Self-assembled two-dimensional salicylaldimine lanthanum(III) nitrate coordination polymer |
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Authors: | Wanda Radecka-Paryzek Izabela Pospieszna-Markiewicz Maciej Kubicki |
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Institution: | Faculty of Chemistry, Adam Mickiewicz University, 60-780 Poznań, Poland |
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Abstract: | The unprecedented self-assembled formation of a two-dimensional salicylaldimine lanthanum coordination polymer is proved by the X-ray diffraction analysis of new lanthanum(III) nitrate complex containing the N,N′-bis(salicylidene)-1,4-butanediamine ligand L, which was prepared in situ through one-step template 2+1] Schiff base condensation of salicylaldehyde with 1,4-butanediamine in the presence of lanthanum(III) nitrate ion and characterized by spectroscopic (IR, ESI-MS, UV-Vis, and 1H NMR) data and microanalysis. The complex displays an infinite La2L4(NO3)6]∞ polymeric structure based on networks of ten-coordinated La(III) nodes linked by bridging L ligands. The coordination geometry around the lanthanum is a distorted bicapped dodecahedron. This polymer can be described as composed from the columns of dimers connected into chains, via the flexible chain parts of ligands. |
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Keywords: | Coordination polymer Self-assembly Lanthanum O-salen-type ligand X-ray crystal structure |
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