Publications

A series of scarce fulleropyrrolidin-2-ols were synthesized by the facile one-step reaction of [60] fullerene with inexpensive and readily accessible amines and 2,2-disubstituted acetaldehydes without the addition of valuable metal salts in moderate yields, comparable to those for most monoadducts reported previously. This strategy exhibits a broad substrate scope and excellent functional group tolerance. A plausible reaction pathway for the formation of fulleropyrrolidin-2-ols is proposed to elucidate the above reaction process.

CuO mesocrystals were synthesized by thermal decomposition of antlerite (Cu 3 (OH) 4 SO 4 ) formed as an intermediate by the reaction between CuSO 4 .5H 2 O and urea under specific experimental conditions. Antlerite possessing spindles of sea urchin‐like morphology was obtained via controlled hydrolysis process using ethylene glycol as a co‐solvent. Antlerite and CuO mesocrystals were characterized by X‐ray diffraction (XRD), fourier transform‐infrared spectrum (FT‐IR), thermo gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and energy dispersive spectroscopy (EDS). A probable mechanism for formation of such morphologies has been proposed. The photocatalytic and optical properties of CuO mesocrystals were also evaluated.

A new Schiff base named 1,1'-(-(naphthalene-2,3-diylbis(azanylylidene))bis (methanylylidene))bis(naphthalen-2-ol) (NDNA) derived from 2,3-naphthalenediamine and 2-hydroxy-1-naphthaldehyde was synthesized by condensation reaction and then characterized by spectroscopic techniques for structure elucidation. In addition to spectroscopic techniques, the molecular structure of NDNA was clearly confirmed by single-crystal X-ray diffraction study. A thin film of NDNA was fabricated onto glassy carbon electrode (GCE) using 5.0% ethanolic nafion solution as a conducting binder in order to develop the cationic electrochemical sensor (NDNA/nafion/GCE) for the sensing of heavy-metal cations in aqueous systems by electrochemical technique. This newly designed sensor exhibited higher sensitivity and selectivity towards antimony (Sb³⁺) in the presence of other interfering heavy metal cations, as well as long-term stability. Fascinating analytical parameters such as limit of detection (LOD = 0.075 nM, SNR of 3), limit of quantification (LOQ = 0.25 nM) and sensitivity (12.658 × 10^-4 μA μM^-1 cm^-2) were calculated from the calibration curve plot, which shows a linear dynamic range (LDR) of Sb³⁺ ion concentration from 0.1-10.0 mM. This work presents a new approach towards the development of sensitive, efficient as well as selective toxic cationic electrochemical sensors in the environmental and healthcare fields. Hence, this newly designed NDNA/nafion/GCE presents cost-effective and efficient outcomes and can be used as a practical substitute for the efficient detection and removal of Sb³⁺ ions from water samples.

In the title compound, C(12)H(16)N(2)O(6)S, the S atom adopts a distorted tetra-hedral geometry with an O-S-O angle of 119.76 (13)°. The nitro group is twisted by 35.34 (2)° with respect to the aromatic ring; it accepts an N-H⋯O hydrogen bond, resulting in a S(7) motif. In the crystal, N-H⋯O and O-H⋯O hydrogen bonds connect the mol-ecules into an infinite chain along the a axis. The methyl C atoms of the isopropyl group are disordered in a 1:1 ratio.

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

FeS₂ /carbon nanotube (CNT) nanocomposites were synthesized and immobilized on the surface of a glassy carbon electrode (GCE) in order to investigate the electrocatalytic conversion of 4-aminophenol (4-AP) into p-quinone in an aqueous medium. The reformed electronic properties (in terms of lowering of band-gap energy and charge-transfer resistance), as well as improved surface area, result in an enhanced redox reaction of 4-AP in the presence of FeS₂ -CNT NCs compared to that with FeS₂ alone. The 4-AP molecules undergo coupled two-proton and two-electron transfer quasi-reversible redox reactions with a symmetry factor of 0.55 and standard rate constant (k°) of 0.8 cm s^-1 . Here, quinone imine is generated as an intermediate which is later converted into quinone in an irreversible hydrolysis reaction. The best catalytic performance can be obtained at the pH value of 7.0.

In the title compound, C(9)H(7)N(3)O(3)S, the nitro and thia-zolidinone moieties are inclined with respect to the aromatic ring at dihedral angles of 9.57 (16) and 78.42 (4)°, respectively. In the crystal, N-H⋯O hydrogen bonding connects the mol-ecules along the c and a axes to form a two-dimensional polymeric network. A weak S⋯O inter-action [3.2443 (11) Å] and phenyl ring to phenyl ring off-set π⋯π stacking [with centroid-centroid separation of 3.6890 (7) Å and ring slippage of 1.479 Å] link the polymeric chains along the b and a axes, respectively.