1073-61-6Relevant academic research and scientific papers
Correlation of Alkyl and Polar Groups in the Gas-Phase Pyrolysis Kinetics of β-Substituted Ethyl Chloride
Chuchani, Gabriel,Martin, Ignacio,Rotinov, Alexandra,Hernandez A., Jose A.,Reikonnen, Nadejda
, p. 1563 - 1566 (1984)
The gas-phase pyrolysis kinetics of several β-alkyl-substituted ethyl chlorides were studied in a static system over the temperature range of 400.1-470.1 deg C and a pressure range of 32-317 torr.The reactions in seasoned vessels, with the radical chain i
H-aggregation strategy in the design of molecular semiconductors for highly reliable organic thin film transistors
Kim, Seul-Ong,An, Tae Kyu,Chen, Jun,Kang, Il,Kang, So Hee,Chung, Dae Sung,Park, Chan Eon,Kim, Yun-Hi,Kwon, Soon-Ki
experimental part, p. 1616 - 1623 (2012/03/12)
Four new quaterthiophene derivatives with end-groups composed of dicyclohexyl ethyl (DCE4T), dicyclohexyl butyl (DCB4T), cyclohexyl ethyl (CE4T), and cyclohexyl butyl (CB4T) were designed. All materials showed high solubility in common organic solvents. UV-vis absorption measurements showed that the quaterthiophene derivatives with asymmetrically substituted cyclohexyl end-groups (CE4T and CB4T) preferred H-type aggregation whereas those with symmetrically substituted cyclohexyl end-groups (DCE4T and DCB4T) preferred J-type aggregation. The molecular structure-dependent packing (H or J) of the new quaterthiophene derivatives was analyzed by grazing-incidence wide-angle X-ray scattering (GIWAXS) measurements. The field-effect mobilities of devices that incorporated the asymmetrical molecules, CE4T and CB4T, were quite high, above 10 - 2 cm 2 V - 1 s - 1 , due to H-aggregation, whereas the field-effect mobilities of devices that incorporated symmetrical molecules, DCE4T and DCB4T, were poor, below 10 - 4 cm 2 V - 1 s - 1 , due to J-aggregation. More importantly, H-aggregation within the thin film provided stable crystalline morphologies in the spin-coated films, and, thus, thin film transistors (TFTs) using cyclohexylated quaterthiophenes yielded highly reproducible transistor performances. The distributions of measured field-effect mobilities in transistors based on cyclohexylated quaterthiophenes with H-aggregation were remarkably narrow.
