On March 26, 2015, Tokito, Shizuo; Kumaki, Daisuke; Mamada, Masashi; Fukuda, Kenjiro; Tanaka, Yasuhiro; Shima, Hidetaka; Yoneda, Yasuhiro; Fujita, Harunori; Kakita, Kazuaki; Omata, Youji; Yamada, Natsuko; Honma, Takashi; Machida, Toshikazu published a patent.Quality Control of 5-Bromo-2-iodobenzotrifluoride The title of the patent was Preparation of benzobis(thiadiazole) derivatives, ink containing them, and organic electronic device using them. And the patent contained the following:
The present invention pertains to a benzobis(thiadiazole) derivative represented by general formula [I; R1 = straight-chain or branched alkyl group or any of group A; group A = , NO2, F, Br, CF3, SCF3, C(R)F2, cyano, CO2R, Cl, iodo, OCF3, SF6, OC(R)F2, or OC(O)R, SC(R)F2; R2 = H; R3 = H, straight-chain or branched alkyl group, or any of group A; at least one R1 and R3 = one of the group A; the two R1s, two R2s, and two R3s may be identical to or different from one another; R = straight-chain or branched alkyl group]. These compounds are thermally stable, soluble in organic solvents, capable of fabricating thin films by coating method, stable in the air, and are excellent in hole and/or electron field effect mobility (渭FE) and are useful for organic electronic devices such as organic thin film transistor, organic electroluminescent device, display devices, displays, and solar cells. The use of these compounds in the semiconductor layer of organic thin film transistor (TFT), high field effect mobility characteristic is realized. When they are used in the hole or electron transport layer of organic electroluminescent device, high luminescent efficiency is realized. When using in the charge-separation layer, hole transport layer, or electron transport layer of solar cells, high incident photon to current conversion efficiency (IPCE) is realized. Thus, 4,7-dibromobenzo[1,2-c:4,5-c’]bis[1,2,5]thiadiazole was coupled with 2-(tributylstannyl)-5-[3-(trifluoromethoxy)phenyl]thiophene in the presence of dichlorobis(triphenylphosphine)palladium in anhydrous toluene at 100掳 (inner temperature) for 6 h, followed by filtration of the crude product (2.1 g) and sublimation for purification to give 0.25 g compound (II) as green solid. The solubility of II was 0.1 weight% in toluene at 100掳, 0.1 weight% in mesitylene at 80掳, and 0.3 weight% in mesitylene at 130掳. A semiconductor ink containing 0.2 weight% II in Me salicylate was added dropwise into a barrier rib pattern on a polyvinylphenol-melamine thin film (formed on a glass substrate with an aluminum gate electrode), dried at 80掳 to form an organic semiconductor layer on which gold film was vacuum-deposited as source and drain electrode. The fabricated organic TFT had field effect mobility of 6.3 X 10-1 cm2/Vs. The experimental process involved the reaction of 5-Bromo-2-iodobenzotrifluoride(cas: 364-12-5).Quality Control of 5-Bromo-2-iodobenzotrifluoride
The Article related to organic thin film transistor benzobisthiadiazole semiconductor layer, benzobisthiadiazole preparation solar cell organic electroluminescent device, Heterocyclic Compounds (More Than One Hetero Atom): Other 5-Membered Rings, Two Or More Hetero Atoms and other aspects.Quality Control of 5-Bromo-2-iodobenzotrifluoride
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com