Dibenzo[18]crown‐6 derivatives 1 with two lateral tetraalkyloxy o‐terphenyl units were prepared and converted to the corresponding complexes KX⋅1 (X=halide, BF4, PF6, SCN) and NH4PF6⋅1. Complexation was probed by MALDI‐TOF spectrometry and NMR spectroscopy. Downfield shifts of 1H NMR signals for complexes with soft anions Br, I, SCN, and PF6 indicated the presence of tight ion pairs, whereas complexes
Lead ion selective electrodes from dibenzo-18-crown-6 derivatives: An exploratory study
作者:Deneikah T. Jackson、Peter N. Nelson、Irvin N. Booysen
DOI:10.1016/j.molstruc.2020.129575
日期:2021.3
spectroscopies, Differential Pulse Anodic Stripping (DPASV), Cyclic (CV) and Square Wave (SWV) voltammetries, as possible materials for preparing plasticiser free lead(II) ionselectiveelectrodes. The spontaneous, entropy driven, interactions between lead(II) ions and DB18C6 derivatives are such that they form 1:1 complexes via coordination with the high electron density open ether cavity, except for the brominated
Synthesis of Crown Ether-Linked Discotic Triphenylenes
作者:Juanjuan Li、Zhiqun He、Hemant Gopee、Andrew N Cammidge
DOI:10.1021/ol902637z
日期:2010.2.5
triphenylene dimers linked by a central crownether core have been synthesized and characterized. The crownether is most conveniently formed as a final step to permit purification and isolation of ion-free material, and extension of the protocol permits synthesis of triad structures linked though a 27-crown-9 macrocycle. The latter compounds present a new discotic motif that supports mesophase formation.
Hydrogen Storage in a Potassium-Ion-Bound Metal-Organic Framework Incorporating Crown Ether Struts as Specific Cation Binding Sites
作者:Dae-Woon Lim、Seung An Chyun、Myunghyun Paik Suh
DOI:10.1002/anie.201404265
日期:2014.7.21
framework (MOF) for hydrogen storage, SNU‐200 incorporating a 18‐crown‐6 ether moiety as a specific binding site for selected cations has been synthesized. SNU‐200 binds K+, NH4+, and methyl viologen(MV2+) through single‐crystal to single‐crystal transformations. It exhibits characteristic gas‐sorption properties depending on the bound cation. SNU‐200 activated with supercritical CO2 shows a higher isosteric
Di-Benzo-18-Crown-6 and its Derivatives as Ligands in the Search for Ion Channels
作者:Katharina M. Fromm、Rémi D. Bergougnant、Adeline Y. Robin
DOI:10.1002/zaac.200500470
日期:2006.4
channel system [(H2O)⊂(DB18C6)(μ2-H2O)2/2][(H3O)⊂(DB18C6)(μ2-H2O)2/2]I3 (2), which is realized by stacking of crownethermolecules (DB18C6 = dibenzo-18-crown-6), other synthetic approaches towards ionic channels and their results are presented in this paper. The “cutting out” approach using DB18C6 as scissor, applied on NaI, yields the compound [Na⊂(DB18C6)I(THF)][Na⊂(DB18C6)(H2O)2]I(THF)2(CHI3) (1)