An enantioenriched vanadium phosphonate generated via asymmetric chiral amplification of crystallization from achiral sources showing a single-crystal-to-single-crystal dehydration process

摘要

By using an asymmetrical 2-carboxyphenylphosphonate ligand (2-cpp~(3-)), a chiral layered vanadium compound (VO)_3(2-cpp)-2-(H_2O)_6 H_2O (1) is isolated. The bulk sample is enantioenriched due to symmetry breaking on crystallization. Partial release of the coordination water molecules upon heating leads to a single-crystal-to-single-crystal transformation to compound [(VO)_3(2-cpp)_2(H_2O)_4I (la) which is centrosymmetric. Chiral inorganic-organic hybrid materials are of intense current interest due to their important applications in enantio-selective separation and catalysis, nonlinear optics, sensors, and multifunctional materials.