland.
| | - Tadeusz M Muziol
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland.
| | - Lukasz Skowronski
- Division of Surface Science, Faculty of Chemical Technology and Engineering, Bydgoszcz University of Science and Technology, Kaliskiego 7, 85-796 Bydgoszcz, Poland.
| | - Tomasz Rerek
- Division of Surface Science, Faculty of Chemical Technology and Engineering, Bydgoszcz University of Science and Technology, Kaliskiego 7, 85-796 Bydgoszcz, Poland.
| | - Pawel Popielarski
- Institute of Physics, Kazimierz Wielki University, Chodkiewicza 30, 85-064 Bydgoszcz, Poland.
| | - Magdalena Barwiolek
- Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, 87-100 Torun, Poland.
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2
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Zhang Y, Torres-Cavanillas R, Yan X, Zeng Y, Jiang M, Clemente-León M, Coronado E, Shi S. Spin crossover iron complexes with spin transition near room temperature based on nitrogen ligands containing aromatic rings: from molecular design to functional devices. Chem Soc Rev 2024; 53:8764-8789. [PMID: 39072682 DOI: 10.1039/d3cs00688c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2024]
Abstract
During last decades, significant advances have been made in iron-based spin crossover (SCO) complexes, with a particular emphasis on achieving reversible and reproducible thermal hysteresis at room temperature (RT). This pursuit represents a pivotal goal within the field of molecular magnetism, aiming to create molecular devices capable of operating in ambient conditions. Here, we summarize the recent progress of iron complexes with spin transition near RT based on nitrogen ligands containing aromatic rings from molecular design to functional devices. Specifically, we discuss the various factors, including supramolecular interactions, crystal packing, guest molecules and pressure effects, that could influence its cooperativity and the spin transition temperature. Furthermore, the most recent advances in their implementation as mechanical actuators, switching/memories, sensors, and other devices, have been introduced as well. Finally, we give a perspective on current challenges and future directions in SCO community.
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Affiliation(s)
- Yongjie Zhang
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
| | - Ramón Torres-Cavanillas
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - Xinxin Yan
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
| | - Yixun Zeng
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
| | - Mengyun Jiang
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
| | - Miguel Clemente-León
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - Eugenio Coronado
- Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, Catedrático José Beltrán 2, 46980 Paterna, Spain.
| | - Shengwei Shi
- Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
- Key Laboratory of Optoelectronic Chemical Materials and Devices (Ministry of Education), Jianghan University, Wuhan, 430056, China
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3
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Zahradníková E, Sutter JP, Halaš P, Drahoš B. Trigonal prismatic coordination geometry imparted by a macrocyclic ligand: an approach to large axial magnetic anisotropy for Co(II). Dalton Trans 2023. [PMID: 38015562 DOI: 10.1039/d3dt02639f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Large uniaxial magnetic anisotropy, expressed by a negative value of the axial zero-field splitting parameter D, has been achieved in a series of trigonal prismatic Co(II) complexes with the general formula [Co(L)X]Y, where L = 1,5,13,17,22-pentaazatricyclo[15.2.2.17,11]docosa-7,9,11(22)-triene, X = Cl-(1a,b), Br-(2), N3-(3), NCO-(4), NCS-(5), NCSe-(6), and Y = Cl-(1), Br-(2), NCS-(4), NCSe-(5), ClO4-(3,6). Complexes 1-6 are six-coordinate with the distorted trigonal prismatic geometry imparted by the pentadentate pyridine-/piperazine-based macrocyclic ligand L and by one monovalent coligand X-. Based on magnetic studies, all complexes 1-6 exhibit strong magnetic anisotropy with negative D-values ranging from about -20 to -41 cm-1. This variation in D (i.e. the increase of magnetic anisotropy) parallels the trend obtained by theoretical calculations and the lesser distortion of the coordination sphere with respect to the trigonal prismatic reference geometry. AC magnetic susceptibility investigations revealed field-induced single-molecule magnet behaviour for all complexes except Cl- derivative 1. The series investigated represents a rare example of Co(II) complexes with a robust trigonal prismatic geometry.
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Affiliation(s)
- Eva Zahradníková
- Department of Inorganic Chemistry, Faculty of Science, Palacký University Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Jean-Pascal Sutter
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France.
| | - Petr Halaš
- Department of Inorganic Chemistry, Faculty of Science, Palacký University Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic.
| | - Bohuslav Drahoš
- Department of Inorganic Chemistry, Faculty of Science, Palacký University Olomouc, 17. listopadu 12, 771 46 Olomouc, Czech Republic.
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4
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Fesenko AA, Shutalev AD. Unprecedented synthesis of a 14-membered hexaazamacrocycle. Beilstein J Org Chem 2023; 19:1728-1740. [PMID: 38025087 PMCID: PMC10667714 DOI: 10.3762/bjoc.19.126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 11/02/2023] [Indexed: 12/01/2023] Open
Abstract
The transformation of 3-[(ethoxymethylene)amino]-1-methyl-1H-pyrazole-4-carbonitrile into the 14-membered macrocycle, 2,10-dimethyl-2,8,10,16-tetrahydrodipyrazolo[3,4-e:3',4'-l][1,2,4,8,9,11]hexaazacyclotetradecine-4,12-diamine, by the reaction with excess hydrazine under various conditions was studied in detail. The reaction proceeded through the initial formation of 4-imino-2-methyl-2,4-dihydro-5H-pyrazolo[3,4-d]pyrimidin-5-amine followed by dimerization to give the final macrocycle. A convenient synthesis of the latter starting from 4-imino-2-methyl-2,4-dihydro-5H-pyrazolo[3,4-d]pyrimidin-5-amine was developed. A plausible pathway for the macrocycle self-assembly is discussed. Some features of the structure and reactivity of the obtained macrocycle are outlined.
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Affiliation(s)
- Anastasia A Fesenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Ave., 119991 Moscow, Russian Federation
| | - Anatoly D Shutalev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Ave., 119991 Moscow, Russian Federation
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5
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Rigamonti L. Oligonuclear Metal Complexes with Schiff Base Ligands. Int J Mol Sci 2023; 24:11014. [PMID: 37446197 DOI: 10.3390/ijms241311014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
As stated by two of the seven papers [...].
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Affiliation(s)
- Luca Rigamonti
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Modena e Reggio Emilia, Via G. Campi 103, 41125 Modena, Italy
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Mironov VS, Bazhenova TA, Manakin YV, Yagubskii EB. Pentagonal-bipyramidal 4d and 5d complexes with unquenched orbital angular momentum as a unique platform for advanced single-molecule magnets: current state and perspectives. Dalton Trans 2023; 52:509-539. [PMID: 36537237 DOI: 10.1039/d2dt02954e] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This article overviews the current state and prospects of the concept of advanced single-molecule magnets (SMMs) based on low-spin (S = 1/2) pentagonal-bipyramidal (PBP) 4d3 and 5d3 complexes with unquenched orbital angular momentum. This approach is based on the unique property of PBP 4d3 and 5d3 complexes to cause highly anisotropic spin coupling of perfect uniaxial symmetry, -JzSziSzj - Jxy(SxiSxj + SyiSyj), regardless of the local geometric symmetry. The M(4d/5d)-M(3d) exchange-coupled pairs in the apical positions of the PBP complexes produce Ising-type exchange interactions (|Jz| > |Jxy|), which serve as a powerful source of uniaxial magnetic anisotropy of a SMM cluster. In polynuclear heterometallic 4d/5d-3d complexes embodying PBP 4d/5d units and high-spin 3d ions, anisotropic Ising-type exchange interactions produce a double-well potential with high energy barriers Ueff, which is controlled by the anisotropic exchange parameters Jz, Jxy. Theoretical analysis shows that the barrier is proportional to the difference |Jz - Jxy| and to the number n of the apical 4d/5d-3d pairs in a SMM cluster, Ueff ∝ |Jz - Jxy|n, which provides an opportunity to scale up the barrier Ueff and blocking temperature TB up to the record values. A novel family of 4d/5d complexes with forced PBP coordination provided by structurally rigid planar pentadentate Schiff-base ligands in the equatorial plane is discussed as a better alternative to the cyanometallates. The possibility of a significant increase in the anisotropic exchange parameters Jz, Jxy in PBP complexes with monoatomic apical μ-bridging ligands is examined. The basic principles of molecular engineering the highest barrier through anisotropic exchange interactions of PBP 4d/5d complexes are formulated. The theoretical and experimental results taken together indicate that the concept of high-performance SMMs based on 4d/5d PBP complexes with unquenched orbital angular momentum is an attractive alternative to the currently dominant lanthanide-based SMM strategy.
