7496-02-8Relevant academic research and scientific papers
Microwave-induced surface-mediated highly efficient regioselective nitration of aromatic compounds: Effects of penetration depth
BANIK, BIMAL K.,DAS, APARNA,YADAV, RAM NARESH
, p. 2203 - 2206 (2021/08/24)
Surface mediated highly regioselective nitration of aromatic compounds under diverse microwave-induced conditions was investigated in this work. The effects of the penetration depth of the surfaces were found to be more crucial than other dielectric parameters. Despite significant progress of microwave-induced reactions, no reports have examined the penetration depth of the surfaces used in these processes.
Chrysene-Based Azahelicene π-Linker of D-π-D-Type Hole-Transporting Materials for Perovskite Solar Cells
Tang, Zefeng,Li, Tianyu,Cao, Yucai,Zhang, Yuyan,He, Lifei,Zheng, Aibin,Lei, Ming
, p. 4923 - 4928 (2021/10/19)
Chrysene is a readily available material for exploring new polycyclic aromatic hydrocarbons (PAHs). In this study, two chrysene based azahelicenes, nine-membered BA7 and ten-membered DA6, are constructed by intermolecular oxidative annulation of 6-aminochrysene and intramolecular annulation of N6,N12-bis(1-chloronaphthalen-2-yl)chrysene-6,12-diamine, respectively. The hexylated BA7 and DA6 and their brominated products were undoubtedly characterized by single crystal XRD. Subsequent amination with bis(9-methyl-9H-carbazol-3-yl)amine (BMCA) electron donor afforded D-π-D-type semiconductors BA7-BMCA and DA6-BMCA with beneficial properties to act as hole transport materials for perovskite solar cell. Compared with 19.4 % champion power conversion efficiency (PCE) of BA7-BMCA based device, a higher PCE of 20.2 % for DA6-BMCA counterpart may be attributed to its S-shaped double helicene-like linker with extended π-conjugated system.
Surface-mediated highly efficient regioselective nitration of aromatic compounds by bismuth nitrate
Samajdar,Becker,Banik
, p. 8017 - 8020 (2007/10/03)
Montmorillonite impregnated with bismuth nitrate was found to be an excellent reagent for aromatic nitration in high yield. (C) 2000 Elsevier Science Ltd.
Nitration of polycyclic aromatic hydrocarbons using a supported catalyst
Smith, Amy C.,Narvaez, Lorena D.,Akins, Bridget G.,Langford, Moses M.,Gary, Thomas,Geisler, Victoria J.,Khan, Farooq A.
, p. 4187 - 4192 (2007/10/03)
We report the use of a catalyst, sulfuric acid supported on silica-gel, as a promising method for facile, high yielding, regioselective syntheses of mononitrated polycyclic aromatic hydrocarbons, 6-nitrochrysene, 1- nitropyrene, 1-nitronaphthalene, 2-nitrofluorene, 3-nitrofluoranthene, and 9- nitroanthracene.
Nitration of Polycyclic Aromatic Hydrocarbons by Dinitrogen Tetraoxide. II. Synthetic and Mechanistic Aspects
Eberson, Lennart,Radner, Finn
, p. 343 - 356 (2007/10/02)
Treatment of polycyclic aromatic hydrocarbons by dinitrogen tetraoxide in dichloromethane solution leads to the clean production of mononitro derivatives with high positional selectivity in almost quantitative yields.For substrates less reactive than chrysene the addition of catalytic amounts of acid is required for the reaction to proceed at convenient rates.Being very easily performed, the method should be regarded as the best yet found for the synthesis of small amount of these, in many cases, mutagenic mononitro compounds.From studies on relative reactivities, isomer distributions, and the effect of acid, base and nitrosonium ion on the reaction, a mechanism involving initial attack of a novel electrophile, nitrosated dinitrogen tetraoxide, is proposed.The initially formed ?-complex is suggested to be transformed into the nitro ?-complex via a pathway involving radical pairs, thus explaining the observation by others of CIDNP effects on the reaction path of nitrous acid catalyzed nitration, a reaction proposed to follow the same reaction scheme.
Separation and Characterization of Mononitro Derivatives of Phenanthrene, Pyrene, Chrysene, Fluoranthene and Triphenylene
Svendsen, Helge,Roenningsen, Hans-Petter,Sydnes, Leiv K.,Greibrokk, Tyge
, p. 833 - 844 (2007/10/02)
Mononitro derivatives of selected polycyclic aromatic hydrocarbons with 3 and 4 condensed rings have been synthesized to obtain samples for measurements of mutagenic properties.Crude purification of the compounds was carried out on gravity columns prior to final purification by HPLC to a purity of approximately 99.9percent.Structural isomers were identified from NMR, MS and UV spectra.

