TY  - JOUR
A1  - Emmerling, Franziska
A1  - Orgzall, Ingo
A1  - Dietzel, Birgit
A1  - Schulz, Burkhard
A1  - Larrucea, Julen
T1  - Ordering the amorphous - Structures in PBD LED materials
JF  - Journal of molecular structure
N2  - The class of 2,5 disubstituted-1,3,4-oxadiazoles containing a biphenyl unit on one side is intensively used as electron transport materials to enhance the performance of organic light emitting diodes (OLEDs). In contrast to the ongoing research on these materials insights in their structure-property relationships are still incomplete. To overcome the structural tentativeness and ambiguities the crystal structures of 2-(4-biphenylyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole, that of the related compound 2-(4-biphenylyl)-5-phenyl-1,3,4-oxadiazole and of 2-(4-biphenylyl)-5-(2,6-dimethylphenyl)-1,3,4-oxadiazole are determined. A comparison with the results of GAUSSIAN03 calculations and similar compounds in the Cambridge Structural Database leads to a profound characterization.
KW  - OLED
KW  - PBD
KW  - Diphenyl-1,3,4-oxadiazole
KW  - Crystallization
Y1  - 2012
U6  - https://doi.org/10.1016/j.molstruc.2012.04.040
SN  - 0022-2860
VL  - 1030
IS  - 23
SP  - 209
EP  - 215
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Sarauli, David
A1  - Xu, Chenggang
A1  - Dietzel, Birgit
A1  - Stiba, Konstanze
A1  - Leimkühler, Silke
A1  - Schulz, Burkhard
A1  - Lisdat, Fred
T1  - Thin films of substituted polyanilines interactions with biomolecular systems
JF  - Soft matter
N2  - We use substituted polyanilines for the construction of new polymer electrodes for interaction studies with the redox protein cytochrome c (cyt c) and the enzyme sulfite oxidase (SO). For these purposes four different polyaniline copolymers are chemically synthesized. Three of them are copolymers, containing 2-methoxyaniline-5-sulfonic acid with variable ratios of aniline; the fourth copolymer consists of 3-amino-benzoic acid and aniline. The results show that all polymers are suitable for being immobilized as thin stable films on gold wire and indium tin oxide (ITO) electrode surfaces from DMSO solution. This can be demonstrated by cyclic voltammetry and UV-Vis spectroscopy measurements. Moreover, cyt c can be electrochemically detected not only in solution, but also immobilized on top of the polymer films. Furthermore, the appearance of a significant catalytic current has been demonstrated for the sulfonated polyanilines, when the polymer-coated protein electrode is being measured upon addition of sulfite oxidase, confirming the establishment of a bioanalytical signal chain. Best results have been obtained for the polymer with highest sulfonation grade. The redox switching of the polymer by the enzymatic reaction can also be analyzed by following the spectral properties of the polymer electrode.
Y1  - 2012
U6  - https://doi.org/10.1039/c2sm07261k
SN  - 1744-683X
VL  - 8
IS  - 14
SP  - 3848
EP  - 3855
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  -