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Affiliation(s)
- V S Mironov
- Institute of Problems of Chemical Physics RAS, Federal Research Center of Problems of Chemical Physics and Medical Chemistry RAS, Chernogolovka 142432, Russia. .,Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" RAS, Moscow, Russia
| | - T A Bazhenova
- Institute of Problems of Chemical Physics RAS, Federal Research Center of Problems of Chemical Physics and Medical Chemistry RAS, Chernogolovka 142432, Russia.
| | - Yu V Manakin
- Institute of Problems of Chemical Physics RAS, Federal Research Center of Problems of Chemical Physics and Medical Chemistry RAS, Chernogolovka 142432, Russia.
| | - E B Yagubskii
- Institute of Problems of Chemical Physics RAS, Federal Research Center of Problems of Chemical Physics and Medical Chemistry RAS, Chernogolovka 142432, Russia.
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7
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Yan S, Feng G, Geng J, Feng F, Ma H, Huang W. Tunable Construction of Sandwich-Type Double-[1 + 1] and Half-Folded [2 + 2] Schiff-Base Complexes Controlled by the Combination of Primary and Secondary Template Effects. Inorg Chem 2022; 61:20994-21003. [PMID: 36495277 DOI: 10.1021/acs.inorgchem.2c03473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The first-row transition-metal ions Mn2+-Cu2+ could serve as effective templates to construct three types of double-[1 + 1], [2 + 2], and [1 + 1] Schiff-base dinuclear macrocyclic complexes in the presence of dialdehydes with different pendant arms and a common 1,8-diamine. The extremely flexible nature of macrocyclic ligands allows for the multiple template-directed syntheses, but the final products could be finely tuned by the subtle variations of Mn2+-Cu2+ ions in a 3d-electronic configuration, radius, and coordination number/geometry as well as the auxiliary (pendant-armed and anionic) template effect at the same time. Two borderlines are observed at the Co2+ ion for forming double-[1 + 1] and [2 + 2] metallacycles involving the H2pdd precursor and the [1 + 1] Cu2+ complex for double-[1 + 1] and [2 + 2] macrocycles containing the H2hpdd unit, respectively. The structural diversity is originated from the non-perfect match between [1 + 1]/[2 + 2] Schiff-base macrocycles and dinuclear metal centers; hence, a compromise between the metal coordination modes and alterations of the ligand conformation takes place.
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Affiliation(s)
- Suqiong Yan
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu Province, P. R. China
| | - Genfeng Feng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu Province, P. R. China
| | - Jiao Geng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu Province, P. R. China
| | - Fanda Feng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu Province, P. R. China
| | - Hui Ma
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu Province, P. R. China
| | - Wei Huang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, Jiangsu Province, P. R. China.,Shenzhen Research Institute of Nanjing University, Shenzhen 518057, P. R. China
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8
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Fesenko A, Grigoriev MS, Arion VB, Shutalev AD. Different Modes of Acid-Promoted Cyclooligomerization of 4-(4-Thiosemicarbazido)butan-2-one Hydrazone: 14-Membered versus 28-Membered Polyazamacrocycle Formation. J Org Chem 2022; 87:15722-15731. [PMID: 36383744 PMCID: PMC9724087 DOI: 10.1021/acs.joc.2c01199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Unprecedented self-assembly of a novel 14-membered cyclic bis-thiosemicarbazone or/and a 28-membered cyclic tetrakis-thiosemicarbazone upon acid-promoted cyclooligomerization of 4-(4-thiosemicarbazido)butan-2-one hydrazone has been discovered. A thorough study of the influence of various factors on the direction of macrocyclization provided the optimal conditions for the highly selective formation of each of the macrocycles in excellent yields. Plausible pathways for macrocyclizations have been discussed. The macrocycle precursor was prepared by the reaction of readily available 4-isothiocyanatobutan-2-one with an excess of hydrazine.
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Affiliation(s)
- Anastasia
A. Fesenko
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Avenue, 119991 Moscow, Russian Federation
| | - Mikhail S. Grigoriev
- Frumkin
Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31 Leninsky Avenue, Bldg 4, 119071 Moscow, Russian Federation
| | - Vladimir B. Arion
- Institute
of Inorganic Chemistry of the University of Vienna, Währinger Strasse 42, 1090 Vienna, Austria
| | - Anatoly D. Shutalev
- N.
D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Avenue, 119991 Moscow, Russian Federation,;
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9
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Pharmaceutical Properties of Macrocyclic Schiff Base Transition Metal Complexes: Urgent Need in Today’s World. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Gil Y, Castro-Alvarez A, Fuentealba P, Spodine E, Aravena D. Lanthanide SMMs Based on Belt Macrocycles: Recent Advances and General Trends. Chemistry 2022; 28:e202200336. [PMID: 35648577 DOI: 10.1002/chem.202200336] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Indexed: 11/06/2022]
Abstract
Enhancement of axial magnetic anisotropy is the central objective to push forward the performance of Single-Molecule Magnet (SMM) complexes. In the case of mononuclear lanthanide complexes, the chemical environment around the paramagnetic ion must be tuned to place strongly interacting ligands along either the axial positions or the equatorial plane, depending on the oblate or prolate preference of the selected lanthanide. One classical strategy to achieve a precise chemical environment for a metal centre is using highly structured, chelating ligands. A natural approach for axial-equatorial control is the employment of macrocycles acting in a belt conformation, providing the equatorial coordination environment, and leaving room for axial ligands. In this review, we present a survey of SMMs based on the macrocycle belt motif. Literature systems are divided in three families (crown ether, Schiff-base and metallacrown) and their general properties in terms of structural stability and SMM performance are briefly discussed.
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Affiliation(s)
- Yolimar Gil
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago, Chile.,Centro para la Nanociencia y Nanotecnología (CEDENNA), Santiago, Estación Central, Región Metropolitana, Chile
| | - Alejandro Castro-Alvarez
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Santiago, Chile
| | - Pablo Fuentealba
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago, Chile
| | - Evgenia Spodine
- Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago, Chile.,Centro para la Nanociencia y Nanotecnología (CEDENNA), Santiago, Estación Central, Región Metropolitana, Chile
| | - Daniel Aravena
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Correo 33, Santiago, Chile
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11
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Gregoliński J, Ślepokura K, Kłak J, Witwicki M. Multinuclear Ni(II) and Cu(II) complexes of a meso 6 + 6 macrocyclic amine derived from trans-1,2-diaminocyclopentane and 2,6-diformylpyridine. Dalton Trans 2022; 51:9735-9747. [PMID: 35703400 DOI: 10.1039/d2dt01329k] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four hexanuclear chloride and sulphate Ni(II) and Cu(II) complexes 1, 2, 4 and 5 and one tetranuclear nitrate Cu(II) complex 3 have been synthesised from appropriate metal salts and 6 + 6 octadecaaza macrocyclic ligands. All obtained coordination compounds have been characterised by elemental analysis, spectroscopic methods (ESI MS, NMR and EPR), magnetic susceptibility measurements and X-ray crystallography. Their X-ray crystal structures reveal different coordination modes of metal cations involved in the obtained centro-symmetrical coordination compounds. The conformational folding of the macrocyclic ligand adopted in the respective complexes depends on the number of metal cations bound within the macrocycle but not on their type. The cavities of these multinuclear complexes might be occupied by solvent molecules and counter anions bound by hydrogen bonds or might be empty in the case where the macrocyclic ring of the ligand is squeezed in the middle. All obtained Ni(II) and Cu(II) coordination compounds are paramagnetic. This has been proved by their 1H NMR and EPR spectra and magnetic measurements. Direct current (DC) variable-temperature magnetic susceptibility measurements on the polycrystalline samples of 1-5 were carried out in the temperature range of 1.8-300 K. The magnetic behaviour of 1 and 2 is dominated by the magnetic anisotropy of the nickel(II) ion masking the magnetic interactions between magnetic centres. The magnetic data of 3-5 reveal small antiferromagnetic interactions within the Cu4 and Cu6 units. EPR experiments for 3-5 show, at 9.6 and 34 GHz frequencies, that the predominant contribution to the orbitals occupied by the unpaired electrons in the ground state originates from dx2-y2.
