Assembly of a helical zinc(II) chain and a two-dimensional cadmium(II) coordination polymer using picolinate and sulfate anions as bridging ligands
Φόρτωση...
Ημερομηνία
Συγγραφείς
Papatriantafyllopoulou, C.
Raptopoulou, C. P.
Terzis, A.
Janssens, J. F.
Manessi-Zoupa, E.
Perlepes, S. P.
Plakatouras, J. C.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Elsevier
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Polyhedron
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
The initial use of the picolinate (pic(-))/sulfate "blend" in metal chemistry has yielded two neutral coordination polymers. Complexes [Zn-2(SO4)(pic)(2)(H2O)(3)](n) (1) and [Cd-2(SO4)(pic)(2)(H2O)(3)](n) center dot nH(2)O (2 center dot nH(2)O) were prepared by the reaction of MSO4 center dot xH(2)O [M = Zn, x = 7; M = Cd, x = 8/3] with one equivalent of picolinic acid (picH) in aqueous solution in the absence of external base. The structures of both compounds have been determined by single-crystal X-ray crystallography. Complex I consists of helical chains which interact through hydrogen bonds and stacking interactions to form a 3D, 5-connected network. Complex 2 - nH(2)O consists of ribbons that are crosslinked by the sulfato ligands to give a 2D, 4-connected network. Hydrogen bonds and stacking interactions lead to the formation of a 3D supramolecular architecture. In both coordination complexes, the pic ligand adopts two different bridging coordination modes (2.111 and 2.201 in 1; 2.211 and 2.201 in 2 center dot nH(2)O), while the SO42- behaves as a bidentate bridging 2.1100 (Harris notation) ligand. The Zn(II) complex has 5- and 6-coordinate metal ions, whereas 6- and 7-coordinate Cd-11 atoms are present in 2 - nH(2)O. Characteristic vibrational (IR, Raman) bands are discussed in terms of the known structures, and the coordination modes of the pic(-) and SO42- ligands. The thermal decomposition of the Cd(11) compound has also been studied. (C) 2007 Elsevier Ltd. All rights reserved.
Περιγραφή
Λέξεις-κλειδιά
cadmium(ii) sulfato complexes, coordination polymers, crystal structures, metal picolinate complexes, vibrational spectroscopy, zinc(ii) sulfato complexes, 3d-metal cluster chemistry, crystal-structure, magnetic-properties, structural characterization, spectroscopic characterization, succinamate(-1) ligand, carboxylate chemistry, stacking interactions, organic framework, metal-complexes
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000249905900004
http://ac.els-cdn.com/S0277538707002793/1-s2.0-S0277538707002793-main.pdf?_tid=ab1c4f4fcfa9f39620467fe271c913a1&acdnat=1333035997_1108225b705083fce6c4e0f67e96ffa6
http://ac.els-cdn.com/S0277538707002793/1-s2.0-S0277538707002793-main.pdf?_tid=ab1c4f4fcfa9f39620467fe271c913a1&acdnat=1333035997_1108225b705083fce6c4e0f67e96ffa6
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας