A dual-responsive luminescent Zn(II) coordination polymer as sensor for the detection of acetylacetone and Fe 3+ ion

A new coordination polymer, {[Zn 2 (L) 2 (TDC) 2 ]·H 2 O} n ( 1 ) (L = 1,4-bis(1 H -benzimidazol-2-yl)butane, H 2 TDC = 2,5-thiophenedicarboxylic acid), was hydrothermally synthesized and characterized. 1 displays a 2D sql network, which extends into a 3D supramolecular network through hydrogen bonding. 1 shows thermal stability when the TGA temperature is below 245 °C and excellent pH stability (3–12). 1 is able to selectively detect acetylacetone and Fe 3+ ions, respectively, with recyclability and low detection limits. The luminescence mechanism is analyzed in detail. Graphical Abstract A new dual-responsive luminescent coordination polymer (CP), {[Zn 2 (L) 2 (TDC) 2 ]·H 2 O} n ( 1 ) (L = 1,4-bis(1 H -benzimidazol-2-yl)butane, H 2 TDC = 2,5-thiophenedicarboxylic acid), was hydrothermally synthesized and characterized, which showed good thermal and water stabilities. 1 displays a 2D sql layer and extends into a 3D supramolecular network through hydrogen bonding. 1 is promising a dual-functional luminescent sensor-based CP for detection of acetylacetone and Fe 3+ cation with high sensitivity and selectivity.