Tandem post-synthetic modification for functionalized metal–organic frameworks via epoxidation and subsequent epoxide ring-opening
作者:Konrad Hindelang、Sergei I. Vagin、Christian Anger、Bernhard Rieger
DOI:10.1039/c2cc16949e
日期:——
A sequence of two new post-synthetic modifications, epoxidation using dimethyldioxirane and subsequent epoxide ring-opening, was developed, maintaining the MOF network. A kinetic study shows that the functionalization of metal-organicframeworks with synthetically versatile and reactive oxirane groups is even possible for small pore diameters.
Functionalization of Metal-Organic Frameworks through the Postsynthetic Transformation of Olefin Side Groups
作者:Konrad Hindelang、Alexander Kronast、Sergei I. Vagin、Bernhard Rieger
DOI:10.1002/chem.201300477
日期:2013.6.17
development of new postsynthetic reactions for the functionalization of solid materials. The postsynthetic oxidation of the olefin side groups applying osmium tetroxide (OsO4) as a catalyst led to the formation of a microporous material with free vicinal diol functionalities. The epoxidation with dimethyldioxirane (DMDO) enabled the synthesis of epoxy‐functionalized MOFs. In addition to that, reaction procedures
Thermally Activated Transient Dipoles and Rotational Dynamics of Hydrogen-Bonded and Charge-Transferred Diazabicyclo [2.2.2]Octane Molecular Rotors
作者:Xing Jiang、Hai-Bao Duan、Marcus J. Jellen、Yu Chen、Tim S. Chung、Yong Liang、Miguel A. Garcia-Garibay
DOI:10.1021/jacs.9b07518
日期:2019.10.23
with either triphenylacetic acid (cocrystal I) or 9,10-triptycene dicarboxylic acid (cocrystal II), as hydrogen bonding donors, and diazabicyclo[2.2.2]octane (DABCO) as a ditopic hydrogen bond acceptor. While cocrystal I forms discrete 2:1 complexes with one nitrogen of DABCO hydrogen bonded and the other fully proton transferred, cocrystal II consists of 1:1 complexes forming infinite 1-D hydrogen
我们在此展示了由作为氢键供体的三苯乙酸(共晶 I)或 9,10-三苯乙烯二羧酸(共晶 II)和作为氢键供体的二氮杂双环 [2.2.2] 辛烷(DABCO)形成的共晶的介电性质和旋转动力学双位氢键受体。共晶 I 与 DABCO 的一个氮氢键形成离散的 2:1 复合物,另一个完全质子转移,而共晶 II 由 1:1 复合物组成,形成无限的一维氢键链,能够以宽不对称峰在约。从大约 298 K 延伸。其复电介质的实部和虚部均为 200 K 至 375 K。共晶 II 在 298 K 和 386 K 的质子化状态由 CPMAS 15N NMR 确定,它显示了中性氢键复合物的典型信号。综上所述,这些观察结果表明,当酸性质子被瞬时转移到 DABCO 基的任一侧时,热产生的一小群瞬时偶极子会产生介电响应。通过利用 DABCO 基团的高度敏感的旋转动力学,使用固态自旋回波 2H NMR 和 1H NMR T1
KOGA, NOBORU;KAWADA, YUZO;IWAMURA, HIIZU, TETRAHEDRON, 1986, 42, N 6, 1679-1686