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SM ISO690:2012 MELNIK, E., KRAVTSOV, Victor, KRAMER, Karl W, VAN LEUSEN, Jan, DECURTINS, Silvio, LIU, Shi-Xia, KOGERLER, Paul, BACA, Svetlana. Versatility of copper(II) coordination compounds with 2,3-bis(2-pyridyl)pyrazine mediated by temperature, solvents and anions choice. In: Solid State Sciences, 2018, vol. 82, pp. 1-12. ISSN 1293-2558. DOI: https://doi.org/10.1016/j.solidstatesciences.2018.05.008 |
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Solid State Sciences | ||||||
Volumul 82 / 2018 / ISSN 1293-2558 /ISSNe 1873-3085 | ||||||
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DOI:https://doi.org/10.1016/j.solidstatesciences.2018.05.008 | ||||||
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Tuning reaction temperatures as well as the variation in starting copper salts and solvents led to the formation of a new series of Cu(II) coordination compounds with 2,3-bis(2-pyridyl)pyrazine (dpp): a mononuclear [Cu(acac)(dpp)(NO3)] (1) complex, two dinuclear [Cu2(acac)2(dpp)(NO3)(H2O)]NO3 (2) and [Cu2(Hdpp)2(ox)(Cl)2(H2O)2]Cl2·6(H2O) (4) complexes, and four coordination polymers {[Cu4(dpp)2(ox)(Cl)6]}n (3), {[Cu4(dpp)2(ox)(NO3)6(H2O)2]∙1.2(H2O)}n (5), {[Cu(dpp)(NO3)](NO3)·(H2O)}n (6) and {[Cu(dpp)(SO4)(H2O)2]}n (7), where acac− = acetylacetonate, ox2− = oxalate. Remarkably, the treatment of Cu(II) chloride dihydrate with dpp in methanol solution led to an unusual in situ condensation of dpp with acac− to produce [Cu2(acdpp)2(Cl)4]·2(MeOH) (8). The structure of 1 consists of neutral, mononuclear [Cu(acac)(dpp)(NO3)] units with acac− and dpp acting as bidentate ligands. In 2, the dpp ligand coordinates in a bis-chelating mode to two Cu(II) ions and bridges them into a dimeric entity, whereas an oxalate linker joins [Cu(Hdpp)(Cl)2(H2O)]+ units into a dimer in 4. Compounds 3, 5, 6 and 7 are 1D chain coordination polymers, which incorporate two symmetry independent metal centers and different bridging ligands: Hdpp+ as a protonated cationic or dpp as a neutral chelating ligand and oxalate, Cl− anions or sulfate di-anions as bridging ligands. Magnetic studies were performed on samples 1 and 2, and the analysis reveals a very weak magnetic exchange coupling mediated via the dpp ligand. |
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Cuvinte-cheie 2, coordination polymers, Copper(II), Crystal engineering, 3-Bis(2-pyridyl)pyrazine complexes, Stacking |
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<?xml version='1.0' encoding='utf-8'?> <resource xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns='http://datacite.org/schema/kernel-3' xsi:schemaLocation='http://datacite.org/schema/kernel-3 http://schema.datacite.org/meta/kernel-3/metadata.xsd'> <identifier identifierType='DOI'>10.1016/j.solidstatesciences.2018.05.008</identifier> <creators> <creator> <creatorName>Melnic, E.I.</creatorName> <affiliation>Institutul de Fizică Aplicată, Moldova, Republica</affiliation> </creator> <creator> <creatorName>Kravţov, V.H.</creatorName> <affiliation>Institutul de Fizică Aplicată, Moldova, Republica</affiliation> </creator> <creator> <creatorName>Kramer, K.</creatorName> <affiliation>Universitatea din Berna, Elveţia, Elveţia</affiliation> </creator> <creator> <creatorName>Van Leusen, J.</creatorName> <affiliation>RWTH Aachen University, Germania</affiliation> </creator> <creator> <creatorName>Decurtins, S.