Benzo[1,2-b:6,5-b’]dithiophene(dithiazole)-4,5-dione derivatives: synthesis, electronic properties, crystal packing and charge transport was written by Getmanenko, Yulia A.;Fonari, Marina;Risko, Chad;Sandhu, Bhupinder;Galan, Elena;Zhu, Lingyun;Tongwa, Paul;Hwang, Do Kyung;Singh, Sanjeev;Wang, He;Tiwari, Shree Prakash;Loo, Yueh-Lin;Bredas, Jean-Luc;Kippelen, Bernard;Timofeeva, Tatiana;Marder, Seth R.. And the article was included in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2013.Application of 116332-61-7 This article mentions the following:
A series of dihalo- and bis-aroyl-substituted benzo[1,2-b:6,5-b’]dithiophene-4,5-diones were synthesized, and their electronic, electrochem., and elec. properties investigated. Synthetic strategies to increase (i) the conjugation length of the base mol. structure – through introduction of thiophene units bearing electronically neutral substituents (hydrogen or alkyl groups) or strong electron-withdrawing pentafluorobenzoyl group(s) – and (ii) the electron affinity – by moving to a benzo[1,2-d:4,3-d’]bis(thiazole)-4,5-dione structure – were developed. Mol. packing in the single crystal was studied by single-crystal x-ray structural anal., and this information was subsequently used in the determination of the electronic band structures, densities of states (DOS), effective transfer integrals, and effective charge-carrier masses via d. functional theory (DFT) methods. The charge-carrier transport properties of the benzo[1,2-b:6,5-b’]dithiophene-4,5-dione and benzo[1,2-d:4,3-d’]bis(thiazole)-4,5-dione derivatives were investigated through the fabrication and characterization of organic field-effect transistors (OFETs) via both solution-processed and vacuum-deposited films. 2,7-Bis-pentafluorobenzoyl-benzo[1,2-b:6,5-b’]dithiophene-4,5-dione (I) exhibited field-effect behavior with an average electron mobility μe = 4.4 (±1.7) × 10-4 cm2 V-1 s-1 when the active layer was vacuum-deposited, and a larger μe= 6.9 × 10-3 cm2 V-1 s-1 when the active layer was solution-processed. These results are in stark contrast with the DFT-determined electronic band structure and effective mass, which indicate that the material possesses good intrinsic charge-carrier transport characteristics. The combined results reveal the importance of thin-film processing and that further processing refinements could lead to improved device performance. Only one material with benzo[1,2-d:4,3-d’]bis(thiazole)-4,5-dione core, 2,7-bis-(4-n-hexyl-thiophene-2-yl)-benzo[1,2-d:4,3-d’]bis(thiazole)-4,5-dione (II), showed average μe = 8.2 × 10-5 cm2 V-1 s-1 in OFET with solution-processed active layer. Unexpectedly, measurable hole transport was observed for 2,7-bis-(5-n-nonyl-thiophen-2-yl)-benzo[1,2-b:6,5-b’]dithiophene-4,5-dione (III) (μh = 8.5 × 10-5 cm2 V-1 s-1) and 2,6-bis-(thiophen-2-yl)-3,5-di-n-hexyl-4H-cyclopenta[1,2-b:5,4-b’]dithiophen-4-one (IV) (μh = 3.7 × 10-4 cm2 V-1 s-1). In the experiment, the researchers used many compounds, for example, N-Methoxy-N-methyl-4-(trifluoromethyl)benzamide (cas: 116332-61-7Application of 116332-61-7).
N-Methoxy-N-methyl-4-(trifluoromethyl)benzamide (cas: 116332-61-7) belongs to amides. Amides can be viewed as a derivative of a carboxylic acid RC(=O)OH with the hydroxyl group –OH replaced by an amine group −NR′R″; or, equivalently, an acyl (alkanoyl) group RC(=O)− joined to an amine group. The presence of the amide group –C(=O)N– is generally easily established, at least in small molecules. It can be distinguished from nitro and cyano groups in IR spectra. Amides exhibit a moderately intense νCO band near 1650 cm−1. By 1H NMR spectroscopy, CONHR signals occur at low fields. In X-ray crystallography, the C(=O)N center together with the three immediately adjacent atoms characteristically define a plane.Application of 116332-61-7
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics