New Hg(<scp>ii</scp>) coordination polymers based on a thioimidazole ligand with good performance to detoxify Hg(<scp>ii</scp>) and reversibly capture iodine

Bahrani‐Pour, Maryam; Beheshti, Azizolla; Sedaghat, Tahereh; Hoveizi, Elham; Naseri, Nadieh; Mayer, Péter; Centore, Roberto

doi:10.1039/d2dt03057h

Cited by 6 publications

(3 citation statements)

References 82 publications

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“…The process of iodine uptake can be explained by the strong binding interactions between the CS groups of the linker [nb (HOMO)] as the Lewis base and the iodine molecule [σ*u(p)(LUMO)] as the Lewis acid. − Overall, the high adsorption capacity of GOF-L S was achieved through CT interactions between iodine molecules and the sulfur atoms of L S , which play a crucial role in the uptake process (Scheme ).…”

Section: Resultsmentioning

confidence: 99%

Nanoarchitectured Graphene Organic Frameworks with High Iodine Uptake and Antibacterial Activity

Naseri,

Azadi,

Motamedi

et al. 2024

ACS Appl. Nano Mater.

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In the present study, a graphene organic framework (GOF-L S ) was successfully prepared by cross-linking nanosheets of graphene oxide (GO) with dimethyl-4,4′-(methylenebis (2-thioxo-2,3-dihydro-1H-imidazole-3,1-diyl)) dibutyrate (L S ) as a pillaring agent via a transesterification process. GOF-L S have been characterized by various analyses, such as Fourier transform infrared, BET, powder X-ray diffraction, energy-dispersive X-ray, thermogravimetric analysis, and FE-SEM. The oxygenic functional groups in GO and the sulfur atoms of L S give mesoporous GOF-L S a strong affinity for iodine molecules due to the formation of charge-transfer complexes between the host framework's sulfur and oxygen atoms and the guest iodine molecules. Therefore, GOF-L S exhibited a high adsorption capacity of 1315.105 mg/g for removing iodine from the iodine/ cyclohexane solution. In addition, GOF-L S also displayed extraordinary stability toward iodine, with an excellent capacity of 232 wt % for volatile iodine. To the best of our knowledge, this is the first report aiming at iodine uptake with a GOF built on a thioamidebased ligand. This study also aimed to investigate the antibacterial properties of GOF-L S . The antibacterial activity of GOF-L suspensions (80 μg/mL) was tested against four species of bacteria, including two Gram-negative (Escherichia coli, Pseudomonas aeruginosa) and two Gram-positive (Bacillus subtilis, Staphylococcus aureus). The results indicated that the GOF-L S were effective against all bacterial species, with especially remarkable growth inhibition against Gram-positive bacteria. In addition, GOF-L S demonstrated promising results in controlling antibiotic-resistant strains of E. coli and S. aureus in the environment. This study will contribute to the development of a cost-effective, metal-free, stable, and environmentally friendly multifunctional framework for the remediation of iodine-containing pollutants and the control of bacterial infections, addressing critical needs in environmental protection and public health.

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Section: Resultsmentioning

confidence: 99%

Nanoarchitectured Graphene Organic Frameworks with High Iodine Uptake and Antibacterial Activity

Naseri,

Azadi,

Motamedi

et al. 2024

ACS Appl. Nano Mater.

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“…The Hg-N, Hg-Cl and Hg-Br bond lengths are within the typical ranges. [96][97][98][99] The selected bond distances and angles for CP1 and CP2 are listed in Tables S1 and S2, ESI. † The geometry of the four-coordinate metal centers can be described by an angular index (τ 4 ) parameter, which was defined by Houser and co-workers 100 as follows (eqn (1)): The τ 4 values for the Hg center were found to be 0.800 and 0.807 for CP1 and CP2, respectively (Tables S1 and S2, ESI †).…”

Section: Synthesismentioning

confidence: 99%

Reversible anion-dependent iodine uptake in nonporous pseudopolymorphic coordination polymers

