High performance volatile polymeric memory devices based on novel triphenylamine-based polyimides containing mono- or dual-mediated phenoxy linkages was written by Kuorosawa, Tadanori;Chueh, Chu-Chen;Liu, Cheng-Liang;Higashihara, Tomoya;Ueda, Mitsuru;Chen, Wen-Chang. And the article was included in Macromolecules (Washington, DC, United States) in 2010.Recommanded Product: 1-Iodo-4-(4-nitrophenoxy)benzene The following contents are mentioned in the article:
Two novel functional polyimides (PIs), PI(AAPT-TPA) and PI(APT-TPA), consisting of electron-donating 4-amino-4′-(p-aminophenoxy)-triphenylamine (AAPT) or 4,4′-bis(p-aminophenoxy)-triphenylamine (APT) and electron-accepting phthalimide moieties, were prepared for the memory device applications. The TPA moieties as electron donor are expected to enhance the electron donating and charge transport ability with phthalimide moieties (electron acceptor). The monophenoxy linkage PI(AAPT-TPA) had a higher Tg and a lower band gap than the dual-phenoxy linkage PI(APT-TPA). It suggested the more rigid backbone of the former and led to different memory characteristics. The memory devices with the configuration of ITO/PI/Al exhibited two conductivity states and could be swept pos. or neg. with a high ON/OFF current ratio of 108-109. The PI(AAPT-6FDA) device relaxed from the ON state to the OFF state quickly after the applied voltages was removed, whereas the ON state of the PI(APT-6FDA) device could remain for around 4 min after the power was turned off. Probably dynamic random access memory (DRAM) was exhibited for the PI(AAPT-6FDA) device and static random access memory (SRAM) was for the PI(APT-6FDA) device. The volatile memory characteristics were probably attributed to the unstable charge transfer (CT) complex based on the weak theor. dipole moments of the studied PIs. The dual-mediated phenoxy linkage of PI(APT-6FDA) led to the more twisted conformation compared to the monosubstituted PI(AAPT-6FDA) based on the theor. anal. by the d. functional theory (DFT) method. It thus produced a potential barrier for delaying the back CT process by the elec. field and explained the SRAM characteristic. The present study suggested the importance of the TPA structure for the memory characteristics. The fast switching and high ON/OFF characteristics also indicated the new TPA based polyimides for advanced memory technol. This study involved multiple reactions and reactants, such as 1-Iodo-4-(4-nitrophenoxy)benzene (cas: 21969-05-1Recommanded Product: 1-Iodo-4-(4-nitrophenoxy)benzene).
1-Iodo-4-(4-nitrophenoxy)benzene (cas: 21969-05-1) belongs to iodide derivatives. Indole produced by Proteus, Pseudomonas, Escherichia and other species was shown to be a growth promoting factor in Arabidopsis thaliana.Indole was synthesized in moderate yield via an o-naphthoquinone catalyzed tandem cross-coupling of substituted aniline and benzylamine under aerobic oxidation conditions.Recommanded Product: 1-Iodo-4-(4-nitrophenoxy)benzene
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com