Europium(III), Terbium(III), and Gadolinium(III) Oxamato-Based Coordination Polymers: Visible Luminescence and Slow Magnetic Relaxation

The reaction of aqueous solutions of EuIII, TbIII, and GdIII ions with Na2Hpcpa [H3pcpa = N-(4-carboxyphenyl)oxamic acid] afforded three new isostructural oxamate-containing lanthanide(III) coordination polymers of general formula {LnIII2(Hpcpa)3(H2O)5·H2O}n [Ln = Eu (1),Tb (2), and Gd(3)]. Their structure is made up of neutral zigzag chains running parallel to the [101] direction where double syn-syn carboxylate(oxamate)-bridged dilanthanide(III) pairs (Ln1 and Ln2) are linked by three Hpcpa2- ligands, one of them with the μ-κ2O,O':κO″ coordination mode and the other two with the μ3-κ2O,O':κO″:κO'''. Additionally, two of those chains are interlinked through hydrogen bonding and π-π type in…

Mononuclear lanthanide(III)-oxamate complexes as new photoluminescent field-induced single-molecule magnets: solid-state photophysical and magnetic properties.

Implementing additional optical (luminescent) properties into the well-known class of single-molecule magnets (SMMs) is considered as a promising route toward obtaining the next generation of optomagnetic materials for quantum information storage and computing. Herein, we report a joint optical and magneto-structural study for the two novel series of lanthanide(iii) complexes of general formula Bu4N[LnIII(HL)4(dmso)]·nH2O where H2L = N-(4-Xphenyl)oxamic acid with X = Cl and n = 2 [Ln = Eu (1_Cl), Gd (2_Cl), Dy (3_Cl), and Tb (4_Cl)] and X = F and n = 3 [Ln = Eu (1_F), Gd (2_F), Dy (3_F), and Tb (4_F)]. All these compounds are mononuclear species with each lanthanide(iii) cation in a low-sym…

2D and 3D mixed MII/CuIImetal–organic frameworks (M = Ca and Sr) withN,N′-2,6-pyridinebis(oxamate) and oxalate: preparation and magneto-structural study

Three heterobimetallic complexes of formula [Ca2Cu3(mpyba)2(2-apyma)(H2O)7]·8.3H2O (1), [Sr2Cu3(mpyba)2(2-apyma)(H2O)8]·11.6H2O (2) and [Sr4.5Cu4(mpyba)4(ox)(H2O)20]·8.5H2O (3) [H4mpyba = N,N'-2,6-pyridinebis(oxamic acid), 2-apyma = 2-(6-aminopyridinyl)oxamate and ox = oxalate] have been synthesized and structurally characterized. Complexes 1 and 2 are isostructural compounds, with tricopper(ii) units having mpyba and its hydrolytic product (2-apyma) as ligands. They are interlinked through strontium(ii) (1) and calcium(ii) (2) ions to afford neutral two-dimensional networks. Two of the copper(ii) ions are five-coordinate in distorted square pyramidal (Cu3) and trigonal bipyramidal (Cu1) su…

A giant hybrid organic-inorganic octahedron from a narrow rim carboxylate calixarene.

Here we discovered an unprecedented giant octahedral coordination compound bearing 16 Zn2+, 12 Na+, 8 O2-, 4 OH-, 13 H2O and 6 L4- ligands [L4- = fully deprotonated tetra(carboxymethoxy)calix[4]arene]. Its structure was elucidated by single-crystal X-ray diffraction, wavelength-dispersive X-ray spectroscopy and MALDI-TOF mass spectrometry. This compound, Zn8Na6L6⊃Zn8Na6O8(OH)4(H2O)13 (external⊃internal), has eight tetrahedral zinc ions forming the coordination vertices of an outermost cube where carboxylate groups from the sodium calixarenes are anchored. Its core consists of eight Zn2+, six Na+, eight O2-, and four OH- distributed over three layers, besides thirteen coordinated H2O molecul…

Cobalt(II) and copper(II) assembling through a functionalized oxamate-type ligand

