Synthesis, Characterization of An Unsymmetrical Cu(II) Complex Liquid Crystal of a Schiff Base Containing a Terminal Double Bond

1999 ◽  
Vol 29 (9) ◽  
pp. 1611-1624
Author(s):  
Siwei Bi
Keyword(s):  
Schiff Base ◽  
Liquid Crystal ◽  
Double Bond ◽  
Terminal Double Bond ◽  
Complex Liquid

New 1,3-dioxane type ionic liquid crystal materials having a terminal double bond

2000 ◽  
Vol 27 (2) ◽  
pp. 263-267 ◽  
Author(s):  
Yuichiro Haramoto ◽  
Yoshiharu Kusakabe ◽  
Masato Nanasawa ◽  
Seiji Ujiie ◽  
Stephan Mang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Liquid Crystal ◽  
Double Bond ◽  
Terminal Double Bond ◽  
Liquid Crystal Materials

Preparation and characterization of high performance Schiff-base liquid crystal diepoxide polymer

2012 ◽  
Vol 132 (2-3) ◽  
pp. 950-956 ◽  
Author(s):  
Huan Liu ◽  
Zi-en Fu ◽  
Kai Xu ◽  
Hua-lun Cai ◽  
Xin Liu ◽  
...  
Keyword(s):  
Schiff Base ◽  
Liquid Crystal ◽  
High Performance ◽  
Base Liquid

Synthesis and Characterization of Some New Esters Containing Heterocyclic and Derived From Azo Dyes

2019 ◽  
Vol 9 (02) ◽  
Author(s):  
Zena G. Alrecabi ◽  
Zainab Amer ◽  
Naeemah Al-Lami
Keyword(s):  
Schiff Base ◽  
13C Nmr ◽  
Azo Dyes ◽  
Spectral Methods ◽  
Anthranilic Acid ◽  
Heterocyclic Compounds ◽  
Synthesis And Characterization ◽  
Cooh Group ◽  
Molecular Weights

This study including prepared new colored esters containing heterocyclic with high molecular weights. In the first part of work we synthesized azo dyes [1,2] from the reaction p-toluidine with β-naphthol and o-nitro phenol, thin we synthesized Schiff bases [3,4] by the reaction anthranilic acid with benzaldehyde and dimethyl benzaldehyde. The reaction azo dyes (contain OH group) with Schiff base (contain COOH group) these led to produce the new colored esters [A1-A4]. The second part of work was modification the (C=N-) group in esters to heterocyclic compounds by reacting with phenyl iso cyanide to produce new β-lactam [B1-B4] and with anthranilic acid to get new hydroquinazoline [C1-C4]. All these compounds were characterized by physical properties and spectral methods FTIR, 1H-NMR and 13C-NMR.

MNDO CI study of the photoisomerization of pentadieniminium

1990 ◽  
Vol 55 (12) ◽  
pp. 2874-2879 ◽  
Author(s):  
Peter Ertl
Keyword(s):  
Schiff Base ◽  
Double Bond ◽  
Configuration Interaction ◽  
Mndo Method ◽  
Double Bonds

Photoisomerization mechanism in model retinal-like protonated Schiff base pentadieniminium was investigated by using MNDO method with configuration interaction. Isomerizations around various double bonds were studied and twisted biradical geometries in S0 and S1 states were optimized. Photoisomerization proceeds exclusively around the central double bond where the twisted S1 state is strongly stabilized and the S0-S1 gap is minimal.

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