A5013075862- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Molecular Sensors and Ion Detection
- Metal complexes synthesis and properties
- Luminescence and Fluorescent Materials
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Advanced biosensing and bioanalysis techniques
- Crystallography and molecular interactions
- Analytical chemistry methods development
- Metal-Organic Frameworks: Synthesis and Applications
- Magnetism in coordination complexes
- Inorganic and Organometallic Chemistry
- Carbon dioxide utilization in catalysis
- Radioactive element chemistry and processing
- Lanthanide and Transition Metal Complexes
- Electrochemical sensors and biosensors
- Crystal structures of chemical compounds
- Porphyrin and Phthalocyanine Chemistry
- CO2 Reduction Techniques and Catalysts
- Nanomaterials for catalytic reactions
- Thermal and Kinetic Analysis
- Chemical Synthesis and Reactions
- Quantum Dots Synthesis And Properties
- Sulfur-Based Synthesis Techniques
University of Burdwan
2015-2024
University of Kalyani
2024
Indira Gandhi Agricultural University
2023
Haldia Institute of Technology
2023
KPC Medical College and Hospital
2020-2022
Alwar Pharmacy College
2022
Indian Institute of Science Bangalore
2022
Adamas University
2022
University of Calcutta
2012-2021
Cotton University
2016-2019
An efficient fluorescent Al3+ receptor, N-(2-hydroxy-1-naphthalene)-N′-(2-(2-hydroxy-1-naphthalene)amino-ethyl)-ethane-1,2-diamine (L) has been synthesized by the condensation reaction between 2-hydroxy naphthaldehyde and diethylenetriamine. High selectivity affinity of L towards in ethanol (EtOH) as well HEPES buffer at pH 7.4, makes it suitable to detect intracellular with fluorescence microscopy. Metal ions, viz.Li+, Na+, K+, Mg2+, Ca2+, Mn2+, Co2+, Ni2+, Cu2+, Zn2+, Ag+, Cd2+, Hg2+ Pb2+...
Several new ligands, azoimidazoles belonging to the class 1-methyl-2-(arylazo)imidazoles (L1 (3)) and 1-benzyl-2-(arylazo)imidazoles (L2 (4)) (R = H (a), Me (b), OMe (c), Cl (d), NO2 (e)) have been synthesized reacted with RuCl3 in ethanol under refluxing conditions. Two isomers of composition RuL2Cl2, green (i) blue (iii), are chromatographically separated. The isomer is quantitatively transformed on a high boiling solvent. isomeric structures confirmed by X-ray crystallography. Crystal...
Developments in the field of fluorescent chemosensors for trace level determination Al3+ have been described. Design, synthesis and applications selective sensors attracted a great deal attention due to their versatile emerging biological implications. A systematic description different probes based on fluorophore skeleton has made. The sensing mechanism each probe briefly discussed. Special emphasis given consideration greenness methods, particularly, use greener solvents like water. review...
Rhodamine-diformyl p-cresol conjugate (L) has been developed as a novel Al3+-selective fluorometric and colorimetric sensor based on the FRET mechanism for first time. L can selectively detect Al3+ through time-dependent PET–CHEF processes. This phenomenon is nicely reflected from 1H NMR, fluorescence lifetime, cell imaging studies. The probe low 5 × 10–9 M in HEPES-buffered EtOH:water (0.1 M, 4:1, v/v, pH 7.4). shows pH-dependent emission properties viz. an intense red (585 nm) at acidic...
2-((Naphthalen-6-yl)methylthio)ethanol (HL) was prepared by one pot synthesis using 2-mercaptoethanol and 2-bromomethylnaphthalene. It found to be a highly selective fluorescent sensor for Al3+ in the physiological pH (pH 7.0–8.0). could sense bound cells through fluorescence microscopy. Metal ions like Mn2+, Fe3+, Co2+, Ni2+, Cu2+, Zn2+, Ag+, Cd2+, Hg2+, Cr3+ Pb2+ did not interfere. No interference also observed with anions Cl−, Br−, F−, SO42−, NO3−, CO32−, HPO42− SCN−. Experimentally...
