Poly(para-phenyleneethynylene)s as emitters in polymer LEDs

2018 ◽  
Vol 6 (41) ◽  
pp. 11002-11006 ◽  
Author(s):  
Emanuel Smarsly ◽  
Dominik Daume ◽  
Felix Braig ◽  
Silke Koser ◽  
Edgar Dörsam ◽  
...  
Keyword(s):  
Sonogashira Coupling ◽  
Polymer Leds

11 different dialkoxy- and dialkyl-poly(para-phenyleneethynylene)s (PPE)s featuring novel branched and literature described sidechains were prepared using a Sonogashira coupling. The materials were tested as emitters in thickness dependent OLED devices.

Probing the Versatility of Shape-Persistent Tetraphenylmethane Dendrimers by Modification of the Skeleton

2019 ◽  
Author(s):  
Julio Ignacio Urzúa ◽  
Sandra Campana ◽  
Massimo Lazzari ◽  
Mercedes Torneiro
Keyword(s):  
Design Principle ◽  
Focal Point ◽  
Sonogashira Coupling ◽  
Terminal Alkyne ◽  
Double Phase ◽  
Rigid Rod ◽  
Convergent Approach ◽  
First And Second Generation ◽  
Oxidative Homocoupling ◽  
Hypercrosslinked Polymers

Tetraphenylmethane has emerged as a recurrent building block for advanced porous materials such as COFs, PAFs and hypercrosslinked polymers. Guided by a similar design principle, we have previously synthesized shape-persistent dendrimers with tetraphenylmethane nodes and ethynylene linkers. Here we report the generality of our approach by describing new dendritic architectures built from tetraphenylmethane. First, we prepared expanded dendrimers where the tetrahedral units are bonded through larger rigid rod spacers. Among the different synthetic strategies tested, the convergent route, with alternating steps of Pd-catalyzed Sonogashira coupling and alkyne activation by removal of TMS masking groups, efficiently afforded the first- and second-generation dendrimers. A second type of compounds having a linear diyne at the core is also described. The dendrimers of generations 1-2 were also synthesized by a convergent approach, with the diyne being assembled in the last step of the synthesis by a Glaser oxidative homocoupling of the corresponding dendrons bearing a terminal alkyne at the focal point. A third-generation dendrimer was also successfully prepared by a double-phase strategy.<br>

New 2-Alkynyl Derivatives of the Acyclic Nucleoside 9-(2,3-Dihydroxypropyl)adenine and Their 6-Guanidinopurine Counterparts as Potential Effectors of Adenosine Receptors

2003 ◽  
Vol 68 (11) ◽  
pp. 2201-2218 ◽  
Author(s):  
Michal Česnek ◽  
Antonín Holý ◽  
Milena Masojídková
Keyword(s):  
Adenosine Receptors ◽  
Sonogashira Coupling ◽  
Acyclic Nucleoside ◽  
Derivatives Of

A series of the new 2-alkynyl derivatives of the acyclic nucleoside 9-(2,3-dihydroxypropyl)- adenine and their 6-guanidinopurine analogues were prepared by the Sonogashira coupling. The effect of the prepared compounds on A1 and A2A receptors was examined.

scholarly journals Head‐to‐Tail Oligomerization by Silylene‐Tethered Sonogashira Coupling on Ag(111)

2021 ◽  
Author(s):  
Kewei Sun ◽  
Keisuke Sagisaka ◽  
Lifen Peng ◽  
Hikaru Watanabe ◽  
Feng Xu ◽  
...  
Keyword(s):  
Sonogashira Coupling

Conjugated Polymer Surfaces and Interfaces for Light-Emitting Devices

MRS Bulletin ◽  
1997 ◽  
Vol 22 (6) ◽  
pp. 46-51 ◽  
Author(s):  
W.R. Salaneck ◽  
J.L. Brédas
Keyword(s):  
Conjugated Polymers ◽  
Photoelectron Spectroscopy ◽  
Electronic Materials ◽  
Structural Information ◽  
Molecular Solids ◽  
Chemical Modeling ◽  
Polymer Leds ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Surfaces And Interfaces

Since the discovery of high electrical conductivity in doped polyacetylene in 1977, π-conjugated polymers have emerged as viable semiconducting electronic materials for numerous applications. In the context of polymer electronic devices, one must understand the nature of the polymer surface's electronic structure and the interface with metals. For conjugated polymers, photoelectron spectroscopy—especially in connection with quantum-chemical modeling—provides a maximum amount of both chemical and electronic structural information in one (type of) measurement. Some details of the early stages of interface formation with metals on the surfaces of conjugated polymers and model molecular solids in connection with polymer-based light-emitting devices (LEDs) are outlined. Then a chosen set of issues is summarized in a band structure diagram for a polymer LED, based upon a “clean calcium electrode” on the clean surface of a thin film of poly(p-phenylene vinylene) (PPV). This diagram helps to point out the complexity of the systems involved in polymer LEDs. No such thing as “an ideal metal-on-polymer contact” exists. There is always some chemistry occurring at the interface.

ChemInform Abstract: 2,5-Bis(2-(diphenylphosphino)phenyl)-1,3,4-oxadiazole Ligands and Their Cu(I) Complexes for Sonogashira Coupling Reaction.

ChemInform ◽  
2014 ◽  
Vol 45 (35) ◽  
pp. no-no
Author(s):  
Cai-Xia Lin ◽  
Jia-Fang Zhu ◽  
Qing-Shan Li ◽  
Li-Hua Ao ◽  
Yan-Juan Jin ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Sonogashira Coupling ◽  
Sonogashira Coupling Reaction
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