Supramolecular assembly of melamine and its derivatives: nanostructures to functional materials

Roy, Bappaditya; Bairi, Partha; Nandi, Arun K.

doi:10.1039/c3ra44524k

Cited by 111 publications

(86 citation statements)

References 162 publications

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“…5 The second molecule is chosen in such a way so that it can easily form stable hydrogen-bonded motif. 5 The second molecule is chosen in such a way so that it can easily form stable hydrogen-bonded motif.…”

Section: Introductionmentioning

confidence: 99%

A two-component hydrogelator from citrazinic acid and melamine: synthesis, intriguing role of reaction parameters and iodine adsorption study

et al. 2015

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Herein, we have implemented an intimate grinding-mixing protocol (GMP) for the synthesis of a new hydrogelator from citrazinic acid and melamine. Ground mixture upon sonication, just for few second, in a suitable solvent/mixed-solvent system finally results in a gel matrix.Citrazinic acid, is decorated with ureidopyrimidone functionality and melamine is enriched with amino-pyridine functionality. Therefore, the necessary non-covalent interactions (like hydrogen bonding and π-π stacking) become a part-and-parcel, bringing a nanofibrous gel material in existence. A thorough and complete solvent dependent gelation investigation suggests that water must be present as the sole solvent or one of the members of other mixedsolvent system to successfully result in gel formation. The gel shows entangled network morphology. Different micro-analytical studies (FTIR, Powder XRD, FESEM, TEM, Rheology etc.) have been conducted for complete characterizations of the gel sample. The gel also exhibits its stimuli responsive behaviour towards different interfering chemical parameters like pH, selective anions etc. Again, it is worth mentioning that here GMP plays a key role to strongly initiate and improvise solid state self-assembly. Different non-covalent interactions procure the suitable hydrogen-bonded motif which presumably propagates upon activation in solution phase after mild sonication favouring spontaneous formation of fibrous architectures. It was also noticed that without grinding, the solid state interactions are jeopardized and only partial gel structure prevails. Finally the available porosity in the gel framework and the enriched π-electron density within, make the gel a suitable host for adsorption of guest molecules. This information provoked us to study the reversible adsorption-desorption equilibrium of molecular iodine within the dried-gel matrix. The guest, iodine entrapment into the host occurs both from the solution and also from gas phase iodine.The complete analysis suggests that our material presents a high storage capacity of this halogen species. Therefore the study prescribes that the synthesized hydrogel material could be a suitable candidate for application in synthetic organic chemistry and would find an avenue to solve other environmental issues also.Melamine and citrazinic acid, upon solid state grinding, produced a two-component gelator

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Section: Introductionmentioning

confidence: 99%

A two-component hydrogelator from citrazinic acid and melamine: synthesis, intriguing role of reaction parameters and iodine adsorption study

et al. 2015

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“…The cyclic (Figure c) and differential pulse (Figure d) voltammograms of the propranolol enantiomers on these electrodes differ among themselves. The linear range of detectable concentrations is 0.026–0.86 mM (Figure ).This is due to the fact that melamine and cyanuric acid molecules can form supramolecular structures that exhibit the properties of chiral selectors. A similar effect was observed in the voltammograms of propranolol enantiomers registered on a CPE modified with uracil .…”

Section: Resultsmentioning

confidence: 99%

A Voltammetric Sensory System for Recognition of Propranolol Enantiomers Based on Glassy Carbon Electrodes Modified by Polyarylenephthalide Composites of Melamine and Cyanuric Acid

et al. 2017

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An enantioselective voltammetric sensory system based on glassy carbon electrodes modified by polyarylenephthalide composites of melamine and cyanuric acid using chemometric method principal component analysis for the recognition of propranolol enantiomers was developed. It is shown that glassy carbon electrodes modified by polyarylenephthalide composites of melamine and cyanuric acid exhibit the properties of enantioselective sensors. The molecular dynamics simulations of the interaction processes of propranolol enantiomers with polyarylenephthalide composites of melamine and cyanuric acid show that the differences between the voltammograms of propranolol enantiomers on such electrodes are due to differences in the energy of hydrogen bonds formation between enantiomeric molecules and supramolecules of melamine and cyanuric acid. This is reflected not only in the characteristics and shape of the voltammograms, but also in the sensitivity of the electrodes, with respect to the propranolol enantiomers. The possibilities of the sensory system for express recognition of R‐ and S‐propranolol are considered. The recognition of these enantiomers by the registered voltammograms on two glassy carbon electrodes modified by polyarylenephthalide composites of melamine and cyanuric acid allows to increase significantly the percentage of correctly recognised samples in comparison with the registration of voltammograms on only one electrode.

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“…In an illustrative example, melamine [17,22], a H-bonded molecule with threefold symmetry, was assembled together with perylene tetracarboxylic diimide (PTCDI) [23]. These molecules interact strongly via complementary triple H-bonds.…”

Section: Two-dimensional Hydrogen Bonded Nanoporous Networkmentioning

confidence: 99%

Hydrogen Bonding in Supramolecular Nanoporous Materials

Kuringen¹,

Schenning

2015

Lecture Notes in Chemistry

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This chapter provides an overview of the use of hydrogen bonds for the construction of nanoporous materials. These materials attract a great deal of interest because of their large surface area to volume ratio and their applications in areas such as filtration, separation, adsorption, catalysis, and ion conduction. Organic materials are especially appealing for these applications, because their properties can be tailored. The use of supramolecular interactions is required to control the organization of materials at the molecular level. Hydrogen bonds are ideal supramolecular interactions for the construction of these nanoporous materials, thanks to their directionality and reversibility. The directionality causes the positioning molecules in such a way that voids have been created in between the molecules, such as in two-and three-dimensional hydrogen bonded organic frameworks. In a second approach, hydrogen bonded template molecules have been removed from a polymer to create pores. This method is successfully applied to hydrogen bonded block copolymers and liquid crystalline polymers.

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Supramolecular assembly of melamine and its derivatives: nanostructures to functional materials

Cited by 111 publications

References 162 publications

A two-component hydrogelator from citrazinic acid and melamine: synthesis, intriguing role of reaction parameters and iodine adsorption study

A two-component hydrogelator from citrazinic acid and melamine: synthesis, intriguing role of reaction parameters and iodine adsorption study

A Voltammetric Sensory System for Recognition of Propranolol Enantiomers Based on Glassy Carbon Electrodes Modified by Polyarylenephthalide Composites of Melamine and Cyanuric Acid

Hydrogen Bonding in Supramolecular Nanoporous Materials

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