Abstract
A series of silver(I) complexes of the general composition {[Ag(μ 2 -RBap)]·yH2O} n (y = 0 or 0.5), involving the deprotonated forms of the 6-(benzylamino)purine derivatives (RBap), was prepared. The compounds were characterized by elemental analysis (C, H, N), Raman and FT-IR spectroscopy, TG/DTA thermal analyses, and X-ray powder diffraction. On the basis of the fact that we were not able to prepare single crystals suitable for X-ray analysis, although many attempts at different conditions were made, DFT calculations were used for the prediction of structural properties of the complexes. The calculations implied a bridging coordination of the RBap ligands to Ag(I) via the N1 and N9 atoms of the purine moieties and thus the formation of 1D polymeric chain structure involving the Ag(N1)(N9) donor set. The products of thermal decomposition of selected complexes were characterized by scanning electron microscopy combined with energy-dispersive X-ray spectroscopy, and they were determined as silver aggregates with the average size of ~10 μm.
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Acknowledgments
This research was supported by Palacký University (PrF_2012_009 and PrF_2013_015) and the Operational Program Research and Development for Innovations - European Regional Development Fund (CZ.1.05/2.1.00/03.0058). The authors wish to thank Dr. Radka Křikavová for FT-IR and Raman spectra measurements, Dr. Pavel Štarha for TG/DTA experiments, Dr. Dalibor Jančík for SEM and EDX experiments, and Dr. Jan Filip for powder XRD experiments.
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706_2013_1078_MOESM1_ESM.doc
Supplementary material 1 (DOC 3364 kb) Structural formulas of the ligands used (Scheme S1), results of elemental analysis, FT-IR and FT-Raman spectroscopy of free ligands as well as their Ag(I) complexes (Figs. S1–S4), EDX spectra of silver particles (Fig. S5), X-ray crystal data for 4ClHBap(Tables S1–S3, Fig. S6), X-ray powder diffraction data for complexes 3, 5, and 6 (Table S4, Fig. S7), and Cartesian coordinates of optimized [Ag(μ 2 -4MeBap)]4 tetramers
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Šilha, T., Čajan, M. & Trávníček, Z. Investigation of Ag(I) complexes involving 6-(benzylamino)purine derivatives. Monatsh Chem 144, 1797–1806 (2013). https://doi.org/10.1007/s00706-013-1078-4
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DOI: https://doi.org/10.1007/s00706-013-1078-4