@article{KumkeEidnerKrueger2005,
  author    = {Kumke, Michael Uwe and Eidner, Sascha and Kr{\"u}ger, Tobias},
  title     = {Fluorescence quenching and luminescence sensitization in complexes of Tb3+ and Eu3+ with humic substances},
  year      = {2005},
  abstract  = {Intrinsic fluorescence quenching of humic substances (HS) and the sensitization of Ln(3+) luminescence (Ln3+ Tb3+, Eu3+) in HS complexes were investigated. Both measurements yielded complementary information on the complexation of metals by HS. Large differences between fulvic acids(FA)and humic acids (HA) were found. From time-resolved luminescence measurements it is concluded that a combination of energy transfer and energy back transfer between HS and Ln(3+) is responsible for the observed luminescence decay characteristics. In the case of Eu3+, an additional participation of charge-transfer states is suggested. A new concept for the evaluation of the sensitized luminescence decays of Ln(3+) was adapted},
  language  = {en}
}
@phdthesis{Duan2005,
  author    = {Duan, Hongwei},
  title     = {Functional Nanoparticles as Self-Assembling Building Block and Synthetic Templates},
  address   = {Potsdam},
  pages     = {III, 107 S. : Ill., graph. Darst.},
  year      = {2005},
  language  = {en}
}
@phdthesis{Recih2005,
  author    = {Recih, Oliver},
  title     = {Photonendichtewellenspektroskopie mit intensit{\"a}tsmodulierten Diodenlasern},
  address   = {Potsdam},
  pages     = {iii, 163 S. : graph. Darst.},
  year      = {2005},
  language  = {de}
}
@phdthesis{Asfaw2005,
  author    = {Asfaw, Mesfin},
  title     = {Adhesion of multi-component membbranes and strings},
  address   = {Potsdam},
  pages     = {102 S. : graph. Darst.},
  year      = {2005},
  language  = {en}
}
@phdthesis{Delajon2005,
  author    = {Delajon, Christophe Bernard},
  title     = {Wechselwirkung von Lipidmembranen mit Polyelektrolytmultischichten},
  address   = {Potsdam},
  pages     = {99 S. : graph. Darst.},
  year      = {2005},
  language  = {de}
}
@article{ApitzBellDamgaardetal.2005,
  author    = {Apitz, Sabine E. and Bell, Elanor M. and Damgaard, Lars and Gilbert, Franck and Glud, R and Hall, P. O. J. and Kershaw, P. J. and Nickel, L and Parker, R and Rabouille, Christophe and Shimmield, Grahamm and Solan, Martin and Soltwedel, Thomas and Spagnoli, Federico and Witte, Ursula},
  title     = {Coastal Ocean Benthic Observatories (COBO) : integrated tools for the in situ observation and study of benthic ecosystem biogeochemical processes},
  year      = {2005},
  language  = {en}
}
@article{MallwitzLaschewsky2005,
  author    = {Mallwitz, Frank and Laschewsky, Andr{\´e}},
  title     = {Direct access to stable, freestanding polymer membranes by layer-by-layer assembly of polyelectrolytes},
  issn      = {0935-9648},
  year      = {2005},
  abstract  = {A novel method to prepare ultrathin, freestanding polyelectrolyte films in pores, without the need of sacrificial precursor coatings, has been developed (see Figure). The freestanding films are stable under ambient conditions and suited for additional electrostatic self-assembly or surface modification. They can be specifically decomposed, whereas after thermal crosslinking, resistant films are obtained},
  language  = {en}
}
@article{KhattariRuschelWenetal.2005,
  author    = {Khattari, Z. and Ruschel, Y. and Wen, H. Z. and Fischer, Anna and Fischer, T. M.},
  title     = {Compactification of a myelin mimetic Langmuir monolayer upon adsorption and unfolding of myelin basic protein},
  issn      = {1520-6106},
  year      = {2005},
