853377-11-4Relevant articles and documents
Self-assembly of pyrene boronic acid-based chemodosimeters for highly efficient mercury(II) ion detection
Lee, Sun Woo,Lee, Seung Yeob,Lee, Seoung Ho
, (2019)
A new chemodosimeter consisting of pyrene and boronic acid (1) for the detection of Hg2+ ions is described. The amphiphilic nature of 1 leads to self-assembly in aqueous solution and the high electron density throughout the aggregated pyrene units provides an outstanding platform for energy and electron transport. Self-assembled 1 exhibits a selective and sensitive fluorescence response to Hg2+ ions, where the Hg2+ ion allows a fast transmetallation of 1, which drastically reduces its fluorescence. The Stern-Volmer (SV) quenching constant for the fluorescence quenching of self-assembled 1 by Hg2+ ions is approximately 1.8 × 106 M?1, and Hg2+ ions can be sensed with a detection limit of 6.6 × 10?9 M. In addition, self-assembled 1 exhibits excellent sensing performance at nano-molar concentration levels for Hg2+ ion contamination of tap water, fresh water, and seawater.
Pyrene-based compound and organic light emitting diode comprising the same
-
Paragraph 0299-0305, (2020/05/19)
A pyrene-based compound, and an organic light-emitting diode including the pyrene-based compound are provided.
Comparison Study of the Site-Effect on Regioisomeric Pyridyl-Pyrene Conjugates: Synthesis, Structures, and Photophysical Properties
Lu, Qing,Kole, Goutam Kumar,Friedrich, Alexandra,Müller-Buschbaum, Klaus,Liu, Zhiqiang,Yu, Xiaoqiang,Marder, Todd B.
, p. 4256 - 4266 (2020/03/23)
To investigate the "site effect" of pyridyl substituents on a pyrene core, four regioisomeric monopyridyl-pyrene (1-4) and five regioisomeric dipyridyl-pyrene (5-9) conjugates were synthesized and characterized and their structures confirmed by single-crystal X-ray diffraction. The photophysical properties and related frontier orbital features of these compounds have been studied both experimentally and theoretically and demonstrate the dependence of the properties of the compounds on the position of substitution of the pyridyl moieties connecting to the pyrene core. It was found that the absorption spectra of 2- A nd 4-substituted pyrene derivatives display similar and weak influence on the S2 a? S0 excitations, whereas they are quite different from those of 1-substituted isomers. The emission spectra of 1- A nd 4-substituted pyrenes are quite similar, whereas those of 2-substituted isomers display the largest bathochromic shift. The 1,6-disubstituted compound 5 exhibits a near-unity emission quantum yield in solution, which is nearly three times higher than those of other regioisomeric dipyridyl-pyrenes. In addition, the tetrasubstituted 1,6-dipyridyl-3,8-di-n-butyl-pyrene (10) exhibits the highest solid-state quantum yield of 0.24 among all of the 10 pyridyl-pyrenes prepared in this study.
