Thermally activated delayed fluorescence emitters with small energy gap between the triplet and singlet (ΔEST), TXO-PhCz TXO-TPA, have been successfully synthesized by combining a hole-transporting TPA/PhCz moiety an electron-transporting TXO moiety. Both compounds display efficient solid-state luminescence up-conversion of to singlet. OLEDs based on them exhibt high performance up 21.5%, which is among best reported for OLEDs.

An in-vacuum low-temperature annealing process is developed to make high-density formamidine-based perovskite films. When the temperature optimized, efficiency increases 21.32%, highest value for a PSC fabricated with vacuum deposition.

Marine biofouling is one of the most significant challenges hindering practical uranium extraction from seawater. Single atoms have been widely used in catalytic applications because their remarkable redox property, implying that single atom highly capable catalyzing generation reactive oxygen species (ROS) and acts as an anti-biofouling substance for controlling biofouling. In this study, Co loaded polyacrylamidoxime (PAO) material, PAO-Co, fabricated based on binding ability amidoxime...

MTXSFCz with thermally activated delayed fluorescence is synthesized. Orange and red phosphorescent organic light-emitting diodes (PHOLEDs) low efficiency roll-off exhibit external quantum efficiencies (EQE) up to 11.8% 15.6%. The efficient upconversion from triplet singlet of the host reduces density thus affords a PHOLEDs.

A novel palladium(0)-catalyzed dearomatizing [2+2+1] spiroannulation of 1-bromo-2-naphthols with aryl iodides and alkynes was developed for the rapid assembly spiro[indene-1,1'-naphthalen]-2'-ones. This three-component cascade reaction realized through consecutive Catellani-type C-H activation, unsymmetrical biaryl coupling, alkyne migratory insertion, arene dearomatization. The potential utility our method is illustrated by one-step construction polycyclic skeletons dalesconols B from...

Abstract A novel palladium(0)‐catalyzed dearomative cyclization reaction of bromophenols with (1, n )‐diynes has been developed for building two new types tricyclic architectures containing a quaternary carbon center. This method employs inexpensive bromophenols, and easily accessible tethered diynes. It exhibits broad substrate scope tolerates various functional groups. Preliminary results commercially available chiral ligands indicate that enantioselective variants are feasible both processes.

Abstract The growing demand for uranium driven by nuclear power development necessitates the creation of macroscale, cost‐effective, and efficient adsorbents extraction from seawater, a challenge yet to be fully addressed. Amidoxime‐based hydrogel are promising candidates but suffer performance limitations due bound water obstructing pore channels impeding uranyl ion migration. Herein, thick macro‐channel poly(amidoxime)‐polyvinyl alcohol membrane (MCHM) with double cross‐linking structure...

A novel rhodium-catalyzed C–C bond formation was developed to construct biaryls through unreactive aryl C–S cleavage of thioethers with boroxines. This protocol provided a supplemental method traditional Suzuki–Miyaura coupling.

N,N-Dimethylaminomethyl ferrocenium could be generated in situ and served as a terminal oxidant for Pd-catalyzed directly dehydrogenative annulations of N,N-dimethylaminomethyl ferrocene internal alkynes. This procedure utilized the redox activity avoided adding an oxidant. A series highly arylated naphthalenes functionalized by were obtained 53–81% yields.

The asymmetric total syntheses of cephalotaxus C19 diterpenoids, bearing a unique cycloheptene A ring with chiral methyl group at C-12, were disclosed based on universal strategy. Six members, including cephinoid P, cephafortoid A, 14-epi-cephafortoid and fortalpinoids M-N, accomplished for the first time. concise approach relies two crucial steps: (1) Nicholas/Hosomi-Sakurai cascade reaction was developed to efficiently generate group; (2) an intramolecular Pauson-Khand followed facilitate...

A novel Pd(0)-catalyzed intermolecular carbocyclization of phenol-derived biaryls with 1,3-dienes has been implemented through a sequence oxidative addition to the C–I bond, regioselective olefin insertion, and allylative dearomatization. This method provides broad range attractive spirocyclic compounds bearing two contiguous tertiary/quaternary carbon centers in good yields excellent chemoselectivity regioselectivity. Moreover, preliminary results indicate that asymmetric control this...

As an encapsulation material, glass has been used in electronic encapsulation, aerospace, and fuel cell applications due to its ease of fabrication, heat resistance, stability. Thereinto, shear strength is one the significant criteria for evaluating sealing glass. Nevertheless, frequently influenced by wettability interfacial interactions. Thus, effect Na2O content on characteristic temperature, wettability, crystallization was investigated promote strength. Due fluxing Na2O, temperature...

Herein, we described metal- and base-free cross-coupling reactions of boronic acids with dioxazolones isocyanates to selectively synthesize various amides. These occured processes 1,2- 1,3-migrations to...

A palladium(0)-catalyzed dearomatizing [3+2] spiroannulation of naphthalene-based biaryls with arynes has been developed for the rapid construction spirofluorene architectures. This reaction was realized by carbopalladation aryne to generate an arylpalladium species, followed termination naphthalene dearomatization, which is a sharp contrast conventional C–H functionalization approach. Mechanistic studies revealed that arene dearomatization might take place through 5-exo-trig and...

The development of new methods for the rapid assembly spirocyclic frameworks with high molecular complexity is always great importance organic syntheses. In this perspective, we endeavour to cover recent achievements from our group in construction synthetically valuable spirocyclohexadienones easily accessible phenol-derived biaryls using a transition-metal-catalyzed C-H activation/dearomatization strategy. key feature these cooperative reactions simultaneous bond activation and aromaticity...

Abstract High color quality and the removal of blue hazard are important for lighting applications. Thermally activated delayed fluorescence (TADF) materials can achieve ≈100% internal quantum efficiency with low cost. However, it is still challenging to high‐color‐quality blue‐hazard‐free TADF‐based white organic light‐emitting devices (WOLEDs). Here, a bluish‐green TADF material named 10,10′‐[5‐(6‐[1,1′‐biphenyl]‐4‐yl‐2‐phenyl‐4‐pyrimidinyl)‐1,3‐phenylene] bis...

Highly efficiency nondoped thermally activated delayed fluorescence (TADF) organic light emitting diodes (OLEDs) with multiquantum wells structure were demonstrated. By using an layer seven quantum wells, the TADF OLEDs exhibit high EQE of 22.6%, a current 69 cd/A, and power 50 lm/W, which are higher than those conventional doped OLED among best OLEDs. The performance devices can be ascribed to effective confinement charges excitons in emission by well structure. is demonstrated cost for...

Readily available phenol-derived biaryls reacted with allenes under palladium catalysis to provide a variety of highly valuable spiro[cyclohexane-1,1′-indene]-2,5-dien-4-ones. This new catalytic process, involving key step regioselective allylative dearomatization phenol, proceeded efficiently through [3 + 2] spiroannulation pathway by overcoming undesired β-hydride elimination. Preliminary asymmetric studies showed that high enantioselectivity could be realized using commercially PHOX...