Indian Institute of Technology Ropar

About: Indian Institute of Technology Ropar is a education organization based out in Ropar, India. It is known for research contribution in the topics: Catalysis & Computer science. The organization has 1014 authors who have published 2878 publications receiving 35715 citations.

A novel phthalazine based highly selective chromogenic and fluorogenic chemosensor for Co2+ in semi-aqueous medium: application in cancer cell imaging

Abstract: A new phthalazine based chemosensor 3 was developed for the highly selective and sensitive detection of Co2+ in the mixed solvent system, CH3CN–H2O (1 : 1, v/v). In the presence of Co2+, the colour of the solution 3 changed from yellow to green; the absorption maxima of 3 was red-shifted from 383 nm to 435 nm, and the fluorescence of 3 at 550 nm was significantly enhanced. The sensor 3 showed a detection limit down to 25 nM by forming a complex species with Co2+ in 1 : 1 stoichiometry. Furthermore, by means of confocal laser scanning microscopy experiments, it has demonstrated that it can be used as a fluorescent probe for monitoring Co2+ in living cells.

Coumarin–derived Organosilatranes: Functionalization at magnetic silica surface and selective recognition of Hg2+ ion

Abstract: This article features the first synthesis of coumarin based triazole linked organosilatranes (3–5) derived from terminal alkyne (1) via click methodology. The coumarin tethered organosilatranyl moiety was anchored on magnetic silica surface and was well characterized by numerous spectroscopic and analytical techniques. The resultant hybrid nanoparticles have been characterized in detail by FTIR, UV–vis spectroscopy, Photoluminiscence (P.L), SEM, TEM, XRD, EDX and TGA. The silatranes (3–5) were then assessed for their metal ion binding properties using absorption and emission spectra. It was observed that the synthesized compounds showed significant selectivity for Hg (II). In addition, the interacting ability of coumarin based derivatives was investigated at different pH values and the pH 9 was considered to be the most favorable pH for fluorometric analysis. Importantly, the hybrid nanoparticles possessed enhanced sensorial ability towards Hg2+ ion and these findings were affirmed using stern volmer equation. In addition, the complexation mode of silatrane (3) with Hg2+ ion was also elucidated by computational analysis using DFT study.

Challenges and prospects in the selective photoreduction of CO₂ to C1 and C2 products with nanostructured materials: a review

Abstract: Solar fuel generation through CO2 hydrogenation is the ultimate strategy to produce sustainable energy sources and alleviate global warming. The photocatalytic CO2 conversion process resembles natural photosynthesis, which regulates the ecological systems of the earth. Currently, most of the work in this field has been focused on boosting efficiency rather than controlling the distribution of products. The structural architecture of the semiconductor photocatalyst, CO2 photoreduction process, product analysis, and elucidating the CO2 photoreduction mechanism are the key features of the photoreduction of CO2 to generate C1 and C2 based hydrocarbon fuels. The selectivity of C1 and C2 products during the photocatalytic CO2 reduction have been ameliorated by suitable photocatalyst design, co-catalyst, defect states, and the impacts of the surface polarisation state, etc. Monitoring product selectivity allows the establishment of an appropriate strategy to generate a more reduced state of a hydrocarbon, such as CH4 or higher carbon (C2) products. This article concentrates on studies that demonstrate the production of C1 and C2 products during CO2 photoreduction using H2O or H2 as an electron and proton source. Finally, it highlights unresolved difficulties in achieving high selectivity and photoconversion efficiency of CO2 in C1 and C2 products over various nanostructured materials.