88-87-9Relevant articles and documents
Semiquinone-bridged bisdithiazolyl radicals as neutral radical conductors
Yu, Xin,Mailman, Aaron,Lekin, Kristina,Assoud, Abdeljalil,Robertson, Craig M.,Noll, Bruce C.,Campana, Charles F.,Howard, Judith A. K.,Dube, Paul A.,Oakley, Richard T.
, p. 2264 - 2275 (2012)
Semiquinone-bridged bisdithiazolyls 3 represent a new class of resonance-stabilized neutral radical for use in the design of single-component conductive materials. As such, they display electrochemical cell potentials lower than those of related pyridine-bridged bisdithiazolyls, a finding which heralds a reduced on-site Coulomb repulsion U. Crystallographic characterization of the chloro-substituted derivative 3a and its acetonitrile solvate 3a·MeCN, both of which crystallize in the polar orthorhombic space group Pna21, revealed the importance of intermolecular oxygen-to-sulfur (CO...SN) interactions in generating rigid, tightly packed radical π-stacks, including the structural motif found for 3a·MeCN in which radicals in neighboring π-stacks are locked into slipped-ribbon-like arrays. This architecture gives rise to strong intra- and interstack overlap and hence a large electronic bandwidth W. Variable-temperature conductivity measurements on 3a and 3a·MeCN indicated high values of θ(300 K) (>10 -3 S cm-1) with correspondingly low thermal activation energies Eact, reaching 0.11 eV in the case of 3a·MeCN. Overall, the strong performance of these materials as f = 1/ 2 conductors is attributed to a combination of low U and large W. Variable-temperature magnetic susceptibility measurements were performed on both 3a and 3a·MeCN. The unsolvated material 3a orders as a spin-canted antiferromagnet at 8 K, with a canting angle φ = 0.14° and a coercive field Hc = 80 Oe at 2 K.
Nitrogen Oxides and Nitric Acid Enable the Sustainable Hydroxylation and Nitrohydroxylation of Benzenes under Visible Light Irradiation
Hofmann, Laura Elena,Mach, Leonard,Heinrich, Markus R.
supporting information, p. 431 - 436 (2017/12/15)
A new type of waste recycling strategy is described in which nitrogen oxides or nitric acid are directly employed in photocatalyzed hydroxylations and nitrohydroxylations of benzenes. Through these transformations, otherwise costly denitrification can be combined with the synthesis of valuable compounds for various applications.
Nitration of phenolic compounds by antimony nitrate
Jirandehi, Hassan Fathinejad,Mirzaeian, Marjan
experimental part, p. 284 - 286 (2011/07/08)
Antimony nitrate is new compound to be an efficient nitration reagent in the nitration of phenolic compounds with high yields. This producerworks efficiently onmost of the examples, as a grinding nitration reaction, proceed very fast (~1 min) and thermogenic. Copyright Taylor & Francis Group, LLC.