Synthesis and optical properties of two novel chlorobismuthate(III) complexes: [8-Hydroxyquinolinium]4K2[BiCl6]2·6H2O (1) and [8-hydroxyquinolinium]6[Bi2Cl10][BiCl5(H2O)]·6H2O(2)

Two novel chlorobismuthate(III) complexes [8-hydroxyquinolinium]4K2[BiCl6]2·6H2O (1) and [8-hydroxyquinolinium]6[Bi2Cl10][BiCl5(H2O)]·6H2O (2) have been synthesized in solution and characterized by single-crystal X-ray diffraction. The structure of 1 contains 1-D inorganic zigzag chains formed by BiCl6 octahedra and KCl4O3 decahedra with organic 8-hydroxyquinolinium cations binding through K–O bonds or H-bonds. And compound 2 has two different anionic units of [Bi2Cl10]4−and [BiCl5(H2O)]2−. IR, UV–vis DRIS, and fluorescent spectra of two compounds were studied.