  abstract  = {The surface shear viscosity of a myelin mimetic Langmuir monolayer is investigated upon adsorption of myelin basic protein (MBP). We measure an increase of the surface shear viscosity at picomolar concentrations of the protein, suggesting that the globular conformation of MBP changes upon adsorption at the monolayer. The conformational change enables hydrodynamic interactions of the proteins, with a typical separation of hundreds of nanometers. This unfolding is essential for the compactification of the myelin sheath, serving an enhanced saltatory signal transduction in vertebrates. The viscometry used extends the sensitivity of standard surface viscometers toward lower viscosities},
  language  = {en}
}
@article{KimSchildeLinker2005,
  author    = {Kim, Boo Geun and Schilde, Uwe and Linker, Torsten},
  title     = {New radical approaches to 3-deoxy-D-oct-2-ulosonic acids (KDO)},
  issn      = {0039-7881},
  year      = {2005},
  abstract  = {Two different approaches. with an unsaturated carbohydrate as a radical acceptor and a carbohydrate derived aldehyde as a radical precursor, led to key intermediates in the synthesis of 3-deoxy-D-oct-2-ulosonic acids (KDO). Manganese(III) acetate and cerium(IV) ammonium nitrate were the reagents of choice for the oxidative generation of radicals, whereas samarium(II) iodide was employed for reductive couplings. Both strategies were realized by using easily available starting materials, with acetic acid as C-2 and ethyl acrylate as C-3 building blocks, respectively},
  language  = {en}
}
@article{HegewaldSchmidtGohsetal.2005,
  author    = {Hegewald, J. and Schmidt, T. and Gohs, U. and Gunther, M. and Reichelt, R. and Stiller, Burkhard and Arndt, K. F.},
  title     = {Electron beam irradiation of poly(vinyl methyl ether) films : 1. Synthesis and film topography},
  issn      = {0743-7463},
  year      = {2005},
  abstract  = {Temperature-sensitive hydrogel layers on silicon (Si) substrates were synthesized by electron beam irradiation of spin-coated poly(vinyl methyl ether) (PVME) films. The influences of the used solvent, the polymer concentration, and the spinning velocity on the homogeneity and the thickness of the PVME film were investigated. In the range of concentration c(p) = 1-15 wt\% PVME in ethanol solution, homogeneous films with a thickness between d = 50 nm and 1.7 mu m were obtained. The films were cross-linked by electron beam irradiation under inert atmosphere and analyzed by sol-gel- analysis. The results were compared with bulkgels formed by electron beam irradiation of PVME in the dry state. The film topography was analyzed by high-resolution field emission scanning electron microscopy and atomic force microscopy. An islandlike structure in the dry, swollen, and shrunken state of the hydrogel films was observed},
  language  = {en}
}
@article{StrehmelSarkerLahtietal.2005,
  author    = {Strehmel, Veronika and Sarker, A. M. and Lahti, P. M. and Karasz, F. E. and Heydenreich, Matthias and Wetzel, Hendrik and Haebel, Sophie and Strehmel, Bernd},
  title     = {One- and two-photon photochemistry and photophysics of poly(arylenevinylene)s containing a biphenyl moiety},
  issn      = {1439-4235},
  year      = {2005},
  abstract  = {Photochemical and photophysical properties were investigated for poly(arylenevinylene)s containing a flexible biphenyl "hinge" unit by applying one-photon (OP) and two-photon (TP) excitation to explore excited-state properties. The poly(arylenevinylene)s were poly[(2,5-dihexyloxy-p-phenylenevinylene)-alt-(4,4'-dihexyloxy-3,3'-biph enylenevinylene)] (1), poly[(2,5-dihexyloxy-p-phenylenevinylene)-alt-(2,2'-dihexyloxy-3,3'-biph enylenevinylene)] (2), and poly[(2,5-dihexyloxy-p-phenylenevinylene)-alt-(2,2'-biphenylene-vinylene )] (3). Effective emission quantum yields and related photonic properties were evaluated on a