A5065757885- Molecular Sensors and Ion Detection
- Luminescence and Fluorescent Materials
- Supramolecular Chemistry and Complexes
- Advanced biosensing and bioanalysis techniques
- Analytical Chemistry and Sensors
- Electrochemical Analysis and Applications
- Radical Photochemical Reactions
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Sulfur Compounds in Biology
- Catalytic C–H Functionalization Methods
- Advanced Photocatalysis Techniques
- Supramolecular Self-Assembly in Materials
- Electrochemical sensors and biosensors
- Catalytic Cross-Coupling Reactions
- Sulfur-Based Synthesis Techniques
- Porphyrin and Phthalocyanine Chemistry
- Nanocluster Synthesis and Applications
- Nanomaterials for catalytic reactions
- Organic Light-Emitting Diodes Research
- Metal-Organic Frameworks: Synthesis and Applications
- Synthesis and Properties of Aromatic Compounds
- Oxidative Organic Chemistry Reactions
- Polydiacetylene-based materials and applications
- Advanced Nanomaterials in Catalysis
Guru Nanak Dev University
2015-2024
Centre of Advanced Studies
2014-2020
Indian Institute of Management Amritsar
2014-2020
Centre for Advanced Study
2020
Durham University
2010-2019
Indian Institute of Integrative Medicine
2011-2012
Tohoku University
2004
Government Medical College, Amritsar
2000
Organic light-emitting diodes (OLEDs) have their performance limited by the number of emissive singlet states created upon charge recombination (25%). Recently, a novel strategy has been proposed, based on thermally activated up-conversion triplet to states, yielding delayed fluorescence (TADF), which greatly enhances electroluminescence. The energy barrier for this reverse intersystem crossing mechanism is proportional exchange (ΔEST ) between and states; therefore, materials with...
Pentacenequinone derivative 3 forms luminescent supramolecular aggregates both in bulk as well solution phase. In phase at high temperature, long-range stacking of columns leads to formation stable and ordered columnar mesophase. Further, works sensitive chemosensor for picric acid (PA) gel-coated paper strips detect PA nanomolar level provide a simple, portable, low-cost method detection aqueous solution, vapor phase, contact mode.
ADVERTISEMENT RETURN TO ISSUEPREVLetterNEXTNaphthalimide Appended Rhodamine Derivative: Through Bond Energy Transfer for Sensing of Hg2+ IonsManoj Kumar*†, Naresh Kumar†, Vandana Bhalla†, Hardev Singh†, Parduman Raj Sharma‡, and Tandeep Kaur‡View Author Information Department Chemistry, UGC-Center Advance Studies-1, Guru Nanak Dev University, Amritsar, Punjab, India, Cancer Pharmacology, Indian Institute Integrative Medicine, Canal Road, Jammu-180001, India[email protected]†Guru...
A highly selective fluorescent chemodosimeter based on rhodamine is synthesized which undergoes Cu2+ driven hydrolysis in aqueous media to produce fluorescence turn-on changes with a detection limit up the nanomolar range.
Novel pentacenequinone derivative 3 has been synthesized using the Suzuki–Miyaura coupling protocol which forms fluorescent nanoaggregates in aqueous media due to its aggregation-induced emission enhancement attributes and selectively senses picric acid with a detection limit of 500 ppb.
A new fluorescent chemosensor based on the calix[4]arene of partial cone conformation possessing a dansyl moiety has been synthesized. The demonstrates selective optical recognition Hg2+ and Cu2+ in two contrasting modes. receptor exhibited ratiometric sensing "ON−OFF" type fluorescence behavior presence Cu2+. compound behaves as molecular switch upon chemical inputs ions.
A TICT based NIR-fluorescent probe 3 has been designed and synthesized, which selectively detects HSA with fluorescence enhancement in blood plasma a detection limit of 11 nM among the various proteins, nucleotides thiols tested.
