Browsing by Author "Rajlaxmi"

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A hydrogen bond cross-linked luminescent supramolecular network polymer and its application for the detection of alkyl iodides with differentiation capabilities from aromatic iodides
(Royal Society of Chemistry, 2021) Ravi Prakash Behere; Rajlaxmi; Neelam Gupta; Susmita Roy; Ram Nayan Gautam; Manoj Kumar Bharty; Chanchal Chakroborty; Biplab Kumar Kuila
Here, we have demonstrated a luminescent network polymer through a H-bond cross-linking strategy by connecting poly(4-vinyl pyridine) chains with perylene diimide (PDI) cross-linker. The formation of a network structure through hydrogen bonding is successfully proved from the combined study of FTIR, NMR, XRD, and viscosity. The XRD study indicates improved crystallinity with an increased number of sharp reflection peaks, whereas the AFM study reveals self assembly into fibrils and sphere-like nanostructures. These network polymers have been used for the first time for fluorometric detection of a range of commonly employed alkylating agents at low concentrations. Interestingly, the network polymer can also differentiate between alkyl iodides and aromatic iodides. © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2021.
Polymer nanocomposite membranes and their application for flow catalysis and photocatalytic degradation of organic pollutants
(Elsevier Ltd, 2021) Rajlaxmi; Neelam Gupta; Ravi Prakash Behere; Rama Kanta Layek; Biplab Kumar Kuila
The modern world essentially needs a chemical industry that can operate with reduced production costs, and produce high-quality products with low environmental impact. The polymer nanocomposite-based flow catalytic membrane reactor where the reaction and separation can be amalgamated in one unit is considered as one of the new alternative solutions to solve these problems. In this review, we have discussed state-of-the-art flow-through catalytic reactors based on polymer nanocomposite membranes. The unique advantages of flow catalysis include uninterrupted operation, good recyclability, and reaction product without contamination that leads to simple purification. Various catalytic model reactions such as coupling, hydrogenation, esterification in the flow system are presented. We have also presented an overview of methods adopted for preparing such nanocomposite membranes. In the last section, a discussion has been made on the recent advances on polymer-based nanocomposite membranes for the degradation and separation of organic pollutants. © 2021 Elsevier Ltd