@article{ReicheDietelLemmetyinenetal.1992, author = {Reiche, J{\"u}rgen and Dietel, Reinhard and Lemmetyinen, Helge and Janietz, Dietmar and Lemmetyinen, Helge and Brehmer, Ludwig}, title = {Edge-on Langmuir-Blodgett multilayers derived from disc-shaped multiyne mesogens}, year = {1992}, abstract = {Langmuir-Blodgett(LB) multilayers were prepared from disc-shaped multiyne mesogens based on amphiphilic alkyl pentakis(aryl-ethynyl)benzene ethers. The two compounds used are characterized by five hydrophobic flexible chains and one hydrophilic substituent at the terminal position of the alkoxy chain. The LB films were analysed by X-ray scattering and spectroscopic measurements. An edge-on arrangement of the two discotic pentaalkynes within Y-type bilayers with a different packing density proved to be possible for the LB films of both compounds.}, language = {en} } @article{SchulzStillerZetzscheetal.1994, author = {Schulz, Burkhard and Stiller, Burkhard and Zetzsche, Thomas and Knochenhauer, Gerald and Dietel, Reinhard and Brehmer, Ludwig}, title = {Crystal structure of 2,5-Di(4- methoxycarbonyl-phenyl)-1,3,4-oxadiazole characterized by AFM and IR- spectroscopy}, year = {1994}, language = {en} } @article{BrumaMercerSchulzetal.1994, author = {Bruma, Maria and Mercer, Frank W. and Schulz, Burkhard and Dietel, Reinhard and Fitch, J. and Cassidy, Peter}, title = {Study of crosslinking process in fluorinated poly(imide-amide)s containing pendant cyano groups}, year = {1994}, language = {en} } @article{BrumaMercerSchulzetal.1994, author = {Bruma, Maria and Mercer, Frank W. and Schulz, Burkhard and Dietel, Reinhard and Neumann, Werner}, title = {Fluorinated poly(benzoxazole-imide)s}, year = {1994}, language = {en} } @article{BrumaMercerSchulzetal.1994, author = {Bruma, Maria and Mercer, Frank W. and Schulz, Burkhard and Dietel, Reinhard and Fitch, J. and Cassidy, Peter}, title = {Study of crosslinking process in fluorinated poly(imide-amide)s containing pendant cyano groups}, year = {1994}, language = {en} } @article{PenacoradaDietelReicheetal.1995, author = {Penacorada, Florencio and Dietel, Reinhard and Reiche, J{\"u}rgen and Zetzsche, Thomas and Knobloch, Harald and Katholy, Stefan and Brehmer, Ludwig}, title = {Studium des Einflusses von Uranyl-Gegenionen auf die Struktur von Langmuir- und Langmuir-Blodgett Filmen der Arachins{\"a}ure}, year = {1995}, language = {de} } @article{SchulzStillerZetzscheetal.1995, author = {Schulz, Burkhard and Stiller, Burkhard and Zetzsche, Thomas and Knochenhauer, Gerald and Dietel, Reinhard and Brehmer, Ludwig}, title = {Characterization of 2,5-di(p-tolyl-1,3,4- oxadiazole) crystals by IR-spectroscopy and atomic force microscopy}, year = {1995}, language = {en} } @article{RoeselerDietelKorte1995, author = {R{\"o}seler, A. and Dietel, Reinhard and Korte, E. H.}, title = {Characterizing LB-layers by IR-ellipsometry}, year = {1995}, language = {en} } @article{DietelPenacoradaBrehmer1995, author = {Dietel, Reinhard and Penacorada, Florencio and Brehmer, Ludwig}, title = {Structural variations in Langmuir-Blodgett layers of arachidic acid studied by FTIR-reflection absorption spectroscopy}, year = {1995}, language = {en} } @article{Dietel1995, author = {Dietel, Reinhard}, title = {FTIR-Reflexions-Absorptions-Spektroskopie an Langmuir-Blodgett-Schichten aus Arachidins{\"a}ure}, year = {1995}, language = {de} } @article{PenacoradaReicheDieteletal.1996, author = {Penacorada, Florencio and Reiche, J{\"u}rgen and Dietel, Reinhard and Zetzsche, Thomas and Stiller, Burkhard and Knobloch, Harald and Brehmer, Ludwig}, title = {Monolayers and multilayers of uranyl arachidate : 2. Influence of the subphase pH on the structure and stability of Langmuir-Blodgett films}, year = {1996}, abstract = {In this second paper we describe the comprehensive structure investigations on multilayers of uranyl arachidate formed by Langmuir-Blodgett deposition from