TY  - JOUR
A1  - Janietz, Dietmar
A1  - Festag, R.
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
T1  - Amphotropic oligomeric 1,3,5-triazines containing disc-shaped pentaalkyne and triphenylene side groups
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Goldmann, Daniela
A1  - Janietz, Dietmar
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
T1  - Columnar liquid crystalline phases through hydrogen bonding and nanoscale segregation
N2  - Two columnar phases forming 2,4,6-triarylamino-1,3,5-triazines have been investigated in binary mixtures with calamitic and non-liquid crystalline benzoic acids carrying one or two alkoxy chains at the aromatic core. The triazines form hydrogen bonded aggregates with the complementary acids. Each investigated equimolar mixture exhibits a columnar mesophase due to segregation of the H-bonded polar core region from the lipophilic aliphatic molecular segments. The cross sectional shape of cylindrical aggregates and, therefore, the two-dimensional lattice symmetries, hexagonal or rectangular, are defined by the number of alkoxy chains of the benzoic acid component
Y1  - 2004
SN  - 0959-9428
ER  - 
TY  - JOUR
A1  - Goldmann, Daniela
A1  - Janietz, Dietmar
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
T1  - Disc-shaped mesogens based on 1,3,5-triazines : variation and induction of columnar mesophases through complementary intermolecular interactions
Y1  - 1996
ER  - 
TY  - JOUR
A1  - Wilke, Max
A1  - Partzsch, G. M.
A1  - Schmidt, C.
A1  - Farges, Francois
T1  - In-situ study of the iron species in silicate melts
Y1  - 2004
SN  - 0016-7037
ER  - 
TY  - JOUR
A1  - Janietz, Dietmar
A1  - Festag, R.
A1  - Schmidt, C.
A1  - Tsukruk, V. V.
A1  - Wendorff, Joachim Heinz
T1  - Interfacial behaviour and thermal properties of triazine modified triphenylene oligomers
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Goldmann, Daniela
A1  - Janietz, Dietmar
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
T1  - Liquid crystalline 1,3,5-triazines incorporating rod-like azobenzene sub-units
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Goldmann, Daniela
A1  - Mahlstedt, S.
A1  - Janietz, Dietmar
A1  - Busch, P.
A1  - Schmidt, C.
A1  - Stracke, A.
A1  - Wendorff, Joachim Heinz
T1  - Mesomorphic donor-acceptor twin molecules with covalently linked sheet-like pentaalkyne and nitrofluorenone subunits
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Munz, Matthias
A1  - Oswald, Sascha
A1  - Schmidt, C.
T1  - Sand box experiments to evaluate the influence of subsurface temperature probe design on temperature based water flux calculation
JF  - Hydrology and earth system sciences : HESS
N2  - Quantification of subsurface water fluxes based on the one dimensional solution to the heat transport equation depends on the accuracy of measured subsurface temperatures. The influence of temperature probe setup on the accuracy of vertical water flux calculation was systematically evaluated in this experimental study. Four temperature probe setups were installed into a sand box experiment to measure temporal highly resolved vertical temperature profiles under controlled water fluxes in the range of +/- 1.3 md(-1). Pass band filtering provided amplitude differences and phase shifts of the diurnal temperature signal varying with depth depending on water flux. Amplitude ratios of setups directly installed into the saturated sediment significantly varied with sand box hydraulic gradients. Amplitude ratios provided an accurate basis for the analytical calculation of water flow velocities, which matched measured flow velocities. Calculated flow velocities were sensitive to thermal properties of saturated sediment and to temperature sensor spacing, but insensitive to thermal dispersivity equal to solute dispersivity. Amplitude ratios of temperature probe setups indirectly installed into piezometer pipes were influenced by thermal exchange processes within the pipes and significantly varied with water flux direction only. Temperature time lags of small sensor distances of all setups were found to be insensitive to vertical water flux.