realistic per-chromophore basis using effective conjugation lengths based on the Strickler-Berg relationship. intramolecular photocyclization was deduced to occur in the one case where the biphenyl molecular connectivity permitted the reaction, based on matrix- assisted loser desorption/ionization time-of-flight (MALDI-TOF), heteronuclear multiple-quantum coherence (HMQC)-NMR, and gel-permeation chromatography (GPC) results. The various photoprocesses could be induced by either OP or TP excitation, though the first excited singlet state is the photoactive state. The higher excitation energy 1 of the TP excited state favors indirect population of the S, state by electronic coupling between the TP and OP excited states [lambda(max)(TPE) (nm): 726; delta (GM)([9]): 1 = 229, 2 = 215, 3 = 109). Photochemical processes occurring from the lowest OP excited state (S-1) could therefore also be indirectly induced by TP excitation},
  language  = {en}
}
@article{SzczubialkaMoczekGoliszeketal.2005,
  author    = {Szczubialka, K. and Moczek, Lukasz and Goliszek, A. and Nowakowska, M. and Kotzev, Anton and Laschewsky, Andr{\´e}},
  title     = {Characterization of hydrocarbon and fluorocarbon microdomains formed in aqueous solution of associative polymers : a molecular probe technique},
  issn      = {0022-1139},
  year      = {2005},
  abstract  = {Fluorocarbon associative polymers of the polysoap type were studied using two fluorescent probes, 1- octanoylpyrene (OcPyH) and 1-perfluorooctanoylpyrene (OcPyF). In aqueous solution the polymers formed hydrophobic domains composed of hydrocarbon, fluorocarbon or both types of polymeric side chains, which could solubilize the probes. This resulted in the appearance of new fluorescence emission bands and changes in the fluorescence polarization of the probes. The differences in the solubilization properties of the polymers are discussed. (c) 2005 Elsevier B.V. All rights reserved},
  language  = {en}
}
@article{SchulerLipmanSteinbachetal.2005,
  author    = {Schuler, Benjamin and Lipman, Everett A. and Steinbach, P. J. and Kumke, Michael Uwe and Eaton, W. A.},
  title     = {Polyproline and the "spectroscopic ruler" revisited with single-molecule fluorescence},
  issn      = {0027-8424},
  year      = {2005},
  abstract  = {To determine whether Forster resonance energy transfer (FRET) measurements can provide quantitative distance information in single-molecule fluorescence experiments on polypeptides, we measured FRET efficiency distributions for donor and acceptor dyes attached to the ends of freely diffusing polyproline molecules of various lengths. The observed mean FRET efficiencies agree with those determined from ensemble lifetime measurements but differ considerably from the values expected from Forster theory, with polyproline treated as a rigid rod. At donor-acceptor distances much less than the Forster radius R-o, the observed efficiencies are lower than predicted, whereas at distances comparable to and greater than R-0, they are much higher. Two possible contributions to the former are incomplete orientational averaging during the donor lifetime and, because of the large size of the dyes, breakdown of the point-dipole approximation assumed in Forster theory. End-to-end distance distributions and correlation times obtained from Langevin molecular dynamics simulations suggest that the differences for the longer polyproline peptides can be explained by chain bending, which considerably shortens the donor-acceptor distances},
  language  = {en}
}
@article{SieboldKellingSchildeetal.2005,
  author    = {Siebold, M. and Kelling, Alexandra and Schilde, Uwe and Strauch, Peter},
  title     = {Heterobimetallic 3d-4-complexes with bis(1;2-dithiooxalato)nickelate(II) as planar bridging block},
