Addition Of Anions Research Articles

Selective Luminescence Turn-On-Based Sensing of Phosphate in the Presence of Other Interfering Anions Using a Heterobimetallic (3d-4d) MOF with an Acidic Pocket.

A luminescent metal-organic framework with the molecular formula [YMn1.5(C7N1H3O5)3(H2O)6]·11H2O, 1 {where C7N1H3O5 = chelidamate}, was synthesized by a hydrothermal method by employing chelidamic acid as an organic ligand and Y(III) and Mn(II) as metal ions. A two-dimensional heterobimetallic structure with phenolic hydroxyl-functionalized pockets was revealed by single-crystal X-ray diffraction analysis of compound 1. PXRD, TGA, IR, BET analysis, and UV-vis spectroscopy were used for the thorough characterization of compound 1. Upon excitation at 280 nm, compound 1 shows bright blue emission, which was utilized for the selective and sensitive turn-on detection of the PO43- ion. Based on Bronsted-Lowry acid-base interactions, the photoluminescence of compound 1 was enhanced in the presence of very low concentrations of the aforementioned anion. The mechanism behind the detection of the phosphate ion has been explored in detail. It was seen that the PO43- anion entered the hydroxyl-functionalized pockets of compound 1 and stabilized the aromatic portion of compound 1 via molecular-level interactions through acid-base interactions. These molecular-level interactions are responsible for the enhancement of the photoluminescence intensity of compound 1 after the incorporation of phosphate ions by reducing the nonradiative transitions. These phenomena were also confirmed by time-correlated single photon counting (TCSPC) measurement, which shows that the excited-state lifetime increased with the increase in addition of phosphate anions. The calculated limit of detection (LOD) of 1 was 19.55 ppb for phosphate (PO43-), which was significantly lesser than the recommended level for the PO43-anion toward the human body. The luminescence enhancement coefficient, KSV, value was also much higher than those of other reported metal-organic frameworks.

Synthesis, Crystal Structure and Optical Properties of 3,5-Dihydroxyphenyl-5-(dimethylamino)naphthalene-1-sulfonate as a Fluorescence Sensor for Fluoride Ion Detection

3,5-Dihydroxyphenyl-5-(dimethylamino)naphthalene-1-sulfonate, also referred to as sensor R1, was synthesized and characterized by 1H- and 13C-NMR, IR, HRMS, and single-crystal X-ray diffraction. Connections in the packing crystal structure of sensor R1 occur through hydrogen bonding interactions. However, no π-π stacking interactions between molecules of sensor R1 were observed. Addition of fluoride ion to a solution of sensor R1 resulted in the appearance of a new absorption band at 310 nm, which corresponded to the deprotonated species, and quenching of the peak at an emission wavelength of 562 nm. For the addition of other anions, there was a slight decrease in corresponding peaks in the UV-visible and emission spectra of sensor R1. According to the 1H-NMR study, the aromatic proton resonances of sensor R1 shifted upfield when adding fluoride ion. Analysis of the solutions prepared using Job’s method revealed that the complexation ratio of the complex formed between sensor R1 and fluoride ion was 1:1. The Stern−Volmer quenching constant (Ksv) between sensor R1 and fluoride ion was characterized as 7157 M−1.

Fucoidan/κ-carrageenan mixed gel: Effect of anions of different valence including chloride, bromide, iodide, sulfate and phosphate

The effects of the differently charged anions, NaCl, NaBr, NaI, Na2SO4, and Na3PO4 on the gel properties and structure of the fucoidan/κ-carrageenan mixed gel (FC) were investigated using the rheometer, texture analyzer, LF-NMR, Cryo-SEM, FT-IR, and XRD. At a certain concentration, Cl− and Br− could stabilize the helical conformation of the gel through electrostatic shielding. The addition of SO42− and PO43− would reduce the strength of the gel. And I− would soften the gel. With increasing anion concentration, the electrostatic repulsion between FUC and KC was gradually enhanced. The FUC dispersions remained liquid after the addition of anions, while FC gelled depending on the type and concentration of anions. The elastic modulus increased with increasing concentration of NaCl and NaBr, but decreased with increasing concentration of NaI, Na2SO4, and Na3PO4. Moreover, the addition of anions promoted the water migration of FC, as reflected by the T23 relaxation time changing from high to low and the significantly higher migration of NaCl and NaBr than NaI and Na2SO4. The pores of the gel microstructure change from disordered to uniform. The FT-IR and XRD results were well related to the structural changes. There is electrostatic repulsion between anion and FC, and the binding ability of FC to monovalent anions and trivalent anions is better than that of divalent anions. Overall, this study could provide a theoretical basis for the design and development of FUC-based gels.

