A5004936397- Luminescence and Fluorescent Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Molecular Sensors and Ion Detection
- Porphyrin and Phthalocyanine Chemistry
- Covalent Organic Framework Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Crystallography and molecular interactions
- Transition Metal Oxide Nanomaterials
- Organic Electronics and Photovoltaics
- Photochromic and Fluorescence Chemistry
- IoT Networks and Protocols
- Analytical Chemistry and Sensors
- Advanced Photocatalysis Techniques
- Supramolecular Self-Assembly in Materials
- Photochemistry and Electron Transfer Studies
- Synthesis and Properties of Aromatic Compounds
- Radical Photochemical Reactions
- Metal-Catalyzed Oxygenation Mechanisms
- Porphyrin Metabolism and Disorders
- Advanced biosensing and bioanalysis techniques
- Lipid Membrane Structure and Behavior
- Pickering emulsions and particle stabilization
Indian Institute of Technology Dharwad
2017-2025
The University of Texas at Austin
2025
Vellore Institute of Technology University
2023-2024
McGill University
2015-2023
Indian Institute of Management Visakhapatnam
2021
Indian Institute of Technology Bombay
2009-2017
Institute of Chemistry
2014
Academia Sinica
2014
University of Mumbai
2014
Institute of Chemistry, Academia Sinica
2013
Dynamic covalent chemistry enables self-assembly of reactive building blocks into structurally complex yet robust materials, such as organic frameworks (COFs). However, the synthetic toolbox used to prepare and thus spectrum attainable properties, is very limited. For π-conjugated COFs, Schiff base condensation aldehydes amines only general dynamic reaction, but resulting imine-linked COFs display a moderate electron delocalization are susceptible hydrolysis, particularly in acidic...
Fingerprints of π-conjugated compounds are ubiquitous in nature and play a crucial part human existence. For instance, cis-retinal, an endogenous molecule present the eye, performs vital role function visual perception. π-Conjugated molecules have also received great deal attention owing to their intriguing optical properties created surge optoelectronics. Varieties molecules/oligomers been developed explored for number applications such as organic light-emitting diodes (OLEDs), field-effect...
Boron-dipyrromethene dyes (BODIPYs) containing halogens at pyrrole carbons are very useful synthons for the synthesis of a variety BOIDPYs wide range applications. Among functional groups, groups which can be regiospecifically introduced any desired carbon BODIPY framework by adopting appropriate synthetic strategies. The halogenated BODIPYs undergo facile nucleophilic substitution reactions to prepare several interesting based compounds. This review describes synthesis, properties and...
The black crystalline (aza)triangulene-based covalent organic framework TANG-COF was synthesized from its trinitro-TANG precursor via a one-pot, two-step reaction involving Pd-catalyzed hydrogenation and polycondensation with an aromatic dialdehyde. High crystallinity permanent porosity of the layered two-dimensional (2D) structure were established. rigid, electron-rich trioxaazatriangulene (TANG) building block enables strong π-electron interactions manifested in broad absorptions across...
A series of boron dipyrromethene (BODIPY) dyes containing two aldehyde functional groups at the 3 and 5 positions have been synthesized in low-to-decent yields steps. In first step, meso-aryl dipyrromethanes were treated with POCl(3) N,N-dimethylformamide to afford 1,9-diformylated dipyrromethanes. second diformylated situ oxidized 2,3-dichloro-5,6-dicyano-1,4-benzoquinone then reacted BF(3)·OEt(2) 3,5-diformylboron dipyrromethenes. The X-ray structural analysis indicated that are involved...
A series of structurally simple yet highly tunable organoboron luminophores was designed and synthesized. The solid-state fluorescence quantum yields exhibit nearly exponential growth by decorating the luminophore with additional sterically demanding substituents. Uniquely, luminescence these dyes can be easily switched on/off acidic/basic vapors, yielding a switching function.
We report the synthesis of first examples BF(2) and B(OR)(2) complexes oxasmaragdyrin, expanded core-modified porphyrin, in decent yields under very simple reaction conditions at room temperature. The boron complexation oxasmaragdyrin alters electronic properties macrocycle significantly as evident by various spectroscopic techniques. Our preliminary studies indicated that B(OH)(2)-smaragdyrin complex can act a selective neutral fluoride ion sensor.
Fluorescent porous organic polymers are a unique class of materials owing to their strong aggregation induced emission, long range exciton migration and permanent porosity, thus envisioned possess wide applications (sensing, OLEDs).
We present Jammed Interconnected Bilayer Emulsions (JIBEs) as a class of tissue-like materials with macroscopic scalability and rapid fabrication, comprising millions to billions bilayer-separated aqueous compartments. These closely mimic the organizational structure properties biological tissues. Our self-assembly method for producing JIBEs generates milliliter- deciliter-scale volumes within minutes representing over 10,000-fold improvement in fabrication speed droplet-based artificial...
