A new potential nonlinear optical hybrid semi-organic crystal of ZnMnCl4(TPPO)4 with attractive physical properties

Abstract

This paper describes the crystal growth, structure and properties of a new semi-organic hybrid crystal with an accurate molecular formula of ZnMnCl₄(TPPO)₄ by a guest–host combination of ZnCl₂(TPPO)₂ and MnCl₂(TPPO)₂ for the first time and its formation is bidirectional. It crystallizes in the acentric space group Fdd2. The 3D framework of the crystal structure is formed by triphenylphosphine oxide (TPPO), linked with a mixture of zinc(II) chloride and manganese(II) chloride. A mixed occupancy of zinc and manganese atoms was designed to form a noncentrosymmetric coordination compound, which exhibits relatively strong second-order nonlinear properties. The powder of this crystal shows a phase-matchable SHG effect that is twice that of KH₂PO₄ (KDP). The crystal has a broad optical transmission range, relatively good stability and a wide band gap. It is also magnetic and luminescent. The properties of this new crystal make it a potential candidate for improved or even novel devices.