Two new metal complexes of formula {[Co(Hpcpa)(H2O)3]n� 3/2nH2O} (1) and [Cu2(MeHpcpa)4(MeOH)2] � H2O� 3.68 MeOH (2 )[ H 3pcpa = N-(4-carboxyphenyl)oxamic acid and MeH2pcpa = methyl ester derivative of H3pcpa] have been synthesized and their structures determined by X-ray diffraction. 1 is a neutral zigzag chain of cobalt(II) ions bridged by Hpcpa 2� ligands exhibiting the bidentate/monodentate coordination mode. Each cobalt(II) ion is six-coordinate with three mer positioned water molecules, two oxamate-oxygens from a Hpcpa 2� ligand and a carboxylate-oxygen from another Hpcpa 2� group building a somewhat distorted octahedral surrounding. The intrachain cobalt–cobalt separation is 11.326(2…

Synthesis, crystal structure and magnetic properties of the helical oxalate-bridged copper(II) chain {[(CH3)4N]2[Cu(C2O4)2] · H2O}n

Abstract The preparation, crystal structure and magnetic properties of a new oxalate-containing copper(II) chain of formula {[(CH3)4N]2[Cu(C2O4)2] · H2O}n (1) [(CH3)4N+ = tetramethylammonium cation] are reported. The structure of 1 consists of anionic oxalate-bridged copper(II) chains, tetramethylammoniun cations and crystallization water molecules. Each copper(II) ion in 1 is surrounded by three oxalate ligands, one being bidentate and the other two exhibiting bis-bidenate coordination modes. Although all the tris-chelated copper(II) units from a given chain exhibit the same helicity, adjacent chains have opposite helicities and then an achiral structure results. Variable-temperature magne…

From Paramagnetic to Single‐Molecule Magnet Behaviour in Heterobimetallic Compounds Containing the Tetrakis(thiocyanato‐ κN )cobaltate(II) Anion

Synthesis, crystal structure and magnetic properties of [Co(bpcam)2]ClO4·dmso·H2O, [Co(bpcam)2]2[Co(NCS)4]·dmso·H2O and [Ni(bpcam)2]·H2O [Hbpcam = bis(2-pyrimidylcarbonyl)amide]

The preparation, spectroscopic characterization, structural study and magnetic investigation of three new complexes of formula [Co(bpcam)2]ClO4·dmso·H2O (1), [Co(bpcam)2]2[Co(NCS)4]·dmso·H2O (2) and [Ni(bpcam)2]·H2O (3) [Hbpcam = bis(2-pyrimidylcarbonyl)amide] are reported. Each bpcam group in 1–3 acts as a tridentate ligand being coordinated to the cobalt(III) (1 and 2)/nickel(II) (3) ions through three nitrogen atoms in a mer-arrangement. Six-coordinate cobalt(III) and nickel(II) occur in 1 and 3 respectively, whereas six-coordinate cobalt(III) and four-coordinate cobalt(II) coexist in 2. Cyclic voltammetry of 1 in acetonitrile shows the occurrence of one quasi reversible CoIII ↔ CoII pro…

Polymorphic Derivatives of NiII and CoII Mesocates with 3D Networks and “Brick and Mortar” Structures: Preparation, Structural Characterization, and Cryomagnetic Investigation of New Single-Molecule Magnets

In this work we describe the preparation, spectroscopic, thermal and structural characterization, and cryomagnetic investigation of four new polymorphic derivatives of the [M2(H2mpba)3]2– mesocate ...

Building-up host-guest helicate motifs and chains: a magneto-structural study of new field-induced cobalt-based single-ion magnets.

In this work, we present the synthetic pathway, a refined structural description, complete solid-state characterization and the magnetic properties of four new cobalt(II) compounds of formulas [Co(H2O)6][Co2(H2mpba)3]·2H2O·0.5dmso (1), [Co(H2O)6][Co2(H2mpba)3]·3H2O·0.5dpss (2), [Co2(H2mpba)2(H2O)4]n·4nH2O (3), and [Co2(H2mpba)2(CH3OH)2(H2O)2]n·0.5nH2O·2ndpss (4) [dpss = 2,2′-dipyridyldisulfide and H4mpba = 1,3-phenylenebis(oxamic) acid], where 2 and 4 were obtained from [Co(dpss)Cl2] (Pre-I) as the source of cobalt(II). All four compounds are air-stable and were prepared under ambient conditions. 1 and 2 were obtained from a slow diffusion method [cobalt(II) : H2mpba2− molar ratio used 1 : …

Dicopper(II) Metallacyclophanes with N,N'-2,6-Pyridinebis(oxamate): Solution Study, Synthesis, Crystal Structures, and Magnetic Properties.

