No abstract

Shuttling rates for neutral and charged [2]rotaxanes with rigid axles varying in lengths from 7.4 to 20.3 Å were found to be independent of the length of the axle, except when the distance was short enough to allow the ring to interact with both recognition sites which provided a short-cut mechanism that significantly lowered the energy barrier.

Zr(IV) metal-organic frameworks (MOFs) UiO-68 and PCN-57, containing linkers triphenylene dicarboxylate (TPDC) and tetramethyl-triphenylene dicarboxylate (TTDC), respectively, were doped with an H shaped, tetracarboxylate linker that contains a [2]rotaxane molecular...

A [2]rotaxane linker was synthesized which combines an H-shaped axle containing four 3-carboxyphenyl groups and a macrocyclic wheel with two 4-pyridyl groups. Metal-organic framework materials were prepared with Cu and Zn ions X-ray structures show that the materials contain unique frameworks that are threaded solely due to the interpenetrated nature of the linker.

A unique hexacarboxylate linker was prepared on the basis of an interlocked [2]rotaxane motif. The linker contains four carboxylate groups attached to a rigid, H-shaped axle and two carboxylate units appended to a crown ether wheel. The resulting Zn II -based metal-organic framework material has a [a]

Methacrylated lignin was reacted with PH3(g) to prepare a phosphorus rich bio-based polymer containing PH/PH2 functional groups, which were converted to tertiary phosphine units via the phosphane-ene reaction. This represents...