DOI: 10.1002/anie.198909141. Induction of Liquid Crystalline Phases: Formation of Discotic Systems by Doping Amorphous Polymers with Electron Acceptors

Induction of Liquid Crystalline Phases: Formation of Discotic Systems by Doping Amorphous Polymers with Electron Acceptors

10.1002/anie.198909141

Crossref journal-article

Wiley

Angewandte Chemie International Edition in English (311)

Bibliography

Ringsdorf, H., WÃ¼stefeld, R., Zerta, E., Ebert, M., & Wendorff, J. H. (1989). Induction of Liquid Crystalline Phases: Formation of Discotic Systems by Doping Amorphous Polymers with Electron Acceptors. Angewandte Chemie International Edition in English, 28(7), 914â918. Portico.

Authors 5

Helmut Ringsdorf (first)
Renate Wüstefeld (additional)
Elfriede Zerta (additional)
Martina Ebert (additional)
Joachim H. Wendorff (additional)

References 37 Referenced 146

{'key': 'e_1_2_1_1_2', 'volume-title': 'Handbook of Liquid Crystals', 'author': 'Kelker H.', 'year': '1980'} / Handbook of Liquid Crystals by Kelker H. (1980)
10.1002/ange.19870990905
10.1002/anie.198708161
10.1080/00268948708074793
10.1080/00268948808075350
10.1002/ange.19870991129
10.1002/anie.198711781
10.1002/ange.19840960905
10.1002/anie.198406901
10.1016/0375-9601(79)90019-7
10.1246/bcsj.53.3079
10.1080/00268948708084626
(a)W.Kreuder Dissertation Universität Mainz1986;
(b)O.Karthaus Diplomarbeit Universität Mainz1988.
10.1002/marc.1983.030041210
10.1002/marc.1986.030070211
10.1002/marc.1985.030060513
10.1002/marc.1985.030060812
10.1002/marc.1988.030090509
(f)O.Herrmann‐Schönherr Dissertation Technische Hochschule Darmstadt1981.
{'key': 'e_1_2_1_7_2', 'first-page': '379', 'volume': '1987', 'author': 'Sirlin C.', 'journal-title': 'J. Chem. Soc. Chem. Commun.'} / J. Chem. Soc. Chem. Commun. by Sirlin C.
{'key': 'e_1_2_1_7_3', 'first-page': '703', 'volume': '1987', 'author': 'Beck A.', 'journal-title': 'Synthesis'} / Synthesis by Beck A.
(c) [6c].
The discoid side‐group polymers were obtained by radical polymerization of acrylates and methacrylates in solution. Relative molecular weights of the discoid polymethacrylate1from GPC measurements:MGPC1= 3800 000 g mol−1(polystyrene (PS) standard THF measurement of the refractive index (RI detection)) MGPC2= 4300 000 g mol−1(polymethylmethacrylate standard THF RI detection): this corresponds to degrees of polymerizationPof 3900 and 5500 respectively. Relative molecular weight of discoid polyacrylate2:MGPC= 380 000 g mol−1(PS standard CHCI3 UV detection) corresponds toP= 370.
The main‐chain polyesters3a‐3cwere each obtained by melt condensation of an isomeric mixture [6 a c] of two triphenylenediacetates and the corresponding 1 ω‐dicarboxylic acids (catalyst:p‐toluenesulfonic acid).3c:MGPC= 13 000 g mol−1(PS standard CHCI3 UV detection); corresponds toP= 14.
10.1149/1.2131288
Upon combination of the colorless and yellow solutions respectively of the polymer and electron acceptor (in dichloromethane or THF) the color turned red (3/TNF) or violet (1 2/TNF). The mixtures were stirred for several hours at room temperature. Evaporation of the solvent resulted in separation of a black film which was dried under oil‐pump vacuum for one to two days.
Ortholux II POL‐BK (Leitz) microscope used for polarization microscopy investigations; DSC‐4 (Perkin‐Elmer) calorimeter used for differential calorimetry investigations heating and cooling rate = 20 K min−1(the melting and clearing temperatures were taken from the peak maxima the glass transition temperatures were taken from the inflection point of the curve); X‐ray diffraction measurements with nickel‐filtered CuKαradiation (λ = 0.154 nm) (oriented samples were obtained by stretching or by applying pressure at a given direction of flow [6b]).
10.1021/ac60065a016
10.1051/jphyslet:0197900400408100
10.1080/02678298608086498
Taking the hexagonal lattice parameter and the intracolumnar distance (see Table 2) it is possible to calculate the densities ϱ1and ϱ2for different arrangements of the TNF molecules in the liquid crystalline phase (see Table 3). ϱ1= all TNF molecules are arranged within the columns; ϱ2= no TNF molecule is arranged within a column that is all TNF molecules are located in the region between the columns. For the 1/1 Table 3. Calculated and experimentally found densities of liquid crystalline phases of polymer 3c with TNF. mixture the measured ϱ3value agrees with the ϱ2value. For the 2/1 mixture the measured density ϱ3is higher than the ϱ2value; in this case the structural arrangement appears to be more complex.
10.1002/pol.1970.150081003
10.1021/ma00155a011
10.1021/ma00155a012
The polymalonate4was obtained by TiIV‐catalyzed transesterification of a triphenylene malonate with dodecanediol [5 b].
Discotic‐columnar phases can also be induced in low molecular weight discoid systems through CT interactions for example by addition of TNF to non‐liquid‐crystalline triphenylene derivatives or to discotic‐nematic hexaphenylethynylene benzenes:M.Ebert B.Kohne K.Praefcke H.Ringsdorf J. H.Wendorff R.Wüstefeld E.Zerta unpublished results.

Dates

Type	When
Created	21 years, 7 months ago (Dec. 31, 2003, 3:43 a.m.)
Deposited	1 year, 10 months ago (Oct. 22, 2023, 9:07 a.m.)
Indexed	1 year, 4 months ago (April 6, 2024, 1:13 a.m.)
Issued	36 years, 1 month ago (July 1, 1989)
Published	36 years, 1 month ago (July 1, 1989)
Published Online	21 years, 7 months ago (Dec. 30, 2003)
Published Print	36 years, 1 month ago (July 1, 1989)

Funders 0

None

BibTeX

@article{Ringsdorf_1989, title={Induction of Liquid Crystalline Phases: Formation of Discotic Systems by Doping Amorphous Polymers with Electron Acceptors}, volume={28}, ISSN={0570-0833}, url={http://dx.doi.org/10.1002/anie.198909141}, DOI={10.1002/anie.198909141}, number={7}, journal={Angewandte Chemie International Edition in English}, publisher={Wiley}, author={Ringsdorf, Helmut and Wüstefeld, Renate and Zerta, Elfriede and Ebert, Martina and Wendorff, Joachim H.}, year={1989}, month=jul, pages={914–918} }

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