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Yang SX, Fan ZY, Zhang FY, Li SH, Wu YX. Functionalized Copolymers of Isobutylene with Vinyl Phenol: Synthesis, Characterization, and Property. CHINESE JOURNAL OF POLYMER SCIENCE 2019. [DOI: 10.1007/s10118-019-2329-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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2
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Shamsieva AV, Trigulova KR, Fayzullin RR, Khrizanforova VV, Budnikova YH, Musina EI, Karasik AA. Synthesis of water-soluble bis-N,O-chelate nickel(II) complexes based on new ligands – P-pyridyl-containing phospholane oxides. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2203-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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3
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Yang B, Storey RF. Chain-End Functionalization of Living Polyisobutylene via an End-Quenching Comonomer That Terminates by Indanyl Ring Formation. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01338] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bin Yang
- School of Polymer Science and Engineering, The University of Southern Mississippi, 118 College Drive #5050, Hattiesburg, Mississippi 39406, United States
| | - Robson F. Storey
- School of Polymer Science and Engineering, The University of Southern Mississippi, 118 College Drive #5050, Hattiesburg, Mississippi 39406, United States
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4
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Deike S, Malke M, Lechner BD, Binder WH. Constraining Polymers into β-Turns: Miscibility and Phase Segregation Effects in Lipid Monolayers. Polymers (Basel) 2017; 9:E369. [PMID: 30971043 PMCID: PMC6418963 DOI: 10.3390/polym9080369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 08/11/2017] [Accepted: 08/13/2017] [Indexed: 11/17/2022] Open
Abstract
Abstract: Investigation of model biomembranes and their interactions with natural or synthetic macromolecules are of great interest to design membrane systems with specific properties such as drug-delivery. Here we study the behavior of amphiphilic β-turn mimetic polymer conjugates at the air⁻water interface and their interactions with lipid model membranes. For this endeavor we synthesized two different types of conjugates containing either hydrophobic polyisobutylene (PIB, Mn = 5000 g·mol-1) or helical poly(n-hexyl isocyanate) (PHIC, Mn = 4000 g·mol-1), both polymers being immiscible, whereas polyisobutylene as a hydrophobic polymer can incorporate into lipid membranes. The conjugates were investigated using Langmuir-film techniques coupled with epifluorescence microscopy and AFM (Atomic Force Microscopy), in addition to their phase behavior in mixed lipid/polymer membranes composed of DPPC (dipalmitoyl-sn-glycero-3-phosphocholine). It was found that the DPPC monolayers are strongly disturbed by the presence of the polymer conjugates and that domain formation of the polymer conjugates occurs at high surface pressures (π > 30 mN·m-1).
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Affiliation(s)
- Stefanie Deike
- Faculty of Natural Science II, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany.
| | - Marlen Malke
- Faculty of Natural Science II, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany.
| | - Bob-Dan Lechner
- Faculty of Natural Science II, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany.
- School of Physics, University of Exeter, Stocker Road, Exeter EX4, UK.
| | - Wolfgang H Binder
- Faculty of Natural Science II, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle (Saale), Germany.
