@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}
}
@article{HildebrandtCharbonniereBecketal.2005,
  author    = {Hildebrandt, Niko and Charbonniere, Lo{\"i}c J. and Beck, Michael and Ziessel, Raymond F. and L{\"o}hmannsr{\"o}ben, Hans-Gerd},
  title     = {Quantum dots as efficient energy acceptors in a time-resolved fluoroimmunoassay},
  issn      = {1433-7851},
  year      = {2005},
  language  = {en}
}
@article{Loehmannsroeben2005,
  author    = {L{\"o}hmannsr{\"o}ben, Hans-Gerd},
  title     = {Laser-induced fluorescence (LIF) spectroscopy and laser-based ion mobility (IM) spectrometry for in-situ analysis of contaminated soils},
  year      = {2005},
  language  = {en}
}
@phdthesis{Polleux2005,
  author    = {Polleux, Julien Philippe},
  title     = {Ligang-Mediated synthesis and assembly of crystalline metal oxide nanoparticles},
  address   = {Potsdam},
  pages     = {118 S. : Ill., graph. Darst.},
  year      = {2005},
  language  = {en}
}
@article{LeporattiSczechRiegleretal.2005,
  author    = {Leporatti, S. and Sczech, R. and Riegler, H. and Bruzzano, Stefano and Storsberg, J. and Loth, Fritz and Jaeger, Werner and Laschewsky, Andr{\´e} and Eichhorn, S. and Donath, E.},
  title     = {Interaction forces between cellulose microspheres and ultrathin cellulose films monitored by colloidal probe microscopy : effect of wet strength agents},
  year      = {2005},
  language  = {en}
}
@phdthesis{Ali2005,
  author    = {Ali, Abu Md. Imroz},
  title     = {Morphology control in nanoscopic composite polymer particles},
  address   = {Potsdam},
  pages     = {97, XXXV S. : Ill., graph. Darst.},
  year      = {2005},
  language  = {en}
}
@article{AlarconAldereteAguilaetal.2005,
  author    = {Alarcon, Julio and Alderete, Joel B. and Aguila, Sergio and Peter, Martin G.},
  title     = {Regio and stereoselective hydroxylation of alpha-agarofuran by biotransformation of rhizopus nigricans},
  year      = {2005},
  abstract  = {A new synthesis of 9 alpha-hydroxy-alpha-agarofuran (6 alpha) is described, using a microbiological hydroxylation alpha-agarofuran (5) as the key reaction. The stereochemistry of the biohydroxylation was determined on the basis of a NOESY-experiment and GIAO calculations at the B3LYP/cc-pVDZ level. A strong gamma-effect was observed at C15 of the agarofuran ring which was correctly predicted by the GIAO-B3LYP calculations},
  language  = {en}
}
@article{KozlevcarHumarStrauchetal.2005,
  author    = {Kozlevcar, Bojan and Humar, M. B. and Strauch, Peter and Leban, I},
  title     = {Fixation of copper(II) ions in aqueous solution to lignin model compound vanillin in an absence of the nitrogen donor ligands : structural and EPR correlation},
  year      = {2005},
  abstract  = {In order to elucidate the interactions of copper with wood, three mononuclear copper(II) coordination compounds with a vanillinate anion, cis-[Cu(C8H7O3)(2)(H2O)(2)] (1), trans-[Cu(C8H7O3)(2)(H2O)(2)].2H(2)O (2), and trans- [Cu(C8H7O3)(2)(H2O)(2)] (3), have been characterized. X-ray structure analysis of the cis isomer 1 reveals two bidentate vanillinate ions coordinated via methoxy (Cu-O1 2.260(2) angstrom) and deprotonated hydroxy oxygen atoms (Cu-O2 1.909(2) angstrom), and two water molecules (Cu-O1w 2.087(2) angstrom) in the octahedral CuO6 chromophore. Two axes O1-Cu- O1w' in the octahedron have the same length, while the third axis O2-Cu-O2' is shorter. This is in agreement with the room temperature EPR spectrum of 1, showing two signals (g(12) 2.302, g(3) 2.005), but interestingly, three signals (g(1) 2.393, g(2) 2.214, g(3) 2.010) in the 115 K spectrum were found. The same coordination atoms were found also in the trans isomer 2 (Cu-O2 