@book{KoetzKosmella2007, author = {Koetz, Joachim and Kosmella, Sabine}, title = {Polyelectrolytes and nanoparticles}, series = {Springer laboratory manuals in polymer science}, journal = {Springer laboratory manuals in polymer science}, publisher = {Springer-Verlag}, address = {Heidelberg}, isbn = {3-540-46381-X}, pages = {105 S.}, year = {2007}, language = {en} } @phdthesis{Krause2007, author = {Krause, Pascal}, title = {Many-electron dynamics in molecules by means of time-dependent configuration interaction methods}, address = {Potsdam}, pages = {III, 107 S. : graph. Darst.}, year = {2007}, language = {en} } @phdthesis{Frankovitch2007, author = {Frankovitch, Christine Marie}, title = {Optical methods for monitoring biological parameters of phototropic microorganisms during cultivation}, address = {Potsdam}, pages = {iii, 95 S. : graph. Darst.}, year = {2007}, language = {en} } @phdthesis{Sel2007, author = {Sel, {\"O}zlem}, title = {Hierarchical meso- and macropore architectures by liquid crystalline and polymer colloid templating}, address = {Potsdam}, pages = {105, VXI S. : graph. Darst.}, year = {2007}, language = {en} } @phdthesis{You2007, author = {You, Liangchen}, title = {Synthesis and characterization of novel glycopolymers}, address = {Potsdam}, pages = {116 S. : graph. Darst.}, year = {2007}, language = {en} } @phdthesis{Stocco2007, author = {Stocco, Antonio}, title = {Amphiphilic block copolymers at the liquid-fluid interface, invesrigated by evanescent light scattering and ellipsometry}, address = {Potsdam}, pages = {iii, 108 S. : Ill., graph. Darst.}, year = {2007}, language = {en} } @phdthesis{EntrialgoCastano2007, author = {Entrialgo Castano, Maria}, title = {Hydrolytic degradation of aliphatic polyester: molecular modeling and quantum mechanical investigations}, address = {Potsdam}, pages = {141 S. : graph. Darst.}, year = {2007}, language = {en} } @phdthesis{Kulkarni2007, author = {Kulkarni, Amit Narahari}, title = {Degradation kinetics studies of polymers for biomedical applications}, address = {Potsdam}, pages = {vi, 144, viii S. : graph. Darst.}, year = {2007}, language = {en} } @phdthesis{Kaper2007, author = {Kaper, Helenea}, title = {Structure control of nanoscaled inorganic matter by ionic liquids}, address = {Potsdam}, pages = {138 S. : Ill., graph. Darst.}, year = {2007}, language = {en} } @phdthesis{Alahverdjieva2007, author = {Alahverdjieva, Veneta}, title = {Experimental study of mixed protein/surfactant systems at the aqueous solution/air interface}, address = {Potsdam}, pages = {XIV, 146 S., X : graph. Darst.}, year = {2007}, language = {en} } @phdthesis{Nest2007, author = {Nest, Mathias}, title = {Quantum dynamics for large systems: System-bath type situations and correlated dynamics of many electrons}, address = {Potsdam}, pages = {176 S., I-V, graph. Darst.}, year = {2007}, language = {en} } @article{LaschewskyPoundSkrabaniaetal.2007, author = {Laschewsky, Andr{\´e} and Pound, Gwenaelle and Skrabania, Katja and Holdt, Hans-Joachim and Teller, Joachim}, title = {Unsymmetrical bifunctional trithiocarbonate as unexpected by-product in the synthesis of a dithioester RAFT agent}, issn = {0303-402X}, doi = {10.1007/s.00396-007-1653-5}, year = {2007}, abstract = {The trithiocarbonate 2-(benzylsulfanylthiocarbonylsulfanyl) propanoic acid is formed as minor by-product in the synthesis of the dithioester 2-((2-phenylthioacetyl)sulfanyl) propanoic acid via the Grignard route. The mechanism for this side reaction is not clear. The isolated trithiocarbonate may act as unsymmetrical but bifunctional RAFT agent in the aqueous polymerization of N,N-dimethyl acrylamide. Therefore, it is important to separate it completely from the dithioester before engaging the latter in controlled free radical polymerization to guarantee a maximum control.}, language = {en} } @article{ParkinsonAharonChangetal.2007, author = {Parkinson, P. and Aharon, E. and Chang, M. H. and Dosche, Carsten and Frey, G. L. and K{\"o}hler, Anna and Herz, L. M.