2D polymeric lanthanide(III) compounds based on novel bright green emitting enaminone ligand

Ln‐MOF‐Based Hydrogel Films with Tunable Luminescence and Afterglow Behavior for Visual Detection of Ofloxacin and Anti‐Counterfeiting Applications

“…Therefore, the luminescence yield of NIIC‐2‐Tb is much higher than that of NIIC‐2‐Eu. The luminescence decay followed a monoexponential law (Figure 1j) with the excited state lifetimes of 0.86 and 0.32 ms, for NIIC‐2‐Tb and NIIC‐2‐Eu, typical for Ln‐MOFs [ 50–52 ] and indicative of the ligand‐sensitized intrametal f–f transition emission mechanism. [ 53–55 ] As shown in the insets of Figure 1i, NIIC‐2‐Tb and NIIC‐2‐Eu emitted intense bright green and red light, respectively, under the UV lamp at 295 nm, which is consistent with the colors indicated by the CIE coordinates (NIIC‐2‐Tb: (0.34, 0.57), NIIC‐2‐Eu: (0.66, 0.34), Figure 1k).…”

Variable Dimensionality of Europium(III) and Terbium(III) Coordination Compounds with a Flexible Hexacarboxylate Ligand

“…In this work, we explore the coordination chemistry of an ether-bridged hexa-carboxylate ligand, 4,4',4"-(benzene-1,3,5-triyltris(oxy))triphthalic acid (H 6 L, Scheme 1), for which no coordination compounds have been reported before, although the compound itself was first prepared two decades ago and used for the synthesis of hyperbranched organic polymers [19]. Two lanthanide metals, europium(III) and terbium(III), were chosen as the central ions for the synthesis of coordination compounds because of their potential luminescent properties [20][21][22][23][24][25][26][27], possible applications as catalytic platforms [28,29], proton-conductive or magnetic materials [30]. In addition, flexible polycarboxylate ligands are especially suitable for the formation of lanthanide coordination polymers because of their ability to form strong metal-oxygen bonds and saturate the high lanthanide coordination numbers [31,32].…”