757245-44-6Relevant academic research and scientific papers
Linear and Star-Shaped Extended Di- and Tristyrylbenzenes: Synthesis, Characterization and Optical Response to Acid and Metal Ions
Bunz, Uwe H. F.,Freudenberg, Jan,Kotlear, Eugen A.,Kushida, Soh,Maier, Steffen,Rominger, Frank,Zhang, Hao
, (2020)
Two linear 1,4-distyrylbenzenes and five star-shaped 1,3,5-tristyrylbenzene derivatives (L2a and L2b, Y0–Y3 and YNBu) were synthesized and spectroscopically characterized. The photophysical properties, optical response to acid and metal ions were investigated. Upon backbone extension of linear distyrylbenzenes or the introduction of dibutylanilines, the electronic spectra are redshifted. Incorporation of electron-deficient pyridyl units does not significantly affect the optical properties. Variation of the number of pyridine rings and substitution pattern tune the fluorescence response to acids and metal ions. The novel arenes discriminate Al3+, Mn2+, Fe3+, Fe2+, Cd2+, Ag+ and Hg2+.
Dyes for sensitized solar cells by using [2.2]paracyclophane as a bridging unit
Huang, Chiung Hui,Chang, Yuan Jay
supporting information, p. 4938 - 4942 (2014/12/10)
Organic dyes that consist of a [2.2]paracyclophane moiety between a triphenylamine donor group and a cyanoacrylic acid acceptor group have exhibited considerably high values of open-circuit voltage (Voc) in the range of 0.69-0.74 V. In an exper
PHOSPHORESCENT ORGANIC COMPOUNDS
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, (2012/10/08)
Compositions providing metal-independent phosphorescence due to a directed heavy atom effect are provided. Methods of providing a phosphorescent composition are also provided where a directed heavy atom effect is maintained to cause the composition to be
Molecular structure-property engineering for photovoltaic applications: Fluorene-acceptor alternating conjugated copolymers with varied bridged moieties
Li, Yaowen,Li, Hui,Xu, Bin,Li, Zaifang,Chen, Feipeng,Feng, Dongqing,Zhang, Jibo,Tian, Wenjing
experimental part, p. 1786 - 1795 (2011/05/02)
A series of novel soluble conjugated copolymers consisting of electron-accepting 2-pyran-4-ylidenemalononitrile (PM) and electron-donating fluorene connected by different electron-donating ability conjugated moieties were synthesized by Suzuki coupling polymerization. The structures of the copolymers were characterized and their physical properties were investigated. High molecular weight (Mn up to 43.8 kg/mol) and thermostable copolymers were obtained. The conjugated bridge between PM and fluorene building block with gradually increased electron-donating ability moieties results in enhanced intramolecular charge transfer (ICT) transition bands, which lead to an extension of their absorption spectral range. Cyclic voltammetry measurement displayed that the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of the copolymers can be fine-tuned. The resulting copolymers possessed relatively low HOMO energy levels, promising good air stability and high open circuit voltage (Voc) for photovoltaic application. Bulk heterojunction photovoltaic devices were fabricated by using the copolymers as donors and (6,6)-phenyl C61-butyric acid methyl ester (PCBM) as acceptor. The power conversion efficiencies (PCE) of the devices were in the range of 0.02-0.52% under simulated AM 1.5 solar irradiation of 100 mW/cm2, and the highest Voc reached 0.82 V. The significant improvement of PCE indicates a novel concept for developing donor-acceptor (D-A) conjugated copolymers with high photovoltaic performance by adjusting electron-donating ability of conjugated bridge.
Star-shaped conjugated compounds forming nematic discotic systems
Meier, Herbert,Lehmann, Matthias,Holst, Hans Christof,Schw?ppe, Dirk
, p. 6881 - 6888 (2007/10/03)
Star-shaped compounds, having a benzene (9a,b) or a 1,3,5-triazine (11a,b) core and stilbenoid arms were prepared. Hexyloxy chains, attached in the middle of the arms, provide nematic discotic phases ND, which are unusual for such systems. The