Khorshidi,

Notash,

Kubicki

2024

CrystEngComm

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“…The dithione ligands are capable to generate coordination networks with coinage metal salts such as silver(I) and gold(I), but also with other metal ions, such as cadmium(II) and mercury(II), which have demonstrated the ability to capture organic pollutants, inorganic toxins, including iodine and heavy metals. − In these cases, the counteranion can be halides, pseudohalides, trifluoroacetate, perchlorate, dichromate, nitrate, or a mixture of these anions. Recently, the R(CS)–(CH 2 ) m –(SC)R ligands ( m = 2, 5) has been used to construct various coordination networks, which demonstrated the capacity to selectively capture and separate gases. , The general conclusion resulting from these investigations, and therefore the intrinsic characteristics of these coordination networks, are inherently a function of the metal ion and its corresponding counteranion, as well as the number of methylene groups within the chain, m. However, the list of coordination networks investigated so far appears to be rather heterogeneous comparative to the rather rich thioether counter-parts. , This paucity precludes reliably establishing structure–property trends, and thus the reasons rationalizing the experimental outcomes.…”

Section: Introductionmentioning

confidence: 99%

Important Counteranion Effect on Adsorption Efficacity of Hydrogen Sulfide by Silver(I)-Dithione Coordination Polymers

Soleymani-Babadi,

Salahshournia,

Beheshti

et al. 2024

ACS Appl. Mater. Interfaces

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Four new coordination polymers (CPs) have been prepared and evaluated for their efficacy in adsorbing hydrogen sulfide. The reactions of the structurally flexible assembling dithione ligand, L, with different silver(I) salts lead to four new metal–organic coordination architectures (CPs I, III, V, and VIII) exhibiting either one- or two-dimensional networks. CP I, 2D-[(Ag2Cl2)L] n , exhibits a linear series of rhomboid (S)2Ag(μ2-Cl)2Ag(S)2 secondary building units (SBUs) where S is one of the thione functions of L, altogether forming a 2D-network. CP III, 2D-[(AgI)L] n , is built upon parallel staircase-shaped 1D-[Ag2(μ3-I)2] n SBUs bridged by S atoms of L that form a 2D-grid. CP V, 2D-[(AgL)(NO3)] n , presents parallel 1D-folded S-shaped [AgL] n + chains linked by strong argentophilic Ag···Ag interactions, forming a 2D-scaffolding. CP VIII, 1D-[(Ag2 L 3)(Cr2O7)] n , shows 1D-zigzag [{Ag(η2-μ2,η-μ,μ-L)}2] n 2n+ chains accompanied by Cr2O7 2– counteranions. The adsorption isotherms of H2S gas by these new CPs were examined and compared to those of related CPs [(Ag2Br2)L] n (II), [(AgCN)4 L] n (IV), [(Ag2 L)(CF3SO3)2] n (VI), and [(Ag2 L)(NO3)(ClO4)] n (VII). Among the tested polymers, the 3D-CP IV featuring cyanide anions exhibits the highest adsorption capacity of the CPs studied in this work. In order to determine the reason for this marked difference, density functional theory (DFT) computations were used. All in all, it turns out that the electrostatic interactions (CN–···H-SH) are significantly stronger than the O–···H-SH ones. This investigation provides a valuable conceptual tool for other designs of CPs and MOFs having the purpose of capturing toxic gases.

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New Hg(ii) coordination polymers based on a thioimidazole ligand with good performance to detoxify Hg(ii) and reversibly capture iodine

Abstract: In the current paper, we have successfully synthesized three new mercury coordination polymers with fascinating structures and properties via a flexible sulfur donor ligand, namely, {[Hg(µ2-Cl)(µ2-Ls)]}n[BF4]n (1), {[Hg(µ2-Cl)(µ2-Ls)]}n[ClO4]n (2), and...

Cited by 6 publications

References 82 publications

Nanoarchitectured Graphene Organic Frameworks with High Iodine Uptake and Antibacterial Activity

Nanoarchitectured Graphene Organic Frameworks with High Iodine Uptake and Antibacterial Activity

Reversible anion-dependent iodine uptake in nonporous pseudopolymorphic coordination polymers

Important Counteranion Effect on Adsorption Efficacity of Hydrogen Sulfide by Silver(I)-Dithione Coordination Polymers

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