Y1  - 2011
U6  - https://doi.org/10.5194/hess-15-3495-2011
SN  - 1027-5606
VL  - 15
IS  - 11
SP  - 3495
EP  - 3510
PB  - Copernicus
CY  - Göttingen
ER  - 
TY  - JOUR
A1  - Janietz, Dietmar
A1  - Festag, R.
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
T1  - Self-organization of new oligomers containing disc-shaped side groups
Y1  - 1994
ER  - 
TY  - JOUR
A1  - Goldmann, Daniela
A1  - Dietel, Reinhard
A1  - Janietz, Dietmar
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
T1  - Sheet-shaped mesogens based on 1,3,5-Triazines : variation of columnar mesophases through intermolecular hydrogen bonding
Y1  - 1998
ER  - 
TY  - JOUR
A1  - Goldmann, Daniela
A1  - Nordsieck, A.
A1  - Janietz, Dietmar
A1  - Frese, T.
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
T1  - Smectic and columnar liquid crystalline phases through charge-transfer interactions
N2  - New heterocyclic electron donors based on. a 1,3,5-triazine nucleus are presented. Three phenyl rings are grafted to the triazine core either via secondary amino groups or by a direct C,C-linkage and a specific number of decyloxy chains is attached to the molecular periphery. The compounds are non-liquid crystalline in their pure states. Lamellar or columnar mesophases are induced by attractive interactions with electron acceptors
Y1  - 2004
SN  - 1058-725X
ER  - 
TY  - JOUR
A1  - Wilke, Max
A1  - Farges, Francois
A1  - Partzsch, G. M.
A1  - Schmidt, C.
A1  - Behrens, Harald
T1  - Speciation of Fe in silicate glasses and melts by in-situ XANES spectroscopy
Y1  - 2007
ER  - 
TY  - JOUR
A1  - Festag, R.
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
A1  - Janietz, Dietmar
T1  - Structure and dynamics of new triazine based polymers with discotic side groups
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Janietz, Dietmar
A1  - Festag, R.
A1  - Schmidt, C.
A1  - Wendorff, Joachim Heinz
T1  - Supramolecular assemblies of new amphotropic oligomers with disc-shaped side groups
Y1  - 1995
ER  - 
TY  - JOUR
A1  - Farges, Francois
A1  - Djanarthany, S
A1  - de Wispelaere, S
A1  - Munoz, Manuel
A1  - Magassouba, B
A1  - Haddi, A
A1  - Wilke, Max
A1  - Schmidt, C.
A1  - Borchert, Manuela
A1  - Trocellier, P
A1  - Crichton, W
A1  - Simionovici, Alexandre
A1  - Petit, Pierre-Emanuel
A1  - Mezouar, Mohamed
A1  - Etcheverry, M. P.
A1  - Pallot-Frossard, I
A1  - Bargar, John Reeder
A1  - Brown, G. E.
A1  - Grolimund, D
A1  - Scheidegger, A
T1  - Water in silicate glasses and melts of environmental interest : from volcanoes to cathedrals
N2  - In silicate glasses and melts, water acts according to two main processes. First, it can be dissolved in high temperature/high pressure melts. Second, it constitutes a weathering agent on the glass surface. A number of in-situ x- ray absorption fine structure (XAFS) studies for Fe, Ni, Zr, Th and U show that the more charged cations (Zr, Nb, Mo, Ta, Sn, Th and U) are little affected by the presence of dissolved water in the melt. In contrast, divalent iron and nickel are highly sensitive to the presence of water, which enhance nucleation processes, for example, of phyllosilicates at the angstrom-scale. Such information provides additional constraints on the role of water deep in the Earth, particularly in magmatology. By contrast, the weathering of glass surfaces by water can be studied from a durability perspective. Experimental weathering experiments Of nuclear waste glasses performed in the laboratory show a variety of surface enrichments (carbon, chlorine, alkalis, iron) after exposure to atmospheric fluids and moisture. Mn-, and Fe-surface enrichments of analogous glasses of the XIVth century are related to the formation of Mn and Fe oxy/ hydroxides on the surface. The impact on the glass darkening is considered in terms of urban pollution and mass tourism
Y1  - 2005
ER  -