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Highly efficient aerobic epoxidation of cyclic olefins in mild conditions by a novel binuclear manganese(II) complex containing N-(4-nitrophenyl)picolinamide ligand
, Article Catalysis Communications ; Volume 65 , May , 2015 , Pages 72-75 ; 15667367 (ISSN) ; Ghanbarpour, A ; Khavasi, H. R ; Sharif University of Technology
Elsevier
2015
Abstract
A novel binuclear Mn(II) complex based on a para-nitro substituted amidic ligand (N-(4-nitrophenyl)picolinamide) has been synthesized and characterized by X-ray crystallography. This complex shows a high degree of conversion and epoxide selectivity in Mukaiyama aerobic epoxidation reactions of cyclic olefins in mild conditions
Evaluation of relationship among filler amount, degree of conversion, and cytotoxicity: approaching performance enhancement novel design for dental Bis-GMA/UDMA/TEGDMA composite
, Article International Journal of Polymeric Materials and Polymeric Biomaterials ; Volume 66, Issue 16 , 2017 , Pages 844-852 ; 00914037 (ISSN) ; Akbari, B ; Najafi, F ; Abrishamkar, A ; Ramedani, A ; Yazdanpanah, A ; Sharif University of Technology
Abstract
Dental composites of A2 color using Bis-GMA, urethane dimethacrylate and triethyleneglycol dimethycrylate resins (70/20/10), and silica filler (70 wt%, 75 wt%, and 80 wt%), a hybrid of nano- and microsilica particles, are made and subjected to the following tests: Fourier transform infrared spectroscopy (FTIR), particle size analyzer, scanning electron microscope (SEM), and also cytotoxicity. FTIR results show that an increase in filler amount yields to a decrease in degree of conversion. Therefore, there should be a compromise between degree of conversion and the filler amount. SEM images manifest the uniformity of silica particles. It is shown from the cytotoxicity tests that as the...