Inorganic–organic hybridization induced uniaxial zero thermal expansion in MC4O4 (M = Ba, Pb)†
Abstract
We report two inorganic–organic hybrid materials with pillar-layered architectures, BaC4O4 and PbC4O4, which show uniaxial zero thermal expansion (ZTE) along the hybrid direction over a wide temperature range. The local structure and lattice dynamic investigations reveal that the ZTE derives from the cooperation of the NTE of the inorganic Ba–O (or Pb–O) layer and the PTE of the squarate pillar.