Odd−Even Effects and the Influence of Length and Specific Positioning of Alkoxy Side Chains on the Optical Properties of PPE−PPV Polymers

2005 ◽  
Vol 17 (24) ◽  
pp. 6022-6032 ◽  
Author(s):  
Daniel Ayuk Mbi Egbe ◽  
Christoph Ulbricht ◽  
Thomas Orgis ◽  
Benjamin Carbonnier ◽  
Thomas Kietzke ◽  
...  
Keyword(s):  
Optical Properties ◽  
Side Chains

Theoretical study of charge-transport and optical properties of indeno[1,2-b]fluorene-6,12-dione-based semiconducting materials

2018 ◽  
Vol 74 (6) ◽  
pp. 705-711 ◽  
Author(s):  
Jin-Dou Huang ◽  
Jinfeng Zhao ◽  
Kun Yu ◽  
Xiaohua Huang ◽  
Shi-Bo Cheng ◽  
...  
Keyword(s):  
Optical Properties ◽  
Charge Transport ◽  
Near Infrared ◽  
Reorganization Energy ◽  
Hole Mobility ◽  
Side Chains ◽  
Semiconducting Materials ◽  
Π Stacking ◽  
Electron Transfer Theory ◽  
Reorganization Energies

The conducting and optical properties of a series of indeno[1,2-b]fluorene-6,12-dione (IFD)-based molecules have been systematically studied and the influences of butyl, butylthio and dibutylamino substituents on the reorganization energies, intermolecular electronic couplings and charge-injection barriers of IFD have been discussed. The quantum-chemical calculations combined with electron-transfer theory reveal that the incorporation of sulfur-linked side chains decreases reorganization energy associated with hole transfer and optimizes intermolecular π–π stacking, which results in excellent ambipolar charge-transport properties (μh = 1.15 cm2 V−1 s−1 and μe = 0.08 cm2 V−1 s−1); in comparison, addition of dibutylamino side chains increases intermolecular steric interactions and hinders perfect intermolecular π–π stacking, which results in the weak electronic couplings and finally causes the low intrinsic hole mobility (μh = 0.01 cm2 V−1 s−1). Furthermore, electronic spectra of butyl-IFD, butylthio-IFD and dibutylamino-IFD were simulated and compared with the reported experimental data. Calculations demonstrate that IFD-based molecules possess potential for developing novel infrared and near-infrared probe materials via suitable chemical modifications.

Optical properties of polymethacrylate with styrylquinoline side chains

2015 ◽  
Author(s):  
B. Derkowska-Zielinska ◽  
V. Figà ◽  
O. Krupka ◽  
V. Smokal
Keyword(s):  
Optical Properties ◽  
Side Chains

Optical properties of polyfluorene–thiophene copolymers having chiral side chains

2009 ◽  
Vol 159 (21-22) ◽  
pp. 2180-2183 ◽  
Author(s):  
T. Hirahara ◽  
M. Yoshizawa-Fujita ◽  
Y. Takeoka ◽  
M. Rikukawa
Keyword(s):  
Optical Properties ◽  
Side Chains

Synthesis, Optical and Electrical Properties of Oligo(phenylenevinylene)s Substituted with Electron-Accepting Sulfonyl Groups

2010 ◽  
Vol 75 ◽  
pp. 103-107 ◽  
Author(s):  
Volker Schmitt ◽  
Stefan Glang ◽  
Heiner Detert
Keyword(s):  
Cyclic Voltammetry ◽  
Optical Properties ◽  
Electrical Properties ◽  
Side Chains ◽  
Optical And Electrical Properties ◽  
Redox Potentials ◽  
Solid Films ◽  
Good Solubility ◽  
Orange Region

