Optical properties of thallium(I), lead(II) and bismuth(III) hexafluoroacetylacetonates. Intraligand phosphorescence under ambient conditions

Synthesis and characterization of two novel coordination polymers based on the rigid 1H-1,2,3-triazole-4,5-dicarboxylic acid ligand

“…This is consistent with the general idea that the appearance of room-temperature phosphorescence requires the presence of a heavy metal ion [27]. The heavy-atom effect of Pb(II) increases spin-orbit coupling and facilitates intersystem crossing, so the IL phosphorescence is sufficiently fast to compete successfully with radiationless deactivations [28,29]. The room-temperature solid-state phosphorescence lifetime of the sample was determined to be 906.7 s, which clearly supports this conclusion.…”

Synthesis, Crystal Structures, and Photophysical Properties of Two Novel Lead(II)–SIP Coordination Polymers (NaH2SIP = 5‐Sulfoisophthalic Acid Monosodium Salt) Containing Tetranuclear Lead(II) Units

“…[21] As described above, we can conclude that the different emission spectra of 1 and 2 can be significantly influenced by their crystal structures.…”

“…[18][19][20][21] On the other hand, the SIP ligand, with three functional groups, exhibits multiple coordinating modes facilitating the formation of multi-dimensional structures and diversified topologies. [22][23][24] Recently, we have reported a series of lanthanide-SIP coordination polymers wherein SIP proves to be a sensitive probe in examining the role of the lanthanide contraction effect in crystal structure formation.…”

Er3+ and Eu3+ complexes with heptafluoroacetylacetone and tris(pentafluoro)phenylphosphine oxide: The role of the pentafluorophenyl group on the coordination geometry and on the electronic absorption spectra

“…The electronic absorption spectra of Er 3+ complexes 1 and 3 show a broad band at 332 and 338 nm, respectively, with a shoulder at 350 nm typical of the absorption electronic spectra of other related hexafluoroacetylacetonate complexes and assigned to the lowest energy spin-allowed p-p ⁄ intraligand transition of the coordinated acetylacetonate (acac) ligand [22][23][24]. Surprisingly its intensity is much higher for the complex 1 with the tris(pentafluorophenyl)phosphine oxide ligand than for the homologous complex 3 with the triphenylphosphine oxide ligand.…”