Polyiodine-Modified 1,3,5-Benzenetricarboxylic Acid Framework Zn(II)/Cd(II) Complexes as Highly Selective Fluorescence Sensors for Thiamine Hydrochloride, NACs, and Fe³⁺/Zn²⁺

Abstract

Four new complexes, [Zn(TIBTC)(DMA)]• [NH 2 (CH 3 ) 2 ] (1), [Cd(TIBTC)(H 2 O)]•[NH 2 (CH 3 ) 2 ]•DMA (2), [Cd 2 (TIBTC)(2,2′-bipy) 2 (HCOO)] (3), and [Cd 2 (DIBTC)(2,2′bipy) 2 (HCOO)] ( 4) (H 3 TIBTC = 2,4,6-triiodo-1,3,5-benzenetricarboxylic acid, H 3 DIBTC = 2,4-diiodo-1,3,5-benzenetricarboxylic acid, 2,2′-bipy = 2,2′-bipyridine, and DMA = dimethylacetamide), were successfully synthesized and characterized by elemental analysis, powder X-ray diffraction, infrared spectroscopy, ultraviolet− visible spectroscopy, and thermogravimetric analysis. Complexes 1 and 2 are three-dimensional supramolecular network structures, while complex 4 has a two-dimensional network structure. We preliminarily studied the fluorescence properties of the complexes and found that complexes 1−3 can detect thiamine hydrochloride, NACs, and Fe 3+ /Zn 2+ with high sensitivity and selectivity.

Water-Robust Zinc–Organic Framework with Mixed Nodes and Its Handy Mixed-Matrix Membrane for Highly Effective Luminescent Detection of Fe3+, CrO42–, and Cr2O72– in Aqueous Solution

“…The LOD values of this compound for Fe 3+ , CrO 4 2– , and Cr 2 O 7 2– are comparable to those reported previously, further confirming the potential application of compound 1 as a chemosensor toward these ions (Tables S3–S5). ,− …”

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

“…According to the K SV value, the detection limit (LOD) of complexes 1 and 2 for acetone can be calculated by the formula 3δ/K SV , where δ is the fluorescence emission intensity of three repeated tests (δ = 0.012). [45] As shown in illustration of Figure 7d and e, the SV graph shows a good linear relationship in the low concentration range. As the concentration of acetone increases, the fluorescence curve of the complexes gradually deviates from linearity.…”

Coplanar versus Noncoplanar Carboxyl Groups: The Influence of Sterically Enforced Noncoplanarity on the 2D Mixing Behavior of Benzene Tricarboxylic Acids

“…27 Slightly refined versions of this synthesis have been published recently. 28,29 TMA (Sigma-Aldrich, 98%) and heptanoic acid (Sigma-Aldrich, ≥99%) were used without further purification. For STM experiments, stock solutions (1 mg/mL) of the solid compounds (TMA and I-TMA) were prepared in heptanoic acid.…”

“…I-TMA was synthesized via full iodination of mesitylene, followed by a permanganate oxidation of the three methyl groups as described in a patent . Slightly refined versions of this synthesis have been published recently. , TMA (Sigma-Aldrich, 98%) and heptanoic acid (Sigma-Aldrich, ≥99%) were used without further purification. For STM experiments, stock solutions (1 mg/mL) of the solid compounds ( TMA and I-TMA ) were prepared in heptanoic acid.…”