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Frenzel F, Folikumah MY, Schulz M, Anton AM, Binder WH, Kremer F. Molecular Dynamics and Charge Transport in Polymeric Polyisobutylene-Based Ionic Liquids. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Falk Frenzel
- Institute
of Experimental Physics I, Leipzig University, Linnéstrasse 5, 04103 Leipzig, Germany
| | - Makafui Y. Folikumah
- Institute
of Chemistry, Macromolecular Chemistry, Martin-Luther-University Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle, Germany
| | - Matthias Schulz
- Institute
of Chemistry, Macromolecular Chemistry, Martin-Luther-University Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle, Germany
| | - A. Markus Anton
- Institute
of Experimental Physics I, Leipzig University, Linnéstrasse 5, 04103 Leipzig, Germany
| | - Wolfgang H. Binder
- Institute
of Chemistry, Macromolecular Chemistry, Martin-Luther-University Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle, Germany
| | - Friedrich Kremer
- Institute
of Experimental Physics I, Leipzig University, Linnéstrasse 5, 04103 Leipzig, Germany
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Molecular arrangement of symmetric and non-symmetric triblock copolymers of poly(ethylene oxide) and poly(isobutylene) at the air/water interface. J Colloid Interface Sci 2015; 437:80-89. [PMID: 25313470 DOI: 10.1016/j.jcis.2014.09.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 09/12/2014] [Accepted: 09/15/2014] [Indexed: 12/16/2022]
Abstract
The behavior of a series of amphiphilic triblock copolymers of poly(ethylene oxide) (PEO) and poly(isobutylene) (PIB); including both symmetric (same degree of polymerization (DP) of the terminal PEO blocks) PEOm-b-PIBn-b-PEOm and non-symmetric (different DP of the terminal PEO blocks) PEOm-b-PIBn-b-PEOz, is investigated at the air/water interface by measuring surface pressure vs mean molecular area isotherms (π vs mmA), Langmuir-Blodgett (LB) technique, and infrared reflection-absorption spectroscopy (IRRAS). The block copolymer (PEO32-b-PIB160-b-PEO32) with longer PEO segments forms a stable monolayer and the isotherm reveals a pseudo-plateau starting at π∼5.7 mN/m, also observed in the IRRAS, which is assigned to the pancake-to-brush transition related to the PEO dissolution into the subphase and subsequent PEO brush dehydration. Another plateau is observed at π∼40 mN/m, which is attributed to the film collapse due to multilayer formation. The pancake-to-brush transition could not be observed for samples with smaller PEO chains. The isotherms for block copolymers, with short PEO chains, both symmetric (PEO3-b-PIBn-b-PEO3) and non-symmetric (PEO12-b-PIBn-b-PEO3), reveal another transition at π∼20-25 mN/m. This is interpreted to be due to the conformational transition from a folded state where the middle PIB block is anchored to the water surface at both ends by the terminal hydrophilic segments to an unfolded state with PIB anchored to the water surface at one end. It is assumed that this transition involves the removal of PEO3 chains from the water surface in case of non-symmetric PEO12-b-PIB85-b-PEO3 and in case of symmetric, probably one PEO3 of each PEO3-b-PIB85-b-PEO3 chain. Because of the weaker interaction of the short PEO3 chains with the water surface as compared with the relatively longer PEO12 chains, the film of PEO3-b-PIB85-b-PEO3 collapses at much lower surface pressure after the transition as compared with the PEO12-b-PIB85-b-PEO3. The AFM images reveal the formation of microdomains of almost uniform height (6-7 nm) in LB films of PEO3-b-PIB85-b-PEO3 and PEO12-b-PIB85-b-PEO3 after transferring onto silicon surfaces. These domains are assumed to be the mesomorphic domains of ordered and folded PIB chains.
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An approach to 1-phosphorylated isoquinolines through silver(I)-catalyzed tandem reaction involving C–N and C–P bond formation. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.060] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Alvarez Albarran A, Silantyeva E, Seo KS, Puskas JE. Synthesis of functionalized polyisobutylenes using the propylene epoxide/TiCl4initiating system. Polym Chem 2014. [DOI: 10.1039/c4py00363b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Malke M, Barqawi H, Binder WH. Synthesis of an Amphiphilic β-Turn Mimetic Polymer Conjugate. ACS Macro Lett 2014; 3:393-397. [PMID: 35590752 DOI: 10.1021/mz500108n] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A new biomimetic polymer containing a beta-turn mimetic element (1) was synthesized, using a combination of living carbocationic polymerization (LCCP), amidation, and "click" chemistry. Two different α-ω-functionalized polyisobutylenes (PIBs 3 and 5) bearing either an alkyne group (PIB 3) or a primary amine group (PIB 5) were directly synthesized via LCCP. The linking of the two PIB strands with the closely positioned carboxyl/azido moieties of a β-turn dipeptide (BTD) 2 was achieved via a sequence of amidation reaction and the CuI-mediated azide/alkyne "click" reaction. By means of size exclusion chromatography (SEC), matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS), NMR spectroscopy, and LC/MALDI-TOF MS, a detailed structural proof of the β-turn mimetic PIB conjugate (1) was possible.
