A5035308413- Molecular Sensors and Ion Detection
- Luminescence and Fluorescent Materials
- Advanced biosensing and bioanalysis techniques
- Analytical Chemistry and Sensors
- Forensic Fingerprint Detection Methods
- Sulfur Compounds in Biology
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Synthesis of β-Lactam Compounds
- Synthesis and Catalytic Reactions
- Electrochemical Analysis and Applications
- Carbon Nanotubes in Composites
- Supramolecular Chemistry and Complexes
- Supramolecular Self-Assembly in Materials
- Electrochemical sensors and biosensors
- Cyclopropane Reaction Mechanisms
- Biometric Identification and Security
- Conducting polymers and applications
- Graphene research and applications
- Forensic and Genetic Research
- Asymmetric Synthesis and Catalysis
- Polyamine Metabolism and Applications
- Catalytic Alkyne Reactions
- Crystallography and molecular interactions
- Protein Interaction Studies and Fluorescence Analysis
Guru Nanak Dev University
2016-2025
Centre of Advanced Studies
2014-2021
Indian Institute of Management Amritsar
2014-2021
Punjab Technical University
2016
Indian Institute of Technology Kanpur
2007-2013
Institut de Biologie Moléculaire et Cellulaire
2009-2013
Centre National de la Recherche Scientifique
2009-2013
Immunologie, Immunopathologie et Chimie Thérapeutique
2009-2013
University of Trieste
2009
Université de Strasbourg
2009
Green fluorescent aggregates of diphenylpyrimidinone–salicylideneamine show AIE + ESIPT in 99% H<sub>2</sub>O:CH<sub>3</sub>CN for the visualization fingerprints on aluminium, steel, glass, ceramic tile and metal coin surfaces.
Herein, we report design, synthesis, and self-assembly of perylene diimide (PDI) based near-IR intracellular probe (PS-PDI). PS-PDI molecules undergo aggregation to form self-assembled nanospheres nanorods morphology in THF : H2O (1 1) DMSO 9), respectively. The have an open hole on surface reminiscent vesicle structure (with a diameter internal void the range 20-25 nm) whereas lengths extended up few μm range. Pd0 depropargylation leads de-aggregation these aggregates into smaller spherical...
Picric acid, due to its low p K a value, possesses distinct physicochemical features from all other nitroaromatic derivatives, enabling the design of fluorescent probes for sensitive and selective detection.
We report the synthesis and characterization of adenine-single-walled carbon nanotube (SWCNT) hybrid materials, where for first time nucleobases are covalently attached to exosurface SWCNTs. The structural properties all hybrids have been characterized using usual spectroscopic microscopic techniques. degree functional groups functionalized SWCNTs (f-SWCNTs) 2a 2b is one adenine group each 26 37 atoms, respectively. Solid-state magic angle spinning (13)C NMR spectroscopy (MAS NMR)...
Cyclophane BIMCP-1 undergoes ionic self-assembly with surfactant sodium dodecylbenzenesulfonate (SDBS) at a concentration far below its CMC value to form aggregates spherical morphology. The rotational restriction of rings in these facilitates 32-fold enhancement emission intensity (AIEE) allow fluorescence based determination SDBS 4 μM (1.4 ppm) as the lowest detection limit. Sodium salts fatty acids and inorganic anions halides, CN–, HSO4–, SO42–, H2PO4–, SCN–, NO3– do not interfere...
1-(p-Terphenyl)-benzimidazolium (TRIPOD-TP) molecules undergo self-assembly to form rodlike structures in aqueous medium, as shown by field-emission scanning electron microscopy, transmission and dynamic light scattering studies. Upon gradual addition of picric acid (PA), these aggregates an aggregation/disaggregation process complex morphological (10(-12)-10(-10) M PA) spherical (10(-9)-10(-8) PA). These further dissolution well-dispersed spheres between 10(-7)-10(-6) PA. During...
