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21.
Nanocrystalline zinc telluride (ZnTe) thin films were prepared by using successive ionic layer adsorption and reaction (SILAR) method from aqueous solutions of zinc sulfate and sodium telluride. The films were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis and optical absorption measurement techniques. The synthesized ZnTe thin films were nanocrystalline with densely aggregated particles in nanometer scale and were free from the voids or cracks. The optical band gap energy of the film was found to be thickness dependent. The elemental chemical compositional stoichiometric analysis revealed good Zn:Te elemental ratio of 53:47. 相似文献
22.
Waghmare M. A. Naushad Mu. Pathan H. M. Ubale A. U. 《Journal of Solid State Electrochemistry》2017,21(9):2719-2723
Journal of Solid State Electrochemistry - The present work reports the first demonstration of zirconium oxide (ZrO2) as a photoanode and rose bengal (RB) as a sensitizer. ZrO2 photoanode films were... 相似文献
23.
Shafeek A.R. Mulla Tarek A. Salama Mohsinkhan Y. Pathan Suleman M. Inamdar Santosh S. Chavan 《Tetrahedron letters》2013,54(7):672-675
A solvent-free, environmentally clean, mild, and simple one-pot multi-component protocol has been developed for the efficient synthesis of 1-amido- and 1-carbamato-alkyl naphthols/phenols in excellent yields via one-pot three-component condensation of various aldehydes, amides/carbamates/urea, and naphthols/phenols using ethylammonium nitrate (EAN) as a reusable ionic liquid catalyst under neat reaction condition at ambient temperature. 相似文献
24.
25.
Naziyanaz Pathan Parvez Ali Anjali Rahatgaonkar Khalid Al-Mousa 《Journal of heterocyclic chemistry》2021,58(8):1675-1689
A series of novel ethyl-l, 1, 2, 3, 6-tetrahydro-4-methyl-1-(6-methyl-4-oxo-4H-chromene-2-yl)-2-oxo/thioxo-6-phenyl pyrimidine-5-carboxylate compounds ( 2a–2k ) were synthesized using I2/DMSO as a competent and cost-effective catalyst in one pot green solvent system from corresponding chalcones ( 1a–1k ) in better yields. IR, 1H-NMR, 13C-NMR, Mass, and X-ray diffraction spectroscopic techniques were used for the characterization of newly synthesized compounds. All the compounds were tested for in-vitro antibacterial activities against gram-positive and gram-negative bacteria like Staphylococcus aureus, Salmonella abony, Staphylococcus epidermidis, and Escherichia coli. Antifungal activities were also performed against Candida albicans and Aspergilus niger. It was found that the presence of electron withdrawing group on the aromatic ring attached to chromone ring increases the antibacterial activities ( 2g , 2h , and 2k ); while the presence of electron releasing groups decreases activities. The presence of electron donating groups (─OCH3, ─Cl), on the phenyl ring attached to pyrimidine skeleton influenced negatively for the antibacterial activities. 相似文献
26.
Abdulrahman W. Pathan 《Physics and Chemistry of Liquids》2017,55(2):179-185
Using time-domain reflectometry (TDR) technique, we have measured the complex permittivity of tertiary butyl alcohol (TBA)–water mixtures in the frequency range of 10 MHz–30GHz, at temperatures 15°C, 20°C and 25°C. The complex permittivity of TBA–water mixture shows Debye-type behaviour. The dielectric parameters such as dielectric constant and relaxation time were obtained from the complex permittivity spectra. The Kirkwood correlation factor and Bruggeman factor have also been determined to investigate inter- and intramolecular interaction among associating liquids. 相似文献
27.
Arif V. Shaikh Rajaram S. Mane Oh-Shim Joo Sung - Hwan Han Habib M. Pathan 《Journal of Solid State Electrochemistry》2017,21(9):2517-2530
This review gives brief information of experimental conditions employed by different researchers for deposition of cadmium selenide (CdSe) thin films. For the films synthesized at room temperature, films should be annealed and etched to increase the solar cell efficiency. A photoelectrochemical study revealed that values of fill factor and efficiency of CdSe thin films deposited on fluorine-doped tin oxide-coated glass substrates exhibited maximum value compared to the film deposited on titanium and stainless steel substrates. This review will be helpful to researchers entering in field to understand basics about the electrodeposition of CdSe and its development towards next-generation photovoltaics. 相似文献
28.
