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《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2017,129(30):8975-8980
The interaction between two AgII porphyrins, connected covalently through a highly flexible ethane bridge, in a metalloporphyrin dimer has been investigated upon stepwise oxidation. X‐ray structure determination of one and two‐electron oxidized complexes has clearly revealed only metal‐centered oxidation that results in short Ag−N (porphyrin) distance with large distortion in the porphyrin macrocycle. The 2e‐oxidized complex exhibits significant metallophilic interaction in the form of a close AgIII⋅⋅⋅AgIII contact that brings two porphyrin rings more cofacial with syn ‐conformation, which would otherwise stabilize in an anti ‐form. The interaction also leads to an intense emission peak at 546 nm at 77 K in the photoluminescence study. 相似文献
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Seung‐Kyun Noh Jeong Heum Jeon Won Jun Jang Dr. Howon Kim Soon‐Hyeong Lee Min Wook Lee Prof. Jhinhwan Lee Prof. Seungwu Han Prof. Se‐Jong Kahng 《Chemphyschem》2013,14(6):1177-1181
The role of halogen bonds in self‐assembled networks for systems with Br and I ligands has recently been studied with scanning tunneling microscopy (STM), which provides physical insight at the atomic scale. Here, we study the supramolecular interactions of 1,5‐dichloroanthraquinone molecules on Au(111), including Cl ligands, by using STM. Two different molecular structures of chevron and square networks are observed, and their molecular models are proposed. Both molecular structures are stabilized by intermolecular Cl???H and O???H hydrogen bonds with marginal contributions from Cl‐related halogen bonds, as revealed by density functional theory calculations. Our study shows that, in contrast to Br‐ and I‐related halogen bonds, Cl‐related halogen bonds weakly contribute to the molecular structure due to a modest positive potential (σ hole) of the Cl ligands. 相似文献
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Elke Duchardt‐Ferner Jan Ferner Jens Whnert 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2011,123(34):8073-8076
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