1.950(2), Cu-O1w 1.994(2), Cu-O1 2.334(2) angstrom), however here, two axes of almost equal length are short (O2-Cu-O2' O1w-Cu-O1w'), while the third axis is longer (O1-Cu-O1'). On the other hand, three (rhombic) signals (g(1) 2.289, g(2) 2.163, g(3) 2.086) in the room temperature EPR spectrum of 2 suggest three different axes in the coordination octahedron. In the EPR spectrum, of the second trans complex 3, a slightly rhombically distorted elongated axial spectrum is found. The 115 K EPR spectra of the two trans complexes 2 and 3 do not differ significantly from the features observed at room temperature. These results indicate that there is not always a straightforward correlation between the results of XRD structure analysis and EPR spectroscopy. Nevertheless, both methods can act also complementarily and give a deeper insight into the nature of copper(II) chromophores},
  language  = {en}
}
@article{RickertLendleinKelchetal.2005,
  author    = {Rickert, D and Lendlein, Andreas and Kelch, S and Franke, R. P. and Moses, M. A.},
  title     = {Cell proliferation and cellular activity of primary cell cultures of the oral cavity after cell seeding on the surface of a degradable, thermoplastic block copolymer},
  year      = {2005},
  abstract  = {Using standard cell biological and biochemical methods we were able to test the ability of a degradable, thermoplastic block copolymer to support the adhesion, proliferation, and the cellular activity of primary cell cultures of the oral cavity in vitro. The delicate balance between a group of endogenous enzymes, Matrix Metalloproteinases (MMPs), and their inhibitors (Tissue Inhibitor of MMPs, TIMPs) have a decisive function in the remodeling of the extracellular matrix during processes like wound healing or the integration of biomaterials in surrounding tissues after implantation. Recently developed, biodegradable thermoplastic elastomers with shape-memory properties may be the key to develop new therapeutical options in head and neck surgery. Primary cell cultures of the oral cavity of Sprague-Dawley rats were seeded on the surface of a thermoplastic block copolymer and on a polystyrene surface as control. Conditioned media of the primary cells were analyzed for MMPs and TIMPs after different periods of cell growth. The MMP and TIMP expression was analysed by zymography and a radiometric enzyme assay. No statistically significant differences in the appearance and the kinetic of MMP-1, MMP-2, MMP-9 and TIMPs were detected between cells grown on the polymer surface compared to the control. An appropriate understanding of the molecular processes that regulate cellular growth and integration of a biomaterial in surrounding tissue is the requirement for an optimal adaptation of biodegradable, polymeric biomaterials to the physiological, anatomical, and surgical conditions in vivo to develop new therapeutic options in otolaryngology and head and neck surgery},
  language  = {en}
}
@article{LoehmannsroebenLau2005,
  author    = {L{\"o}hmannsr{\"o}ben, Hans-Gerd and Lau, Steffen},
  title     = {Isotope selectivity in environmental monitoring : NIR diode laser spectroscopy for isotope-selective sensing of soil-respired carbon dioxide},
  year      = {2005},
  language  = {en}
}
@article{EngelhardtLinker2005,
  author    = {Engelhardt, Ulrike and Linker, Torsten},
  title     = {1,4-cyclohexadienes as mechanistic probes for the Jacobsen epoxidation : evidence for radical pathways},
  year      = {2005},
  abstract  = {1,4-Cyclohexadienes allow a direct comparison of epoxidation and C - H oxidation within the same molecule and give evidence for radical pathways during the Jacobsen epoxidation},
  language  = {en}
}