Here we report the synthesis and structural characterization of four[7]rotaxanes formed by coordinating hybrid inorganic-organic[2]rotaxanes to a central{Ni_(12)}core.X-ray single crystal diffraction demonstrate that[...Here we report the synthesis and structural characterization of four[7]rotaxanes formed by coordinating hybrid inorganic-organic[2]rotaxanes to a central{Ni_(12)}core.X-ray single crystal diffraction demonstrate that[7]rotaxanes are formed,with a range of conformations in the crystal.Small angle X-ray scattering supported by molecular dynamic simulations demonstrates that the large molecules are stable in solution and also show that the conformers present in solution are not those found in the crystal.Pulsed EPR spectroscopy show that phase memory times for the{Cr_(7)Ni}rings,which have been proposed as qubits,are reduced but not dramatically by the presence of the{Ni_(12)}cage.展开更多
基金supported by the EPSRC(EP/R043701/1)including an Established Career Fellowship(EP/R011079/1)to REPWREPW also thanks the European Research Council for an Advanced Grant(ERC-2017-ADG-786734)+2 种基金We also thank the EPSRC for an X-ray diffractometer(EP/K039547/1)the National Research Facility for EPR(EP/W014521/1 and EP/V035231/1)We thank the University of Manchester for a President's Scholarship(to TSB).
文摘Here we report the synthesis and structural characterization of four[7]rotaxanes formed by coordinating hybrid inorganic-organic[2]rotaxanes to a central{Ni_(12)}core.X-ray single crystal diffraction demonstrate that[7]rotaxanes are formed,with a range of conformations in the crystal.Small angle X-ray scattering supported by molecular dynamic simulations demonstrates that the large molecules are stable in solution and also show that the conformers present in solution are not those found in the crystal.Pulsed EPR spectroscopy show that phase memory times for the{Cr_(7)Ni}rings,which have been proposed as qubits,are reduced but not dramatically by the presence of the{Ni_(12)}cage.
