Magnetic properties and sensitized visible and NIR luminescence of DyIII and EuIII coordination polymers by energy transfer antenna ligands

0000-0002-2032-8930 WOS: 000404578800016 Two coordination polymers, {[Ln(2-stp)(4,4 '-bipy)(H2O)]center dot(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 Ln(III) ions (Ln = Dy, Eu) which is due to efficient energy transfer from the ligands to the central Ln(III) ions via an antenna effect. The indirect energy transfer in both complexes has been investigated and discussed in detail. Research Funds of Balikesir UniversityBalikesir University [BAP-2015/128]; Mugla Sitki Kocman UniversityMugla Sitki Kocman University [BAP-2017/035] The authors are grateful to the Research Funds of Balikesir University (BAP-2015/128) and Mugla Sitki Kocman University (BAP-2017/035) for the financial support.