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
Rigid struts containing crown ether units (benzo-12-crown-4 and benzo-15-crown-5) coordinate with Zn4O(CO2)6 clusters, affording two different interpenetrated metal–organicframeworks (MOFs), i.e., benzo-12-crown-4-based MOF presents a “close contact” interpenetration mode, while the benzo-15-crown-5-based one has a “body center” interpenetration mode.
Capture Instead of Release: Defect-Modulated Radionuclide Leaching Kinetics in Metal–Organic Frameworks
作者:Kyoung Chul Park、Corey R. Martin、Gabrielle A. Leith、Grace C. Thaggard、Gina R. Wilson、Brandon J. Yarbrough、Buddhima K. P. Maldeni Kankanamalage、Preecha Kittikhunnatham、Abhijai Mathur、Isak Jatoi、Mackenzie A. Manzi、Jaewoong Lim、Ingrid Lehman-Andino、Alejandra Hernandez-Jimenez、Jake W. Amoroso、David P. DiPrete、Yuan Liu、Joseph Schaeperkoetter、Scott T. Misture、Simon R. Phillpot、Shenyang Hu、Yulan Li、Antoine Leydier、Vanessa Proust、Agnès Grandjean、Mark D. Smith、Natalia B. Shustova
DOI:10.1021/jacs.2c06905
日期:2022.9.7
modulation of metal–organic frameworks (MOFs) and porous functionalized silica-based materials was performed on the example of a radionuclide and radionuclide surrogate for the first time, revealing an unprecedented readsorption phenomenon. On a series of zirconium-based MOFs as model systems, we demonstrated the ability to capture and retain >99% of the transuranic 241Am radionuclide after 1 week of storage