An Al3+ selective ratiometric fluorescent probe (L) has been synthesized by condensation of 4,5-diaminopyrimidine with 1-pyrenecarboxaldehyde. The structure L confirmed single crystal X-ray analysis. In the presence Al3+, exhibits a considerable excimer emission at 445 nm along decrease its monomer 368 in DMSO–H2O (4 : 1, v/v). lowest detection limit for is 0.24 μM. Furthermore, can permeate through cell membrane and detects intracellular ions under fluorescence microscope.
1 Effects of graded doses propranolol have been studied on gastric secretion and ulcers in pylorus-ligated rats.2 A dose-dependent action was observed; small increased total volume, acid output pepsin along with an increase the incidence but high were inhibitory.
A rhodamine-pyrene hybrid molecule acts as a colorimetric and fluorimetric sensor for Al(3+) through time dependent PET-CHEF FRET processes associated with tri-color emission. Intracellular has been visualized blue-green-red The lowest limit of detection is 0.02 μM.
An efficient Al3+ receptor, 6-(2-hydroxybenzylideneamino)-2H-chromen-2-one (HBC), has been synthesized by condensing salicylaldehyde with 6-aminocoumarin. The molecular structure of HBC determined a single crystal X-ray analysis. It was established that in the presence Al3+, shows 25 fold enhancement fluorescence intensity which might be attributed to chelation-enhanced (CHEF) process. binds Al(NO3)3 1 : stoichiometry binding constant (K) 7.9 × 104 M−1. Fe3+ and Mn2+ quench emission [HBC +...
Ni2+-induced intramolecular excimer formation of a naphthalene-based novel fluorescent probe, 1-[(naphthalen-3-yl)methylthio]-2-[(naphthalen-6-yl)methylthio]ethane (L), has been investigated for the first time and nicely demonstrated by excitation spectra, fluorescence lifetime experiment, 1H NMR titration. The addition Ni2+ to solution L (DMSO:water = 1:1, v/v; λem 345 nm, λex 280 nm) quenched its monomer emission, with subsequent enhancement intensity (at 430 an isoemissive point at 381...
A novel pyrimidine based Al3+ selective fluorescent probe (L) has been synthesised by a facile one step coupling of 4,5-diamino with 2-hydroxy naphthaldehyde. L obtained in pure crystalline form without any column chromatographic purification. Upon binding Al3+, the single emission band undergoes red shift from 470 nm to dual peaks viz. 505 and 538 appearance very intense green luminescence. could detect as low 2.9 × 10−7 M constant value 5.4 104 M−1. contaminated cells became presence...
Condensation of salicylaldehyde and 4-aminoantipyrine has yielded a new fluorescent probe (APSAL) capable detecting intracellular arsenate at the micromolar level for first time. The structure been established by different spectroscopic techniques confirmed from X-ray crystallography. Common anions, viz., F(-), Cl(-), Br(-), I(-), N(3)(-), NCO(-), NO(2)(-), NO(3)(-), SCN(-), CN(-), CH(3)COO(-), SO(4)(2-), ClO(4)(-), HPO(4)(2-) do not interfere. binding constant APSAL H(2)AsO(4)(-) determined...
Naphthalene–salisaldehyde conjugate (NAPSAL) is established as a novel arsenate (H2AsO4−) selective 'turn-on' fluorescence probe. It can detect low 5 × 10−9 M H2AsO4− in HEPES buffered EtOH : water (0.1 M, 1 9, v/v, pH 7.4). Trace level drinking samples measured using standard addition method. Intracellular Candida albicans, grown arsenic contaminated of Purbasthali has successfully been detected under microscope.
Dynamic to static excimer formation followed by lysine concentration dependent spectral shift of a single crystal X-ray structurally characterized pyrene based probe allows highly selective ratiometric detection at the nanomolar level.
Lysine assisted ratiometric monomer to excimer conversion of pyrene derivatives allows intracellular lysine detections.
An azine based smart probe is developed for the naked eye and fluorescence recognition of I–. In both modes, shows intense red color in presence I– THF. Moreover, solvent dependent multiple signaling, viz., green emission with Al3+ aqueous methanol ratiometric yellow Zn2+ DMSO. The structure hydrazine precursor has been confirmed by single crystal X-ray structure.The can detect as low 1.2 × 10–7 M I–, 6.8 10–8 Al3+, 5.7 Zn2+, whereas respective association constants are 3.6× 104 M–1, 5.2 7.9...