Dimethoxynaphthalene peri-diselenide-based BODIPY (4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) probe has been synthesized. The demonstrated selectivity and sensitivity for hydrogen peroxide (H2O2) tert-butylhydroperoxide (t-BuOOH), hydroxyl radical (•OH), peroxynitrite ion (ONOO–) detection reversibility upon treatment with glutathione. limits of the were observed to be 0.40 μM H2O2, 0.41 t-BuOOH, 0.95 •OH, 0.46 ONOO–, respectively. A proposed mechanism "turn-on" event suggested corroborated...
We present Jammed Interconnected Bilayer Emulsions (JIBEs) as a class of tissue-like materials with macroscopic scalability and rapid fabrication, comprising millions to billions bilayer-separated aqueous compartments. These closely mimic the organizational structure properties biological tissues. Our self-assembly method for producing JIBEs generates milliliter- deciliter-scale volumes within minutes representing over 10,000-fold improvement in fabrication speed droplet-based artificial...
π‐Conjugated organic compounds display unique optical and electrical properties, rendering them appropriate for semiconducting applications. Knoevenagel condensation is one of the important reactions that facilitate formation olefin linkages (‐C=C‐) thus has been widely employed to synthesize new π‐conjugated molecules. This review summarizes synthesis constructed using four novel moieties: diketonate/azopyrrole‐BF2 complexes (BF), p‐azaquinodimethane (AQM), diketopyrrolopyrrole (DPP),...
We have synthesized four examples of a cyclotriphosphazene ring appended with six boron-dipyrromethene dyes N3P3(BODIPY)6 by adopting two different methods. In method I, 1 equiv N3P3Cl6 was treated 6 meso-(o- or m- p-hydroxyphenyl)boron-dipyrromethene in tetrahydrofuran (THF) the presence cesium carbonate. This afforded yields ranging from 80 to 90%. II, we first prepared hexakis(p-formylphenoxy)cyclotriphosphazene N3P3(CHO)6 treating 4-hydroxybenzaldehyde carbonate THF. second step,...
We developed a simple, facile route for the synthesis of BF2 complexes prodigiosin type oligopyrroles and their cholesterol conjugates. This gives an access to synthesize any desired meso-aryl-substituted 3-pyrrolyl BODIPYs which were not easily accessible earlier.
Point-of-care devices are expected to play very critical roles in early diagnosis and better treatment of cancer. Here, we report the end-to-end development novel portable biosensors for detecting carcinoembryonic antigen (CEA), a cancer biomarker, almost instantly at room temperature. The device uses reduced graphene oxide (rGO) as base conducting layer poly[(1,4-phenylene)-alt-(3,6-(1,2,4,5-tetrazine)/3,6-(1,2,4,5-dihydrotetrazine))] (PhPTz) an immobilizing matrix CEA antibodies....
A simple method has been employed to synthesize a cyclotriphosphazene appended with six porphyrins. The reaction of one equivalent hexachlorocyclotriphosphazene equivalents 5-(4-hydroxyphenyl)-10,15,20-tri(p-tolyl)porphyrin or -21-thiaporphyrin in tetrahydrofuran the presence cesium carbonate, followed by column-chromatography purification, afforded hexaporphyrinato systems as single products 80-90 % yields. metal(II) derivatives (Cu(II), Zn(II)) were prepared treating hexaporphyrin...
Organogels, being an important class of soft materials, have evolved to be one the most attractive subjects bridging supramolecular chemistry and material sciences due their structural diversity associated physical properties. Myriad applications in fields such as optoelectronics, light harvesting, environmental science, regenerative medicine are envisaged. Supramolecular gels usually formed through self-aggregation small-molecule gelators form entangled self-assembled fibrillar networks a...
Abstract Nucleophilic substitution reactions of 2‐, 3‐ and 4‐hydroxypyridines with 3,5‐dibromo meso ‐aryl ‐furyl boron‐dipyrromethenes (BODIPYs) resulted in the formation corresponding 3,5‐bis(oxopyridinyl)‐BODIPYs 3,5‐bis(pyridinyloxy)‐BODIPYs decent yields. The effect a pyridone versus an oxypyridine at 5‐positions on spectral, electrochemical photophysical properties were studied as function solvent. exhibit broad, red‐shifted absorption emission bands, decreased quantum yields lifetimes,...
The dibenzofuran/dibenzothiophene-based nonaromatic hybrid macrocycles, exhibiting the features of both contracted subporphyrins and triphyrins, have been synthesized under simple reaction conditions using readily available precursors. monoanionic new macrocyclic ligands with three donor atoms, such as two pyrrole nitrogens one dibenzofuran oxygen or dibenzothiophene sulfur, form Re(I) complexes.