  issn      = {0932-0776},
  year      = {2005},
  abstract  = {Planar bis(1,2-dithiooxalato)nickelates(II) react in aqueous solutions of lanthanide ions to form pentanuclear, heterobimetallic complexes of the general composition [{Ln(H2O)(n)}(2)- {Ni(dto)(2)}(3)] (.) xH(2)O (Ln = Y3+, La3+, Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Gd3+, Tb3+, Dy3+, Ho3+, Er3+, Tm3+, Yb3+, Lu3+; n = 4 or 5; x = 9-12). With [{Nd(H2O)(5)}(2){Ni(S2C2O2)(2)}(3)] (.) xH(2)O (x = 10-12) (1) and [{Er(H2O)(4)}(2){Ni(S2C2O2)(2)}(3)] (.) xH(2)O (x = 9- 10) (2) we were able to isolate two complexes of this series as single crystals, which were characterized by X-ray structure analysis. Depending on the individual ionic radii of the lanthanide ions, the compounds crystallize in two different crystal systems with the following unit cell parameters: 1, monoclinic in P2(1)/c with a = 11.3987(13), b = 11.4878(8), c = 20.823(2)angstrom , beta = 98.907(9)degrees and Z = 2; 2, triclinic in P (1) over bar with a = 10.5091(6), b = 11.0604(6), c = 11.2823(6) angstrom, alpha = 107.899(4)degrees, beta = 91.436(4)degrees, gamma = 112.918(4)degrees and Z = 1. The channels and cavities appearing in the packing of the molecules are occupied by uncoordinated water molecules. High magnetic moments up to 14.65 BM./f.u. have been observed at room temperature due to the combined moments of the individual lanthanide ions},
  language  = {en}
}
@article{RitschelKuntzZulicke2005,
  author    = {Ritschel, Thomas and Kuntz, Philip J. and Zulicke, Lutz},
  title     = {Structure and dynamics of cationic van-der-Waals clusters : I. Binding and structure of protonated argon clusters},
  year      = {2005},
  abstract  = {The geometric structure and bonding properties of medium-sized ArnH+ clusters (n = 2-35), in which a proton is wrapped up in a number of Ar atoms, are investigated by applying a diatomics-in-molecules (DIM) model with ab-initio input data generated by means of multi-reference configuration-interaction (MRCI) computations. For the smaller complexes, n = 2-7, cross-checking calculations employing the coupled-cluster approach (CCSD) with the same one-electron atomic basis set as for the input data calculations (aug-cc-pVTZ from Dunning), show good agreement thus justifying the extension of the DIM study to larger n. Local minima of the multi-dimensional potential-energy surfaces (PES) are determined by combining a Monte-Carlo sampling followed, for each generated point, by a steepest-descent optimization procedure. For the electronic ground state of the ArnH+ clusters, the global minimum (corresponding to the most stable structure of the cluster) as well as secondary minima are found and analyzed. The structural and energetic data obtained reveal the building-up regularities for the most stable structures and make it possible to formulate a simple increment scheme. The low-lying excited states are also calculated by the DIM approach; they all turn out to be globally repulsive},
  language  = {en}
}
@article{PetersPetersKimetal.2005,
  author    = {Peters, Karl and Peters, E. M. and Kim, Boo Geun and Linker, Torsten},
  title     = {Crystal structure of ethyl (3aR,4R,5R,6R,7aR)-4,5-diacetoxy-6-acetoxymethyl-2-oxy-3a,5,6,7a-tetrahy dro-4H- pyrano[3,2-d]isoxazole-3-carboxylate, C16H21NO11},
  issn      = {1433-7266},
  year      = {2005},
  abstract  = {C16H21NO11, monoclinic, P12(1)1 (no. 4), a = 8.181(1) angstrom, b = 11.604(2) angstrom, c = 10.193(1) angstrom, beta = 101.59(1)degrees, V = 947.9 angstrom(3), Z = 2, R-gt(F) = 0.068, wR(ref)(F-2) = 0.177, T = 293 K.},
  language  = {en}
}
@article{PetersPetersLinkeretal.2005,
