Synthesis, crystal structure and luminescent properties of new lanthanide-containing coordination polymers involving 4,4′-oxy-bis-benzoate as ligand

Abstract

Synthesis, crystal structure and luminescent properties of new lanthanide-containing coordination polymers involving 4,49-oxy-bis-benzoate as ligand3

Photoluminescent Metal–Organic Frameworks – Rapid Preparation, Catalytic Activity, and Framework Relationships

“…An inspection of the literature for photoluminescent coordination polymers based on lanthanide centers, in particular, the recent work by Daiguebonne and collaborators on benzene‐polycarboxylate ligands,40 further supports that the properties of the compounds herein described are unusual among related materials. Studies on lanthanide coordination polymers based on terephthalate (bdc 2– ) or 4,4′‐oxybis(benzoic acid) (oba) ligands show interesting luminescent quantum yields and lifetimes of 72 % and 0.85 ms for [Tb 2 (oba) 3 (H 2 O) 6 · 3H 2 O]40d and 20 % and 0.41 ms for [Eu 6 O(OH) 8 (NO 3 ) 2 (bdc)(Hbdc) 2 · 2NO 3 · H 2 bdc] 40c. The main breakthrough from the Daiguebonne group arises from heteronuclear lanthanide‐based coordination polymers, in particular [{Y 6 x Tb 6–6 x } 6 O(OH) 8 (NO 3 ) 2 (bdc)(Hbdc) 2 · 2NO 3 · H 2 bdc] 40c.…”

Color and Brightness Tuning in Heteronuclear Lanthanide Terephthalate Coordination Polymers

“…[42] In the present case, the mean volume is roughly ν = 298 Å 3 per metallic ion. This corresponds to the volume of a sphere with a ra- plane and that lie more than 10 Å apart from each other (see Figure 4).…”

“…What is more surprising is that the Tbcontaining compound emits very intensively (140 Cd m -2 ) compared with compounds that exhibit higher luminescence quantum yields. [42] This discrepancy between the luminescence quantum yield and the luminescence intensity can be related to the absorption ability of the compounds. Actually, the luminescence quantum yield is a reflection of the ratio of the number of absorbed photons to the number of emitted photons.…”

High Brightness and Easy Color Modulation in Lanthanide-Based Coordination Polymers with 5-Methoxyisophthalate as Ligand: Toward Emission Colors Additive Strategy

“…[24] However, ladder-like molecular motifs stack in such a way that the shortest intermetallic contacts between lanthanide ions that belong to neighboring motifs are only 6 Å (See scheme 4). With the rough model that has been described previously, [53] the mean volume occupied by an Y 3+ ion in this crystal structure is v ത = 464 Å 3 , that is, the mean distance between two lanthanide ions is about 9.6 Å (r = ට ଷ୴ ഥ…”