1-Phenyl-3-methyl-4-touloyl-5-pyrazolone (ligand) was synthesized and used to prepare an oxovanadium(IV) complex. The complex was characterized by single-crystal X-ray analysis and various spectroscopic techniques. The single-crystal X-ray analysis of the complex shows that the ligands are coordinated in a syn configuration to each other and create a distorted octahedral environment around the metal ion. A heterogeneous catalyst comprising an oxovanadium(IV) complex and hydrous zirconia was synthesized, characterized by various physicochemical techniques, and successfully used for the solvent-free oxidation of styrene. The influence of the reaction parameters (percent loading, molar ratio of the substrate to H(2)O(2), amount of catalyst, and reaction time) was studied. The catalyst was reused three times without any significant loss in the catalytic activity. 相似文献
29.
Borhade N Pathan AR Halder S Karwa M Dhiman M Pamidiboina V Gund M Deshattiwar JJ Mali SV Deshmukh NJ Senthilkumar SP Gaikwad P Tipparam SG Mudgal J Dutta MC Burhan AU Thakre G Sharma A Deshpande S Desai DC Dubash NP Jain AK Sharma S Nemmani KV Satyam A 《Chemical & pharmaceutical bulletin》2012,60(4):465-481
In continuation of our efforts to discover novel nitric oxide-releasing non-steroidal anti-inflammatory drugs (NO-NSAIDs) as potentially "Safe NSAIDs," we report herein the design, synthesis and evaluation of 21 new NO-NSAIDs of commonly used NSAIDs such as aspirin, diclofenac, naproxen, flurbiprofen, ketoprofen, sulindac, ibuprofen and indomethacin. These prodrugs have NO-releasing disulfide linker attached to a parent NSAID via linkages such as an ester (compounds 9-16), a double ester (compounds 17-24), an imide (compounds 25-30) or an amide (compounds 31-33). Among these NO-NSAIDs, the ester-containing NO-aspirin (9), NO-diclofenac (10), NO-naproxen (11), and the imide-containing NO-aspirin (25), NO-flurbiprofen (27) and NO-ketoprofen (28) have shown promising oral absorption, anti-inflammatory activity and NO-releasing property, and also protected rats from NSAID-induced gastric damage. NO-aspirin compound 25, on further co-evaluation with aspirin at equimolar doses, exhibited comparable dose-dependent pharmacokinetics, inhibition of gastric mucosal prostaglandin E(2) (PGE(2)) synthesis and analgesic properties to those of aspirin, but retained its gastric-sparing properties even after doubling its oral dose. These promising NO-NSAIDs could therefore represent a new class of potentially "Safe NSAIDs" for the treatment of arthritic pain and inflammation. 相似文献
30.
Pathan M Akoka S Giraudeau P 《Journal of magnetic resonance (San Diego, Calif. : 1997)》2012,214(1):335-339
Ultrafast techniques enable the acquisition of 2D NMR spectra in a single scan. In this study, we propose a new ultrafast experiment designed to record hetero-nuclear (1)H-(13)C J-resolved spectra in a fraction of a second. The approach is based on continuous constant-time phase modulated spatial encoding followed by a J-resolved detection scheme. An optional isotopic filter is implemented to remove the signal arising from (1)H bound to (12)C. While the most evident application of the technique proposed in this paper is the direct measurement of one bond scalar (13)C-(1)H couplings for structural elucidation purposes, it also offers interesting potentialities for measuring (13)C isotopic enrichments in metabolic samples. The main features of this methodology are presented, and the analytical performances of the ultrafast hetero-nuclear J-resolved pulse sequence are evaluated on model samples. 相似文献