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Supramolecular chains and coordination nanowires constructed of high-spin {Co^{II}}_{9}{W^V}_{6} clusters and 4,{4}'-bpdo linkers

Supramolecular chains and coordination nanowires ...

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dc.contributor.author Chorąży, Szymon [SAP14016208] pl
dc.contributor.author Podgajny, Robert [SAP11017878] pl
dc.contributor.author Nitek, Wojciech [SAP12014773] pl
dc.contributor.author Rams, Michał [SAP11016294] pl
dc.contributor.author Ohkoshi, Shin-ichi pl
dc.contributor.author Sieklucka, Barbara [SAP11009399] pl
dc.date.accessioned 2015-06-10T18:08:43Z
dc.date.available 2015-06-10T18:08:43Z
dc.date.issued 2013 pl
dc.identifier.issn 1528-7483 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/9292
dc.language eng pl
dc.rights Dodaję tylko opis bibliograficzny *
dc.rights.uri *
dc.title Supramolecular chains and coordination nanowires constructed of high-spin {Co^{II}}_{9}{W^V}_{6} clusters and 4,{4}'-bpdo linkers pl
dc.type JournalArticle pl
dc.description.physical 3036-3045 pl
dc.abstract.en Cyanido-bridged high-spin {Co^{II}[Co^{II}(MeOH)_{3}]_{8}[W^{V}(CN)_{8}]_{6}} (Co_{9}W_{6}) clusters revealing single-molecule magnet behavior were combined with 4,{4}'-bipyridine-N,N′-dioxide (4,{4}'-bpdo) linkers, giving unique H-bonded supramolecular {Co^{II}_{9}(MeOH)_{24}[W^{V}(CN)_{8}]_{6}}\cdot 4,{4}'-bpdo \cdot MeOH \cdot 2H_{2}O (1) chains and one-dimensional coordination {Co^{II}[Co^{II}(4,{4}'-bpdo)_{1.5}(MeOH)]_{8}[W^{V}(CN)_{8}]_{6}} \cdot 2H_{2}O (2) nanowires. The hydrogen-bonded chains of 1 are embedded within the three-dimensional supramolecular network stabilized by the series of noncovalent interactions between Co_{9}W_{6} clusters, 4,{4}'-bpdo, and solvent molecules. The coordination nanowires 2, revealing an average core diameter of about 11 \AA , are arranged parallel with the significant separation in the crystal structure, leading to a microporous supramolecular network with broad channels (12 × 12 \AA) filled by methanol and water. Both 1 and 2 are stable only in a mother solution or an organic protectant, whereas they undergo the fast exchange of methanol ligands to water molecules during drying in the air. Synthesized materials preserve the magnetic characteristics of Co_{9}W_{6} clusters with an effective ferromagnetic coupling, giving a ground-state spin of 15/2. For 2, the additional antiferromagnetic intercluster interactions are observed. Below 3 K, the frequency-dependent \chi _{M} (T) signals of 1 and 2 indicate the onset of slow magnetic relaxation. For 1, the relaxation time follows the Arrhenius law with an energy gap of \Delta / k_{B}= 10.3(5) K and \tau _{0}= 4(1) \times 10^{-9} s, which is consistent with single-molecule magnet behavior. pl
dc.description.volume 13 pl
dc.description.number 7 pl
dc.description.publication 1 pl
dc.identifier.doi 10.1021/cg400448x pl
dc.identifier.eissn 1528-7505 pl
dc.title.journal Crystal Growth & Design pl
dc.language.container eng pl
dc.affiliation Wydział Chemii : Zakład Chemii Nieorganicznej pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego pl
dc.affiliation Wydział Chemii : Zakład Krystalochemii i Krystalofizyki pl
dc.subtype Article pl
dc.rights.original bez licencji pl
.pointsMNiSW [2013 A]: 40

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