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Affiliation(s)
- Janusz Gregoliński
- Faculty of Chemistry University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland.
| | - Katarzyna Ślepokura
- Faculty of Chemistry University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland.
| | - Julia Kłak
- Faculty of Chemistry University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland.
| | - Maciej Witwicki
- Faculty of Chemistry University of Wrocław, ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland.
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12
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Fesenko AA, Shutalev AD. A general and stereoselective approach to 14-membered cyclic bis-semicarbazones involving BF 3-catalyzed amidoalkylation of 2-(trimethylsilyloxy)propene. Org Biomol Chem 2022; 20:4569-4588. [PMID: 35593300 DOI: 10.1039/d2ob00644h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A general and stereoselective five-step approach to 14-membered cyclic bis-semicarbazones, 5,12-diaryl-7,14-dimethyl-1,2,4,8,9,11-hexaazacyclotetradeca-7,14-diene-3,10-diones, starting from aldehyde semicarbazones has been developed. The key intermediates, 4-(3-oxobut-1-yl)semicarbazones, were prepared by BF3-catalyzed amidoalkylation of 2-(trimethylsilyloxy)propene with 4-[(aryl)(methoxy)methyl]- or 4-[(aryl)(tosyl)methyl]semicarbazones. Treatment of these intermediates with excess of hydrazine gave hydrazones of 4-(3-oxobut-1-yl)semicarbazones or 4-(3-oxobut-1-yl)semicarbazides, which in the presence of TsOH were converted into the target macrocycles. All steps of this approach could be scaled up easily to the multi-gram level.
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Affiliation(s)
- Anastasia A Fesenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Ave., 119991 Moscow, Russian Federation.
| | - Anatoly D Shutalev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky Ave., 119991 Moscow, Russian Federation.
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13
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Ct-DNA binding and antimicrobial studies of MnII and FeII macrocyclic complexes. J INCL PHENOM MACRO 2022. [DOI: 10.1007/s10847-022-01150-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Sutter JP, Béreau V, Jubault V, Bretosh K, Pichon C, Duhayon C. Magnetic anisotropy of transition metal and lanthanide ions in pentagonal bipyramidal geometry. Chem Soc Rev 2022; 51:3280-3313. [PMID: 35353106 DOI: 10.1039/d2cs00028h] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The magnetic anisotropy associated with a pentagonal bipyramidal (PBP) coordination sphere is examined on the basis of experimental and theoretical investigations. The origin and the characteristics of this anisotropy are discussed in relation to the electronic configuration of the metal ions. The effects of crystal field, structural distortion, and a second-coordination sphere on the observed anisotropies for transition meal and lanthanide ions are outlined. For the Ln derivatives, we focus on compounds showing SMM-like behavior (i.e. slow relaxation of their magnetization) in order to highlight the essential chemical and structural parameters for achieving strong axial anisotropy. The use of PBP complexes to impart controlled magnetic anisotropy in polynuclear species such as SMMs or SCMs is also addressed. This review of the magnetic anisotropies associated with a pentagonal bipyramidal coordination sphere for transition metal and lanthanide ions is intended to highlight some general trends that can guide chemists towards designing a compound with specific properties.
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Affiliation(s)
- Jean-Pascal Sutter
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France.
| | - Virginie Béreau
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France. .,Université de Toulouse, Institut Universitaire de Technologie Paul Sabatier-Département de Chimie, Av. Georges Pompidou, F-81104 Castres, France
| | - Valentin Jubault
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France.
| | - Kateryna Bretosh
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France.
| | - Céline Pichon
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France.
| | - Carine Duhayon
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS), Université de Toulouse, CNRS, Toulouse, France.
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15
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Jiang TL, Li WZ, Gao QF, Tan DF, Pang JY, Zhang SH. Syntheses, crystal structures and Hirshfeld surface analysis of (Z)-3-[(3-acetyl-2-hydroxyphenyl)amino]-2-bromoprop-2-enal and a novel ZnII complex. Acta Crystallogr C 2022; 78:123-130. [DOI: 10.1107/s2053229622000924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 01/26/2022] [Indexed: 11/10/2022] Open
Abstract
A novel zero-dimensional dinuclear zinc complex, di-μ-acetato-1:2κ4
O:O′-(μ-2-acetyl-6-{[(Z)-2-bromo-3-oxoprop-1-en-1-yl]azanidyl}phenolato-1κ2
O
1,O
2:2κ3
O
1,N,O
6)(N,N-dimethylacetamide-1κO)dizinc(II), [Zn2(C11H8BrNO3)(CH3COO)2(C4H9NO)] or [Zn2(L)(CH3COO)2(DMA)], 1, was synthesized using (Z)-3-[(3-acetyl-2-hydroxyphenyl)amino]-2-bromoprop-2-enal (H2
L), which was synthesized from 1-(3-amino-2-hydroxyphenyl)ethanone and 2-bromomalonaldehyde. H2
L and 1 were characterized by single-crystal X-ray diffraction, FT–IR spectroscopy and elemental analysis. Theoretical calculations of the bond orders and excited state of H2
L confirmed that there is extensive electron delocalization in the H2
L molecules. Single-crystal X-ray diffraction shows that the two Zn atoms are pentacoordinated in distorted trigonal bipyramidal configurations in the crystals of 1. The thermogravimetric analysis of 1 shows that the main frame of the complex remains stable to about 190 °C. Powder X-ray diffraction (PXRD) analysis shows that 1 possesses high purity and acid and alkali resistance. The intermolecular interactions of H2
L and 1 were analyzed using Hirshfeld surface analysis and the results indicate that the H...H and O...H interactions of H2
L and 1 play a considerable role in stabilizing the self-assembly process.
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16
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Zahradníková E, Císařová I, Drahoš B. Syntheses and crystal structures of Ni(II) complexes with pyridine-based macrocyclic ligands. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Pichon C, Duhayon C, Delahaye E, Sutter J. Discrete
versus
1D Compounds based on Pentagonal Bipyramid Coordination Geometries: A Matter of Solubility? Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100834] [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]
Affiliation(s)
- Céline Pichon
- Laboratoire de Chimie de Coordination du CNRS (LCC–CNRS) Université de Toulouse, CNRS, UPS 31077 Toulouse France
| | - Carine Duhayon
- Laboratoire de Chimie de Coordination du CNRS (LCC–CNRS) Université de Toulouse, CNRS, UPS 31077 Toulouse France
| | - Emilie Delahaye
- Laboratoire de Chimie de Coordination du CNRS (LCC–CNRS) Université de Toulouse, CNRS, UPS 31077 Toulouse France
| | - Jean‐Pascal Sutter
- Laboratoire de Chimie de Coordination du CNRS (LCC–CNRS) Université de Toulouse, CNRS, UPS 31077 Toulouse France
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18
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Zahradníková E, Císařová I, Drahoš B. Triple M as Manganese: Medicine, magnetism and macrocycles. Seven-coordinate Mn(II) complexes with pyridine-based macrocyclic ligands. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115231] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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19
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When the Metal Makes the Difference: Template Syntheses of Tridentate and Tetradentate Salen-Type Schiff Base Ligands and Related Complexes. CRYSTALS 2021. [DOI: 10.3390/cryst11050483] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The reaction of organic molecules mediated by a metal center (template synthesis) can result in a final connectivity that may differ from the one obtained in the absence of the metal. The condensation of carbonyl fragments with primary amines form C=N iminic bonds, the so-called Schiff bases, which can act as ligands for the templating metal center by means of the lone pair on the nitrogen atom. This review focuses on the template methods for the reaction between a carbonyl compound (mainly salicylaldehyde) and a primary aliphatic diamine able to prevent the double condensation on both amine groups and obtain tridentate N2O ligands. These adducts, still having one free amino group, can further react, yielding tetradentate salen-type Schiff base ligands. A screening over the transition metals able to show such a template effect will be presented, with particular attention to copper(II), together with their peculiar reactivity and the available crystal structure of the metal complexes and related coordination geometries.
