4,4'-(Benzo[c][1,2,5]thiadiazole-4,7-diyl)dibenzoic acid

4,4'-(Benzo[c][1,2,5]thiadiazole-4,7-diyl)dibenzoic acid (H2BTDB), CAS number 1581774-76-6, has a benzo[c][1,2,5]thiadiazole core with 4- benzoic acid at 4,7-positions.

Fluorescent Eu-MOF with Eu³⁺ ions as metal nodes and electron-deficient, thiadiazole-functionalized ligand H2BTDB as organic linkers is developed for dual-target detection. Sensitive detection of both ethylamine and gossypol was achieved with a detection limit of 1.30 μm and 4.32 μm, respectively, thanks to the large pore structure of the MOF.

Two-fold interpenetrated metal–organic framework (MOF), {[Cd₂(BTDB)₂(4,4-bpy)]·DMF}_n (4,4-bpy = 4,4-bipyridine),  JXUST-14, is a highly selective and sensitive luminescent sensor for L-histidine (His) with a detection limit of 11.1 ppm. JXUST-14 is the first Cd(II)-based MOF for the detection of His via turn-on and fluorescence blue-shift effects. Eu-MOF {[(CH₃)₂NH₂][Eu(BTDB)₂]·2H₂O}_n (JXUST-11) exhibits a chain-based three-dimensional framework. Moreover, JXUST-11 is considered as a photoluminescent sensor to identify Al³⁺ and Ga³⁺ ions by fluorescence enhancement with the detection limits of 2.9 and 10.2 ppm, respectively.

Luminescent Zr-based MOF having a UiO-68 framework topology and incorporating the π-conjugated H2BTDB ligand showed a selective sensing behaviour towards 2,4,6-trinitrophenol (TNP) even in the presence of other potentially competing nitroaromatic explosive compounds. The detection limit of TNP in methanol suspension was found to be 1.63 ppm. This great fluorescence quenching ability of TNP can be attributed to both energy and electron transfer processes as well as electrostatic interactions between the hydroxyl group of TNP and the Lewis basic N-donor sites of the H2BTDB ligand.

General Information

Chemical Structure

Product Details

MSDS Documentation

4,4'-(Benzo[c][1,2,5]thiadiazole-4,7-diyl)dibenzoic acid MSDS Sheet

Literature and Reviews

1. Thiadiazole-functionalized metal-organic frameworks multifunction-architectonics for dual-target sensing of ethylamine and gossypol, Y. Wang et al., Chem. Eng. J., 441, 136049 (2022); DOI: 10.1016/j.cej.2022.136049.
2. Benzo-2,1,3-thiadiazole-based, highly dichroic fluorescent dyes for fluorescent host–guest liquid crystal displays, X. Zhang et al., J. Mater. Chem., 14, 1901-1904 (2004); DOI: 10.1039/B402645D.
3. Turn-on and blue-shift fluorescence sensor toward l-histidine based on stable CdII metal–organic framework with tetranuclear cluster units, J. Li et al., Dalton Trans., 51, 5983-5988 (2022); DOI: 10.1039/D2DT00390B.
4. A thiadiazole-functionalized ZrIJIV)-based metal–organic framework as a highly fluorescent probe for the selective detection of picric acid, S. Mostakim et al., CrystEngComm, 18, 3104 (2016); DOI: 10.1039/c6ce00421k.
5. Enhanced luminescence in multivariate metal–organic frameworks through an isolated-ligand strategy, Z. Jiang et al., J. Mater. Chem. C, 10, 10473-10479 (2022); DOI: 10.1039/D2TC01949C.
6. A Benzothiadiazole-Based Eu3+ Metal–Organic Framework as the Turn-On Luminescent Sensor toward Al3+ and Ga3+ with Potential Bioimaging Application, J. Li et al., Inorg. Chem., 61 (8), 3607–3615 (2022); DOI: 10.1021/acs.inorgchem.1c03661.