The complexing ability of copper(II) in solution by the ligand N,N'-2,6-pyridinebis(oxamic acid) (H4mpyba, H4L) was determined through potentiometric and UV-vis spectroscopy at 25 °C and 0.15 M NaCl. The logarithms of the equilibrium constants for its copper(II) complexes according to the eqs 2H2L + 2Cu ⇆ [Cu2(H2L)2], 2H2L + 2Cu ⇆ [Cu2(H2L) (HL)] + H, 2H2L + 2Cu ⇆ [Cu2(HL)2] + 2H, 2H2L + 2Cu ⇆ [Cu2(HL)(L)] + 3H, and 2H2L + 2Cu ⇆ [Cu2L2] + 4H were 12.02(7), 8.04(5), 1.26(6), -7.51(6), and -16.36(6), respectively. The knowledge of the solution behavior has supported the synthesis of three new compounds bearing the common building block Cu2L2(4-). Their formulas are (Me4N)4[Cu2(mpyba)2(H2O)2]·…

CCDC 1830425: Experimental Crystal Structure Determination

Related Article: Raphael C. A. Vaz, Isabela O. Esteves, Willian X. C. Oliveira, João Honorato, Felipe T. Martins, Lippy F. Marques, Guilherme L. dos Santos, Ricardo O. Freire, Larissa T. Jesus, Emerson F. Pedroso, Wallace C. Nunes, Miguel Julve, Cynthia L. M. Pereira|2020|Dalton Trans.|49|16106|doi:10.1039/D0DT02497J

CCDC 1898457: Experimental Crystal Structure Determination

Related Article: Ludmila dos S. Mariano, Iara M. L. Rosa, Nathália R. De Campos, Antônio C. Doriguetto, Danielle F. Dias, Walace D. do Pim, Ana Karoline S.M. Valdo, Felipe T. Martins, Marcos A. Ribeiro, Elgte E. B. De Paula, Emerson F. Pedroso, Humberto O. Stumpf, Joan Cano, Francesc Lloret, Miguel Julve, Maria Vanda Marinho|2020|Cryst.Growth Des.|20|2462|doi:10.1021/acs.cgd.9b01638

CCDC 1958348: Experimental Crystal Structure Determination

Related Article: Raphael C. A. Vaz, Isabela O. Esteves, Willian X. C. Oliveira, João Honorato, Felipe T. Martins, Lippy F. Marques, Guilherme L. dos Santos, Ricardo O. Freire, Larissa T. Jesus, Emerson F. Pedroso, Wallace C. Nunes, Miguel Julve, Cynthia L. M. Pereira|2020|Dalton Trans.|49|16106|doi:10.1039/D0DT02497J

CCDC 1898455: Experimental Crystal Structure Determination

Related Article: Ludmila dos S. Mariano, Iara M. L. Rosa, Nathália R. De Campos, Antônio C. Doriguetto, Danielle F. Dias, Walace D. do Pim, Ana Karoline S.M. Valdo, Felipe T. Martins, Marcos A. Ribeiro, Elgte E. B. De Paula, Emerson F. Pedroso, Humberto O. Stumpf, Joan Cano, Francesc Lloret, Miguel Julve, Maria Vanda Marinho|2020|Cryst.Growth Des.|20|2462|doi:10.1021/acs.cgd.9b01638

CCDC 1484384: Experimental Crystal Structure Determination

Related Article: Lucas H. G. Kalinke, Jocielle C. O. Cardoso, Renato Rabelo, Ana K. Valdo, Felipe T. Martins, Joan Cano, Miguel Julve, Francesc Lloret, Danielle Cangussu|2018|Eur.J.Inorg.Chem.||816|doi:10.1002/ejic.201701177

