Synthesis, Structure And Photoluminescence Performance Of Organic Templated Borates

In this thesis, four organic templated borates were synthesized by reaction of boric acid、ionic liquids and organic diamines as reactants under hydrothermal(solvothermal) conditions or in aqueous solution. Their crystal structures have been determined by single-crystal X-ray diffraction data and further characterized by element analysis, powder X-ray diffraction, FT-IR spectroscopy, thermal gravity analysis and photoluminescence spectra. Meanwhile heat treatment of these four organic templated borates had been done, and the samples after heat treatment had been characterized by powder X-ray diffraction, FT-IR spectroscopy and photoluminescence spectra. In addition, the effect on their fluorescence properties and thermal stabilities after heat treatment were discussed. single-crystal X-ray diffraction data are as follows:The crystal of Compound [C4H12N][B5O6(OH)4](1) belongs to P2I/C monoclinic space group, with the following cell parameters:a=9.2546(19) Α, b=16.855(3)Α c=9.2894(19) Α, β=96.13(3)°, V=1440.8(5) Α3. A green photoluminescence phenomenon occurs with an emission maximum at503nm upon excitation at300nm after heat treatment at300℃.The crystal of Compound [C2H8N][B5O6(OH)4](2) belongs to P-1triclinic space group, with the following cell parameters:a=8.879(4)Α, b=16.940(9)Α, c=17.763(9)Α, α=102.706(6)°, β=99.121(6)°, γ=102.779(6)°, V=2481(2)Α3. A photoluminescence phenomenon occurs with an emission maximum at466nm upon excitation at399nm after heat treatment at250℃.The crystal of Compound [C6H15N2][B5O6(OH)4](3) belongs to Cc monoclinic space group, with the following cell parameters:a=9.8011(14) Α, b=20.946(3)Α, c=14.606(2) Α, β=94.545(2)°, V=2989.2(7) Α3. A blue photoluminescence phenomenon occurs with an emission maximum at451nm upon excitation at363nm after heat treatment at200℃The crystal of Compound [C6H15N2][B5O6(OH)4](4) belongs to P-1triclinic space group, with the following cell parameters:a=8.743(6)Α, b=9.257(7)Α, c=10.304(8)Α, α=77.905(9)°, β=75.289(6)°,γ=87.617(9)°, V=788.7(10) Α3. A blue photoluminescence phenomenon occurs with an emission maximum at466nm upon excitation at362nm after heat treatment at360℃.