90766-77-1Relevant academic research and scientific papers
Diazapentacenes from Quinacridones
Wiesner, Thomas,Ahrens, Lukas,Rominger, Frank,Freudenberg, Jan,Bunz, Uwe H. F.
, p. 4553 - 4556 (2021/02/26)
Bis(silylethynylated) 5,7- and 5,12-diazapentacenes were synthesized from cis- and trans-quinacridone using protection, alkynylation and deoxygenation. The solid-state packing of the targets is determined by choice and position of the silylethynyl substit
Singlet Biradical Versus Triplet Biradical/Zwitterion Characteristics in Isomers of C6?C5?C6?C7?C6-Fused Pentacyclic Aromatic Hydrocarbons Revealed through Reactivity Patterns
Zhen, Cian-Jhe,Lu, Shu-Feng,Lin, Min-Hwa,Wu, Jay-Tai,Chao, Ito,Lin, Chih-Hsiu
, p. 16682 - 16689 (2021/11/01)
Among various polycyclic aromatic hydrocarbons, C6?C5?C6?C7?C6 fused pentacyclic aromatic hydrocarbons have the unique potential to adopt quinonoid, zwitterion, singlet, or triplet biradical electroni
Luminescent Anion Sensing by Transition-Metal Dipyridylbenzene Complexes Incorporated into Acyclic, Macrocyclic and Interlocked Hosts
Beer, Paul D.,Dapin, Sophie,Knighton, Richard C.
, p. 5288 - 5296 (2020/04/24)
A series of novel acyclic, macrocyclic and mechanically interlocked luminescent anion sensors have been prepared by incorporation of the isophthalamide motif into dipyridylbenzene to obtain cyclometallated complexes of platinum(II) and ruthenium(II). Both
Synthesis and properties of novel N,C,N terdentate skeleton based on 1,3-di(pyridin-2-yl)benzene moiety—new tricks for old dogs
Tan, Shuai,Wu, Xiugang,Zheng, Yanqiong,Wang, Yafei
, p. 1951 - 1954 (2019/09/12)
Utilization of intermolecular Friedel–Crafts and intramolecular condensation reaction, novel 1,3-di(pyridine-2-yl)benzene(N,C,N terdentate) skeleton with electro-withdrawing group in 6' position of pyridyl and a cyclization between 6' position of pyridyl and 6 position of benzyl ring were firstly designed and synthesized. The structures of these novel N,C,N terdentate were confirmed by NMR, MS and X-ray single crystalanalyses. The photophysical properties of these compounds were briefly explored.
Highly active catalysts for the transfer dehydrogenation of alkanes: Synthesis and application of novel 7-6-7 ring-based pincer iridium complexes
Shi, Yuan,Suguri, Takuya,Dohi, Chisato,Yamada, Hirotsuna,Kojima, Satoshi,Yamamoto, Yohsuke
, p. 10672 - 10689 (2013/08/23)
A series of Ir-PCP pincer precatalysts [(7-6-7-RPCP)Ir(H)(Cl)] and [(7-6-7-ArPCP)Ir(H)(Cl)(MeCN)] bearing a novel "7-6-7" fused-ring skeleton have been synthesized based upon the postulate that the catalytic species would have durability due to their rather rigid structure and high activity owing to the low but sufficient flexibility of their backbones, which are not completely fixed. Treatment of these precatalysts with NaOtBu gave rise to the active 14 electron (14e) species [(7-6-7-iPrPCP)Ir] and [(7-6-7-PhPCP)Ir], which can trap hydrogen and were spectroscopically characterized as the tetrahydride complexes. Both [(7-6-7-iPrPCP)Ir] and [(7-6-7-PhPCP)Ir] were found to be highly effective in the transfer dehydrogenation of cyclooctane with tert-butylethylene as the hydrogen acceptor, the initial reaction rate at high temperature (230°C) being higher for [(7-6-7-iPrPCP)Ir] than [(7-6-7-PhPCP)Ir], and the turnover number (TON) of the overall hydrogen transfer being higher for the latter. Nonetheless, the estimated TONs were as high as 4600 and 4820 for the two complexes at this temperature, respectively, which are unprecedented absolute values. In terms of durability, the [(7-6-7-PhPCP)Ir] complex is the catalyst of choice for this reaction. Structural analysis and computational studies support the importance of the low flexibility of the ligand core. Copyright
Ladder oligo(m -aniline)s: Derivatives of azaacenes with cross-conjugated π-systems
Rajca, Andrzej,Boratynski, Przemyslaw J.,Olankitwanit, Arnon,Shiraishi, Kouichi,Pink, Maren,Rajca, Suchada
, p. 2107 - 2120 (2012/05/20)
We describe the synthesis and electronic properties of ladder oligomers of poly(m-aniline) that may be considered as derivatives of azaacenes with cross-conjugated π-systems. Syntheses of ladder oligo(m-aniline)s with 9 and 13 collinearly fused six-member
Conformationally constrained, stable, triplet ground state (S = 1) nitroxide diradicals. Antiferromagnetic chains of S = 1 diradicals
Rajca, Andrzej,Takahashi, Masahiro,Pink, Maren,Spagnol, Gaelle,Rajca, Suchada
, p. 10159 - 10170 (2008/03/11)
Nitroxide diradicals, in which nitroxides are annelated to m-phenylene forming tricyclic benzo-bisoxazine-like structures, have been synthesized and characterized by X-ray crystallography, magnetic resonance (EPR and 1H NMR) spectroscopy, as we
