Anion triggered metallogels: demetalation and crystal growth inside the gel matrix and improvement in viscoelastic properties using Au-NPs

Biswas, Arnab; Dubey, Mrigendra; Mukhopadhyay, Sujay; Kumar, Ashish; Pandey, Daya Shankar

doi:10.1039/c5sm02464a

Cited by 22 publications

(24 citation statements)

References 46 publications

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“…Moreover, a decrease in the negative gradient of complex viscosity (η*) also confirms the strengthening of the hydrogel after the incorporation of the antibiotic NFT (Figure 9b). 74,76 These results thus confirm the stable nature of the L3@NFT-doped gel. 91 It is noteworthy that the L3@NFT gel does not release the doped antibiotic if the gel is suspended in water for 24 h. Such a fact not only implies the efficient binding of NFT with L3 in the resultant gel network (cf.…”

Section: ■ Introductionsupporting

confidence: 75%

Systematic Design of a Low-Molecular-Weight Gelator and Its Application in the Sensing and Retention of Residual Antibiotics

Goyal

Pachisia

Gupta

2020

Crystal Growth & Design

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This work presents stepwise design and synthesis of a set of amide-based compounds, L1−L3, assisted by the crystal engineering approach. Out of the three compounds, L3 successfully acted as a low-molecular-weight gelator (LMWG) and formed a gel that was characterized using an array of spectroscopic, rheological, and microscopic imaging techniques. LMWG L3 was used for the nanomolar sensing of a few antibiotics while it also formed stable gel with them. The L3@antibiotic gel was found to hold an antibiotic effectively within its fibrous network, thus creating potential opportunities for the removal of residual antibiotics from contaminated sources.

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Section: ■ Introductionsupporting

confidence: 75%

Systematic Design of a Low-Molecular-Weight Gelator and Its Application in the Sensing and Retention of Residual Antibiotics

Goyal

Pachisia

Gupta

2020

Crystal Growth & Design

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“…Contextually, the average dimension for ZTP2G fibers was reported to be ∼30 nm. 61 Further, fluorescence microscopy images suggested that the synthesized CLMG fibers along with ZTP2G are fluorescent in nature and emit brightly under blue, green, or red filters ( Figure 2 ).…”

Section: Resultsmentioning

confidence: 96%

“…The average lifetime for ZTP2G has been calculated to be 2.93 ns. 61 Again, similar measurements have been made on luminogens L-1–L-3 exclusively, and thereafter, a comparative analysis has been performed to realize the interaction between the components in the hybrid systems (CLMGs). It has been found that τ av of L-1 (3.54 ns) is greater than those of L-2 (3.45 ns) and L-3 (2.76 ns) ( Figure S7 ), but all of these are much lower with respect to CLMGs.…”

Section: Resultsmentioning

confidence: 99%

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Manipulating Metallogel Properties by Luminogens and Their Applications in Cell Imaging

et al. 2018

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Manipulating gelation properties of the isomeric zinc–terpyridine complexes C-1 (nongelator) and C-2 (gelator) using three different luminescent dyes, viz., acridine yellow (AY), ethidium bromide (EB), and azido-boron dipyrromethene, have been described. Hybrid gels created by the combination of C-1, C-2, and above-mentioned dyes have been termed complex-luminogen mixed gels (CLMGs). Ensuing CLMGs have been thoroughly characterized by spectral, morphological, and rheological studies. Cytotoxicity measurements and imaging against breast cancer cell line MDA-MB-231 unveiled that three out of the five CLMGs can be effectively used for cell imaging. Interestingly, direct use of the metal-containing hybrid gels for live cell imaging which is a distinctive approach, has been successfully achieved with significantly encouraging results.

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“…25,26 In many instances, the presence of a particular cation or anion or a chemical substance influences the network structure in a great way to bring about significant changes in the associated properties. 27,28 This characteristic of a soft material to discriminate a particular entity from similar other motifs can endow special power to the material for enormous sensing capacity. There are several reports where LMWGs can sense different cations and anions in the gel state particularly with the help of a drastic change in the aggregateinduced emission property.…”

Section: ■ Introductionmentioning

confidence: 99%

Discotic Organic Gelators in Ion Sensing, Metallogel Formation, and Bioinspired Catalysis

et al. 2018

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Two organogelators G2 and G3 with a carboxamide group have been synthesized and characterized with different spectroscopic tools. Dimethylformamide or dimethyl sulfoxide solutions of both the compounds upon the addition of a minute quantity of water show the tendency to form gels. Supramolecular self-assembly for gel formation paves the way for aggregation-induced emission enhancement (AIEE) phenomena for both the gelator molecules. Introduction of metal ions in organogels strengthens the gel property without much affecting the fluorescence behavior. However, the introduction of Ag, Fe, and Fe ions in the G2 organogel separately results in total quenching of AIEE, making it possible to sense that particular cation in the gel state. The G3 organogel shows a similar behavior with the Fe ion. Remarkably, other metallogels such as Ni(II)G2 and Co(II)G2 can sense sulfide ion and Cu(II)G2 can sense iodide ion by switching off the fluorescence even in multianalyte conditions. Furthermore, the copper-based metallogel Cu(II)G2 can be utilized as a catalyst and reaction medium for aerobic oxidation of catechol to quinone. To the best of our knowledge, this is the first attempt known so far to utilize a metallogel material for bioinspired catalysis such as catechol oxidation.

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Anion triggered metallogels: demetalation and crystal growth inside the gel matrix and improvement in viscoelastic properties using Au-NPs

Cited by 22 publications

References 46 publications

Systematic Design of a Low-Molecular-Weight Gelator and Its Application in the Sensing and Retention of Residual Antibiotics

Systematic Design of a Low-Molecular-Weight Gelator and Its Application in the Sensing and Retention of Residual Antibiotics

Manipulating Metallogel Properties by Luminogens and Their Applications in Cell Imaging

Discotic Organic Gelators in Ion Sensing, Metallogel Formation, and Bioinspired Catalysis

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