Publications

Pyridinium 5-[(1,3-diethyl-6-hydroxy-4-oxo-2-thioxo-1,2,3,4-tetrahydropyrimidin-5-yl)(2-methoxyphenyl)methyl]-1,3-diethyl-4,6-dioxo-2-thioxopyrimidin-5-ide

1,3-Diethyl-2-thio-barbituric acid reacts with 2-anisaldehyde to form the Michael addition product 2-anisylbis(1,3-diethyl-2-thio-barbitur-5-yl)methanate, which crystallizes as the title pyridin-ium salt, C(5)H(6)N(+)·C(24)H(29)N(4)O(5)S(2) (-), when it reacts with the pyridine used to catalyse the reaction. There are two independent ion pairs in the crystal structure. The anion features a methine C atom connected to three six-membered rings; one of the rings carries a hydr-oxy group, which engages in hydrogen bonding with the carbonyl group belonging to another ring. The monoclinic unit cell emulates an ortho-rhom-bic unit cell, and is a twin with a minor twin component of 35%.

Green Synthesis, Physicochemical and Polarity Studies of Some Novel Biologically Active Donor Acceptor Chromophores

Chalcones were synthesized by the reaction of acetyl ferrocene and corresponding aldehhyde under microwave irradiation. Results obtained from spectroscopic (FT-IR, 1 H NMR, 13 C NMR, EI-MS) and elemental analysis of synthesized compounds was in agreement with their chemical structures. UV-visible and fluorescence spectroscopy measurements provided that compound 1 and 2 are good absorbent and fluorescent. Fluorescence polarity study demonstrated that these compounds were sensitive to the polarity of the microenvironment provided by different solvents. In addition, spectroscopic and physicochemical parameters, including electronic absorption, extenction coefficient, Stokes shift, oscillator strength and transition dipole moment, were investigated in order to explore the analytical potential of synthesized compounds. The antibacterial activity of the compound 1 and 2 were first studied in vitro by the disk diffusion assay against two Gram-positive and two Gram-negative bacteria. The minimum inhibitory concentration was then determined with the reference of standard drug chloramphenicol.

Green-synthesis, characterization, photostability and polarity studies of novel schiff base dyes using spectroscopic methods

Preparation, characterization, photostability and polarity studies of novel Schiff base dyes using spectroscopic methods were achieved. The Schiff base dyes were prepared by the reaction of salicylaldehyde/2-Hydroxy-1-naphthaldehyde with aminophenazone under microwave irradiation. The spectroscopic (FT-IR, 1H NMR, 13C-NMR, Mass) studies and elemental analyses were in good agreement with chemical structure of synthesized compounds. In addition, UV-Vis and fluorescence spectroscopic experiments showed that these dyes are good absorbent and fluorescent. Based on the photostability study of these dyes, minimal to no loss in fluorescence intensities of 4-[(2-Hydroxy-benzylidene)-amino] 1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one (D1) (6.14%) and 4-[(2-Hydroxy-naphthalen-1-ylmethylene)-amino]-1,5-dimethyl-2-phenyl-1,2-dihydro-pyrazol-3-one (D2) (2.95%) was observed with an increase in the exposure time using time-based fluorescence steady-state experiments. These studies also inferred that these Schiffbase dyes have a high photostability against photobleaching. In addition, Dye 2 is found to be more sensitive than Dye 1 to the polarity of the microenvironment provided by different solvents based on the results of fluorescence polarity studies.

2-Amino-4-(4-chlorophenyl)-5,6-dihydrobenzo[<i>h</i>]quinoline-3-carbonitrile–3-amino-1-(4-chlorophenyl)-9,10-dihydrophenanthrene-2,4-dicarbonitrile (1/4)

The asymmetric unit of the 1:4 title co-crystal of 2-amino-4-(4-chloro-phen-yl)-5,6-dihydro-benzo[h]quinoline-3-carbonitrile and 3-amino-1-(4-chloro-phen-yl)-9,10-dihydro-phenanthrene-2,4-dicarbonitrile, 0.2C(20)H(14)ClN(3)·0.8C(22)H(14)ClN(3), has the atoms of the fused-ring system and those of the amino, cyano and chloro-phenyl substitutents overlapped. The fused-ring system is buckled owing to the ethyl-ene linkage in the central ring. There are two independent overlapped mol-ecules in the asymmetric unit. In one independent mol-ecule, the two flanking aromatic rings are twisted by 24.4 (1)° and the ring of the chloro-phenyl substituent is twisted by 87.3 (1)° relative to the amino- and cyano-bearing aromatic ring. In the second mol-ecule, the respective dihedral angles are 26.1 (1) and 57.8 (1)°. The two independent mol-ecules are linked by N-H⋯N hydrogen bonds into dimers.

Natural polymers supported copper nanoparticles for pollutants degradation

ChemInform Abstract: Perovskite Solar Cells: Influence of Hole Transporting Materials on Power Conversion Efficiency

Abstract Review: 89 refs.

CCDC 968346: Experimental Crystal Structure Determination

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.

