A molybdate-incorporated cooperative catalyst: High efficiency in the assisted tandem catalytic synthesis of cyclic carbonates from CO2 and olefins

Oxidative carboxylation of olefins with CO2: environmentally benign access to five-membered cyclic carbonates

“…In this context, Han and Li have reported the high yielding synthesis of styrene carbonates 32 by epoxidation of the corresponding styrenes 31 employing TBHP as an oxidant in the presence of only 0.1 mol% of Cu 3 (m 3 -OH) 2 (4,4 0 -BPY) (MoO4) 2 (CuMo-BPY, BPY ¼ 4,4 0 -bipyridine) as a MOF-based catalyst followed by subsequent CO 2 (5 atm) insertion in the presence of TBAB (Scheme 23). 51 However, the authors found some limitations in the protocol when they attempted to epoxidize the bulky olens such as 3,5-di-tertbutyl-4 0 -vinyl biphenyl. Unfortunately, in these cases, unsatisfactory yields were observed.…”

A Polyoxometalate-Based Inorganic Porous Material with both Proton and Electron Conductivity by Light Actuation: Photocatalysis for Baeyer–Villiger Oxidation and Cr(VI) Reduction

“…Moreover, energy dispersive spectroscopy (EDS) shows the specific distribution of individual elements in same block of the sample. The different intensities of colors are assumed to be proportional to the metal composition in the same block of the sample . The results show that these elements are homogeneously distributed in the framework of the Co 6 Zn 5 W 19 crystal.…”

“…The different intensities of colors are assumed to be proportional to the metal composition in the same block of the sample. 27 The results show that these elements are homogeneously distributed in the framework of the Co 6 Zn 5 W 19 crystal.…”

Urea and Thiourea-Functionalized, Pyridinium-Based Ionic Polymers Convert CO2 to Cyclic Carbonate under Mild Conditions

“…Then, through the reaction of PIP with 3,5-bis(trifluoromethyl)phenylisocyanate and 3,5bis(trifluoromethyl)phenylisothiocyanate under ambient conditions, PIP-thiourea and PIP-urea containing dual hydrogenbond donors were fabricated, respectively. The above polymers are all insoluble in both water and common organic solvents, and they were further characterized by Fourier transform infrared spectroscopy (FTIR), solid-state cross-polarization magic-angle spinning (CP-MAS) 13 C NMR, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), and thermogravimetric analysis (TGA).…”

“…As shown in Figure 1a, the characteristic absorption peaks in the ranges from 1620, 1490, 1440, and 800 to 900 cm −1 proved the existence of aromatic rings, while it was also observed that the It should be noted that the observed O atoms may partly originate from chemisorbed water, which is consistent with the FT-IR study. To further examine the structural features of the PIP, solid-state 13 C CP/MAS NMR spectroscopy was performed. As shown in Figure 2, a wide range of chemical shifts appearing in the region between 100 and 150 ppm is attributed to the carbon atoms of the benzene and pyridine rings in the polymer, whereas the peak at 90 ppm is attributed to the ethynyl carbon in the polymer, which altogether further validates the successful synthesis of PIP.…”