A5052344490- Supramolecular Self-Assembly in Materials
- Molecular Sensors and Ion Detection
- Luminescence and Fluorescent Materials
- Polydiacetylene-based materials and applications
- Insect and Pesticide Research
- Electrochemical Analysis and Applications
- Porphyrin and Phthalocyanine Chemistry
- Analytical Chemistry and Sensors
- Plant Virus Research Studies
- Electrochemical sensors and biosensors
- Photosynthetic Processes and Mechanisms
- Amino Acid Enzymes and Metabolism
- Insect Resistance and Genetics
- Polyamine Metabolism and Applications
- Photochemistry and Electron Transfer Studies
- Sulfur Compounds in Biology
- Graphene and Nanomaterials Applications
- Supramolecular Chemistry and Complexes
- Dendrimers and Hyperbranched Polymers
- Conducting polymers and applications
- Viral Infectious Diseases and Gene Expression in Insects
- Nanoparticle-Based Drug Delivery
- 3D Printing in Biomedical Research
- Advanced biosensing and bioanalysis techniques
- Spectroscopy and Quantum Chemical Studies
Indian Institute of Science Bangalore
2016-2024
Jawaharlal Nehru Centre for Advanced Scientific Research
2021-2022
Anthraimidazoledione-based charge transfer dyes have been designed for multimodal detection of a pathogenic biomarker, dipicolinic acid (DPA), at physiological pH. A change in visible color from yellow to red was observed along with an appearance luminescence when the probe-Eu3+ complex exposed DPA. Conversely, probe-Cu2+ complex, solution turns into orange presence DPA blue-colored fluorescence. Thus, present sensory system can achieve naked-eye DPA, which is very rare metal complex-based...
An easy to synthesize amphiphilic dye is developed whose sensing behavior in surfactant assemblies can be modulated through surface-charge, micropolarity, and local pH, etc. Thus, the micelle-bound probe shows remarkable ion-dependent bathochromic shifts charge-transfer band, enabling simultaneous ratiometric detection of four different metal ions, such as Cu2+, Ni2+, Hg2+, Zn2+, at parts per billion (ppb) level water. This indeed a striking observation since naked-eye multiple ions...
A two-component charge-transfer hydrogel derived from a hetero-supramolecular assembly of pyrene based amino acid donor with an acceptor dye, presents opportunity, where the could discriminate biogenic thiols chemo-dosimetrically.
Nanocomposites such as graphene oxide (GO) have been incorporated into hydrogels to enhance conventional hydrogels' properties and develop new functions. Unique strong molecular interactions between GO low weight gelators allow the fabrication of various functional suitable for different applications. In present study, we report a stable soft nanocomposite hydrogel comprising pyrene-based chiral amphipath having an amino acid (l-phenylalanine) core with pendant oligo-oxyethylene hydrophilic...
A Pyrene-based hydrogel with terminal lactose residue has been developed for the detection of cholera toxin <italic>via</italic> color changing response, accompanied by gel to sol transition.
The self-assembly properties of new biocompatible, thermoreversible fluorescent hydrogels, composed amino acid residues, e.g., l-phenylalanine (PyL-PheOx) and l-tyrosine (PyL-TyrOx), have been reported. Spectroscopic investigations indicate that PyL-PheOx forms π-stacked 'compact' aggregates, while 'loose' aggregates with stronger CT characteristics are observed for PyL-TyrOx. Both the compounds showed presence fibrous networks in self-assembled state. Circular dichroism spectral studies...
Environmental pollution induced by toxic metal ions and harmful chemicals mainly from industrial waste poses a significant threat which urges for their rapid detection before release into the ecosystem above permissible level. Optical sensors are inexpensive, simple, yet efficient in sensing such toxicants. Herein, we show that structurally simple π-conjugated pyridine-end p-phenylenevinylene oligomers can selectively sense anions solution, supramolecular gels, as well solid support....
We have developed an easily scalable chromogenic probe for the dual-mode sensing of Spilosoma obliqua Nuclear polyhedrosis viruses (SpobNPV) in aqueous media.
Abstract The excited‐state proton‐transfer efficiency of a tetraarylpyrene derivative, 1,3,6,8‐tetrakis(4‐hydroxy‐2,6‐dimethylphenyl)pyrene (TDMPP), was investigated thoroughly in the presence various surfactant assemblies, such as micelles and vesicles. confined microheterogeneous environments can significantly retard extent process, resulting distinguishable optical signal compared to that bulk medium. Physical characteristics order, interfacial hydration, surface charge, influence proton...
A luminescent ruthenium(II) polypyridyl complex has been designed for ratiometric optical sensing of Spodoptera litura nuclear polyhedrosis virus (SLNPV) both in aqueous medium and commercial samples. The detailed spectroscopic studies indicate that the can electrostatically bind to negatively charged outer protein (polyhedron) layer SLNPV renders a change luminescence color from red (λem ∼ 605 nm) blue 487 nm). linear variation (ratiometric response) over wide concentration range occlusion...
Summary Synthesis and gelation property of novel pyrene‐cored chiral dendrimers PyFG1 PyFG2 have been studied. Dendritic effect was found to play a crucial role in the self‐assembly pattern, solvents for shear thinning behavior gels as well.
In the present work, we report a thermoresponsive hydrogel formed by self-assembly of compounds 1 and 2 Milli Q water. Both hydrogels showed thixotropic behavior. Atomic force microscopy (AFM) studies confirm fiber-like microstructure 2, but denser fibers were observed in case compound 1. The detected Cu2+, Fe3+, Hg2+, whereas change optical signal, specifically upon adding Cu2+ Hg2+. Mechanistically, metal ions to resulted formation (1:1) complex with Fe3+ Hg2+ (2:1) Cu2+. detection has...
Operando spectroscopic investigations during molecular redox processes provide unique insights into complex structures and their transformations.