A Eu/Tb mixed lanthanide coordination polymer with rare 2D thick layers: Synthesis, characterization and ratiometric temperature sensing

Publication date: March 2018 Source:Journal of Solid State Chemistry, Volume 259 Author(s): Yuanyuan Zhu, Tifeng Xia, Qi Zhang, Yuanjing Cui, Yu Yang, Guodong Qian A series of lanthanide coordination polymers LnBTPTA (Ln = Eu, Tb, EuxTb1−x), was synthesized using a tricarbocylic ligand 4,4′,4′′-(benzene-1,3,5-triyltris(1H-pyrazole-3,1-diyl))tribenzoic acid (H3BTPTA). X-ray single crystal analyses reveal that the asymmetric unit cell contains seven crystallographically independent metal ions and seven crystallographically independent ligands which is quite unusual. The 3D framework is comprised of 2D thick layers stacked through van der Waals force, π-π interactions and hydrogen bonding interactions. Eu0.0316Tb0.9684BTPTA presents a dual-emission of Tb3+ at 543nm and Eu3+ at 617nm, and the intensity ratio shows an excellent linear relationship with the temperature changing in 25–225K. The relative sensitivity 0.45–5.12%K−1 is much higher than those have been reported in the same detection range. Graphical abstract

Source: Journal of Solid State Chemistry - February 3, 2018 Category: Chemistry Source Type: research