Synthesis and characterization of carbon atom bridged heterocyclic polymers of specified conjugation length. 1. Novel polyterthiophenes

1990 ◽  
Vol 23 (11) ◽  
pp. 2848-2854 ◽  
Author(s):  
Samson A. Jenekhe
Keyword(s):  
Carbon Atom ◽  
Synthesis And Characterization ◽  
Conjugation Length ◽  
Heterocyclic Polymers

Synthesis and characterization of poly(pyrrole-co-2-nitrocinnamaldehyde) (PPNC), a new copolymer for solar cells applications

2019 ◽  
Vol 28 (4) ◽  
pp. 265-272 ◽  
Author(s):  
Hamou Gherras ◽  
Ahmed Yahiaoui ◽  
Aicha Hachemaoui ◽  
Abdelkader Belfedal ◽  
Abdelkader Dehbi ◽  
...  
Keyword(s):  
Proton Nuclear Magnetic Resonance ◽  
Synthesis And Characterization ◽  
Important Class ◽  
Visible Spectroscopy ◽  
Electrical Stability ◽  
Efficient Catalyst ◽  
Heterocyclic Polymers ◽  
Conjugated Copolymer ◽  
Aromatic Heterocyclic

The use of conductive polymers as a substitute for metallic conductors and semiconductors has attracted much attention in the literature. In particular, aromatic heterocyclic polymers constitute an important class since they possess chemical and electrical stability in both the oxidized (doped) and neutral (undoped) state. A series of poly(pyrrole- co-2-nitrocinnamaldehyde) were obtained via the condensation of pyrrole and 2-nitrocinnamaldehyde in chloroform using acid exchanged montmorillonite clay called maghnite-H+ as an efficient catalyst. The conjugated copolymer was characterized using proton nuclear magnetic resonance, ultraviolet–visible spectroscopy, Fourier transform infrared spectroscopy, and scanning electron microscopy.

High-performance wide-bandgap copolymers based on indacenodithiophene and indacenodithieno[3,2-b]thiophene units

2017 ◽  
Vol 5 (31) ◽  
pp. 7777-7783 ◽  
Author(s):  
Yunhao Cai ◽  
Xiaolong Zhang ◽  
Xiaonan Xue ◽  
Donghui Wei ◽  
Lijun Huo ◽  
...  
Keyword(s):  
High Performance ◽  
Wide Bandgap ◽  
Synthesis And Characterization ◽  
Conjugation Length

We demonstrated the synthesis and characterization of two polymers, IDT-T1 and IDTT-T1, to investigate the effect of extending the π-conjugation length on the properties of the copolymers.

Synthesis and Characterization of a New Polyfluorene Derivative with Well-Defined Conjugation Length

2002 ◽  
Vol 377 (1) ◽  
pp. 73-76
Author(s):  
Doo Jin Park ◽  
Yong Young Noh ◽  
Chae Min Chun ◽  
Jangjoo Kim ◽  
Dong-Yu Kim
Keyword(s):  
Synthesis And Characterization ◽  
Conjugation Length

Synthesis and characterization of a cyano-substituted electroluminescent polymer with well-defined conjugation length

2000 ◽  
Vol 363 (1-2) ◽  
pp. 110-113 ◽  
Author(s):  
M Cheng ◽  
Y Xiao ◽  
W.-L Yu ◽  
Z.-K Chen ◽  
Y.-H Lai ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Conjugation Length

scholarly journals Synthesis and Characterization of Bis[1]benzothieno[3,2-b:2′,3′-d]pyrroles: Quantitative Effects of Benzannulation on Dithieno[3,2-b:2′,3′-d]pyrroles

Molecules ◽  
2018 ◽  
Vol 23 (9) ◽  
pp. 2279 ◽  
Author(s):  
Rylan Wolfe ◽  
Evan Culver ◽  
Seth Rasmussen
Keyword(s):  
Comparative Analysis ◽  
Building Block ◽  
Synthesis And Characterization ◽  
Electronic Effects ◽  
Conjugated Materials ◽  
Conjugation Length ◽  
Detailed Characterization ◽  
Fused Ring ◽  
Electronic And Structural Properties

The synthesis of four N-functionalized bis[1]benzothieno[3,2-b:2′,3′-d]pyrroles (BBTPs) is reported in order to provide a more detailed characterization of these fused-ring units, as well as increase the scope of known BBTP units available for application to conjugated materials. The optical, electronic, and structural properties of the resulting BBTP units have been compared to the parent N-alkyl- and N-aryl-dithieno[3,2-b:2′,3′-d]pyrroles (DTPs), as well as their corresponding 2,6-diphenyl derivatives, in order to fully quantify the relative electronic effects resulting from benzannulation of the parent DTP building block. Such comparative analysis reveals that benzannulation results in a red-shifted absorbance, but to a lesser extent than simple phenyl-capping of the DTP. More surprising is that benzannulation results in stabilization of the BBTP HOMO, compared to the destabilization normally observed with extending the conjugation length of the backbone.

Synthese und Charakterisierung der Spezies R–C7H7Cr(CO)3 mit R = CH3COCH2-, CH3CO(CH3)CH-, CH3COCHCH(CH3)2– / Synthesis and Characterization of the Species R-C7H7Cr(CO)3 with R = CH3COCH2-, CH3CO(CH3)CH - , CH3COCHCH(CH3)2–

1979 ◽  
Vol 34 (7) ◽  
pp. 918-920 ◽  
Author(s):  
Farhad Zahedi ◽  
Manfred L. Ziegler
Keyword(s):  
Carbon Atom ◽  
Nucleophilic Addition ◽  
Nmr Spectra ◽  
Synthesis And Characterization ◽  
Ethyl Group ◽  
H Nmr

Abstract The species R-C7H7Cr(CO)3 (R = -CH2COCH3 , -CH(CH3)COCH3 , -CH(CH)CH3)2COCH3) have been synthesized by reaction of [η7-C7H7Cr(CO)3][BF4] with suitable ketones in the presence of bases like OH- and F- , suggesting a nucleophilic addition of the enolate ion to the cycloheptatrienyl ligand. 1H NMR spectra revealed the CH3-CO-CH(CH3) group being bonded to the cycloheptatriene ligand via the a-carbon atom of the ethyl group

scholarly journals New water-soluble isoxazole-linked 1,3,4-oxadiazole derivative with delocalized positive charge

RSC Advances ◽  
2021 ◽  
Vol 11 (47) ◽  
pp. 29668-29674
Author(s):  
Urszula Bąchor ◽  
Ewa Drozd-Szczygieł ◽  
Remigiusz Bąchor ◽  
Lucjan Jerzykiewicz ◽  
Robert Wieczorek ◽  
...  
Keyword(s):  
Carbon Atom ◽  
Positive Charge ◽  
Water Soluble ◽  
Synthesis And Characterization

Herein we present a synthesis and characterization of a new water soluble isoxazole-linked 1,3,4-oxadiazole derivative owing the local positive charge at the carbon atom of oxadiazole moiety.

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