A5054652521- Glass properties and applications
- Luminescence Properties of Advanced Materials
- Luminescence and Fluorescent Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Porphyrin and Phthalocyanine Chemistry
- Molecular Sensors and Ion Detection
- Nonlinear Optical Materials Studies
- Analytical Chemistry and Sensors
- Organic Electronics and Photovoltaics
- Phase-change materials and chalcogenides
- Conducting polymers and applications
- Microwave Dielectric Ceramics Synthesis
- Laser-Ablation Synthesis of Nanoparticles
- Gas Sensing Nanomaterials and Sensors
- Photochemistry and Electron Transfer Studies
- Advanced Chemical Sensor Technologies
- Nanoparticles: synthesis and applications
- Organic Light-Emitting Diodes Research
- Crystallography and molecular interactions
- Diamond and Carbon-based Materials Research
- Nuclear materials and radiation effects
- Photodynamic Therapy Research Studies
- Photochromic and Fluorescence Chemistry
- Environmental Toxicology and Ecotoxicology
SRM Institute of Science and Technology
2018-2025
Institute of Molecular Functional Materials
2024
Bangalore University
2014-2019
Indian Institute of Science Bangalore
2012-2019
SRM University
2017-2019
Pondicherry University
2006-2016
University of Aveiro
2013-2016
A novel fluoranthene based fluorescent chemosensor for the detection of picric acid (PA) at parts per billion (ppb) level was evaluated. Static fluorescence quenching dominant process by intercalative π–π interaction between (S1) and nitroaromatics.
A key parameter in the analysis of compounds and study their physical, chemical, mechanical properties is knowledge crystal size. There are two common techniques for determining this size: transmission electron microscopy (TEM) Brunauer-Emmett-Teller theory (BET). These methods time-consuming expensive; thus, calculation size by X-ray diffraction (XRD) proposed. several calculating diffraction, but not all peaks were considered errors very large. In study, Modified Scherrer method...
In this paper we present the structure and spectroscopic, photophysical nonlinear optical studies of covalently functionalized novel graphene oxide–[Cu, Zn, Sn, H2 (metal free), VO] porphyrin composites. The composites were characterized by Field Enhanced Scanning Electron Microscopy (FE-SEM), micro-Raman, absorption, Fourier transform infrared (FT-IR), steady state time resolved fluorescence spectroscopic techniques. exhibit strong quenching, suggesting electronic interactions between oxide...
The nonlinear optical (NLO) and limiting (OL) properties of covalently linked graphene-porphyrin composite materials were investigated using Z-scan technique in nanosecond regime. We observed enhanced NLO OL composites comparison to the individual graphene porphyrins. improved property is attributed energy transfer between porphyrin graphene, which excited state absorption scattering. Nonlinear susceptibilities χ(3) were, order 10−12 esu, measured degenerate four wave mixing High values...
In this work, we have synthesized a series of TDPP derivatives with different alkyl groups such as n-hexyl (−C6H13) 3a, 2-ethylhexyl (-(2-C2H5)C6H12) 3b, triethylene glycol mono methyl ether (-(CH2CH2O)3cH3, TEG) 3c, and octadodecyl (-(8-C8H17)C12H22) 3d. N,N dialkylation thiophene-diketopyrrolopyrrole (TDPP, 1) strongly influences its solubility, solid state packing, structural order. These materials allow us to explicitly study the influence chain on packing photophysical properties....
This paper describes the influence of donor group on solid state packing and electronic properties diketopyrrolopyrrole based small molecules.
A new class of donor-bridge-acceptor (D-π-A) π-conjugated light-emitting molecules comprising carbazole as donor and maleimide (Cbz-MI, Cbz-MI(d)), phthalimide (Cbz-Pth) acceptor units with phenyl ring spacer have been synthesized in good yields. These compounds exhibit high quantum yield three distinct emission colors yellowish-green (Cbz-MI), bright yellow Cbz-MI(d), sky blue the solid state. Single-crystal X-ray chemical calculations reveals that twisting rings torsional angle on reduce...
Herein, we demonstrate the detection of glucose in a noninvasive and nonenzymatic manner by utilizing an extended gate field-effect transistor (EGFET) based on organic molecule pyrene phosphonic acid (PyP4OH8) incorporated nickel metal–organic framework (NiOM-MOF). The prepared electrode responds selectively to instead sucrose, fructose, maltose, ascorbic acid, uric 1× phosphate buffer saline solution. Also, scanning Kelvin probe system, sensing electrode's work function (Φ) is measured...
A series of fluoranthene derivatives (F1–F5) varied with nature and type substituents were synthesized via Diels–Alder reaction followed by in situ decarbonylation. The solid state structures have been established through single crystal X-ray diffraction (XRD). presence extended conjugation having two alkyloxy chains on phenyl rings induces flexibility to orient opposite each other interacts another unit weak π–π interactions show unique supramolecular arrangements. envisaged photophysical...
Abstract Herein we report a novel fluoranthene‐based fluorescent fluorophore 7,10‐bis(4‐bromophenyl)‐8,9‐bis[4‐(hexyloxy)phenyl]fluoranthene ( S 3 ) and its remarkable properties in applications of explosive detection. The sensitivity towards the detection nitroaromatics (NACs) was evaluated through fluorescence quenching solution, vapor, contact mode approaches. approach using thin‐layer silica chromatograp‐ hic plates exhibited femtogram (1.15 fg cm −2 limit for trinitrotoluene (TNT)...
A new class of dual fluorescent chemosensors for nitroaromatic compounds (NACs) based on phosphonated pyrene derivatives is reported, showing high selectivity towards trinitrotoluene (TNT). The strong intermolecular interactions (π-π stacking and hydrogen bonding) allow fluorescence quenching with visual detection in short response times.
Fluorescent molecular probes based on phosphonate-functionalized porphyrin derivatives have been designed for selective detection of nitroaromatics. It is shown that recognition cooperative hydrogen bonding and π-π stacking interactions with electron-deficient molecules (nitroaromatic compounds, NACs), displaying superior toward trinitrotoluene (TNT). The P═O functional groups decrease the lowest unoccupied orbital (LUMO) energy level porphyrins and, consequently, facilitate electron...
Diketopyrrolopyrrole derivatives containing phenyl and thiophene units adorned with alkoxynaphthalene (<bold>Naph-PDPP</bold> <bold>Naph-TDPP</bold>) were synthesized by a Suzuki cross-coupling reaction. SKP measurements carried out upon exposure to different VOCs.
We report a novel synthetic approach, with good yields, for the synthesis of selective dimethylamine-substituted phthalonitriles (<bold>1–3</bold>) in presence triethyl phosphite and dimethylformamide at 160 °C.
In this work, we have developed two modular compounds encompassed with pyrene at meso position of the freebase porphyrin (H2PyP) and its complex Zn (ZnPyP). Both exhibited to...