Two fluorescent copper phosphonate complexes for sensing antibiotics, ketones and Fe³⁺ in water

Abstract

As the most attractive and fastest growing fluorescent sensing materials, metal-organic compounds have demonstrated great potential for the detection of various types of chemicals. Two fluorescent phosphonate complexes(2) with diverse structures were designed and synthesized for this purpose from ((2'-cyano-[1,1'-biphenyl]-4-yl) methyl)phosphonic acid (H 2 L) and copper ions with various valence state under solvothermal conditions. The structures of 1 and 2 are determined by single X-ray crystal diffraction, and further characterized by elemental analysis, IR, TGA and PXRD. The two complexes demonstrate diverse properties on sensing Fe 3 + ions, ketone and some antibiotics, and the according detection limits are obtained, indicating which could be applied as a fast, recyclable, and multi-responsive fluorescence sensor. The sensing activity diversity between 1 and 2 toward different analytes was also discussed based on the possible sensing mechanisms to further explore the possible factors affecting the sensibility of the materials.

Turn‐on luminescent sensing of glutathione and cysteine based on post‐modified Bio‐MOF‐1

“…[9][10][11] Metal organic frameworks (MOFs) are a class of functional materials comprised of metal ions linked together by organic ligands to form an extended and crystalline framework. [12][13][14][15][16][17][18][19] MOFs have emerged as multifunctional sensing materials for applications of sensing organic small molecules. [20][21][22][23][24][25] However, most MOF sensors are based on turnoff fluorescence response to detect target molecules, which may reduce the sensing efficiency.…”

“…Fluorescent probe might be a suitable method for GSH and Cys detection due to its inherent advantages, including high selectivity and sensitivity, low limit of detection, in situ monitoring and so on [9–11] . Metal organic frameworks (MOFs) are a class of functional materials comprised of metal ions linked together by organic ligands to form an extended and crystalline framework [12–19] . MOFs have emerged as multifunctional sensing materials for applications of sensing organic small molecules [20–25] .…”

A Novel and Reactive Fluorescent “Turn‐on” Probe Based on Benzimidazole Derivative for Selective CN−Detection

“…Therefore, a large number of selective sensors have been developed and provide convenient and rapid strategies for CN − detection [39–52] . The fluorescent chemical sensors exhibit many satisfactory characteristics such as high sensitivity and selectivity, visual detection and optical imaging [53–68] . However, some sensors still suffer from complex preparation processes, high costs, demanding detection conditions or low sensitivity [69–75] .…”