}, title = {Dimensionality-dependent energy transfer in polymer-intercalated SnS2 nanocomposites}, doi = {10.1103/Physrevb.75.165206}, year = {2007}, abstract = {We have investigated the influence of dimensionality on the excitation-transfer dynamics in a conjugated polymer blend. Using time-resolved photoluminescence spectroscopy, we have measured the transfer transients for both a three-dimensional blend film and for quasi-two-dimensional monolayers formed through intercalation of the polymer blend between the crystal planes of an inorganic SnS2 matrix. We compare the experimental data with a simple, dimensionality- dependent model based on electronic coupling between electronic transition moments taken to be point dipoles. Within this approximation, the energy-transfer dynamics is found to adopt a three-dimensional character in the solid film and a two-dimensional nature in the monolayers present in the SnS2-polymer nanocomposite.}, language = {en} } @article{DoscheMicklerLoehmannsroebenetal.2007, author = {Dosche, Carsten and Mickler, Wulfhard and L{\"o}hmannsr{\"o}ben, Hans-Gerd and Agenet, Nicolas and Vollhardt, K. Peter C.}, title = {Photoinduced electron transfer in [N]phenylenes}, issn = {1010-6030}, doi = {10.1016/j.jphotochem.2006.12.038}, year = {2007}, abstract = {First studies of electron transfer in [N]phenylenes were performed in bimolecular quenching reactions of angular [3]- and triangular [4]phenylene with various electron acceptors. The relation between the quenching rate constants k(q) and the free energy change of the electron transfer (Delta G(CS)(0)) could be described by the Rehm- Weller equation. From the experimental results, a reorganization energy lambda of 0.7 eV was derived. Intramolecular electron transfer reactions were studied in an [N]phenylene bichomophore and a corresponding reference compound. Fluorescence lifetime and quantum yield of the bichromophor display a characteristic dependence on the solvent polarity, whereas the corresponding values of the reference compound remain constant. From the results, a nearly isoenergonic charge separation process can be determined. As the triplet quantum yield is nearly independent of the polarity, charge recombination leads to the population of the triplet state.}, language = {en} } @article{RudershausenDrexlerBansseetal.2007, author = {Rudershausen, S. and Drexler, Hans-Joachim and Banße, Wolfgang and Kelling, Alexandra and Schilde, Uwe and Holdt, Hans-Joachim}, title = {Three polymorphs of bis(5-methylthio-1,2-dithiole-3-thione)-disulfide}, doi = {10.1002/crat.200610776}, year = {2007}, abstract = {The title compound, bis(5-methylthio-1,2-dithiole-3-thione)-disulfide, was yielded for the first time as by- product of the reaction of nickel(II) and cobalt(II) ions with 5-methylthio-1,2-dithiole-3-thione-4-thiolate. The compound can be obtained directly by oxidation of the ammonium salt of the ligand. C8H6S10 forms three polymorphs: (I), which crystallizes in the orthorhombic space group P212121, (II) and (III), which crystallize in the monoclinic space groups P21/c and P21/n, respectively. The crystal and molecular structures are presented here. The determination of the absolute configuration of (I) indicated the P-helical enantiomer. In contrast to this, the crystals of (II) und (III) are racemic, containing P- and M-helical enantiomers. The polymorphs differ in the kind of skewing around the disulfide bond and of the positions of the both dithiole rings to the S-S-moiety}, language = {en} } @article{HaebelBahrkePeter2007, author = {Haebel, Sophie and Bahrke, Sven and Peter, Martin G.}, title = {Quantitative sequencing of complex mixtures of heterochitooligosaccharides by vMALDI-linear ion trap mass spectrometry}, issn = {0003-2700}, doi = {10.1021/Ac062254u}, year = {2007}, abstract = {Heterochitooligosaccharides possess interesting biol. properties. Isobaric mixts. of such linear heterochitooligosaccharides can be obtained by chem. or enzymic degrdn. of chitosan. However, the sepn. of such mixts. is a challenging anal. problem which is so far unresolved. It is shown that these isobaric mixts. can be sequenced and quantified simultaneously using std. derivatization and multistage tandem mass spectrometric techniques. A linear ion trap mass spectrometer equipped with a vacuum matrix-assisted laser desorption ionization (vMALDI) source is used to perform MS2 as well as MS3 expts. [on SciFinder (R)].