Highly regenerative, fast colorimetric response for organo-toxin and oxo-anions in an aqueous medium using a discrete luminescent Cd(ii) complex in a heterogeneous manner with theoretical revelation

Abstract

The highly luminescent complex [CdQ2(H2O)2] (1) showed ultra-selective and highly sensitive to explosive organo-toxin trinitro phenol (TNP). This detection is extremely fast with high quenching constant (5.3×104 M-1) and very...

Coordination Unsaturation and Basic Site-Immobilized Nanochannel in a Chemorobust MOF for 3-Fold-Increased High-Temperature Selectivity and Fixation of CO2 under Mild Conditions with Nanomolar Recognition of Roxarsone

“…The turn-off response was quantitatively evaluated from the quenching constant ( K sv ) using the Stern–Volmer (S–V) equation, which divulged a value of 7.56 × 10 4 M –1 at a lower concentration range (0–0.016 mM) (Figure S38). A comparative study depicts that the present K sv is superior to that of most of the previously reported aqueous-phase ROX sensory probes. , The sharp upward bent in the S–V plot of ROX at higher concentrations (Figures b and S37) points to the concomitant presence of static and dynamic quenching. Further, the limit of detection (LOD) was evaluated by employing the formula 3σ/ m , which comes out to be 68 nM (93.5 ppb).…”

“…Specifically, roxarsone (4-hydroxy-3-nitrophenylarsonic acid, i.e., ROX) is an organoarsenic compound widely applied in the poultry industry and also used as an antibacterial agent. 31 Entry of these feed additives into the wastewater of livestock farms transforms them into inorganic arsenic species, which accumulate in plants and eventually enter into the human body through a food chain. Since arsenic is a confirmed carcinogen causing acute health concerns, molecular recognition of ROX is highly demanding.…”

Multifunctional cobalt metal–organic framework luminescent probe for the efficient sensing of Cr2O72−, MnO4− and nucleobases

“…For Cr 2 O 7 2− and MnO 4 − oxo-anions, these K SV values are comparable to those of other sensing materials reported in the literature, thereby confirming its competitiveness. 31 Furthermore, the detection limit for each was evaluated using the formula 3 σ / m , where σ is the standard deviation of five blank measurements of the emission intensity for Co-bpy and m is the slope from linear fitting of the emission intensity vs. analyte concentration curve. The LOD was found to be 2.6 × 10 −6 M for Cr 2 O 7 2− and 9.5 × 10 −7 M for MnO 4 − (Fig.…”

Metal–organic framework (MOF)-based fluorescence “turn-on” sensors

“…[129][130][131] Generally, nitrogen-rich organic compounds, nerve agents and NACs belong to the category of hazardous/toxic compounds. 132,133 Thus, researchers are devoted on the development of sophisticated detection techniques for the sensing of these lethal entities. Luminescent MOFs are considered potential candidates in this regard.…”