Herein, the evaluation of four commercial alkoxysilanes and two laboratory synthesized novel diethoxysilacycloalkanes as external donors towards propylene polymerization has been done.
Superbenzene porphyrin conjugates find wide range of applications from nonlinear optical materials to semiconductors. Herein, we report the synthesis and characterization of 5,15-bis(3,5-di-tert-butylphenyl)-10,20-bis-(pentaphenylphenyl)phenylporphyrin and its Zinc-metallated complex. Oxidative planarization of 5,15-bis(3,5-di-tert-butylphenyl)-10,20-bis(pentaphenylphenyl)phenylporphyrin and its metallated complex was carried out by using NOBF 4 as an oxidizing agent. The formation of superbenzene porphyrin conjugates validates its Scholl type reactions. The laboratory-synthesized porphyrin conjugates were characterized experimentally using spectroscopic techniques such as 1 H NMR, 13 C NMR, electron spin resonance, and ultraviolet−visible spectroscopy for structural conformation. In addition, density functional theory calculations were carried out to validate the experimental results. The theoretical and experimental results show that the 4-(pentaphenylphenyl)phenyl ligand increases the stability, optical properties, and rate of planarization of synthesized porphyrins. The conjugates exhibited intense and distant electronic communication between two hexabenzocoronene sites, taking advantage of porphyrin as a π-spacer. The π-radical cation has also been found to be an intermediate in oxidative C−C bond formation. NICS calculations support such a conclusion.
Herein, we report greener and sustainable synthesis of a green fuel additive using protic ionic liquid (PIL) catalysts from biomass derived 5-HMF and 1,3-propanediol.
The fundamental mechanism and reaction kinetics of TEMPO (2,2,6,6-tetramethyl piperidin-1-yl)oxyl) initiated thiol-ene reaction between benzyl mercaptan and variable enes (divinyl sulfone, n-butyl acrylate, N,N-dimethylacrylamide, vinyltriethoxysilane and 1-dodecene), in the presence...
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