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Google Drive 77.0.3 instal the new1/19/2024 ![]() ![]() The utilization of heteronuclear cationic 15-metallacrown-5 complexes as initial building blocks has also led to porous structures that are able to absorb various guest molecules (Lim et al., 2010 ). In addition, a number of heteropolynuclear metallacrown complexes have been shown to possess single molecule magnetic (SMM) behaviour (Ostrowska et al., 2016 Wang et al., 2019 ), bright luminescence with high quantum yields (Nguyen et al., 2018 Martinić et al., 2017 ) and the ability to serve as building blocks for the generation of supramolecular assemblies and coordination polymers (Pavlishchuk et al., 2014, 2017 b ). The numerous studies of 3 d–4 f metallamacrocyclic complexes in the last few decades arise from their potentially interesting catalytic (Griffiths & Kostakis, 2018 ), luminescence (Jankolovits et al., 2011 Li et al., 2017 ) and magnetic properties (Dhers et al., 2016 Zangana et al., 2014 ). High-quality X-ray data obtained for 1– 3 have allowed a re-evaluation of the X-ray data solution proposed earlier for the EuCu 5 complex and suggest that the formula is actually ♳.5H 2O. The lattice parameters of complexes 1– 3 are similar to those previously reported for an Eu III–Cu II 15-metallacrown-5 complex with glycinehydroxamate of proposed composition ♳.5H 2O. The electroneutrality of complexes 1– 3 is achieved by a bidentate carbonate anion coordinated to the Ln III ion and a monodentate nitrate anion coordinated apically to one of the copper(II) ions of the metallamacrocycle. The Ln III ions are coordinated to the metallamacrocycle through five O-donor hydroxamates. Complexes 1– 3 contain five copper(II) ions and five bridging GlyHA 2− anions, forming a 5 metallamacrocyclic core. xH 2O (GlyHA 2− is glycinehydroxamate, N-hydroxyglycinamidate or aminoacetohydroxamate, C 2H 4N 2O 2 2−), with lanthanide(III) ( Ln III) = gadolinium (Gd, 1, x = 3.5), dysprosium (Dy, 2, x = 3.28) and holmium (Ho, 3, x = 3.445), within a 15-metallacrown-5 class were obtained on reaction of lanthanide(III) nitrate, copper(II) acetate and sodium glycinehydroxamate. ![]() ![]() Three new isotypic heteropolynuclear complexes, namely pentaaquacarbonatopentakis(glycinehydroxamato)nitratopentacopper(II)lanthanide(III) x-hydrate, ![]()
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