Click Chemistry of Selenium Dihalides: Novel Bicyclic Organoselenium Compounds Based on Selenenylation/Bis-Functionalization Reactions and Evaluation of Glutathione Peroxidase-like Activity

A number of highly efficient methods for the preparation of novel derivatives of 9-selenabicyclo[3.3.1]nonane in high yields based on selenium dibromide and cis,cis-1,5-cyclooctadiene are reported. The one-pot syntheses of 2,6-diorganyloxy-9-selenabicyclo[3.3.1]nonanes using various O-nucleophiles including alkanols, phenols, benzyl, allyl, and propargyl alcohols were developed. New 2,6-bis(1,2,3-triazol-1-yl)-9-selenabicyclo[3.3.1]nonanes were obtained by the copper-catalyzed 1,3-dipolar cycloaddition of 2,6-diazido-9-selenabicyclo[3.3.1]nonane with unsubstituted gaseous acetylene and propargyl alcohol. The synthesis of 2,6-bis(vinylsulfanyl)-9-selenabicyclo[3.3.1]nonane, based on the generation of corresponding dithiolate anion from bis[amino(iminio)methylsulfanyl]-9-selenabicyclo[3.3.1]nonane dibromide, followed by the nucleophilic addition of the dithiolate anion to unsubstituted acetylene, was developed. The glutathione peroxidase-like activity of the obtained water-soluble products was estimated and compounds with high activity were found. Overall, 2,6-Diazido-9-selenabicyclo[3.3.1]nonane exhibits the highest activity among the obtained compounds.

Formal Hydrotrimethylsilylation of Styrenes with Anti-Markovnikov Selectivity Using Hexamethyldisilane.

A combination of CsF and hexamethyldisilane in DMSO enabling an anti-Markovnikov formal hydrotrimethylsilylation of styrenes is reported. Mechanistic investigations detail the reaction pathways, including in situ generation of a silyl anion, the addition of this silyl anion onto the alkene to form a carbanion, and this carbanion is then protonated by DMSO. The choice of the solvent to match its reactivity with the carbanion and silyl anion is key to the success of this reaction.

Theoretical Analysis of Physical and Chemical CO2 Absorption by Tri- and Tetraepoxidized Imidazolium Ionic Liquids.

The efficient capture of CO2 from flue gas or directly from the atmosphere is a key subject to mitigate global warming, with several chemical and physical absorption methods previously reported. Through polarizable molecular dynamics (MD) simulations and high-level quantum chemical (QC) calculations, the physical and chemical absorption of CO2 by ionic liquids based on imidazolium cations bearing oxirane groups was investigated. The ability of the imidazolium group to absorb CO2 was found to be prevalent in both the tri- and tetraepoxidized imidazolium ionic liquids (ILs) with coordination numbers over 2 for CO2 within the first solvation shell in both systems. Thermodynamic analysis of the addition of CO2 to convert epoxy groups to cyclic carbonates also indicated that the overall reaction is exergonic for all systems tested, allowing for chemical absorption of CO2 to also be favored. The rate-determining step of the chemical absorption involved the initial opening of the epoxy ring through addition of the chloride anion and was seen to vary greatly between the epoxy groups tested. Among the groups tested, the less sterically hindered monoepoxy side of the triepoxidized imidazolium was shown to be uniquely capable of undergoing intramolecular hydrogen bonding and thus lowering the barrier required for the intermediate structure to form during the reaction. Overall, this theoretical investigation highlights the potential for epoxidized imidazolium chloride ionic liquids for simultaneous chemical and physical absorption of CO2.

Effect of Halide Anions on the Electroreduction of CO2 to C2 H4 : A Density Functional Theory Study.

The halide anions present in the electrolyte improve the Faradaic efficiencies (FEs) of the multi-hydrocarbon (C2+ ) products for the electrochemical reduction of CO2 over copper (Cu) catalysts. However, the mechanism behind the increased yield of C2+ products with the addition of halide anions remains indistinct. In this study, we analysed the mechanism by investigating the electronic structures and computing the relative free energies of intermediates formed from CO2 to C2 H4 on the Cu (100) facet based on density functional theory (DFT) calculations. The results show that formyl *CHO from the hydrogenation reaction of the adsorbed *CO acts as the key intermediate, and the C-C coupling reaction occurs preferentially between *CHO and *CO with the formation of a *CHO-CO intermediate. We then propose a free-energy pathway of C2 H4 formation. We find that the presence of halide anions significantly decreases the free energy of the *CHOCH intermediate, and enhances desorption of C2 H4 in the order of I- >Cl- >Br- >F- . Lastly, the obtained results are rationalized through Bader charge analysis.

