- Entangled Uranyl Organic Frameworks with (10,3)-b Topology and Polythreading Network: Structure, Luminescence, and Computational Investigation
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Two 3D uranyl organic frameworks (UOFs) with entangled structures, (HPhen)2[(UO2)2L2]·4.5H2O (1) and [(UO2)3(H2O)4L2]·6H2O (2), were synthesized using a rigid tripodal linker (4,4′,4″-(phenylsilanetriyl)tribenzoic acid, H3L). Compound 1 represents a 2-fold interpenetrating UOF with the unique (10,3)-b topology. Compound 2 is composed of three interlocked sets of identical singlet networks and thus exhibits a rare 3D polythreading network with (3,4)-connected topology. These two compounds have been characterized by IR, UV-vis, and photoluminescent spectroscopy. A density functional theory (DFT) study on the model compounds of 1 and 2 shows good agreement of structural parameters and U=O stretching vibrational frequencies with experimental data. The experimentally measured absorption bands were well reproduced by the time-dependent DFT calculations.
- Liu, Chao,Gao, Chao-Ying,Yang, Weiting,Chen, Fang-Yuan,Pan, Qing-Jiang,Li, Jiyang,Sun, Zhong-Ming
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- Ueber Tetraaryl-Methan-Analoga in der Gruppe 14. II. Ph4-nSi-p-Toln und Ph4-nSn-p-Toln (n = 0 bis 4): Einfluss der p-Tolyl-Substituenten auf Struktur und NMR-chemische Verschiebungen
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The title compounds have been synthesized by Li and Grignard reactions.The crystal structure of Ph3Si-p-Tol has been determined.The substitution of only one phenyl by one p-tolyl group causes only a slight deviation from the ideal S4 symmetry of Ph4Si.Gra
- Charisse, Michael,Gauthey, Valerie,Draeger, Martin
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