482620-72-4Relevant articles and documents
Porous metal-organic alloys based on soluble coordination cages
Antonio, Alexandra M.,Bloch, Eric D.,Korman, Kyle J.,Yap, Glenn P. A.
, p. 12540 - 12546 (2020/12/18)
Diverse strategies for the preparation of mixed-metal three-dimensional porous solids abound, although many of them lend themselves only moderate levels of tunability. Herein, we report the design and synthesis of surface functionalized permanently microporous coordination cages and their use in the isolation of mixed metal solids. Judicious alkoxide-based ligand functionalization was utilized to tune the solubility of starting copper(ii)-based cages and their resulting compatibility with the mixed-cage approach described here. We further prepared a family of isostructural molybdenum(ii) cages for a subset of the ligands. The preparation of mixed-metal cage solids proceeds under facile conditions where solutions of parent cages are mixed and product phases isolated. A suite of spectroscopic and characterization tools confirm the starting cages are intact in the amorphous product. Finally, we show that utilization of precise ligand functional groups can be used to prepare mixed cage solids that can be easily and cleanly separated into their constituent components through simple solvent washing or solvent extraction techniques.
Studies on the enantioselective catalysis of photochemically promoted transformations: "Sensitizing receptors" as chiral catalysts
Cauble, David F.,Lynch, Vincent,Krische, Michael J.
, p. 15 - 21 (2007/10/03)
A strategy for the enantioselective catalysis of photomediated reactions in solution is described, involving the use of chiral molecular receptors possessing appendant triplet-sensitizing moieties. Energy transfer is selectively directed to bound substrate as a consequence of the distance dependence of triplet-triplet energy transfer. This effect, which is equivalent to a binding-induced rate enhancement, enables substoichiometric chirality transfer from the receptor template to the substrate, as observed in the intramolecular enone-olefin photo [2 + 2]cycloaddition of a quinolone substrate.