CCDC 1830430: Experimental Crystal Structure Determination

Related Article: Raphael C. A. Vaz, Isabela O. Esteves, Willian X. C. Oliveira, João Honorato, Felipe T. Martins, Lippy F. Marques, Guilherme L. dos Santos, Ricardo O. Freire, Larissa T. Jesus, Emerson F. Pedroso, Wallace C. Nunes, Miguel Julve, Cynthia L. M. Pereira|2020|Dalton Trans.|49|16106|doi:10.1039/D0DT02497J

CCDC 1449346: Experimental Crystal Structure Determination

Related Article: Renato Rabelo, Ana K. Valdo, Craig Robertson, Jim A. Thomas, Humberto O. Stumpf, Felipe T. Martins, Emerson F. Pedroso, Miguel Julve, Francesc Lloret, Danielle Cangussu|2017|New J.Chem.|41|6911|doi:10.1039/C7NJ00526A

CCDC 1883575: Experimental Crystal Structure Determination

Related Article: Nathália R. de Campos, Cintia A. Simosono, Iara M. Landre Rosa, Rafaela M. R. da Silva, Antônio C. Doriguetto, Walace D. do Pim, Tatiana R. Gomes Simões, Ana Karoline S. M. Valdo, Felipe T. Martins, Charlie V. Sarmiento, Wallace C. Nunes, Guilherme P. Guedes, Emerson F. Pedroso, Cynthia L. M. Pereira, Humberto O. Stumpf, Francesc Lloret, Miguel Julve, Maria Vanda Marinho|2021|Dalton Trans.|50|10707|doi:10.1039/D1DT01693H

CCDC 2002706: Experimental Crystal Structure Determination

Related Article: Raphael C. A. Vaz, Isabela O. Esteves, Willian X. C. Oliveira, João Honorato, Felipe T. Martins, Lippy F. Marques, Guilherme L. dos Santos, Ricardo O. Freire, Larissa T. Jesus, Emerson F. Pedroso, Wallace C. Nunes, Miguel Julve, Cynthia L. M. Pereira|2020|Dalton Trans.|49|16106|doi:10.1039/D0DT02497J

CCDC 1449347: Experimental Crystal Structure Determination

Related Article: Renato Rabelo, Ana K. Valdo, Craig Robertson, Jim A. Thomas, Humberto O. Stumpf, Felipe T. Martins, Emerson F. Pedroso, Miguel Julve, Francesc Lloret, Danielle Cangussu|2017|New J.Chem.|41|6911|doi:10.1039/C7NJ00526A

CCDC 1958349: Experimental Crystal Structure Determination

Related Article: Raphael C. A. Vaz, Isabela O. Esteves, Willian X. C. Oliveira, João Honorato, Felipe T. Martins, Lippy F. Marques, Guilherme L. dos Santos, Ricardo O. Freire, Larissa T. Jesus, Emerson F. Pedroso, Wallace C. Nunes, Miguel Julve, Cynthia L. M. Pereira|2020|Dalton Trans.|49|16106|doi:10.1039/D0DT02497J

CCDC 1530054: Experimental Crystal Structure Determination

Related Article: Tamires S. Fernandes, Wanessa D. C. Melo, Lucas H. G. Kalinke, Renato Rabelo, Ana K. Valdo, Cameron C. da Silva, Felipe T. Martins, Pedro Amorós, Francesc Lloret, Miguel Julve, Danielle Cangussu|2018|Dalton Trans.|47|11539|doi:10.1039/C8DT01686K

CCDC 1883574: Experimental Crystal Structure Determination

Related Article: Nathália R. de Campos, Cintia A. Simosono, Iara M. Landre Rosa, Rafaela M. R. da Silva, Antônio C. Doriguetto, Walace D. do Pim, Tatiana R. Gomes Simões, Ana Karoline S. M. Valdo, Felipe T. Martins, Charlie V. Sarmiento, Wallace C. Nunes, Guilherme P. Guedes, Emerson F. Pedroso, Cynthia L. M. Pereira, Humberto O. Stumpf, Francesc Lloret, Miguel Julve, Maria Vanda Marinho|2021|Dalton Trans.|50|10707|doi:10.1039/D1DT01693H