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20
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Choudhury A, Pichon C, Sutter JP, Pamu D, Sarma B, Mudoi PP, Gogoi N. Accessing water processable cyanido bridged chiral heterobimetallic Co(ii)-Fe(iii) one dimensional network. Chem Commun (Camb) 2021; 57:207-210. [PMID: 33300509 DOI: 10.1039/d0cc05356b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A water processable cyanido bridged extended chiral heterobimetallic Co(ii)-Fe(iii) network is assembled. The unusual water processability of the coordination polymer originates from dangling hydrophilic substituents. The present approach offers a simple route to impart solution processability to cyanido bridged molecular magnetic materials.
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Affiliation(s)
- Anup Choudhury
- Department of Chemical Sciences, Tezpur University, Napaam-784028, Sonitpur, Assam, India.
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21
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Huang Y, Shen YJ, Chen TT, Li B, Zhang K. Specific detection and determination of cysteine by a luminescent samarium macrocycle-based fluorescent probe platform. NEW J CHEM 2021. [DOI: 10.1039/d0nj05392a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A samarium macrocycle-based chemosensor bearing two imine bonds and a Sm(iii) emitter provides an indirect approach to detect and determine cysteine.
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Affiliation(s)
- Yan Huang
- Department of Chemistry
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province
- Zhejiang Sci-Tech University
- Hangzhou 310018
- P. R. China
| | - Yin-Jing Shen
- Department of Chemistry
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province
- Zhejiang Sci-Tech University
- Hangzhou 310018
- P. R. China
| | - Ting-Ting Chen
- Department of Chemistry
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province
- Zhejiang Sci-Tech University
- Hangzhou 310018
- P. R. China
| | - Benxia Li
- Department of Chemistry
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province
- Zhejiang Sci-Tech University
- Hangzhou 310018
- P. R. China
| | - Kun Zhang
- Department of Chemistry
- Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province
- Zhejiang Sci-Tech University
- Hangzhou 310018
- P. R. China
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22
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Mondal A, Kharwar AK, Sahu PK, Konar S. Alignment of Axial Anisotropy in a 1D Coordination Polymer shows Improved Field Induced Single Molecule Magnet Behavior over a Mononuclear Seven Coordinated Fe II Complex. Chem Asian J 2020; 15:2681-2688. [PMID: 32603028 DOI: 10.1002/asia.202000666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 06/26/2020] [Indexed: 11/11/2022]
Abstract
Herein, we report a CN-bridged alternating FeII -NiII 1D chain to ensure the alignment of axial anisotropy and improve the single molecule magnet (SMM) behavior in seven coordinated FeII compound. The chain was constructed from hepta coordinated Fe(II) complex as an anisotropic building unit and diamagnetic nickel tetra cyanate as a bridging ligand. The magnetic measurements show the easy-axis anisotropy of the seven coordinated Fe(II) complex and field induced SMM behavior with spin reversal energy barrier Ueff =61(2) K (42 cm-1 ) and pre-exponential relaxation time τ0 =1.9×10-8 s. The detailed analysis of the relaxation dynamics discloses that the Orbach process plays an important role in slow relaxation of magnetization for this compound. Notably, this example represents a remarkable energy barrier observed in hepta coordinated Fe(II) SMMs. The ab initio calculations estimate the magnitude of axial anisotropy and show the parallel orientation of the anisotropic axis throughout the 1D polymeric chain. In addition, it is also reported that the presence of weak π accepter ligands in the distorted axial position enhance the easy-axis anisotropy.
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Affiliation(s)
- Arpan Mondal
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass road, Bhauri, Bhopal, 462066, MP, India
| | - Ajit Kumar Kharwar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass road, Bhauri, Bhopal, 462066, MP, India
| | - Pradip Kumar Sahu
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass road, Bhauri, Bhopal, 462066, MP, India
| | - Sanjit Konar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass road, Bhauri, Bhopal, 462066, MP, India
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23
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Wang C, Fei J, Wang K, Li J. A Dipeptide‐Based Hierarchical Nanoarchitecture with Enhanced Catalytic Activity. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006994] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Chenlei Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS) CAS Key Laboratory of Colloid, Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Jinbo Fei
- Beijing National Laboratory for Molecular Sciences (BNLMS) CAS Key Laboratory of Colloid, Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Keqing Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS) CAS Key Laboratory of Colloid, Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Junbai Li
- Beijing National Laboratory for Molecular Sciences (BNLMS) CAS Key Laboratory of Colloid, Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
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24
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Wang C, Fei J, Wang K, Li J. A Dipeptide‐Based Hierarchical Nanoarchitecture with Enhanced Catalytic Activity. Angew Chem Int Ed Engl 2020; 59:18960-18963. [DOI: 10.1002/anie.202006994] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/14/2020] [Indexed: 12/23/2022]
Affiliation(s)
- Chenlei Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS) CAS Key Laboratory of Colloid, Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Jinbo Fei
- Beijing National Laboratory for Molecular Sciences (BNLMS) CAS Key Laboratory of Colloid, Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Keqing Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS) CAS Key Laboratory of Colloid, Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Junbai Li
- Beijing National Laboratory for Molecular Sciences (BNLMS) CAS Key Laboratory of Colloid, Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
- University of Chinese Academy of Sciences Beijing 100049 China
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25
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Golbedaghi R, Tabanez AM, Esmaeili S, Fausto R. Biological Applications of Macrocyclic Schiff Base Ligands and Their Metal Complexes: A Survey of the Literature (2005–2019). Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5884] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Reza Golbedaghi
- Chemistry Department Payame Noor University Tehran 19395‐4697 Iran
- University of Coimbra CQC, Department of Chemistry Coimbra P‐3004‐535 Portugal
| | - Andreia M. Tabanez
- University of Coimbra CQC, Department of Chemistry Coimbra P‐3004‐535 Portugal
| | - Somayeh Esmaeili
- Internal Medicine Department Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Rui Fausto
- University of Coimbra CQC, Department of Chemistry Coimbra P‐3004‐535 Portugal
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26
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Zahradníková E, Herchel R, Šalitroš I, Císařová I, Drahoš B. Late first-row transition metal complexes of a 17-membered piperazine-based macrocyclic ligand: structures and magnetism. Dalton Trans 2020; 49:9057-9069. [PMID: 32568334 DOI: 10.1039/d0dt01392g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A 17-membered piperazine-based macrocyclic ligand LdiProp (1,5,13,17,22-pentaazatricyclo[15.2.2.17,11]docosa-7,9,11(22)-triene) was resynthesized in high yield by using a linear pump. Its Mn(ii), Fe(ii), Co(ii) and Ni(ii) complexes of the general formula [MnLdiProp(ClO4)2] (1), [FeLdiProp(CH3CN)](ClO4)2 (2), [CoLdiProp(CH3CN)](ClO4)2 (3), [NiLdiProp](ClO4)2 (4) were prepared and thoroughly characterized. X-ray diffraction analysis confirmed that Mn(ii) complex 1 has capped trigonal prismatic geometry with a coordination number of seven, Fe(ii) and Co(ii) complexes 2 and 3 are trigonal prismatic with a coordination number of six and Ni(ii) complex 4 has square pyramidal geometry with a coordination number of five. The decrease of the coordination number is accompanied by a shortening of M-N distances and an increase of torsion of the piperazine ring from the equatorial plane. Magnetic measurement reveals moderate anisotropy for 4 and rather large magnetic anisotropy for 2 and 3 (axial zero-field splitting parameter D(Ni) = 9.0 cm-1, D(Fe) = -14.4 cm-1, D(Co) = -25.8 cm-1, together with rather high rhombicity). Co(ii) complex 3 behaves as a field-induced SMM with a combination of Raman and direct or Orbach and direct relaxation mechanisms. Obtained magnetic data were extensively supported by theoretical CASSCF calculations. The flexibility and rather large 17-membered macrocyclic cavity of ligand LdiProp could be responsible for the variation of coordination numbers and geometries for the investigated late-first row transition metals.