  author    = {Peters, Karl and Peters, E. M. and Linker, Ursula and Linker, Torsten},
  title     = {Crystal structure of 1,1,2,2-tetramethoxycarbonylethanol, C2H(CH3OCO)(4)OH},
  issn      = {1433-7266},
  year      = {2005},
  abstract  = {C10H14O9, monoclinic, C12/c1 (no. 15), a = 15.801(1) angstrom, b = 7.920(1) angstrom, c = 21.055(2) angstrom, beta = 101.31 (1)degrees, V = 2583.8 angstrom(3), Z = 8, R-gt(F) 0.044, wR(ref)(F-2) = 0.134, T = 293 K.},
  language  = {en}
}
@article{PetersPetersRebienetal.2005,
  author    = {Peters, Karl and Peters, E. M. and Rebien, F. and Linker, Torsten},
  title     = {Crystal structure of methyl (1R,2S,3R,4S)-1-phenyl-3,4-epoxi-1,2,3,4-tetrahydronaphthalene-2-carboxy late,C18H16O3},
  issn      = {1433-7266},
  year      = {2005},
  abstract  = {C18H16O3, monoclinic, P12(1)/c1 (no. 14), a = 14.954(3) angstrom, b = 8.088(2) angstrom, c = 11.973(2) angstrom, beta = 93.50(1)degrees, V = 1445.4 angstrom(3), Z = 4, R-gt(F) = 0.083, wR(ref)(F-2) = 0.249, T = 293 K.},
  language  = {en}
}
@article{RancanWieheNoebeletal.2005,
  author    = {Rancan, Fiorenza and Wiehe, Arno and N{\"o}bel, Maria and Senge, Mathias O and Al Omari, Saleh and B{\"o}hm, Fritz and John, Matthias and R{\"o}der, Beate},
  title     = {Influence of substitutions on asymmetric dihydroxychlorins with regard to intracellular uptake, subcellular localization and photosensitization of Jurkat cells},
  issn      = {1011-1344},
  year      = {2005},
  abstract  = {The search for new efficient sensitizers for photodynamic therapy (PDT) points to improve photophysical properties like absorption in the red region and singlet oxygen quantum yield as well as to control the localization of the sensitizer within the tumour cell. Depending on their physicochemical properties and their uptake mechanism, sensitizers can reach different intracellular concentrations and localize in different subcellular compartments. Moreover, the preferential localization of a sensitizer in target organelles, like mitochondria or lysosomes, could determine the cell death mechanism after PDT. This study aimed to investigate the influence of substitutions on dihydroxychlorins with regard to intracellular uptake, subcellular localization and cell death pathway. Moreover, the effect of a liposome-based delivery system was tested. The intracellular uptake was found to be strictly dependent on the sensitizer molecular structure and the means of its delivery. The most polar sensitizer in this study (compound 3) had, depending on incubation time, an intracellular concentration 2-8 times higher than the unsubstituted chlorin 1. All investigated photosensitizers localize predominantly in lysosomes but after longer incubation times weak fluorescence intensity was also detected in mitochondria and Golgi apparatus. The cell death pathway was found to be influenced by the sensitizer intracellular concentration and the applied light doses. In general, the increasing amphiphilicity of the sensitizer molecules is correlated with an increased sensitizer uptake and an increased rate of necrotic cells after irradiation. (C) 2004 Elsevier B.V. All rights reserved},
  language  = {en}
}
@article{PeikowMaternPeteretal.2005,
  author    = {Peikow, Dirk and Matern, Christa-Maria and Peter, Martin G. and Schilde, Uwe},
  title     = {Crystal structure of (1,4,7,10,13-pentaoxacyclopentadecane-O,O ',O '',O ''')(trifluoromethanesulfonato-O,O ')sodium, Na(C10H20O5)(CF3SO3)},
  year      = {2005},
  abstract  = {C11H20F3NaO8S, monoclinic, P121/nil (no. 11), a = 7.947(1) angstrom, b = 12.056(1) angstrom, c = 9.083(1) angstrom, P = 106.01 (1)degrees, V = 836.4 angstrom(3), Z = 2, R-gt(F) = 0.043, wR(ref)(F-2) = 0.120, T = 210 K.},
  language  = {en}
}