Spiroaromatic hydrocarbons are an important class of organic semiconductor building units. Their unique non-planar spiro conjugation effect, cross conformation and steric hindrance effect can effectively improve the optoelectronic properties and device stability of organic semiconductor materials. The one-pot preparation method of spirobifluorene xanthene (SFX) [1,2] has the advantages of three bonds at a time, high efficiency and speed (as shown in Figure 1). It has overcome the problems of lengthy synthesis route of spirobifluorene and expensive raw materials. It has become a new generation of steric building blocks and has been widely used in cutting-edge fields such as organic light-emitting[3], organic lasers, field-effect transistors, and perovskite solar cells. It has become a model of green organic semiconductors[4].

Figure 1 Synthesis route of spirofluorenoxanthene (SFX)[1,2]

      Spirofluorenoxanthene (SFX) is used in deep blue electroluminescent devices. The current efficiency, power efficiency and quantum efficiency can reach 3.2 cd/A, 2.0 lm/W, 4.1%, and the color difference coordinates (0.15, 0.08) meet the requirements The pure blue light parameter requirements of the American Illuminating Institute improve its quantum efficiency and color purity compared with traditional spirodifluorofluorene-based blue fluorescent OLEDs [4][4]

      In printing and flexible electronic applications, two-dimensional semiconductor nanocrystals assembled from the new spiro compound Py-SFDBAO (9001838) may be the key component of environmentally friendly water-based dispersion organic nano-inks (Figure 3). This research result Published in the Adv. Mater. journal in 2013 [5].

Figure 3 Py-SFDBAO (9001838) was successfully used to assemble two-dimensional semiconductor nanocrystals
Left: 2D-GIXD of Py-SFDBAO nanosheet film, right: molecular packing arrangement of Py-SFDBAO on Si substrate

      Bailingwei sells the new generation of spiroaromatic organic semiconductor building blocks developed by Professor Xie Linghai of Nanjing University of Posts and Telecommunications - spirofluorenoxanthene (SFX), contributing to the field of organic semiconductors. This series of products has the following advantages:

      Improve the quantum efficiency of light-emitting devices (Figure 2);
Enhance the thermal stability and photoelectric stability of materials;
The molecules are highly modifiable and have a wide range of uses: they can be used in the research and production of electroluminescent devices, conductive polymer materials, plasticizers for conductive plastics, flame retardants, antibacterial and antioxidants for plastic products;
Green, economical and environmentally friendly, it has certain industrialization prospects.

      Product list

      References

Ling-Hai Xie, Feng Liu, Chao Tang, Xiao-Ya Hou, Yu-Ran Hua, Qu-Li Fan, Wei Huang. Org. Lett. 2006, 8, 2787-2790.
Jie Zhao, Guo-Hua Xie, Cheng-Rong Yin, Ling-Hai Xie, Chun-Miao Han, Run-Feng Chen, Hui Xu, Ming-Dong Yi, Zhao-Peng Deng, Shu-Fen Chen, Yi Zhao, Shi-Yong Liu, Wei Huang. Chem. Mate. 2011, 23, 5331-5339.
Jing Li, Dongxue Ding, Youtian Tao, Ying Wei, Runfeng Chen, Linghai Xie, Wei Huang, Hui Xu. Adv. Mater. 2016, 28, 3122.
Mingli Sun, Ruochen Xu, Linghai Xie, Ying Wei, Wei Huang. Chin. J. Chem. 2015, 33, 815-827.
Zong-Qiong Lin, Jin Liang, Peng-Ju Sun, Feng Liu, Yee-Yan Tay, Ming-Dong Yi, Kun Peng, Xian-Hai Xia, Ling-Hai Xie, Xin-Hui Zhou, Jian-Feng Zhao, and Wei Huang. Adv. Mater. 2013, 25, 3664.