This paper reviews the state of the art in the structural chemistry of organically templated uranyl sulfates and selenates, which are considered as the most representative groups of U-bearing synthetic compounds. In total, there are 194 compounds known for both groups, the crystal structures of which include 84 various organic molecules. Structural studies and topological analysis clearly indicate complex crystal chemical limitations in terms of the isomorphic substitution implementation, since the existence of isotypic phases has to date been confirmed only for 24 compounds out of 194, which is slightly above 12%. The structural architecture of the entire compound depends on the combination of the organic and oxyanion parts, changes in which are sometimes realized even while maintaining the topology of the U-bearing complex. An increase in the size of the hydrocarbon part and number of charge functional groups of the organic cation leads to the formation of rare and more complex topologies. In addition, the crystal structures of two novel uranyl sulfates and one uranyl selenate, templated by isopropylammonium cations, are reported.

Two series of Au(III) pincer complexes [(C^N^C)AuL]ⁿ⁺ (C^N^C = 2,6-diphenylpyridine, L = alkynyl, n = 0; L = isocyanide, n = 1) have been synthesized and characterized in solution by NMR spectroscopy and mass spectrometry. The solid-state structures of alkynyl complexes were also analyzed with XRD crystallography. In a dilute CH₂Cl₂ solution, both alkynyl and isocyanide complexes display a similar weak blue phosphorescence originating from a metal-perturbed ³ILCT state localized on the pincer ligand, but their solid-state emission characteristics differ significantly. The isocyanide complexes exhibit strong bathochromic shifts of emission band maxima compared to those observed in solution, which can be assigned to the formation of aggregates that afford excimers with short Au-Au contacts in the T₁ emissive state. Among the neutral alkynyl analogues, two compounds retain essentially solution-like emissions, since their rigid crystalline environment precludes the excited-state transformation required for metal–metal bonding. Only the electron-rich dimethylamino derivative, which crystallizes as loosely packed dimers, exhibits a red-shifted solid-state band, and even this shift is substantially smaller than that of its isocyanide congener. The electronic structure of the complexes has been analyzed using DFT calculations, which corroborate the proposed rationalization of the observed trends in the emission characteristics and the difference in the aggregation behavior between the alkynyl and isocyanide chromophores.