Selective detection of gold(III) ions based on codoped MnO2–SnO2 nanocubes prepared by solution method

<i>N</i>,<i>N</i>′-Bis[(<i>E</i>)-1-(thiophen-3-yl)ethylidene]ethane-1,2-diamine

The complete mol-ecule of the title compound, C(14)H(16)N(2)S(2), is generated by a crystallographic inversion centre. The thio-phene residue is close to being coplanar with the imine group [C-C-C-N torsion angle = 6.5 (2)°], and the conformation about the imine C=N bond [1.281 (2) Å] is E. In the crystal, the three-dimensional architecture is consolidated by C-H⋯N, C-H⋯π and S⋯S [3.3932 (7) Å] inter-actions.

Critical Analysis of Healthcare Policy Reform: Addressing Systemic Inequities and Advancing Universal Health Coverage

Healthcare policies have now emerged as important programs globally, especially considering various systemic issues that affect health inequalities for the poor. Healthcare policy reform has now become a critical consciousness globally. As mentioned in the section of the paper, goals, and objectives, following this brief discussion on the targeted inefficiencies and inequities seeking UHC reforms, this paper aims to offer a critical analysis of the reforms that aimed at fulfilling the above-mentioned goals of these changes. There is an implementation gap in UHC globally even though it was designed to ensure that every human being gets access to healthcare services when needed, but they should not be forced to pay for the services Lime and Thorlacius (2017). This paper analyzes the differences between nations with insufficient systems by looking at successful UHC models and comparing them to those of the US, such as Canada, the UK, and Brazil. It also examines new directions in healthcare policies based on new technologies, including digital health, PPPs, and other financing schemes that have been demonstrably effective in removing obstacles to UHC. In assessing these issues about contemporary humanitarian policies and health status, this paper outlines the opportunities and challenges in advancing global healthcare equity. That is why the goal is to outline additional policy reforms based on the literature analysis that can help eliminate inequalities regarding healthcare accessibility, quality, and efficiency.

One-step synthesis of Ag nanoparticles-decorated reduced graphene oxide and their application for H2O2 detection

Synthesis and description of intermolecular interactions in new sulfonamide derivatives of tranexamic acid

Photo-thermoelectric cells based on pristine α-Al2O3 co-doped CdO, CNTs and their single and bi-layer composites with silicone adhesive

Synthesis, spectral behaviour and photophysics of donor–acceptor kind of chalcones: Excited state intramolecular charge transfer and fluorescence quenching studies

Fabrication of hybrid PVA-PVC/SnZnOx/SWCNTs nanocomposites as Sn²⁺ ionic probe for environmental safety

New hybrid nanocomposites (NCs) based poly(vinyl alcohol) (PVA), poly(vinyl chloride) (PVC), mixed SnZnOx nanocube and single walled carbon nanotube (SWCNTs) have been fabricated by solution dispersion method with the help of ultrasonic irradiation. A fixed amount of SnZnOx and different loading of SWCNTs nanoparticles (NP)s are added successfully during the fabrication process. The SnZnOx nanocubes are synthesized using the wet-chemical procedure. Here, results from XRD, FTIR, TEM, and FE-SEM techniques are examined to provide the fundamental information necessary to fabricate PVA-PVC and their NCs. Morphology findings of SnZnOx and SWCNTs incorporated in the PVA-PCV matrix prove the appearance of nanoparticle in the films. Additionally, thermal and electrochemical behavior of the fabricated NCs have been studied by thermogravimetric technique and electrochemical measurements, respectively. An effectual electrochemical sensor using PVA-PVC/SnZnOx/SWCNTs(3)/binder/GCE assembly selective to Sn2+ ion is fabricated with conductive nafion (5%). The PVA-PVC/SnZnOx/SWCNTs(3) NCs give a good detection of Sn2+ ion and it shows a linear response over the large linear dynamic range (LDR) concentration of 0.1 nM ~ 0.01 mM . The linear relationship slope of (current vs. concentration) is examined to calculate the sensitivity (42.11 µAµM−1cm−2) and detection limit (44.36 ± 2.22 pM) of proposed Sn2+ ionic sensor probe. It has been significantly detected the selective Sn2+ ion from environmental real samples. The insights stated in this manuscript provide a clear understanding of the variable keys involved in the improvement of heavy metal ionic sensor for the application of safety environment in broad scale.

Impact of key geochemical parameters on the highly efficient sequestration of Pb(II) and Cd(II) in water using g-C3N4 nanosheets

2,4,5-Trimethoxybenzaldehyde monohydrate

In the title compound, C(10)H(12)O(4)·H(2)O, the 2,4,5-trimeth-oxy-benzaldehyde mol-ecule is almost planar (rms deviation = 0.0183 Å). There is an R(1) (2)(5) ring motif due to O-H⋯O hydrogen bonding. In the crystal, the mol-ecules are stabilized in the form of one-dimensional polymeric chains extending along [010] due to O-H⋯O hydrogen bonding with adjacent water mol-ecules. The H atoms involved in inter-molecular hydrogen bonding are disordered over two sets of sites of equal occupancy.

Erratum to “Assessment of long-range corrected functionals for the prediction of non-linear optical properties of organic materials” [Chem. Phys. Lett. 575 (2013) 122–125]