Anion Additive‐Induced Size, Morphology, and Local Structure Tuning of Lanthanide‐Doped Upconversion Nanoparticles

AbstractIntroducing additives during the preparation can effectively modulate characteristics of lanthanide‐doped upconversion nanoparticles (UCNPs) that are pivotal to applications of the nanoparticles, ranging from bioimaging to super‐resolution microscopy. Unfortunately, anion additive‐caused changes in the characteristics of lanthanide‐doped UCNPs are almost unexplored, even though anionic species are ubiquitous. Herein, Na(CCl3COO), as a representative anion additive, is used to demonstrate that anion additives can tune characteristics of cubic NaYF4:Yb/Er UCNPs, including size, morphology, and local structure. Experimental studies, together with theoretical calculations, reveal that Cl− ions released from the anion additive can affect the growth kinetics and selectively cap on planes of crystals during the formation of the UCNPs. Consequently, tuning of characteristics can be achieved, which also enables the modulation of upconversion properties of resulting nanoparticles. Furthermore, the anion additive‐based modulation can facilitate the fabrication of ultrasmall UCNPs with bright luminescence and advance the upconversion‐based information encryption when other techniques are integrated. These results reveal that anionic species should be considered during the preparation of UCNPs, and these findings should shed light on new avenues to fabricate UCNPs with desired properties.

Degradation of ofloxacin in water using heat/S2O82− process

BackgroundThis work examines the degradation of ofloxacin (OFL) in water using the heat/S2O82− process (70 °C). MethodsThe dependences of the degradation of OFL using this process on the Na2S2O8 dosage, pH, initial OFL concentration, and addition of anions were studied. Significant FindingsThe pseudo-first-order kinetic model can fit the degradation of OFL under diverse operating conditions and can be used to obtain the apparent rate constants thereof. Increasing the Na2S2O8 dosage promoted the degradation of OFL. However, the degradation of OFL was inhibited by an excessive Na2S2O8 dosage. The optimal Na2S2O8 dosages in the degradation of OFL at pH 3, pH 7, and pH 11 were 1.92 g/L, 0.96 g/L, and 0.48 g/L, respectively. The degradation of OFL at pH 3 dramatically exceeded that at pH 11. Radical scavenging studies using alcohols reveal that SO4•− predominated at pH 3 and pH 7 but HO• predominated at pH 11. When the initial OFL concentration was increased, the degradation of OFL decreased. Adding CO32− and HCO3− significantly slowed the degradation of OFL. At pH 3 and a duration of 30 min with an Na2S2O8 dosage of 1.92 g/L, and an initial OFL concentration of 10 mg/L, the heat/S2O82− process (70 °C) in the absence of anions degraded 97% of the OFL with a corresponding apparent rate constant of 0.2359 min−1. TOC analysis reveals that the heat/S2O82− process (70 °C) mineralized OFL efficiently. Therefore, the heat/S2O82− process (70 °C) effectively degraded OFL in water.

Study on the interaction of anions with A2B cobalt corroles in non-aqueous medium

A series of five cobalt corrole complexes Co[(p-NO2Ph)2RCor](py)2 where R is functionalized with different aromatic aldehydes at meso positions, was examined in acetonitrile solvent. Three of the five complexes changed color to green in 10[Formula: see text] M acetonitrile solution. Their potential to sense anions was investigated using the colorimetric and spectroscopic approach in 14 different tetrabutyl ammonium salts of F[Formula: see text], CN[Formula: see text], CH3COO[Formula: see text], NO[Formula: see text], AsO[Formula: see text], AsO[Formula: see text], Cl[Formula: see text], Br[Formula: see text], I[Formula: see text], ClO[Formula: see text], H2PO[Formula: see text], S[Formula: see text], HS[Formula: see text]and PF[Formula: see text]. Co-1, Co-2 and Co-4 shows selectivity towards F[Formula: see text], CN[Formula: see text]and CH3COO[Formula: see text] by their changing of color from green or reddish-brown to dark reddish-brown. The complexes exclusively bind these three anions at their axial positions. The binding constant determination gives the number of binding species (n) >1 at less than one equivalent concentration of anions in the acetonitrile solution of the complex. A band appeared at around 735 nm, on the other hand, suggests that a bis(CN)-derivative of corrole complex could form under >1 equivalent anionic conditions. The limit of detection for the Co-4 was superior than Co-1 and Co-2, which were 0.0068 [Formula: see text]M for CN[Formula: see text], 0.0082 [Formula: see text]M for F[Formula: see text]and 0.0177 [Formula: see text]M for CH3COO[Formula: see text] ion. Although the complexes detect all three anions at less than 1 equivalent of the anion addition, the Co-1 and Co-2 are more selective towards CH3COO[Formula: see text]ion, whereas Co-4 selectively detects CN[Formula: see text]anion at larger equivalents of these anions.