subphases of different pH on solid substrates by means of a combination of infrared spectroscopy, X-ray specular reflection, ellipsometry, and scanning force microscopy, The structure of these multilayers and their stability are obviously influenced by the subphase pH. The pH range of the acid to salt conversion determined for the Langmuir films is confirmed by the infrared spectroscopic data of the multilayers. While arachidic acid films, deposited from an uranyl acetate subphase of low pH, are found to have strongly distorted rough surface, the films of uranyl structure, The influence of the counterions on the alkyl chain conformation, chain packing, reorganization probability, and stability of the multilayer is discussed.}, language = {en} } @article{ReicheKnochenhauerDieteletal.1997, author = {Reiche, J{\"u}rgen and Knochenhauer, Gerald and Dietel, Reinhard and Freydank, Anke-Christine and Zetzsche, Thomas and Pietsch, Ullrich and Brehmer, Ludwig and Barberka, Thomas Andreas and Geue, Thomas}, title = {Structure of thermally treated oxadiazoleamide Langmuir-Blodgett films}, year = {1997}, abstract = {The thermal treatment of Y-type Langmuir-Blodgett (LB) films formed from the amphiphilic derivative of 2,5- diphenyl-1,3,4-oxadiazole 1 results in changes of the molecular packing. These changes have been analysed by a combination of X-ray specular reflectivity data, X-ray grazing incidence diffraction data and scanning force microscopy images, On the basis of these experimental data we have simulated possible supramolecular structures, These simulations provide insight into the intermolecular interactions giving rise to the observed structural transitions. The crystalline structure induced by thermal treatment of the LB films is characterized by a uniaxial texture, which is correlated with the dipping direction during deposition of the LB film.}, language = {en} } @article{PenacoradaReicheZetzscheetal.1997, author = {Penacorada, Florencio and Reiche, J{\"u}rgen and Zetzsche, Thomas and Dietel, Reinhard and Brehmer, Ludwig and Saja, Jose-Antonio de}, title = {Stabilisation of fatty acid mono- and multilayers by simultaneous polyelectrolyte complexation and salt formation with cadmium ions}, year = {1997}, abstract = {The complexation of highly ordered fatty acid monolayers with polyelectrolytes is expected to yield well- ordered Langmuir films suitable for the formation of Langmuir-Blodgett multilayers with improved long-term stability. Studies of the surface pressure-area isotherms and of the surface potential kinetics yield detailed information regarding the influence of these polymeric counterions on the monolayer properties. The injection of bivalent metal salts into the subphase after the complexation was used to improve the order and stability of the mono- and multilayers. The corresponding Langmuir-Blodgett films were investigated by means of X-ray reflectivity measurements and scanning force microscopy. The polyion complex multilayers show a strongly increased mechanical stability compared with films of fatty acid salts formed with bivalent metal ions. These structures are expected to be suitable as ultrathin separation layer for gas separation or ultrafiltration membranes.}, language = {en} } @article{GoldmannDietelJanietzetal.1998, author = {Goldmann, Daniela and Dietel, Reinhard and Janietz, Dietmar and Schmidt, C. and Wendorff, Joachim Heinz}, title = {Sheet-shaped mesogens based on 1,3,5-Triazines : variation of columnar mesophases through intermolecular hydrogen bonding}, year = {1998}, language = {en} } @article{FruebingWegenerGerhardetal.1999, author = {Fr{\"u}bing, Peter and Wegener, Michael and Gerhard, Reimund and Buchsteiner, Alexandra and Neumann, Werner and Brehmer, Ludwig and Dietel, Reinhard}, title = {Pyroelectric properties and dielectric hysteresis of a poly(vinylalcohol) with azobenzene alkoxy side chains}, year = {1999}, language = {en} }