Incorporating different secondary building units of {Bi_2}, {Bi_8} and {Bi_(10)} to construct diversity of luminescent bismuth-organic frameworks

摘要

Three new bismuth-organic compounds, namely, Bi(OH)(2,6-pdc)·H_2O (1), Bi_(OH)_4(2,6-pdc)_4(H_2O)_3·H_2O (2) and Bi_5(OH)_5(2,6-pdc)_5(H_2O)_4·H_2O (3) (2,6-H_2pdc = pyridine-2,6-dicarboxylate) have been obtained by incorporating different Bi subunits as building blocks under hydrothermal conditions. Compound 1 contains dimeric {Bi_2} units and these are further linked by 2,6-pdc~(2-) ligands into a 2D net with 36 topology. Compounds 2-3 display 4~4 net topology by using linear {Bi_8} and {Bi_(10)} as secondary building units (SBUs), respectively. Compounds 1-3 display yellow and blue luminescence, respectively. Furthermore, the PXRD, TGA, UV-visible and IR spectra of 1-3 were also studied.