Hydrogen bonding regulation enables indanthrone as a stable and high-rate cathode for lithium-ion batteries

Indanthrone (IDT) is an abundant and inexpensive industrial dyestuff containing two anthraquinone active units coupling through two imino (NH) groups. Intermolecular and intramolecular hydrogen bonds in IDTs can inhibit its dissolution in the electrolyte by facilitating molecular interactions and improve the cycling performance when using as cathode for lithium ion batteries. However, the intramolecular hydrogen bonds lead to inadequate utilization of the active units of IDT. We found that the addition of nitrate anion in the electrolyte can regulate the hydrogen bond pairings. On one hand, the nitrate anion activation contributes the oxidation of NH groups in IDT molecule, weakening the intramolecular hydrogen bonds and resulting in higher utilization of the active units. On the other hand, the alleviation of the intermolecular bonding induces the microexfoliation of closely stacked IDT bulk, which is conducive to improving the rate performance of the cells. As a result, the nitrate anion activated IDT cathode delivers a high voltage plateau (2.5 V), an initial discharge capacity of 226 mAh g−1 at 0.1 C that is close to its theoretical capacity. The rate capacity and cycling performance are also highly improved. The discharge capacity of the IDT cathode achieves 175 mAh g−1 at 2C in the electrolyte containing 1.0 wt% LiNO3, and maintains at 125 mAh g−1 after 1000 cycles. This may provide a new perspective for improving the performance of organic electrode materials by hydrogen bonding regulation.

Electrochemistry of Neodymium in an Equimolar NaCl-KCl Melt without and with Addition of Fluoride Ions

The paper presents results of neodymium electrochemical behavior in chloride and chloride-fluoride melts. It was shown that the process of neodymium electroreduction in the NaCl-KCl-NdCl3 melt proceeds in two stages. It was established by diagnostic criteria of voltammetry that the discharge process of Nd(III) to Nd(II) at a sweep rate in the range of 0.6 ≤ n ≤ 1.0 V s-1 is not complicated by reaction disproportionation. In this study diffusion coefficients, activation energy of diffusion for Nd(III) complexes and standard rate constants of charge transfer for the Nd(III)/Nd(II) redox couple in the NaCl-KCl melt were determined. It was shown that the addition of fluorine anions into the NaCl-KCl-NdCl3 melt leads to stabilization of the higher oxidation state of neodymium in chloride-fluoride melts and neodymium in the intermediate oxidation state +2 in these melts does not exist.

Ten-Step Total Synthesis of (-)-Andranginine.

The total synthesis of the indole alkaloid (-)-andranginine has been achieved in 10 steps. Key reactions of the synthesis include a nucleophilic addition of acetylenyl anion to chiral N-sulfinyl imine, an intramolecular N-alkylation reaction to close the C ring, and a dienyne metathesis cascade reaction to construct the DE rings. Meanwhile, 16-epi-(-)-andranginine was also obtained with the developed strategy.

