We herein present a new family of crown ether-based covalentorganicframeworks (CE-COFs) for the first time. The CE-COFs show excellent phase-transfer catalytic performance in various nucleophilic substitution reactions.
Catechol-Based Macrocyclic Rods: En Route to Redox-Active Molecular Switches
作者:Nicolas Weibel、Artem Mishchenko、Thomas Wandlowski、Markus Neuburger、Yann Leroux、Marcel Mayor
DOI:10.1002/ejoc.200900751
日期:2009.12
of the macrocyclic turnstile 1 comprising a terminally sulfur-functionalized molecularrod and a redox-active catechol subunit is described. The shape-persistent macrocyclic scaffold consists of alternating arylene and ethynylene units. A freely rotating 2,6-diethynyl-catechol subunit is clamped between both terminal arylene subunits as molecular turnstile. While the electrochemical switching between
描述了包含末端硫官能化分子棒和氧化还原活性儿茶酚亚基的大环旋转门 1 的设计和合成。形状持久的大环支架由交替的亚芳基和亚乙炔单元组成。一个自由旋转的 2,6-二乙炔-儿茶酚亚基被夹在两个末端亚芳基亚基之间作为分子旋转门。虽然儿茶酚和这种儿茶酚亚基的醌形式之间的电化学转换是通过循环伏安法显示的,但通过有利于和不利于分子内氢键形成的构象重排是当前研究的主题。末端乙酰基保护的硫锚定基团能够将大环固定在 Au 尖端和 STM 装置的 Au 底物之间。旋转门 1 的初步单分子传输研究显示出与母体分子棒相当的值。目前正在进行电化学控制的单分子传输实验,以研究氧化还原状态相关的传输特性。
Rigid-Strut-Containing Crown Ethers and [2]Catenanes for Incorporation into Metal-Organic Frameworks
crystallography, which revealed racemic R and S isomers with planar chirality present in the crystal in a 1:1 ratio. These crown ether based struts serve as excellent organic ligands to bind with transition metal ions in the construction of MOFs: the crown ethers BPP34C10DA and NPP36C10DA in the presence of Zn(NO3)2⋅4 H2O afforded the MOF‐1001 and MOF‐1002 frameworks, respectively. The crystal structures of
Interchromophore orientation scaffolding by m-terphenyl oxacyclophanes
作者:Anshuman Mangalum、Brad P. Morgan、Jessica M. Hanley、Kristine M. Jecen、Charles J. McGill、Grant A. Robertson、Rhett C. Smith
DOI:10.1039/c0cc00247j
日期:——
Modular oxacyclophanes featuring m-terphenyl units scaffold inter-π-system interaction in face-to-face stacked or orthogonal orientations, leading to distinct photophysical properties.
Bimetallic ruthenium complexes bridged by divinylphenylene bearing oligo(ethylene glycol)methylether: synthesis, (spectro)electrochemistry and the lithium cation effect
作者:Li Yan Tian、Yuan Mei Liu、Guang-Xuan Tian、Xiang Hua Wu、Zhen Li、Jun-Feng Kou、Ya-Ping Ou、Sheng Hua Liu、Wen-Fu Fu
DOI:10.1039/c3dt52677a
日期:——
A series of 1,4-disubstituted ruthenium–vinyl complexes, (E,E)-[(PMe3)3(CO)ClRu}2(μ-HCCH–Ar–CHCH)], in which the 1,4-diethenylphenylene bridge bears two oligo(ethylene glycol)methyl ether side chains at different positions (2,5- and 2,3-positions), were prepared. The respective products were characterized by elemental analyses and NMR spectroscopy. The structures of complexes 1b and 1e were established