Two transition-metal-modified Nb/W mixed-addendum polyoxometalates for visible-light-mediated aerobic benzylic C–H oxidations

Visible-Light-Driven Oxidation of Amines to Imines in Air Catalyzed by Polyoxometalate–Tris(bipyridine)ruthenium Hybrid Compounds

“…Polyoxometalates (POMs), as inorganic metal oxide clusters with excellent redox-active properties and charge-transfer properties, have significant applications for various kinds of photocatalytic reactions, − such as water splitting, CO 2 reduction, and organic transformation. However, most POMs can merely adsorb high-energy UV light, − so their practical application was inevitably restricted.…”

Visible-light-mediated aerobic Ritter-type C–H amination of diarylmethanes using DDQ/tert-butyl nitrite

“…Considering the strive for greener chemical production, molecular oxygen (O2) is the most ideal oxidant due to its inexpensive, environmentally friendly characteristics. 15,16 In the past 10 years, important advances have been made in catalytic aerobic oxidation of C(sp 3 )-H bonds, [17][18][19][20][21] however, to the best of our knowledge, there is no aerobic Ritter type C-H amination method reported to date. Therefore, developing an environmentally friendly and lowcost metal-free catalytic system for C-H amination is highly desirable.…”

“…Considering the strive for greener chemical production, molecular oxygen (O 2 ) is the most ideal oxidant as it is inexpensive and environmentally friendly. 15,16 In the past 10 years, important advances have been made in the catalytic aerobic oxidation of C(sp 3 )–H bonds; 17–21 however, to the best of our knowledge, there is no aerobic Ritter type C–H amination method reported to date.…”

A Zr-added Dawson-type poly(polyoxometalate)

“…Polyoxometalates (POMs), a unique class of anionic metal-oxo clusters based on early transition metals (Mo, W, V, Nb, Ta), have attracted much attention because of not only their structural diversities but also their potential applications in catalysis, magnetism, medicine and electronic materials. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] Lacunary POM fragments possess well-defined vacant sites that can induce transition metal (TM) ions to form TM-added POMs (TMAPs), which have usually been referred to as TMsubstituted POMs (TMSPs) in the past decades. [17][18][19][20] In fact, the term TMSPs in the literature is a wrong usage and cannot reflect the real reaction mechanism because addition and substitution in organic chemistry are two different concepts and have different reaction pathways, i.e.…”