Ion-/Thermo-Responsive fluorescent perylene-poly(ionic liquid) conjugates: One-pot microwave synthesis, self-aggregation and biological applications

This manuscript describes the attachment of alkylvinylimidazolium-based poly(ionic liquid) (PIL) to the imide positions of perylene bisimide (PBI) to introduce stimuli-responsiveness and to make the conjugate soluble in water and water-based mixed solvents with the possibilities of using them as a probe for imaging and diagnostics in biomedical domain. The alkylvinylimidazolium ionic liquid monomers (ILMs) are tailor-made and a one-step microwave-assisted method is employed for synthesizing the PBI-(Cys-PIL)2 conjugates by thiol-mediated radical polymerization of the ILMs using l-cysteine (Cys) with AIBN as initiator and in the presence of perylene-3,4,9,10-tetracarboxylic dianhydride (PDA). The introduction of PIL segment induces amphiphilicityto the conjugate, and it undergoes self-aggregation into vesicles in water and methanol/water mixture. Owing to the presence of PIL segments, the conjugates are responsive to anions forming insoluble spherical aggregates through the multipoint ionic crosslinking between the cationic PIL segments of neighbouring conjugate molecules in water and methanol/water mixture. The turbid color dispersion, containing spherical conjugate’s aggregates, shows upper critical solution temperature (UCST)-type phase transition to transparent solution upon heating. The variation of cloud point of conjugate could be done by changing different parameters such as molecular weight, nature of anions, and the length of the alkyl chain present in the PIL segment of the conjugate. The UV–vis and fluorescence spectra of the conjugate’s aggregates in solution change upon addition of anions. The monitoring of the spectral change upon heating due to disruption of aggregates allows us to determine the cloud point, which exactly matches with that obtain from turbidimetry. The water-soluble fluorescent PBI-(Cys-PIL)2 conjugate having cationic PIL segments shows low cytotoxicity and can be used in binding with ctDNA/plasmid DNA and imaging HeLa cells.

Efficient Synthesis of Orphaned Cyclopropanes Using Sulfones as Carbene Equivalents.

Small molecules containing 1,1-dimethylcyclopropanes are prevalent throughout nature but are difficult to synthesize using state-of-the-art metal-catalyzed carbene transfer methods without competing 1,2-hydride shifts. Herein, we introduce a mechanistically distinct platform to transfer 1,1-dialkylcarbene units to olefins using carbometalation reactions of dialkyl sulfonyl anions. In the presence of NaNH2 or n-BuLi in ethereal solvents, dialkyl sulfones react with styrenes and arylbutadienes between 23 and 70 °C to produce the corresponding 1,1-dialkylcyclopropanes. We report 40 examples of this reactivity including 16 different styrenes (up to 89% isolated yield), 9 arylbutadienes (51-88% yield), and 13 different sulfones (46-80% yield). In addition, we report an example of a sequential cyclopropanation reaction using this method. Preliminary mechanistic studies suggest a stepwise anionic process that is initiated by the direct addition of sulfonyl anions to a carbon-carbon double bond.

Mechanism of the phosphine‐catalyzed [3 + 3] annulation with MBH carbonates as the potential dipoles

AbstractThe [3 + 3] cylcloaddition/annulation is an important complementary for construction of six‐membered ring. With addition of organophosphine to the Morita‐Baylis‐Hillman (MBH) carbonate, a potential C3 synthon can be furnished. In this work, the catalytic mechanisms for using this synthon as the nucleophilic or electrophilic dipole to react with the cyclohexa‐2,5‐dienone‐substituted benzenesulfonamide are studied by the density functional theory method. The computational results reveal that the nucleophilic addition of the amide anion to the allylic phosphonium is more favorable than the electrophilic addition of alkenyl in the benzenesulfonamide with the allylic phosphorus ylide. Namely, the allylic phosphonium adduct, rather than the allylic phosphorus ylide that is generated by deprotonation of the allylic phosphonium, is more likely to act as the potential dipole. The global reactivity index calculations indicate that species involved in the favored pathway have better reactivities (both in nucleophilicity and electrophilicity), especially the significantly higher nucleophilicity of the amide anion.

Effect of Surface‐Adsorbed and Intercalated (Oxy)anions on the Oxygen Evolution Reaction

AbstractAs the kinetically demanding oxygen evolution reaction (OER) is crucial for the decarbonization of our society, a wide range of (pre)catalysts with various non‐active‐site elements (e.g., Mo, S, Se, N, P, C, Si…) have been investigated. Thermodynamics dictate that these elements oxidize during industrial operation. The formed oxyanions are water soluble and thus predominantly leach in a reconstruction process. Nevertheless, recently, it was unveiled that these thermodynamically stable (oxy)anions can adsorb on the surface or intercalate in the interlayer space of the active catalyst. There, they tune the electronic properties of the active sites and can interact with the reaction intermediates, changing the OER kinetics and potentially breaking the persisting OER *OH/*OOH scaling relations. Thus, the addition of (oxy)anions to the electrolyte opens a new design dimension for OER catalysis and the herein discussed observations deepen the understanding of the role of anions in the OER.