}, language = {en} } @article{SchwarzeMuellerDoscheetal.2007, author = {Schwarze, Thomas and Mueller, Holger and Dosche, Carsten and Klamroth, Tillmann and Mickler, Wulfhard and Kelling, Alexandra}, title = {Luminescence detection of open-shell transition-metal ions by photoinduced electron transfer controlled by internal charge transfer of a receptor}, doi = {10.1002/anie.200603992}, year = {2007}, language = {en} } @article{ShainyanUshakovMeshcheryakovetal.2007, author = {Shainyan, Bagrat A. and Ushakov, Igor A. and Meshcheryakov, Vladimir I. and Schilde, Uwe and Koch, Andreas and Kleinpeter, Erich}, title = {The stereodynamics of 3,5-bis(trifluoromethylsulfonyl)-1,3,5-oxadiazinane and 1,3,5- tris(trifluoromethylsulfonyl)-1,3,5-triazinane- an experimental and theoretical study}, doi = {10.1016/j.tet.2007.09.041}, year = {2007}, abstract = {Multinuclear dynamic NMR spectroscopy of 3,5-bis(trifluoromethylsulfonyl)-1,3,5-oxadiazinane (3) revealed the existence of two conformers with differently oriented CF3 groups with respect to the ring, and two dynamic processes: ring inversion and restricted rotation about the N-S bond. Two transition states connecting the two conformers and corresponding to clockwise and counterclockwise rotations about the N-S bond were found; the calculated activation barriers of about 12 kcal/mol are in excellent agreement with those measured experimentally for the related molecule 1,3,5-tris(trifluoromethylsulfonyl)-1,3,5-triazinane (1). X-ray analysis proved the existence of the symmetric isomer of 3, which is the minor isomer in solutions but the only one in the crystal due to packing effects. The normal Perlin effect (JCHax < JCHeq)observed for 2(6)-CH2 in 3, whereas the reversed Perlin effect was found for the 4-CH2 group in 3 as well as for all CH2 groups in 1 both experimentally and theoretically. The latter effect in compounds 1, 3, and 1- (methylsulfonyl)-3,5-bis(trifluoromethylsulfonyl)-1,3,5-triazinane (2) can be considered as a genuine reverse Perlin effect since larger values of 1JCH are observed for longer C-H bonds.}, language = {en} } @article{RasovicSteelKleinpeteretal.2007, author = {Rasovic, Aleksandar and Steel, Peter J. and Kleinpeter, Erich and Markovic, Rade}, title = {Regioselective synthesis of 1,3-thiazines by sequential 4-oxothiazolidine to 1,2-dithiole to 1,3-thiazine transformations : role of intramolecular non-bonded S...O interactions}, doi = {10.1016/j.tet.2006.12.075}, year = {2007}, abstract = {A new synthetic approach to 2,3-dihydro-4H-1,3-thiazine derivatives based upon reductive rearrangement of 1,2- dithiole-3-ylidene thiones has been developed. In turn, the 1,2-dithiole derivatives were prepared by an efficient ring- opening-closing process of 2-alkylidene-4-oxothiazolidines, induced in the presence of Lawesson's reagent by intramolecular non-bonded 1,5-type S...O interactions in the 4-oxothiazolidine precursors.}, language = {en} } @article{WackerKleinpeter2007, author = {Wacker, Philipp and Kleinpeter, Erich}, title = {Stoichiometry, complex stability, molecular size and conformational variations of metal ion crown ether complexes subject to diffusion coefficients in nonaqueous solutions}, doi = {10.1007/s10847-007-9332-1}, year = {2007}, abstract = {Both the stoichiometry and complex stability constants of crown ether complexes with metal ions have been determined by examining gradual changes in their diffusional behavior in nonaqueous solution. Diffusion coefficients, D, were evaluated by pulsed field gradient (PFG) NMR titration experiments whilst complex stability constants were determined by nonlinear curve-fitting procedures, D versus csol., which also allow the treatment of multiple complexation equilibria (1:1 to 1:2 stoichiometries). Differences in the diffusion coefficients of the various free crown ethers with respect to their metal ion complexes indicate great sensitivity to both conformational changes and changes in molecular size upon complexation.}, language = {en} }