Oligo(phenylenevinylene)s (OPV) composed of five rings and electron donating or withdrawing sulfonyl substituents on the central and lateral rings have been investigated. Two strategies were used for the syntheses of the C2-symmetrical OPVs both include PO-activated olefinations as central steps. Six flexible side chains guarantee good solubility in toluene or dichloromethane. In solution and in films stabilised by polystyrene (60%), the chromophores are strongly fluorescent, with emissions in the violet-blue domain from solutions and in the green to orange region from solid films. The redox potentials, determined by cyclic voltammetry, and the optical properties are strongly depending on the position of the acceptor groups.

scholarly journals Highly Coplanar Polythiophenes with –C≡CR Side Chains: Self-Assembly, Linear and Nonlinear Optical Properties, and Piezochromism

2009 ◽  
Vol 82 (7) ◽  
pp. 896-909 ◽  
Author(s):  
Takakazu Yamamoto ◽  
Takao Sato ◽  
Takayuki Iijima ◽  
Masahiro Abe ◽  
Hiroki Fukumoto ◽  
...  
Keyword(s):  
Optical Properties ◽  
Self Assembly ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Side Chains ◽  
Linear And Nonlinear

Tristriazolotriazines with π-Conjugated Segments: Star-Shaped Fluorophors and Discotic Liquid Crystals

2012 ◽  
Vol 77 ◽  
pp. 118-123 ◽  
Author(s):  
Stefan Glang ◽  
Dorothee Borchmann ◽  
Thorsten Rieth ◽  
Heiner Detert
Keyword(s):  
Optical Properties ◽  
Electronic Structure ◽  
Liquid Crystals ◽  
Cyanuric Chloride ◽  
Side Chains ◽  
Discotic Liquid Crystals ◽  
Ring Transformation ◽  
Non Linear ◽  
Donor Acceptor ◽  
Linear Optical Properties

C3-symmetrical tristriazolotriazines substituted with phenylene rings carrying lateral flexible alkoxy side chains were prepared via condensation/ring transformation of cyanuric chloride and tetrazoles. These star-shaped, planar compounds can form broad thermotropic mesophases. Due to the extensive π-conjugation, these compounds are highly emissive and the octupolar donor-acceptor electronic structure results in non-linear optical properties like solvatochromism. Brønstedt acids provoke halochromism of the absorption and of the fluorescence.

Tuning the Light Absorption of Donor–Acceptor Conjugated Polymers: Effects of Side Chains and ‘Spacer' Units in Thieno[3,4-b]pyrazine-Fluorene Copolymers

2015 ◽  
Vol 68 (11) ◽  
pp. 1759 ◽  
Author(s):  
Michael E. Mulholland ◽  
Kristine L. Konkol ◽  
Trent E. Anderson ◽  
Ryan L. Schwiderski ◽  
Seth C. Rasmussen
Keyword(s):  
Optical Properties ◽  
Conjugated Polymers ◽  
Band Gap ◽  
Material Properties ◽  
Light Absorption ◽  
Photovoltaic Device ◽  
Electrochemical Characterization ◽  
Side Chains ◽  
Electronic And Optical Properties ◽  
Donor Acceptor

Four donor–acceptor (D-A) copolymers of 2,3-difunctionalized thieno[3,4-b]pyrazine (TP) and 9,9-dioctylfluorene were prepared in order to illustrate the ability to tune the electronic and optical properties of TP-based D-A polymers by the choice of side chains on the TP unit. In addition, analogous polymers were prepared with and without thiophene spacer units in order to allow discussion of their effect on the material properties. This combination of effects allowed tuning of the band gap over the range of 1.6–2.1 eV. Full optical and electrochemical characterization is reported for all materials, as well as initial photovoltaic device data for representative materials.

Synthesis and electro-optical properties of polyurethanes with nitrostilbene side chains

1996 ◽  
Vol 197 (12) ◽  
pp. 4135-4153 ◽  
Author(s):  
Shengyu Jin ◽  
Michael Wübbenhorst ◽  
Jan Van Turnhout ◽  
Wim Mijs
Keyword(s):  
Optical Properties ◽  
Side Chains
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