Luminescent sensor materials based on rare-earth element complexes for detecting cations, anions, and small molecules

Synthesis, Structure and Magnetic Properties of Low-Dimensional Copper(II) trans-1,4-cyclohexanedicarboxylate

“…Metal-organic coordination polymers (MOCPs) have attracted significant research attention due to their broad structural design [1][2][3] and targeted modulation of properties that is possible by varying functional metal centers [4], organic ligands [5], and guest substrates [6]. Polynuclear and polymeric blocks consisting of unpaired electron-rich metal ions can present valuable magnetic properties (such as ferro- [7], antiferro- [8], and ferrimagnets [9], as well as slow magnetic relaxation [10,11]), complex luminescence patterns [12,13], redox behavior [14], and unique chemical bonding features [15].…”

Coordination Compounds of Lanthanides as Materials for Luminescent Turn Off Sensors

“…These compounds are often characterized by switchable and tunable properties allowing fine-tuned optical features and sensitive responses to small molecules and ions. Several reviews [7][8][9][10][11][12] have reported lanthanide-containing luminescent sensor materials, which can be used for detecting anions [9] or low molecular weight analytes [8], and also for detecting cations [12]. The rapid growth in the number of publications requires a systematization that could help in the choice of the right compounds for new devices.…”

Self-Assembly of a Two-Dimensional Coordination Polymer Based on Silver and Lanthanide Tetrakis-Acylpyrazolonates: An Efficient New Strategy for Suppressing Ligand-to-Metal Charge Transfer Quenching of Europium Luminescence

“…The directed synthesis of CPs based on the Ln 3+ ions is complicated by high and variable values of coordination numbers, as well as the absence of preferred polyhedra for 4f -elements [ 6 , 7 ]. At the same time, the luminescent properties of lanthanide complexes, due to the unique features of the electronic configuration, find application in the creation of various materials for light-emitting devices (LEDs) [ 8 , 9 , 10 , 11 ], biological luminescent labels [ 12 , 13 , 14 ], in thermometry [ 15 , 16 , 17 ] and in chemical sensors [ 18 , 19 , 20 , 21 , 22 , 23 ].…”

“…Among the anionic ligands, the most effective luminescence sensitizers, β-diketones stand out, which, nevertheless, usually form mononuclear complexes [Ln(β-diketone) 3 (L) 1–2 ] or molecular anions [Ln(β-diketone) 4 ] − , which are soluble in typical organic solvents and have moderate chemical stability [ 27 ]. The monomeric nature of most studied Ln 3+ diketonates can complicate functional applications in a number of problems, for example, in the creation of sensor materials [ 22 , 23 ]. To create oligomeric and polymeric lanthanide coordination compounds, it is necessary to use polydentate ligands, such as carbocyclic [ 28 ] and heterocyclic [ 5 ] aromatic carboxylic acids, which often have absorption maxima with λ < 300 nm and have low absorption in the near UV region (300–400 nm).…”