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+...

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...

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.

A weakly fluorescent cobalt(II) complex is synthesized using 2-(2-pyridyl)-benzimidazole (PBI) as a chelating ligand and characterized by single crystal X-ray structure. This serves an efficient probe for trace level determination of aspartic acid (AspA) glutamic (GluA) in aqueous solution. Rest the naturally occurring amino acids did not interfere. Both replaces PBI from coordination sphere Co(II)-PBI resulting appearance strong fluorescence signal released free PBI. The response very fast...

A naphthalene–thiophene hybrid molecule (Z)-1-((thiophen-2-ylmethylamino)methylene)naphthalen-2(1H)-one (HL) was prepared by condensation of 2-thiophenemethylamine and 2-hydroxy-1-naphthaldehyde. According to FTIR, 1H NMR spectrometry single crystal X-ray analysis, HL exists in the cis-keto-amine tautomeric form. behaves like a molecular AND type binary logic gate with two inputs viz. Zn2+ OAc− ions whereby fluorescence system turns on. The structures its zinc acetate complex were also...

An efficient fluorescent probe (E)-N1-((E)-2-((pyren-7-yl)methyleneamino)ethyl)-N2-((pyren-7-yl)methylene)ethane-1,2-diamine (L) has been synthesized by a facile one-step condensation reaction. L can selectively detect Cd2+ in presence of other common metal ions 0.1 M HEPES buffered DMSO–water (4 : 1, v/v) medium. The detection limit is 1.8 × 10−8 M. effectively convert the excimer emission into its monomer which turn exhibits time-dependent red-shift.

The synthesis, characterization and selective interaction of a naphthalene based fluorescent probe (L) with Al3+ is described. detection limit L for 4.8 × 10−7 M. can efficiently detect in living cells under fluorescence microscope. Experimentally observed structural spectroscopic features its Al3+complex have been substantiated by computational calculations using density functional theory.

A naphthalene-based thiophene derivative (L) can act as a Cr3+ selective turn-on fluorescence probe in aqueous methanol. The structure of L has been established from different spectroscopic data and confirmed by X-ray crystallography. Under optimum conditions, the intensity increases linearly 1.0 × 10−6 to 52 M with detection limit 1.5 10−7 M. also exhibits good cell permeability detect intracellular contaminated living cells.

A pyrene–thiophene conjugate has been used for the efficient detection of intracellular irons through generation bright green luminescence. Amongst three different probes being reported, it is observed that efficiency naked eye luminescent iron increases on moving from naphthalene to anthracene pyrene. The developed technique may be very useful monitor and zinc supplementation as single micronutrients in living systems construction an INHIBIT logic gate.

2-(2-Pyridyl) benzimidazole based ternary Mn(II) complex (MnPBINCO) is established as an arsenate selective turn-on fluorescence probe in HEPES buffered (0.1 M, methanol/water = 0.5/99.5, v/v, pH 7.4) solution for the first time. MnPBINCO can determine presence of HAsO42− at concentrations low 1 × 10−10 M and efficiently detect intracellular under a microscope.

Pyrene appended naphthalene derivative, NEDAP can selectively detect histidine via inter-molecular H-bond assisted molecular ring formation that imparts rigidity to the assembly inhibit TICT (Twisted Intra-molecular Charge Transfer) process leading fluorescence enhancement. 1H NMR titration, mass spectra and DFT (Density Functional Theory) studies nicely demonstrate this sensing process. Visible light excitation favours living cell imaging as low 0.01 μM histidine.

An exceptionally simple amide-imine conjugate, (

Abstract An efficient fluorescence probe, 4‐methyl‐2,6‐bis((thiophen‐2‐ylmethylimino)methyl)phenol (DFPTMA) and its SCN − adduct has been synthesized characterized by different spectroscopic techniques like 1 H NMR, 13 C QTOF‐MS ES + , UV‐Vis FTIR spectroscopy. Single crystal X‐ray structure of DFPTMA is reported. In presence exhibits significant enhancement ( λ Ex 455 nm, Em 504 nm) in aqueous methanol (water‐methanol, 1:4, V / 0.1 mol/L HEPES buffer, pH 7.4). Common bio‐relevant anions viz...

Abstract Tuning of ligand structures through controlled variation ring number in fused‐ring aromatic moiety appended to antipyrine allows detection 7.8 × 10 −12 M pyrene via aggregation‐induced emission (AIE) associated with 101‐fold fluorescence enhancement. In one case, unit is replaced by pyridine derive bis‐methylanthracenyl picolyl amine. The four molecules have been confirmed single crystal X‐ray diffraction analysis. Among them, pyrene‐antipyrine conjugate (L) undergoes triggered...

Equimolar mixture of pyridine-2,6-dimethanol (PDM), and thiocyanate ion immobilized on silica serves as an efficient sorbent for selective retention Cu(II) from other associated metal ions at µg g−1 level. The maximum sorption capacity was found 2.44 mmol pH 6.0. sorbed completely eluted with 3 mol L−1 HNO3 measured a flame atomic absorption spectrometer (FAAS). structure the extracted complex confirmed by single-crystal X-ray analysis Fourier transform-infrared (FT-IR) spectroscopy....

AbstractTrace-level (μg g−1) selective separation of Mn(II) from other associated metal ions have been carried out by impregnating equimolar mixture pyridine-2, 6-dimethanol (PDM) and thiocyanate ion on silica. The sorbent showed maximum sorption capacity (1.23 mmol g–1) at pH 5.0. was completely eluted 8.5 mL 1.0 mol L−1 HNO3 g subsequently measured with flame atomic absorption spectrometer (FAAS).The structure the extracted complex established Fourier transform infrared red spectra...