Effect of Surface-Adsorbed and Intercalated (Oxy)anions on the Oxygen Evolution Reaction.

As the kinetically demanding oxygen evolution reaction (OER) is crucial for the decarbonization of our society, a wide range of (pre)catalysts with various non‐active‐site elements (e.g., Mo, S, Se, N, P, C, Si…) have been investigated. Thermodynamics dictate that these elements oxidize during industrial operation. The formed oxyanions are water soluble and thus predominantly leach in a reconstruction process. Nevertheless, recently, it was unveiled that these thermodynamically stable (oxy)anions can adsorb on the surface or intercalate in the interlayer space of the active catalyst. There, they tune the electronic properties of the active sites and can interact with the reaction intermediates, changing the OER kinetics and potentially breaking the persisting OER *OH/*OOH scaling relations. Thus, the addition of (oxy)anions to the electrolyte opens a new design dimension for OER catalysis and the herein discussed observations deepen the understanding of the role of anions in the OER.

The aqueous chemistry of the copper-ammonia system and its implications for the sustainable recovery of copper

The dissolution of copper during the leaching of chalcopyrite in ammonia solutions is an attractive alternative to acid sulfate leaching in the treatment of ores with high consumption of acid. Despite considerable research into this complex leaching system, a lack of understanding of the fundamental chemical drivers has delayed the implementation of the ammonia process. In the present study, various ammonium salts solutions (chloride, sulfate, carbonate) have been used to study the effect of ion association on the dissociation constant of the ammonium ion at temperatures of 25 and 35 °C. Experimental and calculated solubilities of Cu 2+ have been obtained under different conditions and plotted in speciation distribution diagrams, in other to assess the accuracy of predictions using available thermodynamic properties. Ion association was found to significantly affect the dissociation constant of the ammonium ion in solutions containing sulfate, chloride and carbonate anions; thus, influencing the free ammonia concentration in solution. Increasing temperature from 25 to 35 °C was found to decrease the dissociation constant of the ammonium ion. These findings highlight the importance of using the correct anionic ligands for the ammonium ions and temperature in order to obtain high dissolution of copper. It has been established that solubility of copper in ammonia solution is affected by the anionic ligands, temperature and addition of chloride ions. The NH 3 ligand forms strong coordination compounds with cupric or cuprous ions depending on the anionic ligand, generating an increase in solubility between pH 8.5 and 10.0. The present study, therefore, identifies important constraints on the role of varying anion associated with ammonia, temperature, pH, and addition of chloride ions and the inter-dependence of these factors in controlling Cu 2+ solubility in ammoniacal systems. The results from the present study provides experimental pKa values and solubility constants of the various ammoniacal systems to provide commercial processing via ammoniacal routes the optimal conditions in which to maximise Cu recovery and maintain free ammonia at levels to minimise volatility and loss. The findings are directly beneficial to future commercial application employing effective ammonium-anion lixiviant strategies in the sustainable recovery of Cu. • Ion association affect pKa of the ammonium ion in solutions containing sulfate, chloride and carbonate anions. • Solubility of copper in ammonia solution is affected by the anionic ligands, temperature, and addition of chloride ions. • The findings are beneficial to commercial application employing ammonium-anion lixiviant in the sustainable recovery of Cu.

A Benzothidiazole-Based Reversible Fluorescent Probe with Excellent Performances in Selectively and Sensitively Sensing of Hg2+ in Water

The development of mercury ion selective fluorescent probe is significant because it is one of toxic heavy metals and poses great risks and hazards to human health. Herein, we develop a mercury ion-selective fluorescent probe, namely IB, based on imidazole decorated benzothiadiazole that obtained by a facile palladium catalytic C-N coupling reaction. IB exhibits high selectivity and sensitivity towards mercury ion in water with nearly 32-fold fluorescent enhancement. The detection limit is calculated to be 0.93 nmol/L. In addition, the sensing of mercury ion can be conducted in a wide pH scope ranging from 4.0 to 10.0. Subsequently, the mercury ion elicits fluorescence of IB solution can be quenched by the addition of cyanide anions, showing "off-on-off" fluorescence transformation with at least 5 cycles, demonstrating the reversible sensing ability of IB. Furthermore, an INHIBIT logical detector has been developed using mercury ion and cyanide anions as inputs and fluorescence of IB as output. Significantly, IB can be utilized for mercury ion detection in real water sample.