The tetrahedral zwitterion of tetrakis(p-carboxyphenyl) phosphonium is employed as a unique building block for robust and lighter MOFs that tolerate sorption of acidic gases including H2S.
We demonstrate a simple and generalizable
method for the one pot, in situ formation of bimetallic metal–organic
framework (MOF) materials decorated with crystallographically defined,
low-valent metal sites. Solvothermal reactions between poly(carboxylated)
aryl(phosphine) ligands and mixtures of higher- and lower-valent metal
precursors achieves concomitant P–M complexation and MOF formation
via metal–carboxylate network bonding. This method is demonstrated
in the preparation of two new phosphine coordination materials, PCM-107
and PCM-74, which feature Ar3P–AuX (X = Cl, Br)
and chelated
–Cu2I2–
units as the MOF building blocks, respectively.
PCM-107 is an active catalyst for alkyne hydroaddition, while PCM-74
shows promise for the crystallization of MOFs bearing kinetically
favored isomers.
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