title: The design and synthesis of a non-centric diamond-like network based NH4+ ion.
abstract: Two novel acentric hydrogen bonded two-dimensional sheet and three-dimensional 2-fold interpenetrating diamond-like networks have been designed and prepared based on a tetrahedral ammonium node and the O,O'-bifunctional linker molecules dipyridine dioxide (dpdo) and trans-bis(4-pyridyl)ethylene dioxide (bpedo).