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Badral Gansukh Qiuyue Zhang Zygmunt Flisak Tongling Liang Yanping Ma Wen-Hua Sun 《应用有机金属化学》2020,34(4):e5471
The five unsymmetrical 2-[1-(2,4-dibenzhydryl-6-chlorophenylimino)ethyl]-6-[1-(arylimino)ethyl]pyridine compounds (aryl: 2,6-Me2Ph L1 , 2,6-Et2Ph L2 , 2,6-iPr2Ph L3 , 2,4,6-Me3Ph L4 and 2,6-Et2–4-MePh L5 ) were prepared and characterized with FT-IR and 1H/13C NMR spectroscopy as well as elemental analysis. The treatment of L1 – L5 with CrCl3·3THF affords the corresponding chromium chloride complexes ( Cr1 – Cr5 ) in excellent yields. The molecular structures of Cr2 and Cr3 characterized by X-ray diffraction show a distorted octahedral geometry with three nitrogen atoms and three chlorine atoms around the metal center. On activation with either MAO or MMAO, Cr1 – Cr5 collectively display high activity (up to 14.96 × 106 g (PE) mol−1 (Cr) h−1 at 60 °C) affording highly linear polyethylene with low molecular weight distribution (Mw/Mn) ranging from 1.06 to 2.81. An in-depth catalytic evaluation of Cr1 was conducted in order to investigate how the cocatalyst type and its amount, reaction temperature and polymerization time affect the catalytic activities and polymer properties. 相似文献
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Enkhtaivan Gansukh Vimala Anthonydhason Somang Jung Doo Hwan Kim Manikandan Muthu Judy Gopal Sechul Chun 《Journal of Cluster Science》2018,29(6):933-941
Nanotechnology has impacted every aspect of human life and the environment. The raising concern against influenza outbreaks is an ongoing issue. With the current drugs and natural remedies, some amount of resolution has been reached. Yet, nothing conclusive has been achieved. With every resource tapped, it is now time to combine strategies. This review highlights the low enthusiasm in this area, where not much has been probed into employing nanomaterials into influenza research. The achievements made through the intervention of nanotechnology into anti influenza research, has been surveyed in this review. Except for a few, not much progress was evidenced. Although significant progress has been achieved with nano inputs, yet nothing much has been done in this direction. This review emphasizes the need to combine strategies and find new remedies against influenza virus using nano platforms. New directions and future perspectives for accessing the nano inputs for combating the influenza issues have been discussed. 相似文献
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Badral Gansukh Qiuyue Zhang Chantsalnyam Bariashir Arumugam Vignesh Yanping Ma Tongling Liang Wen-Hua Sun 《Molecules (Basel, Switzerland)》2020,25(23)
By dealing CrCl3∙3THF with the corresponding ligands (L1–L5), an array of fluoro-substituted chromium (III) chlorides (Cr1–Cr5) bearing 2-[1-(2,4-dibenzhydryl-6-fluoro- phenylimino)ethyl]-6-[1-(arylimino)ethyl]pyridine (aryl = 2,6-Me2Ph Cr1, 2,6-Et2Ph Cr2, 2,6-iPr2Ph Cr3, 2,4,6-Me3Ph Cr4, 2,6-Et2-4-MePh Cr5) was synthesized in good yield and validated via Fourier Transform Infrared (FT-IR) spectroscopy and elemental analysis. Besides the routine characterizations, the single-crystal X-ray diffraction study revealed the solid-state structures of complexes Cr2 and Cr4 as the distorted-octahedral geometry around the chromium center. Activated by either methylaluminoxane (MAO) or modified methylaluminoxane (MMAO), all the chromium catalysts exhibited high activities toward ethylene polymerization with the MMAO-promoted polymerizations far more productive than with MAO (20.14 × 106 g (PE) mol−1 (Cr) h−1 vs. 10.03 × 106 g (PE) mol−1 (Cr) h−1). In both cases, the resultant polyethylenes were found as highly linear polyethylene waxes with low molecular weights around 1–2 kg mol−1 and narrow molecular weight distribution (MWD range: 1.68–2.25). In general, both the catalytic performance of the ortho-fluorinated chromium complexes and polymer properties have been the subject of a detailed investigation and proved to be highly dependent on the polymerization reaction parameters (including cocatalyst type and amount, reaction temperature, ethylene pressure and run time). 相似文献
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Judy Gopal Vimala Anthonydhason Manikandan Muthu Enkhtaivan Gansukh Somang Jung Sechul Chul 《Natural product research》2019,33(6):906-910
These are the days when one would go online first seeking home remedies before seeing a doctor. Apple cider vinegar (ACV) is one such popular yet scientifically under-validated remedy. Our results prove the unequivocal antimicrobial activity of ACV to be true at full strength concentrations. However, the activity cannot be generalised because although strong antibacterial activity was observed at 25% concentrations, in terms of antifungal activity, yeasts, especially Candida were found to be less susceptible. The antimicrobial/antioxidant properties are ascertained to the total phenolic contents of ACV, as confirmed by our characterisation of the bioactive compounds and antioxidant activity. When checking for its cytotoxicity, ACV exhibited toxicity even at concentrations as low as 0.7%. These results indicate that there is no question of generalising the idea of ACV usage, instead more in vitro and in vivo validations are necessary in order to precisely weigh the pros and cons of ACV. 相似文献
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