A thiacalix[4]arene based chemosensor 3 bearing two pyrene groups has been synthesized which demonstrates ratiometric sensing with Ag+ and fluorescence quenching Fe3+ ions in mixed aqueous media. The 'in situ' prepared complexes showed high selectivity toward cysteine. molecular switching between three chemical inputs (Ag+, Fe3+, cysteine) results various logic gates have integrated sequentially to generate a sequential information processing device.
Hexa-peri-hexabenzocoronene (HBC) based molecules 5 and 6 have been designed synthesized. These planar coronenes are appended with rotors to invoke aggregation induced emission enhancement (AIEE) phenomenon by controlling the ratio of H2O in solutions aggregates. aggregates HBC derivatives serve as highly selective chemosensors for picric acid (PA) mixed aqueous solution. also able detect PA vapor phase. In addition, fluorescent test strips prepared dip-coating Whatman paper both compounds...
A hexaphenylbenzene-based receptor 3 has been synthesized that forms a fluorescent spherical aggregate in mixed aqueous media due to its aggregation-induced emission enhancement attributes. These aggregates show ratiometric response toward cyanide ions via nucleophilic addition and undergo deaggregation form smaller nanoaggregates. In addition, the solution-coated paper strips of can detect range ∼2.6 ng/cm(2), thus, providing simple, portable, low-cost method for detection media. Receptor...
An oxime based fluorescent probe has been designed and synthesized, which detects free as well enzymatically generated hypochlorite. Further, the was successfully utilized for monitoring endogenously produced
The potential use of fluorescent molecular probes to measure ions and biomolecules has contributed incessantly the understanding chemical biological systems. approach many advantages such as high sensitivity, simplicity non-destructive cellular imaging that offer visible information about targeted species. In this article, our objective is discuss have sensing applications within mitochondrial environment. Mitochondria are organelles which well known for their unique physiological functions...
We expose significant changes in the emission color of carbazole-based thermally activated delayed fluorescence (TADF) emitters that arise from presence persistent dimer states thin films and organic light-emitting diodes (OLEDs). Direct photoexcitation this state 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) reveals influence species on purity its photoluminescence electroluminescence. The is sensitive to sample preparation method, enduring contributes widely reported...
A lysosome targetable naphthalimide based fluorescent probe (LyNC) has been designed and synthesized which detects hydrogen peroxide (H2O2) with high selectivity sensitivity in brain tissues living nematodes among various ROS/RNS tested. Further, the LyNC was successfully employed exogenous endogenous imaging of H2O2 cell lines.
A thiacalix[4]arene based fluorescent chemosensor 3 of 1,3-alternate conformation bearing two dansyl groups and a crown-5 ring behaves as an "On–Off" reversible switch for chemical inputs Hg2+ K+ ions mimics molecular level keypad lock in the presence F− ions.
The efficient synthesis and photophysical properties of a series ambipolar donor−acceptor−donor systems is described where the acceptor dibenzothiophene S,S-dioxide donor fluorene, carbazole, or arylamine. exhibit intramolecular charge transfer (ICT) states (of variable ICT character strengths) leading to fluorescence emission ranging from deep blue green with moderate high photoluminescence quantum yields. can be effectively tuned by systematically changing position substitution on both...
A chemosensor based on the thiacalix[4]arene of 1,3-alternate conformation has been designed and synthesized. The binding behavior this studied toward different metal ions by fluorescence spectroscopy, it was observed that selectively senses Cu(2+) ions. chemical inputs F(-) in a sequential manner generate an output which mimics functions security keypad lock.
Resonance energy transfer (RET) between donor-acceptor architecture is an important physical mechanism which used enormously for the development of fluorescent probes. The unique advantage RET its ability to non-radiatively molecules over biologically relevant distances. distance dependency makes this approach suitable bioanalysis such as distances biomolecules and molecular level interactions, both in vitro vivo. In addition, a proficient probes with ratiometric measurements. recent years,...