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Affiliation(s)
- Eva Zahradníková
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic.
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27
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Miroslaw B. Homo- and Hetero-Oligonuclear Complexes of Platinum Group Metals (PGM) Coordinated by Imine Schiff Base Ligands. Int J Mol Sci 2020; 21:E3493. [PMID: 32429112 PMCID: PMC7278988 DOI: 10.3390/ijms21103493] [Citation(s) in RCA: 17] [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: 04/30/2020] [Revised: 05/12/2020] [Accepted: 05/13/2020] [Indexed: 11/16/2022] Open
Abstract
Chemistry of Schiff base (SB) ligands began in 1864 due to the discovery made by Hugo Schiff (Schiff, H., Justus Liebigs Ann. der Chemie 1864, 131 (1), 118-119). However, there is still a vivid interest in coordination compounds based on imine ligands. The aim of this paper is to review the most recent concepts on construction of homo- and hetero-oligonuclear Schiff base coordination compounds narrowed down to the less frequently considered complexes of platinum group metals (PGM). The combination of SB and PGM in oligonuclear entities has several advantages over mononuclear or polynuclear species. Such complexes usually exhibit better electroluminescent, magnetic and/or catalytic properties than mononuclear ones due to intermetallic interactions and frequently have better solubility than polymers. Various construction strategies of oligodentate imine ligands for coordination of PGM are surveyed including simple imine ligands, non-innocent 1,2-diimines, chelating imine systems with additional N/O/S atoms, classic N2O2-compartmental Schiff bases and their modifications resulting in acyclic fused ligands, macrocycles such as calixsalens, metallohelical structures, nano-sized molecular wheels and hybrid materials incorporating mesoionic species. Co-crystallization and formation of metallophilic interactions to extend the mononuclear entities up to oligonuclear coordination species are also discussed.
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Affiliation(s)
- Barbara Miroslaw
- Department of General and Coordination Chemistry and Crystallography, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University in Lublin, Pl. Marii Curie-Sklodowskiej 3, 20-031 Lublin, Poland
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28
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Drahoš B, Císařová I, Laguta O, Santana VT, Neugebauer P, Herchel R. Structural, magnetic, redox and theoretical characterization of seven-coordinate first-row transition metal complexes with a macrocyclic ligand containing two benzimidazolyl N-pendant arms. Dalton Trans 2020; 49:4425-4440. [PMID: 32176762 DOI: 10.1039/d0dt00166j] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A structurally new heptadentate derivative of a 15-membered pyridine-based macrocycle containing two benzimidazol-2-yl-methyl N-pendant arms (L = 3,12-bis((1H-benzimidazol-2-yl)methyl)-6,9-dioxa-3,12,18-triazabicyclo[12.3.1]octadeca-1(18),14,16-triene) was synthesized and its complexes with the general formula [M(L)](ClO4)2·1.5CH3NO2 (M = MnII (1), FeII (2), CoII (3) and NiII (4)) were thoroughly investigated. X-ray crystal structures confirmed that all complexes are seven-coordinate with axially compressed pentagonal bipyramidal geometry having the largest distortion for NiII complex 4. FeII, CoII and NiII complexes 2, 3 and 4 show rather large magnetic anisotropy manifested by moderate to high obtained values of the axial zero-field splitting parameter D (7.9, 40.3, and -17.2 cm-1, respectively). Magneto-structural correlation of the FeII, CoII and NiII complexes with L and with previously studied structurally similar ligands revealed a significant impact of the functional group in pendant arms on the magnetic anisotropy especially that of the CoII and NiII complexes and some recommendations concerning the ligand-field design important for anisotropy tuning in future. Furthermore, complex 3 showed field-induced single-molecule magnet behavior described with the Raman (C = 507 K-n s-1 for n = 2.58) relaxation process. The magnetic properties of the studied complexes were supported by theoretical calculations, which very well correspond with the experimental data of magnetic anisotropy. Electrochemical measurements revealed high positive redox potentials for M3+/2+ couples and high negative redox potentials for M2+/+ couples, which indicate the stabilization of the oxidation state +ii expected for the σ-donor/π-acceptor ability of benzimidazole functional groups.
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Affiliation(s)
- Bohuslav Drahoš
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46, Olomouc, Czech Republic.
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 2030, 128 00, Prague, Czech Republic
| | - Oleksii Laguta
- Central European Institute of Technology, CEITEC BUT, Purkyňova 656/123, 61200, Brno, Czech Republic
| | - Vinicius T Santana
- Central European Institute of Technology, CEITEC BUT, Purkyňova 656/123, 61200, Brno, Czech Republic
| | - Petr Neugebauer
- Central European Institute of Technology, CEITEC BUT, Purkyňova 656/123, 61200, Brno, Czech Republic
| | - Radovan Herchel
- Department of Inorganic Chemistry, Faculty of Science, Palacký University, 17. listopadu 12, 771 46, Olomouc, Czech Republic.
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29
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Urbani M, Torres T. A Constrained and "Inverted" [3+3] Salphen Macrocycle with an ortho-Phenylethynyl Substitution Pattern. Chemistry 2020; 26:1683-1690. [PMID: 31821617 DOI: 10.1002/chem.201904763] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 12/01/2019] [Indexed: 01/02/2023]
Abstract
A [3+3] Schiff-base salphen macrocycle (7 a) was synthesized by imine condensation between ortho-phenylenediamine and ortho-phenylethynyl-bridged bis(5-salicylaldehyde) precursors. The triangular-shaped macrocycle 7 a has a nonclassical (or "inverted") design in which the N2 O2 coordination pockets are located at the sides instead of the corners. Compound 7 a could be synthesized in a reasonably good yield (64 %) considering the steric constraints imposed by the ortho substitution pattern. Subsequent zinc metalation afforded the corresponding Zn metallomacrocycle 7 b. Spectroscopic experiments evidenced weak (7 a) to strong (7 b) self-aggregation behavior in solution. Their ability to self-organize at the supramolecular level was further studied in the solid state by AFM and TEM, which revealed the formation of large bundles of fibers with lengths of several micrometers and widths of nanometers.
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Affiliation(s)
- Maxence Urbani
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain.,IMDEA-Nanociencia, Campus de Cantoblanco, 28049, Madrid, Spain
| | - Tomas Torres
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049, Madrid, Spain.,IMDEA-Nanociencia, Campus de Cantoblanco, 28049, Madrid, Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
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30
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Bretosh K, Béreau V, Duhayon C, Pichon C, Sutter JP. A ferromagnetic Ni( ii)–Cr( iii) single-chain magnet based on pentagonal bipyramidal building units. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01489f] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of a ferromagnetic Ni(ii)–Cr(iii) single-chain magnet fashioned using pentagonal bipyramidal Ni(ii) complexes with Ising-type anisotropy.
