A dual functional 1D Cd‐based coordination polymer for the highly luminescent sensitive detection of Fe³⁺ and picric acid

Abstract

Fluorescent coordination polymers have drawn extensive attention in sensing applications. Herein, we report a carbazole-based one-dimensional coordination polymer [CdL(H 2 O)(DMF) 2 ]•DMF (CdL, H 2 L = 9H-carbazole-2,-7-dicarboxylic acid, DMF = N,N-dimethylformamide). In CdL, each Cd 2+ ion is four-bridged by carboxylates, which is further linked by the carbazole units to form a one-dimensional Cd-O-C chains along the c-axis. CdL displays high water stability in the pH range of 3-10. Luminescence experiments indicate that CdL could selectively detect Fe 3+ during the concentration range of 0-0.1 mM in water with a K sv of 8022 M −1 and picric acid (PA) within the concentration range of 0-0.05 mM in methanol solution with a K sv of 17948 M −1 respectively. The above results reveal that CdL can be applied as a multiresponse luminescence sensor for selectively sensing for Fe 3+ in water and PA in methanol solution.

Four isostructural lanthanide metal–organic frameworks: luminescence properties and fluorescence sensing for Fe3+and Cr2O72−ions

“…4 Thus, it has become particularly important and necessary to develop a low-cost, high-efficiency and fast-response fluorescence sensing method for the trace detection of Fe 3+ /Cr 2 O 7 2− ions. 5…”