Magnetic properties and sensitized visible and NIR luminescence of DyIII and EuIII coordination polymers by energy transfer antenna ligands |
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| Authors: | Mustafa Burak Coban Cagdas Kocak Muhittin Aygun Asma Amjad |
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| Affiliation: | 1. Center of Science and Technology App. and Research, Balikesir University, Balikesir, Turkey;2. Department of Physics, Faculty of Science and Art, Balikesir University, Balikesir, Turkey;3. Department of Physics, Molecular Nano-Materials Laboratory, Faculty of Science, Mugla Sitki Kocman University, Mugla, Turkey;4. Dokuz Eylul Univ, Faculty of Arts &5. Sciences, Department of Physics, Izmir, Turkey;6. Dipartimento di Chimica “U. Schiff” and UdR INSTM, Università di Firenze, Sesto Fiorentino (FI), Italy |
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| Abstract: | Two coordination polymers, {[Ln(2-stp)(4,4′-bipy)(H2O)].(H2O)}, [Ln = Dy (1) and Eu (2), 2-stp = 2-sulfoterephthalate and 4,4′-bipy = 4,4′-bipyridine] have been characterized by solid state UV-vis, FTIR spectra, X-ray single crystal diffraction and solid state photoluminescence. Variable-temperature magnetic susceptibility and isothermal magnetization as function of external magnetic field is also studied for both complexes. After ligand-mediated excitation, both complexes show the characteristic visible and NIR luminescence of the corresponding LnIII ions (Ln = Dy, Eu) which is due to efficient energy transfer from the ligands to the central LnIII ions via an antenna effect. The indirect energy transfer in both complexes has been investigated and discussed in detail. |
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| Keywords: | Lanthanide hydrothermal synthesis photoluminescence, magnetism |
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