2005
DOI: 10.1002/pola.20606
|View full text |Cite
|
Sign up to set email alerts
|

Synthesis and optical and electrochemical properties of thermotropic, liquid‐crystalline, semirigid copolyesters based on 2,5‐diphenyl‐1,3,4‐thiadiazole units

Abstract: Novel thermotropic liquid-crystalline (LC) copolyesters were prepared with three disubstituted (4,4Ј-, 3,4Ј-, and 3,3Ј-) dioxydiundecanol derivatives of terphenyl analogues of 1,3,4-thiadiazole [2,5-diphenyl-1,3,4-thiadiazole (DPTD)], and their optical and electrochemical properties were examined. Their structures were characterized with Fourier transform infrared, 1 H NMR spectroscopy, and elemental analyses. The thermal and mesomorphic properties of the copolyesters were investigated with differential scanni… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

2
11
0

Year Published

2007
2007
2016
2016

Publication Types

Select...
6

Relationship

4
2

Authors

Journals

citations
Cited by 23 publications
(13 citation statements)
references
References 51 publications
2
11
0
Order By: Relevance
“…1 In this framework, we have chosen, poly(aryl-ethynylene)s (PAEs) polymers that exhibit promising semiconducting and optoelectronic properties, especially when containing electron-donating and electron-accepting heterocycles linked by ethynylene bridges (-C≡C-). [5][6][7][8] Different research groups have investigated the use of PAEs and hyperbranched PAEs as molecular wires, OLEDs, OSCs, OTFTs and fluorescent chemical sensors. [9][10][11][12][13][14] The interesting electronic properties exhibited by PAEs can be related to the axial symmetry of ethynylene groups, which allows to maintain the conjugation (note that between adjacent aryl groups at different relative orientations rotational barriers are as small as 1 kcal mol -1 in these cases) [15][16][17][18][19][20] across the whole molecular backbone.…”
Section: Introductionmentioning
confidence: 99%
“…1 In this framework, we have chosen, poly(aryl-ethynylene)s (PAEs) polymers that exhibit promising semiconducting and optoelectronic properties, especially when containing electron-donating and electron-accepting heterocycles linked by ethynylene bridges (-C≡C-). [5][6][7][8] Different research groups have investigated the use of PAEs and hyperbranched PAEs as molecular wires, OLEDs, OSCs, OTFTs and fluorescent chemical sensors. [9][10][11][12][13][14] The interesting electronic properties exhibited by PAEs can be related to the axial symmetry of ethynylene groups, which allows to maintain the conjugation (note that between adjacent aryl groups at different relative orientations rotational barriers are as small as 1 kcal mol -1 in these cases) [15][16][17][18][19][20] across the whole molecular backbone.…”
Section: Introductionmentioning
confidence: 99%
“…Band gap energies ( E g ) of the HBP1‐6 estimated from the extraporated UV‐vis absorption edges in the solid states were 3.04–3.17 eV, which are comparable to or lower than those in the homo‐ and copolyesters composed of the DTD unit 20, 21. The quantum efficiencies ( Φ ) measured in the solutions using coumarin311 as a standard were 9.4–9.8% in the polymers (HBP1‐3) by the melt polycondendation and 9.1–13% in those (HBP4‐6) via the solution approach, which are the highest in the HBP5 polymer having the highest inherent viscosity and forming the most stable LC state.…”
Section: Resultsmentioning
confidence: 50%
“…1,2,3‐Propane‐tricarboxylic acid (B 3 ) was used after recrystallization from chloroform. 2,5‐Bis[4‐(11‐hydroxyundecyloxy)phenyl]‐1,3,4‐thiadiazole (A 2 ) and linear homopolyester (SPLP), derived from the A 2 monomer and azelaic acid, were synthesized according to our previously‐reported method 21–26…”
Section: Methodsmentioning
confidence: 99%
See 2 more Smart Citations