CCDC 1883576: Experimental Crystal Structure Determination

Related Article: Nathália R. de Campos, Cintia A. Simosono, Iara M. Landre Rosa, Rafaela M. R. da Silva, Antônio C. Doriguetto, Walace D. do Pim, Tatiana R. Gomes Simões, Ana Karoline S. M. Valdo, Felipe T. Martins, Charlie V. Sarmiento, Wallace C. Nunes, Guilherme P. Guedes, Emerson F. Pedroso, Cynthia L. M. Pereira, Humberto O. Stumpf, Francesc Lloret, Miguel Julve, Maria Vanda Marinho|2021|Dalton Trans.|50|10707|doi:10.1039/D1DT01693H

CCDC 1053439: Experimental Crystal Structure Determination

Related Article: Tamires S. Fernandes, Ramon S. Vilela, Ana K. Valdo, Felipe T. Martins, Enrique García-España, Mario Inclán, Joan Cano, Francesc Lloret, Miguel Julve, Humberto O. Stumpf, and Danielle Cangussu|2016|Inorg.Chem.|55|2390|doi:10.1021/acs.inorgchem.5b02786

CCDC 1484386: Experimental Crystal Structure Determination

Related Article: Lucas H. G. Kalinke, Jocielle C. O. Cardoso, Renato Rabelo, Ana K. Valdo, Felipe T. Martins, Joan Cano, Miguel Julve, Francesc Lloret, Danielle Cangussu|2018|Eur.J.Inorg.Chem.||816|doi:10.1002/ejic.201701177

CCDC 1898454: Experimental Crystal Structure Determination

Related Article: Ludmila dos S. Mariano, Iara M. L. Rosa, Nathália R. De Campos, Antônio C. Doriguetto, Danielle F. Dias, Walace D. do Pim, Ana Karoline S.M. Valdo, Felipe T. Martins, Marcos A. Ribeiro, Elgte E. B. De Paula, Emerson F. Pedroso, Humberto O. Stumpf, Joan Cano, Francesc Lloret, Miguel Julve, Maria Vanda Marinho|2020|Cryst.Growth Des.|20|2462|doi:10.1021/acs.cgd.9b01638

CCDC 1530055: Experimental Crystal Structure Determination

Related Article: Tamires S. Fernandes, Wanessa D. C. Melo, Lucas H. G. Kalinke, Renato Rabelo, Ana K. Valdo, Cameron C. da Silva, Felipe T. Martins, Pedro Amorós, Francesc Lloret, Miguel Julve, Danielle Cangussu|2018|Dalton Trans.|47|11539|doi:10.1039/C8DT01686K

CCDC 1993352: Experimental Crystal Structure Determination

Related Article: Nathália R. de Campos, Cintia A. Simosono, Iara M. Landre Rosa, Rafaela M. R. da Silva, Antônio C. Doriguetto, Walace D. do Pim, Tatiana R. Gomes Simões, Ana Karoline S. M. Valdo, Felipe T. Martins, Charlie V. Sarmiento, Wallace C. Nunes, Guilherme P. Guedes, Emerson F. Pedroso, Cynthia L. M. Pereira, Humberto O. Stumpf, Francesc Lloret, Miguel Julve, Maria Vanda Marinho|2021|Dalton Trans.|50|10707|doi:10.1039/D1DT01693H

CCDC 1053438: Experimental Crystal Structure Determination

Related Article: Tamires S. Fernandes, Ramon S. Vilela, Ana K. Valdo, Felipe T. Martins, Enrique García-España, Mario Inclán, Joan Cano, Francesc Lloret, Miguel Julve, Humberto O. Stumpf, and Danielle Cangussu|2016|Inorg.Chem.|55|2390|doi:10.1021/acs.inorgchem.5b02786

CCDC 1830421: Experimental Crystal Structure Determination

Related Article: Raphael C. A. Vaz, Isabela O. Esteves, Willian X. C. Oliveira, João Honorato, Felipe T. Martins, Lippy F. Marques, Guilherme L. dos Santos, Ricardo O. Freire, Larissa T. Jesus, Emerson F. Pedroso, Wallace C. Nunes, Miguel Julve, Cynthia L. M. Pereira|2020|Dalton Trans.|49|16106|doi:10.1039/D0DT02497J

CCDC 1053437: Experimental Crystal Structure Determination

Related Article: Tamires S. Fernandes, Ramon S. Vilela, Ana K. Valdo, Felipe T. Martins, Enrique García-España, Mario Inclán, Joan Cano, Francesc Lloret, Miguel Julve, Humberto O. Stumpf, and Danielle Cangussu|2016|Inorg.Chem.|55|2390|doi:10.1021/acs.inorgchem.5b02786

