Sugar‐Derived Phase‐Selective Molecular Gelators as Model Solidifiers for Oil Spills

Jadhav, Swapnil R.; Vemula, Praveen Kumar; Kumar, Rakesh; Raghavan, Srinivasa R.; John, George

doi:10.1002/anie.201002095

Cited by 338 publications

(176 citation statements)

References 16 publications

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“…We now added a fifth design principle 25 : 5) use a catalyst to enhance the rate of the final bond forming reaction leading to formation of the assembling molecule. To various degrees, these principles have been applied to controlling self-assembly through enzymatic catalysis 26,27,28,29,30,31 and synthetic catalysis 32,33 . Figure 1.…”

Section: Concept and Motivationmentioning

confidence: 99%

Catalysis of Supramolecular Hydrogelation

et al. 2016

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CONSPECTUSOne often thinks of catalysts as chemical tools to speed up a reaction, or to have a reaction run under more benign conditions. As such, catalysis has a role to play in the chemical industry and in lab scale synthesis that is not to be underestimated. Still, the role of catalysis in living systems (cells, organisms) is much more extensive, ranging from the formation and breakdown of small molecules and biopolymers, to controlling signal transduction cascades and feedback processes, motility and mechanical action. Such phenomena are only recently starting to receive attention in synthetic materials and chemical systems. 'Smart' soft materials could find many important applications ranging from personalized therapeutics to soft robotics, to name but a few. Until recently, approaches to controlling the properties of such materials were largely dominated by thermodynamics, for instance looking at phase behavior and interaction strength. However, kinetics play a large role in determining the behavior of such soft materials, for instance in the formation of kinetically trapped (metastable) states, or the dynamics of component exchange. As catalysts can change the rate of a chemical reaction, catalysis could be used to control the formation, dynamics and fate of supramolecular structures, when the molecules making up these structures contain chemical bonds whose formation or exchange are susceptible to catalysis. In this Account, we describe our efforts to use synthetic catalysts to control the properties of supramolecular hydrogels. Building on the concept of synthesizing the assembling molecule in the self-assembly medium from non-assembling precursors, we will introduce the use of catalysis to change the kinetics of assembler formation, and thereby the properties of the resulting material. In particular, we will focus on the synthesis of supramolecular hydrogels where the use of a catalyst provides access to gel materials with vastly different appearance and mechanical properties, or controls localized gel formation and the growth of gel objects. As such, catalysis will be applied to create molecular materials that exist outside of chemical equilibrium. In all, using catalysts to control the properties of soft materials constitutes a new avenue for catalysis, far beyond the traditional use in industrial and lab scale synthesis.

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Section: Concept and Motivationmentioning

confidence: 99%

Catalysis of Supramolecular Hydrogelation

et al. 2016

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“…Furthermore, LMMGs-based gel emulsions and supramolecular gel films have also been reported during the past few years [28][29][30]. These unusual gelation behaviors of LMMGs may bring new possibilities for their real-life applications in many areas, such as the mild and efficient separation of oil/water mixtures, purification of water contaminated by dye or some other organic chemicals [31][32][33][34], and template preparation of low-density materials, etc. [35].…”

Section: Introductionmentioning

confidence: 95%

Progress in the studies of low-molecular mass gelators with unusual properties

Liu

Fang

2011

Sci. China Chem.

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This article is intended to provide an overview of recent progress in the studies of cholesterol-based low-molecular mass gelators (LMMGs) with unusual properties, in particular, gelation and selective gelation at room temperature, gel emulsions and gel film formation, etc. Potential applications of the LMMGs in spilled oil collection and water purification are briefly presented.gelation at room temperature, selective gelation, gel emulsions, gel films

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“…When dispersed in aqueous solution at room temperature, this material forms fibrous aggregation and nanotubular structures [11]. Although related literature on further practical application of cardanol-based glycolipids is absent, its selfassembling properties have promoted the synthesis of several glycolipids such as monosaccharide esters with diamino-aromatic linkers [12], amygdalin-based esters [13] and dialkanoate derivative of sugar alcohols [14]. Unlike the carbon nanotubes (CNTs), organic nanotubes have excellent dispersibility in water and incorporate guest substance of over 10 nm in size, such as nucleic acids and proteins [15].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of nanoarchitectures from fatty acid derivatives of 2,6-diaminopyridine and 2-aminopyridine

Hassan

Rauf

2014

J Nanostruct Chem

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The self-assembling property of lipids makes it an important building block in the field of supramolecular nanoarchitectures with a variety of applications in chemistry, biochemistry, materials science and medicine. We report here, the synthesis and formation of variety of nanostructures such as nanosheets, nanofibers and nanotubes of fatty acid derivatives of 2,6-diaminopyridine and 2-aminopyridine. These molecules possess a saturated or unsaturated long alkyl-chain group as the self-assembling unit. The molecular recognition property of diaminopyridine linker as a result of H-bonding was confirmed by 1 H-NMR and fluorescence spectroscopy and it plays an important role in monitoring the chemical selectivity of supramolecular aggregates toward guest binding. The chemical structures were characterized by Fourier transform-infrared, 1 H-NMR, 13 C-NMR, mass spectra, whereas the morphologies were imaged using scanning electron microscopy and transmission electron microscopy.

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Sugar‐Derived Phase‐Selective Molecular Gelators as Model Solidifiers for Oil Spills

Cited by 338 publications

References 16 publications

Catalysis of Supramolecular Hydrogelation

Catalysis of Supramolecular Hydrogelation

Progress in the studies of low-molecular mass gelators with unusual properties

Synthesis and characterization of nanoarchitectures from fatty acid derivatives of 2,6-diaminopyridine and 2-aminopyridine

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