Bimetallic Uranyl Organic Frameworks Supported by Transition-Metal-Ion-Based Metalloligand Motifs: Synthesis, Structure Diversity, and Luminescence Properties

Abstract

A bifunctional ligand, 2,2'-bipyridine-4,4'-dicarboxylic acid (Hbpdc), has been used in the investigation of constructing bimetallic uranyl organic frameworks (UOFs). Seven novel uranyl-transition metal bimetallic coordination polymers, [(UO)Zn(bpdc)] (1), [Cd(UO)(bpdc)(HO)·2HO] (2), [Cu(UO)(bpdc)(SO)(HO)·2HO] (3), [CuCl(UO)(bpdc)(Hbpdc)(HO)·HO] (4), [Cu(UO)(bpdc)(HO)] (5), [Co(UO)(bpdc)] (6), and [Co(UO)(bpdc)(Hbpdc)(HO)] (7), have been successfully constructed through the assembly of various transition-metal salts, uranyl ions, and Hbpdc ligands under hydrothermal conditions. UOFs 1, 5, 6, and 7 adopt three-dimensional (3D) frameworks with different architectures; UOFs 2 and 3 exhibit two-dimensional (2D) wavelike and stairlike layers, respectively, while UOF 4 is a one-dimensional (1D) chain assembly. These UOFs include a wide range of dimensionalities (1D-3D), interpenetrated frameworks, and cation-cation interaction species, suggesting that anion-dependent structure regulation based on the metalloligand [M(bpdc) ] motifs, the coordination modes of the metal centers and bpdc ligands, along with the reaction temperature, has a remarkable influence on the formation of bimetallic UOFs, which could be a representative system for the structural modulation of UOFs with various dimensionalities and structures. Furthermore, the thermal stability and luminescent properties of compounds 1, 3, and 6 are also investigated.

A Water‐Stable Uranyl Organic Framework as a Highly Selective and Sensitive Bifunctional Luminescent Probe for Fe3+ and Tetracycline Hydrochloride

“…As shown in Figure , there were five specific uranyl peaks at 464 nm, 484 nm, 503 nm, 526 nm, and 552 nm. These characteristic peaks were consistent with the S 11 →S 00 and S 10 →S 0ν ( ν =0–4) electron vibration conversion process . The position of the strongest peak was at 484 nm, and the emission peak of compound 1 has a blue shift of 24 nm compared with UO 2 (NO 3 ) 2 ⋅6 H 2 O.…”

“…These characteristicp eaks were consistent with the S 11 !S 00 and S 10 !S 0n (n = 0-4) electron vibration conversion process. [35][36][37] The position of the strongest peak was at 484 nm, and the emission peak of compound 1 has ab lue shift of 24 nm compared with UO 2 (NO 3 ) 2 ·6 H 2 O. The blue shifto ft he compound 1 may be caused by the coordination environment of the uranyl and the free protonated 4,4'-bipyridine molecules.…”

The Effect of Guest Metal Ions on the Reduction Potentials of Uranium(VI) Complexes: Experimental and Theoretical Investigations

“…[21][22][23][24][25][26][27] The studies of these properties of uranium are helpful for waste managementi nn uclear reactors to prevent water and soil pollution.Uranium forms stable com-plexes with multidentate organic ligands, af act that is exploited in the detection and separation of uranium from nuclear slag, ground water,a nd seawater. [21][22][23][24][25][26][27] The studies of these properties of uranium are helpful for waste managementi nn uclear reactors to prevent water and soil pollution.Uranium forms stable com-plexes with multidentate organic ligands, af act that is exploited in the detection and separation of uranium from nuclear slag, ground water,a nd seawater.…”

“…The interest in coordinationcomplexes of uranium in current researchi sg rowing as ar esult of their significant photoluminescent, photocatalytic, electrochemical, optical, and molecular magnetic properties. [21][22][23][24][25][26][27] The studies of these properties of uranium are helpful for waste managementi nn uclear reactors to prevent water and soil pollution.Uranium forms stable com-plexes with multidentate organic ligands, af act that is exploited in the detection and separation of uranium from nuclear slag, ground water,a nd seawater. [28][29][30][31] It shows multiple oxidation states, varying from + III to + VI;h owever,i na erobic conditions the commono xidation state is + VI, which is stabilized as the uranyl dication (UO 2 2 + ).…”

Isomerism in Benzenetricarboxylates: Variations in the Formation of Coordination Polymers with Uranyl Ion

“…uranyl-based coordination polymer, several such compounds having been reported recently. 2,19,[61][62][63][64][65][66][67] More generally, the utp topology accounts for about 1.2% of interpenetrating triperiodic structures, according to a survey of the cases published before 2009, 68 and it is much less frequent than the dia and pcu topologies; in contrast, class II interpenetration (i.e. in which the different nets are related by space group symmetry elements, not translations) is common, accounting for about one third of the cases.…”