CCDC 1530056: Experimental Crystal Structure Determination

Related Article: Tamires S. Fernandes, Wanessa D. C. Melo, Lucas H. G. Kalinke, Renato Rabelo, Ana K. Valdo, Cameron C. da Silva, Felipe T. Martins, Pedro Amorós, Francesc Lloret, Miguel Julve, Danielle Cangussu|2018|Dalton Trans.|47|11539|doi:10.1039/C8DT01686K

CCDC 1484383: Experimental Crystal Structure Determination

Related Article: Lucas H. G. Kalinke, Jocielle C. O. Cardoso, Renato Rabelo, Ana K. Valdo, Felipe T. Martins, Joan Cano, Miguel Julve, Francesc Lloret, Danielle Cangussu|2018|Eur.J.Inorg.Chem.||816|doi:10.1002/ejic.201701177

CCDC 1958345: Experimental Crystal Structure Determination

Related Article: Raphael C. A. Vaz, Isabela O. Esteves, Willian X. C. Oliveira, João Honorato, Felipe T. Martins, Lippy F. Marques, Guilherme L. dos Santos, Ricardo O. Freire, Larissa T. Jesus, Emerson F. Pedroso, Wallace C. Nunes, Miguel Julve, Cynthia L. M. Pereira|2020|Dalton Trans.|49|16106|doi:10.1039/D0DT02497J

CCDC 1898456: Experimental Crystal Structure Determination

Related Article: Ludmila dos S. Mariano, Iara M. L. Rosa, Nathália R. De Campos, Antônio C. Doriguetto, Danielle F. Dias, Walace D. do Pim, Ana Karoline S.M. Valdo, Felipe T. Martins, Marcos A. Ribeiro, Elgte E. B. De Paula, Emerson F. Pedroso, Humberto O. Stumpf, Joan Cano, Francesc Lloret, Miguel Julve, Maria Vanda Marinho|2020|Cryst.Growth Des.|20|2462|doi:10.1021/acs.cgd.9b01638

CCDC 1883577: Experimental Crystal Structure Determination

Related Article: Nathália R. de Campos, Cintia A. Simosono, Iara M. Landre Rosa, Rafaela M. R. da Silva, Antônio C. Doriguetto, Walace D. do Pim, Tatiana R. Gomes Simões, Ana Karoline S. M. Valdo, Felipe T. Martins, Charlie V. Sarmiento, Wallace C. Nunes, Guilherme P. Guedes, Emerson F. Pedroso, Cynthia L. M. Pereira, Humberto O. Stumpf, Francesc Lloret, Miguel Julve, Maria Vanda Marinho|2021|Dalton Trans.|50|10707|doi:10.1039/D1DT01693H

CCDC 1480787: Experimental Crystal Structure Determination

Related Article: Renato Rabelo, Ana K. Valdo, Craig Robertson, Jim A. Thomas, Humberto O. Stumpf, Felipe T. Martins, Emerson F. Pedroso, Miguel Julve, Francesc Lloret, Danielle Cangussu|2017|New J.Chem.|41|6911|doi:10.1039/C7NJ00526A

CCDC 1484385: Experimental Crystal Structure Determination

Related Article: Lucas H. G. Kalinke, Jocielle C. O. Cardoso, Renato Rabelo, Ana K. Valdo, Felipe T. Martins, Joan Cano, Miguel Julve, Francesc Lloret, Danielle Cangussu|2018|Eur.J.Inorg.Chem.||816|doi:10.1002/ejic.201701177

CCDC 1958347: Experimental Crystal Structure Determination

Related Article: Raphael C. A. Vaz, Isabela O. Esteves, Willian X. C. Oliveira, João Honorato, Felipe T. Martins, Lippy F. Marques, Guilherme L. dos Santos, Ricardo O. Freire, Larissa T. Jesus, Emerson F. Pedroso, Wallace C. Nunes, Miguel Julve, Cynthia L. M. Pereira|2020|Dalton Trans.|49|16106|doi:10.1039/D0DT02497J