Phosphonate Monoesters as Carboxylate-like Linkers for Metal Organic Frameworks
摘要:
Bidentate phosphonate monoesters are analogues of popular dicarboxylate linkers in MOFs, but with an alkoxy tether close to the coordinating site. Herein, we report 3-D MOF materials based upon phosphonate monoester linkers. Cu(1,4-benzenediphosphonate bis(monoalkyl ester), CuBDPR, with an ethyl tether is nonporous; however, the methyl tether generates an isomorphous framework that is porous and captures CO2 with a high isosteric heat of adsorption of 45 kJ mol(-1). Computational modeling reveals that the CO2 uptake is extremely sensitive both to the flexing of the structure and to the orientation of the alkyl tether.
C–P bond formation of cyclophanyl-, and aryl halides <i>via</i> a UV-induced photo Arbuzov reaction: a versatile portal to phosphonate-grafted scaffolds
A new versatile method for the C–P bond formation of (hetero)aryl halides with trimethyl phosphite via a UV-induced photo-Arbuzov reaction, accessing diverse phosphonate-grafted arenes, heteroarenes and co-facially stacked cyclophanes under mild reaction conditions without the need for catalyst, additives, or base is developed. The UV-induced photo-Arbuzov protocol has a wide synthetic scope with large