ZnSe(dbn)_(1/2) and ZnSe(had)_(1/2): Two New Members of Inorganic-Organic Hybrid Semiconductor Nanocomposites Exhibiting A Strong Quantum Confinement Effect

摘要

Two new inorganic-organic hybrid Ⅱ-Ⅵ semiconductor nanostructures have been synthesized by solvothermal reactions. These nanostructures consist of inorganic_∝~2[ZnSe] layers and organic bridging diamine molecules as spacers. The crystal structures of [ZnSe(dbn)_(1/2)](l, dbn= 1,4-diaminobutane) and [ZnSe(hda)_(1/2)](2, hda = 1,6-hexanediamine) have been determined by the powder X-ray diffraction method. They are isostructural and crystallize in the orthorhombic crystal system, space group Pbca(No.62), Z = 4. Crystal data for 1: a = 6.646(3), b = 6.473(3), c = 22.31(1) A, V = 961.2(13) A~3, for 2: a = 6.6252(18), b = 6.4505(17), c = 27.138(7) A, V = 1159.8(9) A~3. The optical absorption experiments show that both 1 and 2 generate a very large blue shift in the absorption edge (1.5-1.6 eV) due to a strong quantum confinement effect (QCE). Thermogravimctric behavior of both compounds has also been investigated.