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Affiliation(s)
- Marlen Malke
- Chair of Macromolecular Chemistry, Institute of Chemistry, Division of Technical and Macromolecular Chemistry, Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Martin-Luther-University Halle-Wittenberg, von-Danckelmann-Platz 4, Halle D-06120, Germany
| | - Haitham Barqawi
- Chair of Macromolecular Chemistry, Institute of Chemistry, Division of Technical and Macromolecular Chemistry, Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Martin-Luther-University Halle-Wittenberg, von-Danckelmann-Platz 4, Halle D-06120, Germany
| | - Wolfgang H. Binder
- Chair of Macromolecular Chemistry, Institute of Chemistry, Division of Technical and Macromolecular Chemistry, Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Martin-Luther-University Halle-Wittenberg, von-Danckelmann-Platz 4, Halle D-06120, Germany
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10
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Olubummo A, Schulz M, Schöps R, Kressler J, Binder WH. Phase changes in mixed lipid/polymer membranes by multivalent nanoparticle recognition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:259-267. [PMID: 24359326 DOI: 10.1021/la403763v] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Selective addressing of membrane components in complex membrane mixtures is important for many biological processes. The present paper investigates the recognition between multivalent surface functionalized nanoparticles (NPs) and amphiphilic block copolymers (BCPs), which are successfully incorporated into lipid membranes. The concept involves the supramolecular recognition between hybrid membranes (composed of a mixture of a lipid (DPPC or DOPC), an amphiphilic triazine-functionalized block copolymer TRI-PEO13-b-PIB83 (BCP 2), and nonfunctionalized BCPs (PEO17-b-PIB87 BCP 1)) with multivalent (water-soluble) nanoparticles able to recognize the triazine end group of the BCP 2 at the membrane surface via supramolecular hydrogen bonds. CdSe-NPs bearing long PEO47-thymine (THY) polymer chains on their surface specifically interacted with the 2,4-diaminotriazine (TRI) moiety of BCP 2 embedded within hybrid lipid/BCP mono- or bilayers. Experiments with GUVs from a mixture of DPPC/BCP 2 confirm selective supramolecular recognition between the THY-functionalized NPs and the TRI-functionalized polymers, finally resulting in the selective removal of BCP 2 from the hybrid vesicle membrane as proven via facetation of the originally round and smooth vesicles. GUVs (composed of DOPC/BCP 2) show that a selective removal of the polymer component from the fluid hybrid membrane results in destruction of hybrid vesicles via membrane rupture. Adsorption experiments with mixed monolayers from lipids with either BCP 2 or BCP 1 (nonfunctionalized) reveal that the THY-functionalized NPs specifically recognize BCP 2 at the air/water interface by inducing significantly higher changes in the surface pressure when compared to monolayers from nonspecifically interacting lipid/BCP 1 mixtures. Thus, recognition of multivalent NPs with specific membrane components of hybrid lipid/BCP mono- and bilayers proves the selective removal of BCPs from mixed membranes, in turn inducing membrane rupture. Such recognition events display high potential in controlling permeability and fluidity of membranes (e.g., in pharmaceutics).
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Affiliation(s)
- Adekunle Olubummo
- Chair of Macromolecular Chemistry, Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Institute of Chemistry, Martin-Luther University Halle-Wittenberg , D-06120 Halle (Saale), Germany
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11
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Abstract
A novel approach to prepare diarylmethyl phosphine oxides from benzyl phosphine oxides via deprotonative cross-coupling processes (DCCP) is reported. The optimization of the reaction was guided by High-Throughput Experimentation (HTE) techniques. The Pd(OAc)2/Xantphos-based catalyst enabled the reaction between benzyl diphenyl or dicyclohexyl phosphine oxide derivatives and aryl bromides in good to excellent yields (51-91%).
