N-Carbeniopyridinium salts: Charge-transfer complexes with the C5 (COOMe)5 anion; C?C bond formation with the TCNQ radical anion

1990 ◽  
Vol 3 (7) ◽  
pp. 459-469 ◽  
Author(s):  
Gerhard Maas ◽  
Hans Martin Weber ◽  
Reiner Exner ◽  
Josef Salbeck
Keyword(s):  
Charge Transfer ◽  
Radical Anion ◽  
Bond Formation ◽  
Charge Transfer Complexes

Gelification Effects on the Structure and Birefringence of Charge Transfer Complex Terthiophene Bisililated – TCNQ Hybrid Materials

2006 ◽  
Vol 517 ◽  
pp. 257-261
Author(s):  
N. Kancono ◽  
H.B. Senin
Keyword(s):  
Charge Transfer ◽  
Detection Limit ◽  
Hybrid Materials ◽  
Vibrational Spectra ◽  
Lamellar Structure ◽  
Radical Anion ◽  
Charge Transfer Complex ◽  
Visible Spectrum ◽  
Charge Transfer Complexes

Charge transfer complexes (CTC) can be readily introduced into materials by cohydrolysis-copolymerisation of bis-silylated ter-thiophenes as precursors with TMOS and TEOS in the presence of TCNQ. CTC formation is shown in the visible spectrum of the xerogel by the band at 850 nm characteristic of the TCNQ·- radical anion. Vibrational spectra have shown that strong vibration of C≡N bond at 2184, 2120 and 1595 cm-1 as peaks characteristics of CTC. The CTC bands are weak and the complex is easily destroyed by washing with acetone, which removes the TCNQ. The gelification effect of the charge transfer complexes on the hybrid materials of 2,5’’- bis(trime thoxysilyl)terthiophene/TCNQ/ TMOS showed that the peak with distance of more than 11.68 Å, formed by precursors and matrices, as a lamellar structure. The birefringence of xerogel BTS3T in presence of alkoxysilane showed that the value is near the detection limit of 0.1 – 0.4 x 10-3, which is weaker than BTS3T / THF with the birefringence value of 4.5 x 10-3.

Radical anion salts and charge-transfer complexes of bridged DCNQIS

1991 ◽  
Vol 42 (1-2) ◽  
pp. 1823-1826
Author(s):  
S. Hünig ◽  
K. Sinzger ◽  
U. Langohr ◽  
H. Rieder ◽  
S. Söderholm ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Radical Anion ◽  
Charge Transfer Complexes

Studies on Charge-Transfer and Hydrogen Bond Formation with Cyproheptadine

2001 ◽  
Vol 215 (7) ◽  
Author(s):  
J. Gangopadhyay ◽  
Sujit Chandra Lahiri
Keyword(s):  
Hydrogen Bond ◽  
Charge Transfer ◽  
Complex Formation ◽  
Hydrogen Bonds ◽  
Bond Formation ◽  
Charge Transfer Complexes ◽  
Hydrogen Bond Formation

Cyproheptadine, an antihistaminic and antipruritic drug, forms fairly stable charge-transfer complexes with quinone (Q), chloranil (Chl-Q) and anthraquinone (AQ) in chloroform. It also forms stable hydrogen bonds with alcohols (methanol and propanol) and phenols (α-naphthol,The results suggest that cyproheptadine can form loose association with receptors through charge-transfer and hydrogen bond complex formation.

Synthesis of novel chloro-substituted N,N′-dicyanoquinonediimines. Formation of charge transfer complexes and copper radical-anion salts

1994 ◽  
Vol 64 (1) ◽  
pp. 83-89 ◽  
Author(s):  
Nazario Martín ◽  
JoséL. Segura ◽  
Carlos Seoane ◽  
Cristina Torío ◽  
Araceli González ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Radical Anion ◽  
Charge Transfer Complexes
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