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Affiliation(s)
- Kateryna Bretosh
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS)
- Université de Toulouse
- CNRS
- Toulouse
- France
| | - Virginie Béreau
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS)
- Université de Toulouse
- CNRS
- Toulouse
- France
| | - Carine Duhayon
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS)
- Université de Toulouse
- CNRS
- Toulouse
- France
| | - Céline Pichon
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS)
- Université de Toulouse
- CNRS
- Toulouse
- France
| | - Jean-Pascal Sutter
- Laboratoire de Chimie de Coordination du CNRS (LCC-CNRS)
- Université de Toulouse
- CNRS
- Toulouse
- France
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31
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Roy S, Halder S, Dey A, Harms K, Ray PP, Chattopadhyay S. Representation of a photosensitive Schottky barrier diode made with hetero-dinuclear cobalt(iii)/sodium building blocks. NEW J CHEM 2020. [DOI: 10.1039/c9nj04542b] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A hetero-dinuclear cobalt(iii)/sodium complex has been synthesized and characterized. The complex which has been used to construct photosensitive Schottky devices, shows interesting C–H⋯π(N3) interactions in the solid state.
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Affiliation(s)
- Sourav Roy
- Department of Chemistry
- Inorganic Section
- Jadavpur University
- Kolkata-700032
- India
| | - Soumi Halder
- Department of Physics
- Jadavpur University
- Kolkata-700032
- India
| | - Arka Dey
- Department of Physics
- Jadavpur University
- Kolkata-700032
- India
- Department of Condensed Matter Physics and Material Sciences
| | - Klaus Harms
- Fachbereich Chemie
- Philipps-Universität Marburg
- D-35032 Marburg
- Germany
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32
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Celedón S, Roisnel T, Artigas V, Fuentealba M, Carrillo D, Ledoux-Rak I, Hamon JR, Manzur C. Palladium( ii) complexes of tetradentate donor–acceptor Schiff base ligands: synthesis and spectral, structural, thermal and NLO properties. NEW J CHEM 2020. [DOI: 10.1039/d0nj01982h] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Structural and NLO behavior of push–pull palladium(ii) complexes of metallocenyl-containing asymmetric Schiff base ligands.
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Affiliation(s)
- Salvador Celedón
- Laboratorio de Química Inorgánica
- Instituto de Química
- Facultad de Ciencias
- Pontificia Universidad Católica de Valparaíso
- Avenida Universidad 330
| | - Thierry Roisnel
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226
- F-35000 Rennes
- France
| | - Vania Artigas
- Laboratorio de Cristalografía
- Instituto de Química
- Facultad de Ciencias
- Pontificia Universidad Católica de Valparaíso
- Curauma
| | - Mauricio Fuentealba
- Laboratorio de Cristalografía
- Instituto de Química
- Facultad de Ciencias
- Pontificia Universidad Católica de Valparaíso
- Curauma
| | - David Carrillo
- Laboratorio de Química Inorgánica
- Instituto de Química
- Facultad de Ciencias
- Pontificia Universidad Católica de Valparaíso
- Avenida Universidad 330
| | - Isabelle Ledoux-Rak
- Laboratoire Lumière
- Matière et Interfaces
- FRE 2036 CNRS 8537
- ENS Paris Saclay
- Institut d’Alembert
| | - Jean-René Hamon
- Univ Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226
- F-35000 Rennes
- France
| | - Carolina Manzur
- Laboratorio de Química Inorgánica
- Instituto de Química
- Facultad de Ciencias
- Pontificia Universidad Católica de Valparaíso
- Avenida Universidad 330
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33
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Yu Q, Zhang X, Wu ST, Chen H, Zhang QL, Xu H, Huang YL, Zhu BX, Ni XL. Twisted Schiff-base macrocycle showing excited-state intramolecular proton-transfer (ESIPT): assembly and sensing properties. Chem Commun (Camb) 2020; 56:2304-2307. [DOI: 10.1039/c9cc09540c] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A Schiff-base macrocyclic host showing ESIPT-based AIEE and nanoparticle assembly.
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Affiliation(s)
- Qing Yu
- School of Basic Medical Science/School of Public Health
- Guizhou Medical University
- Guiyang 550025
- China
| | - Xiaodong Zhang
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang
- China
| | - Shou-Ting Wu
- School of Basic Medical Science/School of Public Health
- Guizhou Medical University
- Guiyang 550025
- China
| | - Huaiyu Chen
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang
- China
| | - Qi-Long Zhang
- School of Basic Medical Science/School of Public Health
- Guizhou Medical University
- Guiyang 550025
- China
| | - Hong Xu
- School of Basic Medical Science/School of Public Health
- Guizhou Medical University
- Guiyang 550025
- China
| | - Ya-Li Huang
- School of Basic Medical Science/School of Public Health
- Guizhou Medical University
- Guiyang 550025
- China
| | - Bi-Xue Zhu
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang
- China
| | - Xin-Long Ni
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province
- Guizhou University
- Guiyang
- China
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34
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A Series of Field-Induced Single-Ion Magnets Based on the Seven-Coordinate Co(II) Complexes with the Pentadentate (N3O2) H2dapsc Ligand. MAGNETOCHEMISTRY 2019. [DOI: 10.3390/magnetochemistry5040058] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A series of five new mononuclear pentagonal bipyramidal Co(II) complexes with the equatorial 2,6-diacetylpyridine bis(semicarbazone) ligand (H2dapsc) and various axial pseudohalide ligands (SCN, SeCN, N(CN)2, C(CN)3, and N3) was prepared and structurally characterizated: [Co(H2dapsc)(SCN)2]∙0.5C2H5OH (1), [Co(H2dapsc)(SeCN)2]∙0.5C2H5OH (2), [Co(H2dapsc)(N(CN)2)2]∙2H2O (3), [Co(H2dapsc)(C(CN)3)(H2O)](NO3)∙1.16H2O (4), and {[Co(H2dapsc)(H2O)(N3)][Co(H2dapsc)(N3)2]}N3∙4H2O (5). The combined analyses of the experimental DС and AC magnetic data of the complexes (1–5) and two other earlier described those of this family [Co(H2dapsc)(H2O)2)](NO3)2∙2H2O (6) and [Co(H2dapsc)(Cl)(H2O)]Cl∙2H2O (7), their theoretical description and the ab initio CASSCF/NEVPT2 calculations reveal large easy-plane magnetic anisotropies for all complexes (D = + 35 − 40 cm‒1). All complexes under consideration demonstrate slow magnetic relaxation with dominant Raman and direct spin–phonon processes at static magnetic field and so they belong to the class of field-induced single-ion magnets (SIMs).
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35
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El-Sonbati A, Mahmoud W, Mohamed GG, Diab M, Morgan S, Abbas S. Synthesis, characterization of Schiff base metal complexes and their biological investigation. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5048] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- A.Z. El-Sonbati
- Chemistry Department, Faculty of Science; Damietta University; Egypt
| | - W.H. Mahmoud
- Chemistry Department, Faculty of Science; Cairo University; Giza 12613 Egypt
| | - Gehad G. Mohamed
- Chemistry Department, Faculty of Science; Cairo University; Giza 12613 Egypt
- Egypt Nanotechnology Center; Cairo University; El-Sheikh Zayed, 6 October 12588 Egypt
| | - M.A. Diab
- Chemistry Department, Faculty of Science; Damietta University; Egypt
| | - Sh.M. Morgan
- Environmental Monitoring Laboratory, Ministry of Health; Port Said Egypt
| | - S.Y. Abbas
- Chemistry Department, Faculty of Science; Damietta University; Egypt
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36
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Recent developments in penta-, hexa- and heptadentate Schiff base ligands and their metal complexes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.03.010] [Citation(s) in RCA: 189] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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37
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Zhou X, Pang X, Nie L, Zhu C, Zhuo K, Zhuo Q, Chen Z, Liu G, Zhang H, Lin Z, Xia H. Successive modification of polydentate complexes gives access to planar carbon- and nitrogen-based ligands. Nat Commun 2019; 10:1488. [PMID: 30940808 PMCID: PMC6445293 DOI: 10.1038/s41467-019-09367-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 03/08/2019] [Indexed: 11/15/2022] Open
Abstract
Polydentate complexes containing combinations of nitrogen and carbon (N and C) ligating atoms are among the most fundamental and ubiquitous molecules in coordination chemistry, yet the formation of such complexes with planar high-coordinate N/C sites remains challenging. Herein, we demonstrate an efficient route to access related complexes with tetradentate CCCN and pentadentate CCCCN and NCCCN cores by successive modification of the coordinating atoms in complexes with a CCCC core. Combined experimental and computational studies reveal that the rich reactivity of metal-carbon bonds and the inherent aromaticity of the metallacyclic skeletons play key roles in these transformations. This strategy addresses the paucity of synthetic approaches to mixed N/C planar pentadentate chelating species and provides valuable insights into the synthesis of carbon-based high-coordinate complexes. Furthermore, the resulting complexes are the examples of organometallic species with combined photoacoustic, photothermal, and sonodynamic properties, which makes them promising for application in related areas.
