186259-63-2Relevant articles and documents
Photophysical properties and optical power limiting ability of Pt(II) polyynes bearing fluorene-type ligands with ethynyl units at different positions
Tian, Zhuanzhuan,Yang, Xiaolong,Liu, Boao,Zhong, Daokun,Zhou, Guijiang
, p. 28 - 36 (2019/06/05)
Two series of Pt(II) polyynes bearing fluorene-type ligands with ethynyl units at different positions have been synthesized. In the absorption spectra, the Pt(II) polyynes bearing fluorene-type ligands with ethynyl units at 3,6-position have blue-shift with respect to the corresponding analogs bearing fluorene-type ligands with ethynyl units at 2,7-position, showing better transparency in the visible light region. Moreover, the Pt(II) polyynes bearing fluorene-type ligands with ethynyl units at 3,6-position show stronger triplet emission than corresponding analogs bearing fluorene-type ligands with ethynyl units at 2,7-position in the photoluminescent (PL) spectra. Furthermore, these Pt(II) polyynes were applied to optical power limiting (OPL) field. The Pt(II) polyynes bearing fluorene-type ligands with ethynyl units at 2,7-position show better OPL performance than the corresponding analogs with fluorene-type ligands of ethynyl units at 3,6-position. Therefore, changing the position of the ethynyl units in fluorene-type ligands can not only effectively control the photophysical properties of the Pt(II) polyynes, but also has an important effect on their OPL ability.
Fluorene derivative and organic light-emitting device prepared by same
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Paragraph 0080-0082, (2018/10/19)
The invention provides a fluorene derivative and an organic light-emitting device prepared by the same and relates to the technical field of organic photoelectric materials. The fluorene derivative and the organic light-emitting device prepared by the same have the advantages that the fluorene derivative is prepared by connecting substituted or unsubstituted condensed imidazole and condensed oxazole derivatives to a fluorene host, the prepared fluorene derivative has certain electron transport ability, the composition of holes and electrons on a light-emitting layer is benefited, and the fluorene derivative is good in stability and luminous efficiency, simple to synthesize, easy in synthesizing operation, capable of being used in the organic light-emitting device to serve as the light-emitting layer doping material and capable of effectively solving the problems that the blue light-emitting material in the organic light-emitting device is low in luminous efficiency and short in servicelife; the organic light-emitting device is high in luminous efficiency and long in service life.
Photochemical Degradation of Various Bridge-Substituted Fluorene-Based Materials
Kobin, Bj?rn,Behren, Sandra,Braun-Cula, Beatrice,Hecht, Stefan
, p. 5474 - 5480 (2016/07/30)
Photochemical degradation is an important issue to be overcome in advancing the lifetime of fluorene-containing conjugated polymers. In order to optimize the inertness of the materials, a quantitative measure for the efficiency of degradation is needed. Here, we introduce a method to measure a relative quantum yield of the photochemical degradation by monitoring the kinetics of the process by means of UV/vis spectroscopy and liquid chromatography (LC) techniques. This method is employed to a set of differently substituted 2,7-diphenylfluorenes, serving as model compounds for polyfluorene materials. Our measurements show that the quantum yield changes by orders of magnitude upon varying the bridge substituents and that altered kinetics indicate changing degradation mechanisms.