19094-48-5Relevant articles and documents
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).
Chiral oxazoline substituted optically active poly(m-phenylene)s: Synthesis and coupling polymerizations of (S)-4-benzyl-2-(3,5-dihalidephenyl) oxazoline using transition metal catalysts
Rattanatraicharoen, Poompat,Tanaka, Yoko,Shintaku, Keiko,Kawaguchi, Takuro,Yamabuki, Kazuhiro,Oishi, Tsutomu,Onimura, Kenjiro
, p. 1315 - 1322 (2013/04/10)
Optically active poly(m-phenylene)s substituted with chiral oxazoline derivatives have been synthesized by the nickel-catalyzed Yamamoto coupling reaction of optically active (S)-4-benzyl-2-(3,5-dihalidephenyl)oxazoline derivatives (X = Br or I). The structures and chiroptical properties of the polymers were characterized by spectroscopic methods and thermal gravimetric analyses. The polymers showed higher absolute optical specific rotation values than their corresponding monomer, and showed a Cotton effect at transition region of conjugated main chain. The optical activities of the polymers should be attributed to the higher order structure such as helical conformations. Moreover, the helical conformation could be induced by addition of metal salts into polymer solutions. The polymers showed good thermal stabilities, which was attributable to the oxazoline side chains.
A rigid metallohexameric macrocycle composed of endo- and exo-cyclic bisterpyridine-metal complexes
Li, Sinan,Moorefield, Charles N.,Shreiner, Carol D.,Wang, Pingshan,Sarkar, Rajarshi,Newkome, George R.
experimental part, p. 2130 - 2135 (2011/11/13)
Synthesis of terpyridine-based building blocks has allowed the self-assembly of a nanosized metallomacrocycle with precisely positioned, peripheral metal complexes. Construction of the precursors included the assembly of a heteroleptic bisterpyridine-Ru(ii) complex possessing a diiodoaryl moiety that was subsequently reacted with two equivalents of 4′-ethynyl-2, 2′:6′,2′′-terpyridine via a Pd(0)-catalyzed Sonagashira coupling, to generate the requisite monomer with two, 120°-juxtaposed metal coordination sites. Addition of one equivalent of Fe(ii) to one equivalent of the bisligand afforded the metallocycle with 12 metals [6 internal Fe(ii) ions and 6 external Ru(ii) ions] measuring ca. 7 nm in diameter.