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Affiliation(s)
- Xiaoxi Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Xin Pang
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Centre for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, 361102, Xiamen, China
| | - Liming Nie
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Centre for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, 361102, Xiamen, China
| | - Congqing Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Kaiyue Zhuo
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Qingde Zhuo
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Zhixin Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Gang Liu
- State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, Centre for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, 361102, Xiamen, China
| | - Hong Zhang
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China.
| | - Zhenyang Lin
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, HK, Hong Kong
| | - Haiping Xia
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
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38
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Bauer A, Jäschke A, Shams Aldin Azzam S, Glasneck F, Ullmann S, Kersting B, Brendler V, Schmeide K, Stumpf T. Multidentate extracting agents based on calix[4]arene scaffold – UVI/EuIII separation studies. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.12.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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39
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Wei XQ, Wang KJ, Wu DQ, Shao D, Shi L, Shen FX, Wei HY, Wang XY. Two three-dimensional [Mo III(CN) 7] 4−-based magnets showing new topologies and ferrimagnetic ordering below 80 K. Dalton Trans 2019; 48:8843-8852. [DOI: 10.1039/c9dt01290g] [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
Two 3D [MoIII(CN)7]4−-based magnets with new topologies and ferrimagnetic ordering below 80 K have been prepared using different amides as auxiliary ligands.
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Affiliation(s)
- Xiao-Qin Wei
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Kang-Jie Wang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Dong-Qing Wu
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Dong Shao
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Le Shi
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Fu-Xing Shen
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Hai-Yan Wei
- Jiangsu Key Laboratory of Biofunctional Materials
- School of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing
- China
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
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40
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Senthil Kumar K, Bayeh Y, Gebretsadik T, Elemo F, Gebrezgiabher M, Thomas M, Ruben M. Spin-crossover in iron(ii)-Schiff base complexes. Dalton Trans 2019; 48:15321-15337. [DOI: 10.1039/c9dt02085c] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A collective overview of iron(ii)-Schiff base complexes, showing abrupt and hysteretic SCO suitable for device applications, and the structure–property relationships governing the SCO of the complexes in the solid-state is presented.
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Affiliation(s)
- Kuppusamy Senthil Kumar
- Institut de Physique et de Chimie des Matériaux-Université de Strasbourg23
- F-67034 Strasbourg
- France
| | - Yosef Bayeh
- Department of Industrial Chemistry
- Addis Ababa Science and Technology University
- Addis Ababa
- Ethiopia
| | - Tesfay Gebretsadik
- Department of Industrial Chemistry
- Addis Ababa Science and Technology University
- Addis Ababa
- Ethiopia
| | - Fikre Elemo
- Department of Industrial Chemistry
- Addis Ababa Science and Technology University
- Addis Ababa
- Ethiopia
| | - Mamo Gebrezgiabher
- Department of Industrial Chemistry
- Addis Ababa Science and Technology University
- Addis Ababa
- Ethiopia
| | - Madhu Thomas
- Department of Industrial Chemistry
- Addis Ababa Science and Technology University
- Addis Ababa
- Ethiopia
| | - Mario Ruben
- Institut de Physique et de Chimie des Matériaux-Université de Strasbourg23
- F-67034 Strasbourg
- France
- Institute of Nanotechnology
- Karlsruhe Institute of Technology
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41
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Cirulli M, Kaur A, Lewis JEM, Zhang Z, Kitchen JA, Goldup SM, Roessler MM. Rotaxane-Based Transition Metal Complexes: Effect of the Mechanical Bond on Structure and Electronic Properties. J Am Chem Soc 2018; 141:879-889. [DOI: 10.1021/jacs.8b09715] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Martina Cirulli
- School of Biological and Chemical Sciences and Materials Research Institute, Queen Mary University of London, Mile End Road, London E1 4NS, U.K
| | - Amanpreet Kaur
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - James E. M. Lewis
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
- Department of Chemistry, Imperial College London, Molecular Sciences Research Hub, 80 Wood Lane, London, W12 0BZ, U.K
| | - Zhihui Zhang
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - Jonathan A. Kitchen
- Chemistry, Institute of Natural and Mathematical Sciences, Massey University, Auckland, New Zealand
| | - Stephen M. Goldup
- Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - Maxie M. Roessler
- School of Biological and Chemical Sciences and Materials Research Institute, Queen Mary University of London, Mile End Road, London E1 4NS, U.K
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42
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González D, Arrué R, Matamala‐Cea E, Arancibia R, Hamon P, Cador O, Roisnel T, Hamon J, Novoa N. Homoleptic Co
II
, Ni
II
, Cu
II
, and Zn
II
Complexes Based on 8‐Hydroxylquinoline Schiff Base Derivative: a Combined Synthetic, Spectral, Structural, and Magnetic Study. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801160] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Déborah González
- Laboratorio de Química Inorgánica y Organometálica Departamento de Química Analítica e Inorgánica Universidad de Concepción Edmundo Larenas 129 Casilla 160‐C Concepción Chile
| | - Ramón Arrué
- Laboratorio de Química Inorgánica y Organometálica Departamento de Química Analítica e Inorgánica Universidad de Concepción Edmundo Larenas 129 Casilla 160‐C Concepción Chile
| | - Edison Matamala‐Cea
- Laboratorio de Química Inorgánica y Organometálica Departamento de Química Analítica e Inorgánica Universidad de Concepción Edmundo Larenas 129 Casilla 160‐C Concepción Chile
| | - Rodrigo Arancibia
- Laboratorio de Química Inorgánica y Organometálica Departamento de Química Analítica e Inorgánica Universidad de Concepción Edmundo Larenas 129 Casilla 160‐C Concepción Chile
| | - Paul Hamon
- Univ Rennes, CNRS ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226 35000 Rennes France
| | - Olivier Cador
- Univ Rennes, CNRS ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226 35000 Rennes France
| | - Thierry Roisnel
- Univ Rennes, CNRS ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226 35000 Rennes France
| | - Jean‐René Hamon
- Univ Rennes, CNRS ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226 35000 Rennes France
| | - Néstor Novoa
- Laboratorio de Química Inorgánica y Organometálica Departamento de Química Analítica e Inorgánica Universidad de Concepción Edmundo Larenas 129 Casilla 160‐C Concepción Chile
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43
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Swamy P CA, Solel E, Reany O, Keinan E. Synthetic Evolution of the Multifarene Cavity from Planar Predecessors. Chemistry 2018; 24:15319-15328. [PMID: 30058729 DOI: 10.1002/chem.201803189] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 07/28/2018] [Indexed: 01/08/2023]
Abstract
The stepwise evolution of curved multifarene structures from planar precursors is demonstrated, highlighting three architectural design elements: 1) employment of various aromatic units, 2) changing the hybridization of the linking atoms from sp2 to sp3 , and 3) rigidification of the system by the introduction of five-membered rings. Similar design elements have been employed to transform graphene sheets into curved carbon structures. Specifically, the stepwise synthetic evolution of multifarene[2+2], which has a curved, quite rigid structure, begins with a planar, tetraimine precursor, conversion to pairs of vicinal diamines, and the transformation of these pairs to cyclic thiourea groups. This process was probed by NMR spectroscopy and X-ray crystallography. Since varying the carbonylation conditions resulted in carbamates or thiocarbamates rather than the urea or thiourea isomers, the isomeric interconversion was studied both experimentally and by DFT computations. The carbamate versus urea preference was found to reflect either kinetic or thermodynamic control, respectively.
