Synthesis, structures and guest molecules adsorption of Zn(II)-bridged metal-organic polymers

Two coordination polymers {[Zn(fum)(btmb)]·3H2O}n (1) and {[Zn(2,3-pzdc)(tttmb)(H2O)2]·H2O}n (2) (H2fum=fumaric acid, btmb=4,4′-bis(1,2,4-triazol-1-ylmethyl)biphenyl, 2,3-H2pzdc=2,3-pyrazinedicarboxylic acid, tttmb=1,3,5-tris(triazol-1-ylmethyl)-2,4,6-trimethylbenzene) have been synthesized and structurally characterized. Compound 1 is a two-fold interpenetrating 2D network; significant π–π interactions in adjacent layers finally result in a 3D supramolecular framework with 14.167×7.831Å channel. Compound 2 is a 1D chain. The guest molecules (fluorescein and phenylfluorone) adsorption behaviors of 1 and luminescent properties of 1 and 2 have been investigated.