A highly selective and sensitive chemodosimeter for detection of cyanide ions in HEPES buffer the presence blood serum using a ratiometric approach through dual UV-Vis fluorescence channels with lowest limit 0.08 ppb has been synthesized.
Chemosensor <bold>1</bold> shows three different responses towards Cu<sup>2+</sup>, acetate and Cu(OAc)<sub>2</sub> ion pair following triple-signaling mechanisms also demonstrate fabrication of INH, IMP, AND, NOR logic gates.
The aggregates of perylenediimide based chemosensor (PDI 1) undergo de-aggregation induced fluorescence quenching selectively with ClO4− ions both in the solution and solid phase can detect drinking water fireworks. PDI 1 is permeable to C6 glioma cells, be detected using confocal microscopy.
DPSA shows applications in establishing the individuality of three subjects using 1st (pattern arch, loop or whorl) and 2nd (minutiae details dots, ridge ending, core delta) level information.
Abstract A novel hydroxy benzothiazole based yellow fluorescent powder (labelled as 2 ‐SiO ) was prepared by adsorption of on silica (4 % w / for visualization latent fingerprints (LFPs) and glove prints using dusting method. The solid‐state spectrum shows emission peak at 550 nm with CIE‐1931 coordinates ( 0.42, 0.50 colour purity is 58.6 %. high fluorescence in the could be attributed to AIE+ESIPT features. Due powder, imaging LFPs a variety porous non‐porous substrates including prints,...
Stuck together: adenine/carbon nanotube hybrids trigger the formation of controlled-size catalytic silver nanoparticles on surface. The efficiency resulting species was assessed in oxidation 2-methylhydroquinone to its corresponding benzoquinone, with complete recovery and without loss activity catalyst.
The synthesis, characterization and metal complexation of a new class perylene bisimides (PBIs) as an integral part ethylenediaminetetraacetic acid (EDTA) are reported.
Abstract The detection and quantification of spermine in clinical practice is important for early diagnosis many diseases. Chromatographic immunoassay‐based methods are commonly used. However, a fluorescence‐based assay could provide real‐time detection. Herein, the synthesis aggregation properties dicationic perylene probe ( N 1 ‐dodecyl‐ 3 ‐(4‐phenyl)benzimidazolium‐functionalized perylenediimide DAB‐PDI )) used to develop fluorescent “turn‐on” ensemble discussed. fluorescence (10 μ m , Φ...
Self-assembled nanorods shows disassembly and inhibition of the ICT/PET process with Cu<sup>2+</sup> for developing INH, complimentary NOR/OR TRANSFER logic functions fluorosolvatochromism
<bold>PDI–DAMN</bold> shows the disintegration of nanofibers into flake-like aggregates with ‘<italic>turn-on</italic>’ fluorescence response on addition ClO<sup>−</sup> in solid-state, bio-fluids and MG-63 cells.
In this review, examples of perylene diimide-based probes containing reactive groups at <italic>N</italic>-imide or/and <italic>bay</italic>-positions are discussed with emphasis on the design strategies and sensing mechanism.
Cassia fistula L. is a highly admirable traditional medicinal plant used for the treatment of various diseases and disorders. The present study was performed to divulge antioxidant, antiproliferative, apoptosis-inducing efficacy fractions from C. leaves. hexane (CaLH fraction), chloroform (CaLC ethyl acetate (CaLE n-butanol (CaLB aqueous (CaLA fraction) were sequentially fractionated 80% methanolic (CaLM extract) CaLE fraction using column chromatography yield pure compound, which...
ABSTRACT The reaction‐based probe perylene diimide–hydroxyphenyl benzothiazole ( PR ) can be used for the detection and discrimination of H 2 S, DTT Cys in 20% HEPES buffer–DMSO DMSO. S induced radical anion formation buffer thiolysis ether bond However, addition showed only a decrease absorbance intensity insignificant behaviour towards optical, AFM DLS studies along with isolation reaction product model support interaction bio thiols.