Incorporating different secondary building units of {Bi2}, {Bi8} and {Bi10} to construct diversity of luminescent bismuth-organic frameworks.

Three new bismuth-organic compounds, namely, Bi(OH)(2,6-pdc)·H(2)O (1), Bi(4)(OH)(4)(2,6-pdc)(4)(H(2)O)(3)·H(2)O (2) and Bi(5)(OH)(5)(2,6-pdc)(5)(H(2)O)(4)·H(2)O (3) (2,6-H(2)pdc = 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 3(6) 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.