Temperature-dependent self-assembly of near-infrared (NIR) luminescent Zn2Ln and Zn2Ln3 (Ln = Nd, Yb or Er) complexes from the flexible Salen-type Schiff-base ligand

Synthesis and the luminescent properties of the Nd3+ ions doped three kinds of fluoride nanocrystals in organic solvents

“…One method is Neodymium oxide or chloride dispersing in the inorganic liquid just like SeOCl 2 and POCl 3 [4,5], but this solution has very strong toxicity and corrosivity, and this property limits its application severely. Another method is Nd 3+ -doped organic polydentate cage complexes dispersing in the organic solvent [7]. The organic solvent is safer than the inorganic ones, but the CAH and OAH bands from the organic solvent and ligands can quench the luminescence of the Nd 3+ ions easily, so the lifetime of this kind of material usually is very short and the quantum efficiency is very low [7].…”

“…Another method is Nd 3+ -doped organic polydentate cage complexes dispersing in the organic solvent [7]. The organic solvent is safer than the inorganic ones, but the CAH and OAH bands from the organic solvent and ligands can quench the luminescence of the Nd 3+ ions easily, so the lifetime of this kind of material usually is very short and the quantum efficiency is very low [7]. Over the past few years, more and more rare-earth doped nanocrystals (NCs) are emerging with very promising properties for amplification and laser emission in active integrated optical devices [8][9][10].…”

On the Structural Features of Substituted Lanthanide Benzoates

“…Among the mostly reported are NO 2 group, that dramatically quenches luminescence,, , and N 3 group was recently reported to be equally effective quencher . OH‐ and NH 2 groups are also known to quench lanthanide‐based luminescence …”

Alternating copolymerization of CHO and MA catalyzed by the hetero-bimetallic Zn-Yb-Salen complex

“…As to the Yb 3+ (Yb1) ion, it is eight-coordinate and gives a square anti-prismatic pattern, where besides four O atoms from the outer O 2 O 2 moiety of the ligand (L) 2− , another four O atoms (O7, O8, O9 and O11) are contributed from the bidentate μ 2 -OAc − anion, another mono-dentate μ 1 -OAc − anion and one coordinated H 2 O molecule, respectively. It is worth noting that the OAc − -induced hetero-bimetallic host structure in 1⋅MeOH is incomparable with Cl − -dependent Zn 2 Ln [14] or NO 3 − -dependent Zn 2 Ln 2 [15], OAc − and NO 3 − -dependent ZnLn [16], Cl − and N 3 − -dependent Zn 2 Ln and Zn 2 Ln 3 frameworks [17] due to actual anion-controlling. Moreover, lanthanide contraction from Nd 3+ to Yb 3+ ion renders a shorter Zn 2+ ⋯ Yb 3+ separation 3.4590(6) Å in 1 ⋅ MeOH, from which the OAc − bridging between them is damaged for the formation of ZnYb while not Zn 2 Nd unit [18].…”