1574657-19-4Relevant academic research and scientific papers
Palladium-Catalyzed Dimerization of Bis(2-biphenylyl)acetylene toward Sterically Hindered Acephenanthrylene
Ackermann, Maximilian,Freudenberg, Jan,J?nsch, Daniel,Rominger, Frank,Bunz, Uwe H. F.,Müllen, Klaus
supporting information, p. 3758 - 3761 (2018/07/22)
The reaction of 2,2′′-(1,2-ethynediyl)bis-1,1′-biphenyl under homogeneous (heterogeneous) catalysis with Pd/C/TMS-Cl results in a dimerization and the additional formation of five- and six-membered rings. The steric demand of the acetylene prevents a [2 + 2 + 2] cycloaddition, but paves the way toward an alternative reaction. By the formation of an unexpected planar acephenanthrylene, the system avoids steric stain. The synthetic scope and requirements are explored, and a reaction mechanism is proposed.
Steric, conjugation and electronic impacts on the photoluminescence and electroluminescence properties of luminogens based on phosphindole oxide
Zhuang, Zeyan,Bu, Fan,Luo, Wenwen,Peng, Huiren,Chen, Shuming,Hu, Rongrong,Qin, Anjun,Zhao, Zujin,Tang, Ben Zhong
supporting information, p. 1836 - 1842 (2017/02/23)
Aggregation-induced emission (AIE) is currently receiving intense interest because of its important implications in photophysics. The structure-property relationship decipherment of AIE luminogens is of crucial importance for the fundamental understanding and application exploration. In this research, a series of novel luminogens based on phosphindole oxide (PIO), including a peculiar one with a folded conformation and apparent through-space conjugation, were synthesized and studied as models to elucidate the AIE mechanism. The significant impacts of steric, conjugation and electronic effects on the AIE property are presented based on the results of crystallography analysis, optical spectra measurements and theoretical computation. Non-doped yellow organic light-emitting diodes were fabricated with the new PIO-based luminogens, and they exhibited high brightness, good electroluminescence efficiencies and low efficiency roll-off.
Synthesis of substituted [8]cycloparaphenylenes by [2 + 2 + 2] cycloaddition
Tran-Van, Anne-Florence,Huxol, Elena,Basler, Jonathan M.,Neuburger, Markus,Adjizian, Jean-Joseph,Ewels, Chris P.,Wegner, Hermann A.
supporting information, p. 1594 - 1597 (2014/04/17)
A new modular approach to the smallest substituted cycloparaphenylenes (CPPs) is presented. This versatile method permits access to substituted CPPs, choosing the substituent at a late stage of the synthesis. Variously substituted [8]CPPs have been synthesized, and their properties analyzed. The structural characteristics of substituted CPPs are close to those of unsubstituted CPPs. However, their optoelectronic behavior differs remarkably due to the larger torsion angle between the phenyl units.
