250288-94-9Relevant academic research and scientific papers
Alanine-Based Chiral Metallogels via Supramolecular Coordination Complex Platforms: Metallogelation Induced Chirality Transfer
Sun, Yue,Li, Shuai,Zhou, Zhixuan,Saha, Manik Lal,Datta, Sougata,Zhang, Mingming,Yan, Xuzhou,Tian, Demei,Wang, Heng,Wang, Lei,Li, Xiaopeng,Liu, Minghua,Li, Haibing,Stang, Peter J.
, p. 3257 - 3263 (2018)
Chiral self-assemblies constantly attract great interest because of their potential to provide insight into biological systems and materials science. Herein we report on the efficient preparation of alanine-based chiral metallacycles, rhomboids 1D and 1L and hexagons 2D and 2L using a Pt(II) a pyridyl directional bonding approach. The metallacycles are subsequently assembled into nanospheres at low concentration, that generate chiral metallogels at high concentration driven by hydrogen bonding, hydrophobic and π-π interactions. The gels consist of microscopic chiral nanofibers with well-defined helicity, as confirmed by circular dichroism (CD) and scanning (SEM) and transmission electron (TEM) microscopies. Given these results, we expect this technique will not only unlock interesting new approaches to understand homochirality in nature but also allow the design of versatile soft materials containing chiral supramolecular cores.
Rational Design and Synthesis of a Highly Porous Copper-Based Interpenetrated Metal-Organic Framework for High CO2 and H2 Adsorption
Bose, Purnandhu,Bai, Linyi,Ganguly, Rakhesh,Zou, Ruqiang,Zhao, Yanli
, p. 1259 - 1266 (2015/08/11)
Interpenetrated metal-organic frameworks (MOFs) are often observed to show lower porosity than their non-interpenetrating analogues. It would be highly desirable if the interpenetrated MOFs could still provide high stability, high rigidity, and optimal pore size for applications. In this work, an asymmetrical tricarboxylate organic linker was rationally designed for the construction of a copper(II)-based microporous MOF with a twofold interpenetrated structure of Pt3O4 topology. In spite of having structural interpenetration, the activated MOF shows high porosity with a Brunauer-Emmett-Teller surface area of 2297 m2g-1, and high CO2 (15.7 wt% 273 K and 1 bar) and H2 uptake (1.64 wt% 77 K and 1 bar). Playing with symmetry: A C2-symmetric tricarboxylate organic linker with elongated arms has been developed for the construction of a twofold interpenetrated metal-organic framework. Despite its structural interpenetration, the framework exhibits high surface area and high adsorption capability for CO2 and H2 (1.64 wt% at 77 K and 1 bar).
Synthesis of chiral 1,3-bis(1-(diarylphosphoryl)ethyl)-benzenes via Ir-catalyzed double asymmetric hydrogenation of bis(diarylvinylphosphine oxides)
Liu, Xu,Han, Zhaobin,Wang, Zheng,Ding, Kuiling
, p. 1073 - 1078 (2014/08/18)
A class of chiral 1,3-bis(diarylphosphinoethyl)benzenes, which are key intermediates for the synthesis of PCP-type chiral pincer ligands, were prepared in high diastereomeric ratios and excellent ee values via double asymmetric hydrogenation of the corresponding bis(diarylvinylphosphine oxide) substrates using a SpinPhox/Ir(I) complex as the catalyst. The hydrogenation product 5a was readily transformed into the corresponding borane-protected chiral PCP-type pincer ligand 7a with high enantiomeric excess, exemplifying a viable synthetic route to optically active chiral PCP pincer ligands.
Synthesis of new arylcarboranes as precursors for oligomers
Foerster, Beate,Bertran, Josep,Teixidor, Francesc,Vinas, Clara
, p. 67 - 73 (2007/10/03)
Some new aryl o-carboranes have been synthesized. From methyl 3-iodo-5-(trimethylsilyl-ethynyl)-benzoate (1) or butyl 3-(3,3-diethyltriazeno)-5-ethynyl-benzoate (2), 5-ethynyl-3-iodo-benzoates (3a, 3b) were obtained, which after the reaction with the deca
