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Upstream product

• 86-74-8 9H-carbazole 
• 644-97-3 Dichlorophenylphosphine 

Downstream Products

• 805232-35-3 [Rh(acac)(CO)(di-N-carbazolylphenylphosphine)] 

Relevant academic research and scientific papers

Carbazolylphosphines and carbazolylphosphine oxides: Facilely synthesized host materials with tunable mobilities and high triplet energy levels for blue phosphorescent OLEDs

A high triplet energy level (ET) and balanced carrier mobility are critical factors for host materials in efficient blue phosphorescent organic light-emitting diodes (PHOLEDs). Herein, we report a facile synthesis of four compounds, dicarbazolylphenylphosphine (DCPP), dicarbazolylphenylphosphine oxide (DCPPO), tricarbazolylphosphine (TCP), and tricarbazolylphosphine oxide (TCPO), and their application as host materials in a classic blue phosphorescent emitter bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(iii) (FIrpic). The four compounds show a high ET of up to 3.0 eV and tunable mobilities. We fabricated four OLEDs with a device structure of ITO/MoO3 (1 nm)/N,N′-dicarbazolyl-3,5-benzene (mCP):MoO3 (20 wt%, 10 nm)/mCP (30 nm)/Host:FIrpic (7 wt%, 20 nm)/1,3,5-tri(m-pyrid-3-yl-phenyl) benzene (TmPyPB, 40 nm)/LiF (1 nm)/Al (100 nm), all of which display maximum external quantum efficiencies (EQEs) exceeding 20%. The DCPPO-based device reaches the highest EQE of 27.5%, the maximum luminance of 14 070 cd m-2, and the lowest efficiency roll-off of 22.2% from 1 to 10 mA cm-2, which is among the best-performing FIrpic-based PHOLEDs without using any light extraction method.

Selenide-containing organic resonance molecules as turn-on fluorescent probes for the selective detection of hypochlorous acid

A new series of N-PSe resonance-based fluorescent molecules were developed and used for the detection of hypochlorous acid (HClO) with rapid response and high selectivity. These Se-containing molecules can selectively detect trace amounts of HClO in nM, showing significantly strengthened fluorescence due to the enhanced resonance variation with an increased distance between the fluorophore and Se. The design of N-PSe resonance molecules in donor-resonance-acceptor (D-r-A) architectures could be an important way to develop high-performance turn-on fluorescent probes for HClO detection.

Selenium atom-containing fluorescence probe, and preparation method and application thereof

The invention discloses a selenium atom-containing fluorescence probe, and a preparation method and an application thereof, and belongs to the field of functional materials. The structural general formula of above material is represented by formula (I) shown in the description; and in the formula (I), Ar is a carbazolyl or diphenylamino group, and Ph is a phenyl group. The preparation method of the material concretely comprises the following steps: reacting carbazole/diphenylamine with dichlorophenylphosphine/diphenylchlorophosphine to form a derivative containing an N-P structure, and carrying out chemical modification to introduce selenium atoms in order to form the selenium atom-containing fluorescence probe. The method has the advantages of simple synthesis steps, mild conditions, low production cost and high thermal stability. Se=O double bonds are formed through the reaction of the selenium atoms and hypochlorite radicals in order to generate fluorescence change. The selenium atom-containing fluorescence probe has the advantages of high sensitivity and high selectivity.

Dynamically adaptive characteristics of resonance variation for selectively enhancing electrical performance of organic semiconductors

Increased resonance: The selective tuning of the optoelectronic properties of organic semiconductors is possible by enantiotropic resonance variation. Using resonance forms of N+i￡P-O- in a series of arylamine-phosphine oxide hybrids afforded low-voltage-driven phosphorescent OLEDs with outstanding performances. Copyright

Sterically hindered electron-withdrawing ligands: The reactions of N-carbazolyl phosphines with rhodium and palladium centres

The series of N-carbazolyl phosphines PPh3-n(NC 12H8)n (n = 1, L1; n = 2, L 2; n = 3, L3) has been synthesised using BuLi to generate the N-carbazolyl lithium salt, followed by reaction with the appropriate chlorophosphine. The reactions between [Rh(μ-Cl)(CO)2]2 and four equivalents of L1 or L2 gave [RhCl(CO)(L 1)2] 1 and [RhCl(CO)(L2)2] 2, though attempts to synthesise the analogous complex using L3 resulted in the formation of [Rh(μ-Cl)(CO)(L3)]2 3 instead. The inability of L3 to cleave the chloride bridges can be related to its considerable steric requirements. The electronic properties of L1-3 were assessed by comparison of the (CO) values of the [Rh(acac)(CO)(L 1-3)] complexes 4-6. The increase in number of N-carbazolyl substituents at the phosphorus atom results in a decrease of the σ-donor and increase in the π-acceptor character in the order L1 2 3. In the reactions of L1-3 with [PdCl2(cod)] only L1 was able to displace cod from the metal centre and form [PdCl2(L1)2] 7. The use of [PdCl2(NCMe)2] instead of [PdCl2(cod)] resulted in the formation of the complexes [PdCl2(L1) 2] 7 from L1, the cyclometallated complex [Pd(μ-Cl){P(NC12H8)2(NC12H 7)-κ2P,C}]2 8 from L3, and a mixture of [PdCl2(L2)2] 9 and [Pd(μ-Cl){PPh(NC 12H8)(NC12H7)-κ2P, C}]2 10 from L2. The reaction of L3 with [Pd(OAc)2] produced the cyclometallated complex [Pd(μ-O 2CCH3){P(NC12H8)2(NC 12H7)-2P,C}]211. The reaction of L3 with [Pd2(dba)3]·CHCl3 produced the 14-electron complex [Pd(L3)2] 12. The X-ray crystal structures of six complexes are reported, all of which show the presence of C-H...Pd hydrogen bonding.