</creatorName> <affiliation>Universitatea din Berna, Elveţia, Elveţia</affiliation> </creator> <creator> <creatorName>Liu, S.</creatorName> <affiliation>Universitatea din Berna, Elveţia, Elveţia</affiliation> </creator> <creator> <creatorName>Kogerler, P.</creatorName> <affiliation>RWTH Aachen University, Germania</affiliation> </creator> <creator> <creatorName>Baca, S.G.</creatorName> <affiliation>Institutul de Fizică Aplicată, Moldova, Republica</affiliation> </creator> </creators> <titles> <title xml:lang='en'>Versatility of copper(II) coordination compounds with 2,3-bis(2-pyridyl)pyrazine mediated by temperature, solvents and anions choice</title> </titles> <publisher>Instrumentul Bibliometric National</publisher> <publicationYear>2018</publicationYear> <relatedIdentifier relatedIdentifierType='ISSN' relationType='IsPartOf'>1293-2558</relatedIdentifier> <subjects> <subject>2</subject> <subject>coordination polymers</subject> <subject>Copper(II)</subject> <subject>Crystal engineering</subject> <subject>3-Bis(2-pyridyl)pyrazine complexes</subject> <subject>Stacking</subject> </subjects> <dates> <date dateType='Issued'>2018-08-13</date> </dates> <resourceType resourceTypeGeneral='Text'>Journal article</resourceType> <descriptions> <description xml:lang='en' descriptionType='Abstract'><p>Tuning reaction temperatures as well as the variation in starting copper salts and solvents led to the formation of a new series of Cu(II) coordination compounds with 2,3-bis(2-pyridyl)pyrazine (dpp): a mononuclear [Cu(acac)(dpp)(NO<sub>3</sub>)] (1) complex, two dinuclear [Cu<sub>2</sub>(acac)<sub>2</sub>(dpp)(NO<sub>3</sub>)(H<sub>2</sub>O)]NO<sub>3</sub> (2) and [Cu<sub>2</sub>(Hdpp)<sub>2</sub>(ox)(Cl)<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>]Cl<sub>2</sub>·6(H<sub>2</sub>O) (4) complexes, and four coordination polymers {[Cu<sub>4</sub>(dpp)<sub>2</sub>(ox)(Cl)<sub>6</sub>]}<sub>n</sub> (3), {[Cu<sub>4</sub>(dpp)<sub>2</sub>(ox)(NO<sub>3</sub>)<sub>6</sub>(H<sub>2</sub>O)<sub>2</sub>]∙1.2(H<sub>2</sub>O)}<sub>n</sub> (5), {[Cu(dpp)(NO<sub>3</sub>)](NO<sub>3</sub>)·(H<sub>2</sub>O)}<sub>n</sub> (6) and {[Cu(dpp)(SO<sub>4</sub>)(H<sub>2</sub>O)<sub>2</sub>]}<sub>n</sub> (7), where acac<sup>−</sup> = acetylacetonate, ox<sup>2−</sup> = oxalate. Remarkably, the treatment of Cu(II) chloride dihydrate with dpp in methanol solution led to an unusual in situ condensation of dpp with acac<sup>−</sup> to produce [Cu<sub>2</sub>(acdpp)<sub>2</sub>(Cl)<sub>4</sub>]·2(MeOH) (8). The structure of 1 consists of neutral, mononuclear [Cu(acac)(dpp)(NO<sub>3</sub>)] units with acac<sup>−</sup> and dpp acting as bidentate ligands. In 2, the dpp ligand coordinates in a bis-chelating mode to two Cu(II) ions and bridges them into a dimeric entity, whereas an oxalate linker joins [Cu(Hdpp)(Cl)<sub>2</sub>(H<sub>2</sub>O)]<sup>+</sup> units into a dimer in 4. Compounds 3, 5, 6 and 7 are 1D chain coordination polymers, which incorporate two symmetry independent metal centers and different bridging ligands: Hdpp<sup>+</sup> as a protonated cationic or dpp as a neutral chelating ligand and oxalate, Cl<sup>−</sup> anions or sulfate di-anions as bridging ligands. Magnetic studies were performed on samples 1 and 2, and the analysis reveals a very weak magnetic exchange coupling mediated via the dpp ligand.</p></description> </descriptions> <formats> <format>uri</format> </formats> </resource>