Stable lead-halide perovskite quantum dots as efficient visible light photocatalysts for organic transformations

Abstract

Lead halide perovskite (LHP) based colloidal quantum dots (CQDs) have tremendous potential for photocatalysis due to their exceptional optical properties.

CsPbBr3 perovskite quantum dots as a visible light photocatalyst for cyclisation of diamines and amino alcohols: an efficient approach to synthesize imidazolidines, fused-imidazolidines and oxazolidines

“…DBI which is a relatively non-toxic bromine precursor yielded CsPbBr 3 QDs after reacting with lead oleate in a high boiling solvent [1octadecene (ODE)] at elevated temperature (100-200 °C). In our earlier work, 47,50 we reported molecular bromine as the bromide precursor to prepare a CsPbBr 3 QD-based photocatalyst. These QDs exhibited excellent photocatalytic activities.…”

“…The conventional transition metal 23 and organic dye 24 based visible light-induced photo-redox catalysis suffers from major pitfalls such as: the use of expensive metals, narrow absorption windows, fixed bandgaps, inferior charge separation capacity, mediocre product selectivity, poor airtolerance, non-reusability, etc. In contrast, CsPbBr 3 QDs exhibit superior photophysical properties such as excellent photon absorption/emission ability, [31][32][33] tunable band-edge alignment, 34 broad absorption window, 35 long lifetime of photoexcited states, 36 and robust separation/transfer of electron-hole pairs 37,38 which have been widely exploited in solar cells, 39,40 light-emitting diodes (LEDs), 41 detectors, 42 lasers, 32 photocatalysts, [43][44][45][46][47][48][49] etc. In this work, we report facile sp 3 C-H bond functionalisation of N-Me (alkyl) groups using a CsPbBr 3 QD based visible light photocatalyst (Fig.…”

Modern Trends in the Applications of Perovskites for Selective Organic Transformations

“…The in situ generated superoxide radical assists in the aromatization of these substrate molecules. The plausible mechanism and the substrate scope are depicted in the Figure 56 [89] …”

Lead‐Free Cs2AgSbCl6 Double Perovskite Nanocrystals for Effective Visible‐Light Photocatalytic C−C Coupling Reactions

“…Lead halide perovskite nanocrystals (NCs) have been utilized in versatile realms including solar cells, [1,2] lasers, [3] photodetectors, [4,5] and light‐emitting diodes, [6,7] benefiting from their remarkable optoelectronic and photophysical properties. Meanwhile, lead halide perovskite NCs have also shown great promise as efficient photocatalysts for organic reactions such as degradations, [8–19] polymerizations, [20–24] oxidations, [25–32] isomerizations, [33] aminomethylations, [34] aromatizations, [35] heterocyclizations, [36,37] and C−C, [36,38–42] C−O, [36] C−S, [43] S−S, or C−P bond‐forming reactions, [44] taking advantage of their high extinction coefficients, [45] excellent charge transport properties, [46] low exciton binding energy, [47,48] as well as tunable band gaps [49,50] . Additionally, compared with transition metal complexes or organic dyes, perovskite NCs as photocatalysts exhibit several appealing superiorities.…”