Application of Benzo[b]naphtho[2,3-d]furan, 3-bromo-

Physicochemical property

Benzo[b]naphtho[2,3-d]furan, 3-bromo- is used in laboratory research and development processes and in chemical and pharmaceutical production. Its boiling point is predicted to be 442.9±18.0 °C and its density is predicted to be 1.557±0.06 g/cm3. 

Fig. 1 Predicted NMR data calculated using Advanced Chemistry Development, Inc.

Application

Synthesis of Benzidine derivative

Organic photoelectric materials are organic materials with the characteristics of photon and electron generation, conversion and transmission. At present, Organic optoelectronic materials have been applied to ALED organic light-emitting diodes (OLED), which refers to devices that emit Light under the action of current or electric field. The invention of benzidine derivate the aromatic amine on the nitrogen atom contains a lone pair electrons, showing good electricity is sex, and benzidine derivate conjugate system of the present invention is larger, therefore has the high hole rate, show good hole transmission performance. In addition, benzidine derivatives of the invention also introduce substituted groups with large volume, effectively improve the glass transition temperature and thermal stability of the material, and is conducive to the film formation of the material. The organic electroluminescent device of the invention comprises an anode, a cathode and one or more organic layers. The organic layer is located between the anode and the cathode, and at least one layer of the organic layer contains benzidine derivatives of the invention. The organic electroluminescent device of the present invention has lower driving voltage, higher luminous efficiency and luminescent brightness, and has long service life. When the invention synthesizes benzidine derivatives, Benzo[b]naphtho[2,3-d]furan, 3-bromo- is an intermediate [1].

Preparation of the triarylamine derivatives

The invention discloses a triaromatic amine derivative and its organic electroluminescent device, which relates to the technical field of organic photoelectric materials. The invention of three aromatic amine derivatives conjugated system is bigger, therefore has higher hole shift rate, show the good hole transmission performance, three aromatic amine derivatives of the present invention also has good thermal stability and solubility, is advantageous to the film-forming material. The organic electroluminescent device of the invention comprises a cathode, an anode and one or more organic layers. The organic layer is located between the cathode and the anode, and at least one layer of the organic layer contains the triaromatic amine derivative of the invention. The organic electroluminescent device of the invention has lower driving voltage, higher luminous efficiency and luminescent brightness, and has a long service life. When the invention synthesizes triarylamine derivatives, Benzo[b]naphtho[2,3-d]furan, 3-bromo- is an intermediate [2].

Preparation of fluorene-containing triarylamine derivatives

As an important part of the transfer of holes, hole transfer material plays an important role in organic light-emitting devices. Its function is to improve the injection and transmission efficiency of holes, reduce the injection barrier of holes, and effectively block electrons in the light-emitting layer, so as to improve the brightness, efficiency and life of OLED devices. Therefore, hole transmission materials need to be constantly improved to improve their own performance, and thus improve the performance of OLED devices. Excellent performance of hole transport materials should have high hole mobility, good film formation and thermal stability, as well as suitable HOMO levels and other characteristics. The structure of triaromatic amine derivative containing fluorene in the invention is shown in Formula 1, wherein two phenyl fluorene are connected with aromatic amine N atom through bridging groups L1 and L2 respectively, and at least one of L1 and L2 is not single bond and contains deuterium atom. When the invention synthesizes fluorene-containing triarylamine derivatives, Benzo[b]naphtho[2,3-d]furan, 3-bromo- is an intermediate. The triaromatic amine derivative containing fluorene of Formula 1 of the invention has good photoelectric performance, especially compared with the undeuterated triaromatic amine derivative containing fluorene, the triaromatic amine derivative containing fluorene of the invention has higher hole transmission ability, which improves the compound efficiency of hole and electron forming exciton in the luminescent layer, and the material has good stability. Therefore, When it is used as hole transfer material in organic luminescent devices, organic luminescent devices show higher luminous efficiency and longer service life, and the performance of the devices is obviously improved [3].

References

[1] Zhou W and Cai H. Benzidine derivative with good hole transport performance and organic light-emitting device with low driving voltage[P]. Faming Zhuanli Shenqing, 108822020, 2018.

[2] Du M and Sun J. Preparation of the triarylamine derivative and its organic light-emitting device[P]. Faming Zhuanli Shenqing, 108341795, 2018.

[3] Sun J, Guo J, Zhou W. Preparation of fluorene-containing triarylamine derivative and its organic electroluminescent device[P]. Faming Zhuanli Shenqing 2022, 114989021.

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