Occurrence of polyoxouranium motifs in uranyl organic networks constructed by using silicon-centered carboxylate linkers: structures, spectroscopy and computation

Abstract

Four polyoxouranium-based uranyl carboxylates have been synthesized based on silicon-centered carboxylate linkers. Oligomerization of the uranyl units from tetrameric unit, to octameric motif and ultimately infinite polyoxouranium chain was observed.

UoC-3: A Metal–Organic Framework with an Anionic Framework Based on Uranyl UO22+ Nodes and Partly Fluorinated Benzene-1,3,5-Tribenzoate Linkers

“…However, the crystallinity of this compound was too low to elucidate its crystal structure. UoC-3 is another example of uranium-based MOFs, which have attained a lot of attention in the recent past. ,,− …”

Regulating the Porosity of Uranyl Phosphonate Frameworks with Quaternary Ammonium: Structure, Characterization, and Fluorescent Temperature Sensors

“…Metal–organic frameworks (MOFs) based on coordination chemistry with more porous structures are featured by designability, making the structures and functions integrated into an extreme periodic lattice matrix at an atomic-level scale and providing more space for material design. , Both inorganic building units and organic ligands can be tailored by choosing proper metal ions and organic groups to create novel compounds for various applications, such as sensors, proton conductors, , molecular separation, − or heterogeneous catalysts. , Uranium-based MOFs (UMOFs) stand out among many actinides as the most studied ones due to their excellent optical properties. , As one of the essential elements for nuclear science and technology, uranium plays a crucial role in the nuclear fuel cycle process. Therefore, understanding uranium’s physical and chemical properties are fundamental to reducing radioactive waste and raising the level of the chemical process to make nuclear energy safer, more efficient, and sustainable .…”

Enhanced luminescence of tris(carboxylato)uranyl(vi) complexes and energy transfer to Eu(iii): a combined spectroscopic and theoretical investigation

“…[10][11][12] This green luminescence which generally appears from the lowest excited state (O yl → U LMCT states) displays five to eight finger vibronic peaks in the visible range (∼450-600 nm) and is well known since the pioneering work of Henri Becquerel. [13][14][15] A variation in the emission/absorption spectral pattern or intensity assists in providing the relevant information about the symmetry and coordination modes of uranyl with its surrounding environment. [16][17][18][19] Luminescence spectroscopy is often preferred over absorption spectroscopy to characterize uranyl complexes as the former is more sensitive and informative.…”