1403834-41-2

Upstream product

• 13154-24-0 triisopropylsilyl chloride 
• 267-65-2 benzo[1,2-b:4,5-b']dithiophene 

Relevant academic research and scientific papers

Benzo[1,2-b:4,5-b']dithiophene as a weak donor component for push-pull materials displaying thermally activated delayed fluorescence or room temperature phosphorescence

In the search for high-performance donor-acceptor type organic compounds displaying thermally activated delayed fluorescence (TADF), triisopropylsilyl-protected benzo[1,2-b:4,5-b']dithiophene (BDT-TIPS) is presented as a novel donor component in combination with two known acceptors: dimethyl-9H-thioxanthenedioxide (TXO2) and dibenzo[a,c]phenazinedicarbonitrile (CNQxP). For a broader comparison, the same acceptors are also combined with the well-studied 9,9-dimethyl-9,10-dihydroacridine (DMAC) donor. Optimized BDT-TIPS-containing structures show calculated dihedral angles of around 50° and well-separated highest occupied and lowest unoccupied molecular orbitals, although varying singlet-triplet energy gaps are observed experimentally. By changing the acceptor moiety and the resulting ordering of excited states, room temperature phosphorescence (RTP) attributed to localized BDT-TIPS emission is observed for TXO2-BDT-TIPS, whereas CNQxP-BDT-TIPS affords a combination of TADF and triplet-triplet annihilation (TTA) delayed emission. In contrast, strong and pure TADF is well-known for TXO2-DMAC, whereas CNQxP-DMAC shows a mixture of TADF and TTA at very long timescales. Overall, BDT-TIPS represents an alternative low-strength donor component for push-pull type TADF emitters that is also able to induce RTP properties.

Benzo-biheterocycle compound, display panel and display device

The invention provides a benzo-biheterocycle compound with a structure shown as formula (I), wherein Y1 and Y2 respectively are oxygen or sulfur atoms; Ar1 and Ar2 respectively are single-bond, substituted or unsubstituted phenyl group, substituted or unsubstituted naphthyl, substituted or unsubstituted anthryl, substituted or unsubstituted phenanthryl, substituted or unsubstituted acenaphthyleneand substituted or unsubstituted heteroaromatic ring; m and n respectively are 0 or 1; D1 and D2 respectively are aryl and heteroaryl; Ar3 and Ar4 respectively are aryl and heteroaryl; R1 is hydrogenatom, phenyl and naphthyl. According to the invention, benzene ring of benzo-biheterocycle is modified; the introduction of thiophene or furan unit is capable of effectively promoting refractive index; thiophene or furan unit is not located on a main conjugated chain and is impossible to effectively expand conjugation or cause red shift of compound absorption spectrum, so that the absorption of the compound in visible region is lower; when the benzo-biheterocycle compound provided by the invention is used as a material of a cathode cap layer, light emitting of OLED (Organic Light Emitting Diode) is not interfered and the OLED can maintain higher color purity.

Borylation on benzo[1,2- b:4,5- b ′]- and naphtho[1,2- b:5,6- b ′]dichalcogenophenes: Different chalcogene atom effects on borylation reaction depending on fused ring structure

The direct borylation reactions of two types of α-silyl-protected acenedichalcogenophenes, i.e., benzo[1,2-b:4,5-b′]- and naphtho[1,2-b:5,6-b′]dichalcogenophenes, were examined, and it was observed that the reaction efficiency largely depends on the fused