Photophysical Properties of Oligo­(phenylene ethynylene) Iridium(III) Complexes Functionalized with Metal-Anchoring Groups

2016 ◽  
Vol 2016 (12) ◽  
pp. 1851-1859 ◽  
Author(s):  
Julia Ponce ◽  
Juan Aragó ◽  
Ignacio Vayá ◽  
Jorge Gómez Magenti ◽  
Sergio Tatay ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Phenylene Ethynylene ◽  
Anchoring Groups

Naphthalimide-containing conjugated polyelectrolytes with different chain configurations

2019 ◽  
Vol 17 (10) ◽  
pp. 2635-2639 ◽  
Author(s):  
Yu Chen ◽  
Ying Tan ◽  
Chunyan Tan ◽  
Yunpeng Lu ◽  
Yuzong Chen ◽  
...  
Keyword(s):  
Polymer Chain ◽  
Photophysical Properties ◽  
Phenylene Ethynylene ◽  
Conjugated Polyelectrolytes

Different polymer chain configurations along the main chains of poly(naphthalimide and phenylene ethynylene)s lead to dramatic differences in polymer conformations and photophysical properties.

scholarly journals Electrical properties and mechanical stability of anchoring groups for single-molecule electronics

2015 ◽  
Vol 6 ◽  
pp. 1558-1567 ◽  
Author(s):  
Riccardo Frisenda ◽  
Simge Tarkuç ◽  
Elena Galán ◽  
Mickael L Perrin ◽  
Rienk Eelkema ◽  
...  
Keyword(s):  
Single Molecule ◽  
Density Functional ◽  
Mechanical Stability ◽  
Phenylene Ethynylene ◽  
Current Voltage ◽  
Single Molecule Electronics ◽  
Level Model ◽  
Anchoring Groups ◽  
Experimental Findings

We report on an experimental investigation of transport through single molecules, trapped between two gold nano-electrodes fabricated with the mechanically controlled break junction (MCBJ) technique. The four molecules studied share the same core structure, namely oligo(phenylene ethynylene) (OPE3), while having different aurophilic anchoring groups: thiol (SAc), methyl sulfide (SMe), pyridyl (Py) and amine (NH2). The focus of this paper is on the combined characterization of the electrical and mechanical properties determined by the anchoring groups. From conductance histograms we find that thiol anchored molecules provide the highest conductance; a single-level model fit to current–voltage characteristics suggests that SAc groups exhibit a higher electronic coupling to the electrodes, together with better level alignment than the other three groups. An analysis of the mechanical stability, recording the lifetime in a self-breaking method, shows that Py and SAc yield the most stable junctions while SMe form short-lived junctions. Density functional theory combined with non-equlibrium Green’s function calculations help in elucidating the experimental findings.

Mixed Alkyl- and Alkoxy-Substituted Poly[(phenylene ethynylene)-alt-(phenylene vinylene)] Hybrid Polymers: Synthesis and Photophysical Properties

2004 ◽  
Vol 205 (15) ◽  
pp. 2105-2115 ◽  
Author(s):  
Daniel Ayuk Mbi Egbe ◽  
Stephan Sell ◽  
Christoph Ulbricht ◽  
Eckhard Birckner ◽  
Ulrich-Walter Grummt
Keyword(s):  
Photophysical Properties ◽  
Phenylene Vinylene ◽  
Phenylene Ethynylene ◽  
Hybrid Polymers

Morphology and Photophysical Properties of Electrospun Light-Emitting Polystyrene/Poly(p-phenylene ethynylene) Fibers

2008 ◽  
Vol 293 (12) ◽  
pp. 952-963 ◽  
Author(s):  
Sutheerat Changsarn ◽  
James D. Mendez ◽  
Christoph Weder ◽  
Pitt Supaphol
Keyword(s):  
Photophysical Properties ◽  
Phenylene Ethynylene ◽  
Light Emitting

Solvent Dependence of Structural Dynamics and Spin-flip Processes in 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (ortho-3CzBN)

2020 ◽  
Author(s):  
Masaki Saigo ◽  
Kiyoshi Miyata ◽  
Hajime Nakanotani ◽  
Chihaya Adachi ◽  
Ken Onda
Keyword(s):  
Dft Calculations ◽  
Excited States ◽  
Structural Changes ◽  
Photophysical Properties ◽  
Delayed Fluorescence ◽  
Time Resolved ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Solvent Dependence ◽  
Acetonitrile Solutions

We have investigated the solvent-dependence of structural changes along with intersystem crossing of a thermally activated delayed fluorescence (TADF) molecule, 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (o-3CzBN), in toluene, tetrahydrofuran, and acetonitrile solutions using time-resolved infrared (TR-IR) spectroscopy and DFT calculations. We found that the geometries of the S1 and T1 states are very similar in all solvents though the photophysical properties mostly depend on the solvent. In addition, the time-dependent DFT calculations based on these geometries suggested that the thermally activated delayed fluorescence process of o-3CzBN is governed more by the higher-lying excited states than by the structural changes in the excited states.<br>

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