Journal ArticleDOI
A novel chemosensor based on rhodamine and azobenzene moieties for selective detection of Al3+ ions
TLDR
In this paper, two dyes, namely rhodamine and azobenzene, have been conjugated for the detection of Al3+ in aqueous ethanol.Abstract:
The high absorption coefficient, fluorescence quantum yield, photo stability and relatively long wavelengths of rhodamine dye have expanded its applicability as a promising fluorescent probe. In the present investigation, two dyes, namely rhodamine and azobenzene, have been conjugated for the detection of Al3+ in aqueous ethanol. The turn on fluorescence response of chemosensor L towards Al3+ is attributed to the inhibited PET (photo-induced electron transfer) and CHEF (chelation enhanced fluorescence) process along with the spirolactam (non-fluorescent) to ring-opened amide (fluorescent) process. The presence of the PET and CHEF process was corroborated by time-resolved photoluminescence study and the spirolactam ring opening was confirmed by 13C NMR and infrared spectroscopy. In the presence of Al3+, the opened spirolactam ring forms a 1 : 1 binding complex with the metal, which is supported by its high binding constant (Ka = 7.033 × 103 M−1). The limit of detection (LOD) and limit of quantification (LOQ) values are found to be 1.1 × 10−7 M and 3.6 × 10−7 M, respectively. The reversible recognition of Al3+ was also proved in the presence of Na2EDTA by both UV-Vis and fluorometric titration. The sensing behaviour of the chemosensor towards Al3+ was supported by DFT/TDDFT calculations.read more
Citations
More filters
Journal ArticleDOI
Application of real sample analysis and biosensing: Synthesis of new naphthyl derived chemosensor for detection of Al3+ ions.
Arjunan Saravanan,Selvaraj Shyamsivappan,Naveen Kumar Kalagatur,Thangaraj Suresh,Nikhil Maroli,N. Bhuvanesh,Ponmalai Kolandaivel,Palathurai Subramaniam Mohan +7 more
TL;DR: A new chemosensor (NANH) based on naphthyl moiety was synthesized with good selectivity and sensitivity towards Al3+ ions via the inhibition by operating through dual mechanisms like photo-induced electron transfer and excited-state intramolecular proton transfer.
Journal ArticleDOI
Aggregation-Induced Emission-Active Hydrazide-Based Probe: Selective Sensing of Al3+, HF2-, and Nitro Explosives.
TL;DR: The probe, H-PNAP, has successfully been applied to the detection of intracellular Al3+ and HF2– ions in the human breast cancer cell, MDA-MB-468.
Journal ArticleDOI
Recent advances in the development of fluorescent chemosensors for Al3.
TL;DR: In this article, the synthesis of recently reported aluminum sensors constructed from 2-hydroxy-1-naphthaldehyde, salicylaldehyde, rhodamine, coumarin and different metal-based MOFs is discussed.
Journal ArticleDOI
Solvent-Regulated Fluorimetric Differentiation of Al3+ and Zn2+ Using an AIE-Active Single Sensor
Bhriguram Das,Malay Dolai,Anamika Dhara,Avijit Ghosh,Subhabrata Mabhai,Ajay Misra,Satyajit Dey,Atanu Jana +7 more
TL;DR: In this article, a 2-naphthol-based fluorescent probe H2L has been used to sense and discriminate metal ions such as Al3+ and Zn2+ via solvent regulation.
Safty evaluation of dietary aluminum
TL;DR: Aluminum can be neurotoxic, when injected directly into the brains of animals and when accidentally introduced into human brains (by dialysis or shrapnel), and a study from Canada reports cognitive and other neurological deficits among groups of workers occupationally exposed to dust containing high levels of aluminum as mentioned in this paper.
References
More filters
Journal ArticleDOI
Density‐functional thermochemistry. III. The role of exact exchange
TL;DR: In this article, a semi-empirical exchange correlation functional with local spin density, gradient, and exact exchange terms was proposed. But this functional performed significantly better than previous functionals with gradient corrections only, and fits experimental atomization energies with an impressively small average absolute deviation of 2.4 kcal/mol.
Journal ArticleDOI
Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density
TL;DR: Numerical calculations on a number of atoms, positive ions, and molecules, of both open- and closed-shell type, show that density-functional formulas for the correlation energy and correlation potential give correlation energies within a few percent.
Journal ArticleDOI
Quantum Calculation of Molecular Energies and Energy Gradients in Solution by a Conductor Solvent Model
Vincenzo Barone,Maurizio Cossi +1 more
TL;DR: In this paper, a new implementation of the conductor-like screening solvation model (COSMO) in the GAUSSIAN94 package is presented, which allows Hartree−Fock (HF), density functional (DF) and post-HF energy, and HF and DF gradient calculations: the cavities are modeled on the molecular shape, using recently optimized parameters, and both electrostatic and nonelectrostatic contributions to energies and gradients are considered.
Journal ArticleDOI
A Spectrophotometric Investigation of the Interaction of Iodine with Aromatic Hydrocarbons
H. A. Benesi,Joel H. Hildebrand +1 more
TL;DR: In this paper, it was shown that the position of the absorption bands of iodine solutions in the visible region moved gradually from violet to brown, the shift being only small in the case of benzene in which the color of iodine is a red-violet.
Journal ArticleDOI
Energies, structures, and electronic properties of molecules in solution with the C-PCM solvation model.
TL;DR: The conductor‐like solvation model, as developed in the framework of the polarizable continuum model (PCM), has been reformulated and newly implemented in order to compute energies, geometric structures, harmonic frequencies, and electronic properties in solution for any chemical system that can be studied in vacuo.