Dy(III)-Based Metal–Organic Framework as a Fluorescent Probe for Highly Selective Detection of Picric Acid in Aqueous Medium

Abstract

A dysprosium metal–organic framework, {[Dy­(μ2-FcDCA)1.5­(MeOH)­(H2O)]·0.5H2O} n (1), where FcDCA = 1,1′-ferrocene dicarboxylic acid, was prepared by slow-diffusion technique at room temperature. The crystal structure analysis of 1 by single-crystal X-ray diffraction reveals different binding modes of FcDCA linkers coordinated with Dy­(III) metal ions, which forms continuous porous two-dimensional (2D) infinite framework. The resulting 2D layers are linked by π···π interactions to build three-dimensional (3D) supramolecular framework. Observably, this thermally stable 3D architecture was topologically simplified as a three-connected uninodal net with fes topology. Furthermore, the practical applicability of 1 was investigated as a fluorescence sensor for the sensitive detection of picric acid in aqueous medium with an impressive detection limit of 0.71 μM with quenching constant (K SV) quantified to be 8.55 × 104 M–1. The distinguished selectivity in the presence of other nitroaromatics suggests the possible incorporation of 1 in real-world futuristic diagnostic kits. Additionally, the electrochemical behavior of 1 exhibits reversible in nature attributed to the ferrocene/ferrocenium cation.

N-alkylation briefly constructs tunable multifunctional sensor materials: Multianalyte detection and reversible adsorption

“…The sensitivity of fluorescence-quenching sensors to analytes can also be judged from the Stern-Volmer (S-V) constant, K sv , which can be calculated as follows: I 0 /I = 1 + K sv [Q]. As shown in Figures 6 C and S43 C, for PA, DNP, or NP, the S-V plot curved upward at higher concentrations, indicating that this process involves a combination of dynamic and static quenching ( Goswami et al., 2019 ; Rajak et al., 2019 ). In the low concentration range, the S-V plot is linear, and the K sv values for SPBI-c toward PA, DNP, and NP were 6.5631 × 10 4 , 4.5122 × 10 4 , and 3.8651 × 10 4 M −1 , respectively.…”

“…As shown in Figures 6C and S43C, for PA, DNP, or NP, the S-V plot curved upward at higher concentrations, indicating that this process involves a combination of dynamic and static quenching (Goswami et al, 2019;Rajak et al, 2019). In the low concentration range, the S-V plot is linear, and the K sv values for SPBI-c toward PA, DNP, and NP were 6.5631 3 10 4 , 4.5122 3 10 4 , and 3.8651 3 10 4 M À1 , respectively.…”

Three-fold interpenetrated metal–organic framework as a multifunctional fluorescent probe for detecting 2,4,6-trinitrophenol, levofloxacin, and l-cystine

“…Nitroaromatic explosives, such as TNP, have attracted increasing attention due to their applications in civilian safety and environmental and homeland security. 1,[23][24][25] Levofloxacin (LVX) is a third-generation fluoroquinolone antibiotic drug that is widely used in human and veterinary medicine to treat infectious diseases. 26 However, the excessive use of LVX may promote the development of drug-resistant bacteria and antibioticresistant infections and cause environmental problems.…”

A New Compound for Sequential Sensing of Picric Acid and Aliphatic Amines: Physicochemical Details and Construction of Molecular Logic Gates

“…[8] Host-guest based competitive binding controlled aggregation-induced emission (AIE) method came handy in detecting PA. [9][10][11][12][13][14][15][16][17] Even carbon dotbased polypyrrole nanocomposites and sol-gel methods also proved beneficial for PA detection. [18][19][20][21][22][23][24][25] Moreover, modern day metal-organic-frameworks (MOFs) [26][27][28][29][30][31][32][33][34][35][36][37][38] and covalent-organicframeworks (COFs) [39][40][41] were found to provide good sensor materials for PA in different solvents. There are numerous small molecule sensors as well to detect PA with low LOD.…”