Journal article

Authors list: Youssef, H; Schäfer, T; Becker, J; Sedykh, AE; Basso, L; Pietzonka, C; Taydakov, IV; Kraus, F; Müller-Buschbaum, K

Publication year: 2022

Pages: 14673-14685

Journal: Dalton Transactions

Volume number: 51

Issue number: 38

ISSN: 1477-9226

eISSN: 1477-9234

DOI Link: https://doi.org/10.1039/d2dt01999j

Publisher: Royal Society of Chemistry

Abstract: 
A series of 15 lanthanide-containing coordination polymers, both 3D- and 2D-networks, as well as complexes of Ln-trichlorides with 3-(3-pyridyl)pyrazole (3-PyPzH), were synthesized. A large structural diversity is observed depending on the ligand content: 3(infinity)[Ln(3-PyPzH)Cl-3], Ln = Eu and Gd, of sra topology, 2(infinity)[Sm(3-PyPzH)Cl-3], 2(infinity)[Ln(2)(3-PyPzH)(3)Cl-6]center dot 2solv, Ln = Eu3+, Tb3+, Dy3+, Ho3+ and Er3+, solv = Tol and MeCN, of sql topology and 2(infinity)[Ln(3-PyPzH(2))Cl-4], Ln = La and Nd, of hcb topology with salt like complexes of the formula [(3-PyPzH(2))][Ln(3-PyPzH)(2)Cl-4], Ln = Eu, Tb, Dy and Ho. The products were characterized by single-crystal and powder X-ray diffraction, high-temperature X-ray diffraction, differential thermal analysis and thermogravimetry (DTA/TG) combined with mass spectrometry, differential scanning calorimetry (DSC), IR-spectroscopy, UV-visible spectrophotometry, photoluminescence spectroscopy, and magnetic susceptibility. Absorption spectroscopy shows ion-specific 4f-4f transitions that can be assigned to Sm3+, Eu3+, Dy3+, Ho3+ and Er3+ in a wide range from the UV-VIS to NIR region. An excellent antenna effect through ligand-metal energy transfer was observed in 2(infinity)[Tb-2(3-PyPzH)(3)Cl-6]center dot 2solv, leading to high efficiency of the luminescence indicated by a quantum yield up to 76%. Direct current magnetic susceptibility studies reveal the absence of interatomic interaction for Dy3+ and Er3+ and weak ferromagnetic interaction for Ho3+. Thermal analysis shows good stability up to 365 degrees C for 2(infinity)[Ho-2(3-PyPzH)(3)Cl-6]center dot 2MeCN.

Harvard Citation style: Youssef, H., Schäfer, T., Becker, J., Sedykh, A., Basso, L., Pietzonka, C., et al. (2022) 3D-Frameworks and 2D-networks of lanthanide coordination polymers with 3-pyridylpyrazole: photophysical and magnetic properties, Dalton Transactions, 51(38), pp. 14673-14685. https://doi.org/10.1039/d2dt01999j

APA Citation style: Youssef, H., Schäfer, T., Becker, J., Sedykh, A., Basso, L., Pietzonka, C., Taydakov, I., Kraus, F., & Müller-Buschbaum, K. (2022). 3D-Frameworks and 2D-networks of lanthanide coordination polymers with 3-pyridylpyrazole: photophysical and magnetic properties. Dalton Transactions. 51(38), 14673-14685. https://doi.org/10.1039/d2dt01999j