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Affiliation(s)
- Chinna Ayya Swamy P
- The Schulich faculty of Chemistry, Technion-Israel Institute of Technology, Technion city, 32000, Haifa, Israel
| | - Ephrath Solel
- The Schulich faculty of Chemistry, Technion-Israel Institute of Technology, Technion city, 32000, Haifa, Israel
| | - Ofer Reany
- The Avinoam Adam Department of Natural Sciences, The Open University of Israel, 1 University road, P. O. Box 808, Ra'anana, 4353701, Israel
| | - Ehud Keinan
- The Schulich faculty of Chemistry, Technion-Israel Institute of Technology, Technion city, 32000, Haifa, Israel
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44
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Drahoš B, Herchel R, Trávníček Z. Single-Chain Magnet Based on 1D Polymeric Azido-Bridged Seven-Coordinate Fe(II) Complex with a Pyridine-Based Macrocyclic Ligand. Inorg Chem 2018; 57:12718-12726. [DOI: 10.1021/acs.inorgchem.8b01798] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bohuslav Drahoš
- Division of Biologically Active Complexes and Molecular Magnets, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71 Olomouc, Czech Republic
| | - Radovan Herchel
- Division of Biologically Active Complexes and Molecular Magnets, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71 Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Division of Biologically Active Complexes and Molecular Magnets, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacký University, Šlechtitelů 27, CZ-783 71 Olomouc, Czech Republic
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45
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Yang H, Li R, Li D, Zeng S, Dou J. A Pentanuclear Cobalt Complex with two [CoII
(CH3
O)3
]-
Units Wrapping a Triangular [CoIII
3
O]7+
Core: Synthesis, Structure, and Magnetic Properties. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hua Yang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology; School of Chemistry and Chemical Engineering; Liaocheng University; 252000 Liaocheng P. R. China
| | - Ruiling Li
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology; School of Chemistry and Chemical Engineering; Liaocheng University; 252000 Liaocheng P. R. China
| | - Dacheng Li
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology; School of Chemistry and Chemical Engineering; Liaocheng University; 252000 Liaocheng P. R. China
| | - Suyuan Zeng
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology; School of Chemistry and Chemical Engineering; Liaocheng University; 252000 Liaocheng P. R. China
| | - Jianmin Dou
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology; School of Chemistry and Chemical Engineering; Liaocheng University; 252000 Liaocheng P. R. China
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46
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Phenoxazinone synthase activity of two iron(III) complexes comprising the same Schiff base ligand: Biomimetic functional model and mechanistic investigation. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2018.01.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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47
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Handa M, Kanagawa K, Yano N, Yairi H, Okuno A, Mitsumi M, Kataoka Y. Synthesis and properties of a trinuclear copper(II) complex of a ligand with phthalocyanine and Schiff-base coordination sites. J PORPHYR PHTHALOCYA 2018. [DOI: 10.1142/s108842461850013x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A trinuclear copper(II) phthalocyanine complex was synthesized by chelate coordination of the peripherally introduced Schiff-base nitrogen and phenoxide oxygen on the Cu(pc) core to a copper(II) ion. The magnetic, spectral and electrochemical properties were compared with those of the precursor mononuclear Cu(pc) complex with the NO chelate coordination site and a mononuclear Schiff-base copper(II) complex corresponding to the central bis-chelated unit of the title trinuclear complex. A stronger aggregating nature of the trinuclear complex compared with the precursor mononuclear Cu(pc) complex was confirmed by the spectral change of the Q band feature coming from the coordination to the copper(II) ion in dichloromethane. Two successive pc-ring reduction waves were not observed for the trinuclear complex in dichloromethane containing TBP(PF[Formula: see text], alternatively showing an irreversible wave in the reduction side. The central bis-chelated copper(II) ion was considered to play an important role for the redox behavior of the trinuclear complex.
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Affiliation(s)
- Makoto Handa
- Department of Chemistry, Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Kenichi Kanagawa
- Department of Chemistry, Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Natsumi Yano
- Department of Chemistry, Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Haruki Yairi
- Department of Chemistry, Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Airi Okuno
- Department of Chemistry, Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Minoru Mitsumi
- Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama 700-0005, Japan
| | - Yusuke Kataoka
- Department of Chemistry, Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
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48
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Xu YP, Chen WT, Yi C, Huang JG, Zhang DW, Wang YF. A Novel Manganese Complex with Mixed Ligands: Preparation, Structure, Photoluminescent and Semiconductive Properties. JOURNAL OF CHEMICAL RESEARCH 2018. [DOI: 10.3184/174751918x15212927064594] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A manganese complex with mixed ligands, [Mn(2,2′-biim)2(4,4′-bipy)] n[Mn(2,2′-biim)3]2 n6 n(ClO4)•8 nH2O (2,2′-biim = 2,2′-biimidazole; 4,4′-bipy = 4,4′-bipyridine), has been obtained by a hydrothermal procedure and its structure determined by single-crystal X-ray crystallography. A two-dimensional (2-D) supramolecular layer is established through hydrogen-bonding interactions. Solid-state photoluminescence measurement reveals that this complex shows a blue light emission. Solid-state diffuse reflectance determination uncovers the presence of a narrow optical band gap of 2.18 eV in this complex.
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Affiliation(s)
- Ya-Ping Xu
- Institute of Applied Chemistry, Jiangxi Province Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Jinggangshan University, 343009, Ji'an, Jiangxi, P. R. China
| | - Wen-Tong Chen
- Institute of Applied Chemistry, Jiangxi Province Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Jinggangshan University, 343009, Ji'an, Jiangxi, P. R. China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Cai Yi
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning 116000, China
| | - Jian-Gen Huang
- Institute of Applied Chemistry, Jiangxi Province Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Jinggangshan University, 343009, Ji'an, Jiangxi, P. R. China
| | - Ding-Wa Zhang
- Institute of Applied Chemistry, Jiangxi Province Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Jinggangshan University, 343009, Ji'an, Jiangxi, P. R. China
| | - Yin-Feng Wang
- Institute of Applied Chemistry, Jiangxi Province Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Jinggangshan University, 343009, Ji'an, Jiangxi, P. R. China
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Unsymmetrical tripodal amines containing one pyridine-armed with N3O2-donor set: Coordination chemistry with zinc(II) and theoretical studies. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.12.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Anwar MU, Al-Harrasi A, Gavey EL, Pilkington M, Rawson JM, Thompson LK. A new nitrogen rich open chain diazine ligand system: synthesis coordination chemistry and magneto-structural studies. Dalton Trans 2018; 47:2511-2521. [PMID: 29302666 DOI: 10.1039/c7dt03845c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and coordination chemistry of a new series of open chain diazine based ligands (L3aH2, L3bH2, and L3cH2) is reported. The ligands comprise a central disubstituted bipyridine moiety with two bridging alkoxide oxygen donors, together with diazine and pyridine terminal groups strategically located to coordinate three metal centres. Reactions of L3aH2 and L3bH2 with CuX2 (X- = ClO4, Cl, NO3) yield a trinuclear complex (1) and 1-D copper chains (2, 3). In these complexes the ligands bind copper ions via Nbipyridne, trans Ndiazine, Ohydrazone, and Npyridne donors while vacant sites are occupied by counter ions or solvent molecules (methanol, water, acetonitrile). Reaction of L3cH2 with MnCl2 affords a linear trinuclear Mn complex (4), where the Mn(ii) ions are connected via μ2-Ohydrazone linkers with no N-N bridging. Reaction of L3aH2 with Fe(SO3CF3)2 yields a tetranuclear mixed valence Fe complex (5), in which both trans N-N and Ohydrazone bridging is observed. Magnetic studies reveal the presence of moderate to strong antiferromagnetic interactions in complexes 1-4 while a mix of ferromagnetic and antiferromagnetic interactions is observed in complex 5.
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Affiliation(s)
- Muhammad U Anwar
- University of Nizwa, Chair of Oman's Medicinal Plants and Marine Natural Products, P O Box 33, PC 616, Birkat Almouz., Nizwa, Oman.
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