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Affiliation(s)
- Sonia Montel
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34 Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Tiezheng Jia
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34 Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34 Street, Philadelphia, Pennsylvania 19104-6323, United States
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12
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Barqawi H, Schulz M, Olubummo A, Saurland V, Binder WH. 2D-LC/SEC-(MALDI-TOF)-MS Characterization of Symmetric and Nonsymmetric Biocompatible PEOm–PIB–PEOn Block Copolymers. Macromolecules 2013. [DOI: 10.1021/ma401604h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Haitham Barqawi
- Faculty
of Natural Sciences II (Chemistry, Physics, Mathematics), Institute
of Chemistry, Chair of Macromolecular Chemistry, Martin-Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Matthias Schulz
- Faculty
of Natural Sciences II (Chemistry, Physics, Mathematics), Institute
of Chemistry, Chair of Macromolecular Chemistry, Martin-Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Adekunele Olubummo
- Faculty
of Natural Sciences II (Chemistry, Physics, Mathematics), Institute
of Chemistry, Chair of Macromolecular Chemistry, Martin-Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
| | - Volker Saurland
- Bruker Daltonik GmbH, Fahrenheitstrasse 4, 28359 Bremen, Germany
| | - Wolfgang H. Binder
- Faculty
of Natural Sciences II (Chemistry, Physics, Mathematics), Institute
of Chemistry, Chair of Macromolecular Chemistry, Martin-Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
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13
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Bertrand A, Lortie F, Bernard J. Routes to Hydrogen Bonding Chain-End Functionalized Polymers. Macromol Rapid Commun 2012; 33:2062-91. [DOI: 10.1002/marc.201200508] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 10/10/2012] [Indexed: 11/06/2022]
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14
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Olubummo A, Schulz M, Lechner BD, Scholtysek P, Bacia K, Blume A, Kressler J, Binder WH. Controlling the localization of polymer-functionalized nanoparticles in mixed lipid/polymer membranes. ACS NANO 2012; 6:8713-27. [PMID: 22950802 DOI: 10.1021/nn3023602] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Surface hydrophobicity plays a significant role in controlling the interactions between nanoparticles and lipid membranes. In principle, a nanoparticle can be encapsulated into a liposome, either being incorporated into the hydrophobic bilayer interior or trapped within the aqueous vesicle core. In this paper, we demonstrate the preparation and characterization of polymer-functionalized CdSe NPs, tuning their interaction with mixed lipid/polymer membranes from 1,2-dipalmitoyl-sn-glycero-3-phophocholine and PIB(87)-b-PEO(17) block copolymer by varying their surface hydrophobicity. It is observed that hydrophobic PIB-modified CdSe NPs can be selectively located within polymer domains in a mixed lipid/polymer monolayer at the air/water interface, changing their typical domain morphologies, while amphiphilic PIB-PEO-modified CdSe NPs showed no specific localization in phase-separated lipid/polymer films. In addition, hydrophilic water-soluble CdSe NPs can readily adsorb onto spread monolayers, showing a larger effect on the molecule packing at the air/water interface in the case of pure lipid films compared to mixed monolayers. Furthermore, the incorporation of PIB-modified CdSe NPs into hybrid lipid/polymer GUVs is demonstrated with respect to the prevailing phase state of the hybrid membrane. Monitoring fluorescent-labeled PIB-CdSe NPs embedded into phase-separated vesicles, it is demonstrated that they are enriched in one specific phase, thus probing their selective incorporation into the hydrophobic portion of PIB(87)-b-PEO(17) BCP-rich domains. Thus, the formation of biocompatible hybrid GUVs with selectively incorporated nanoparticles opens a new perspective for subtle engineering of membranes together with their (nano-) phase structure serving as a model system in designing functional nanomaterials for effective nanomedicine or drug delivery.
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Affiliation(s)
- Adekunle Olubummo
- Macromolecular Chemistry, Institute of Chemistry, Faculty of Natural Sciences II (Chemistry, Physics and Mathematics), Martin-Luther University Halle-Wittenberg, D-06120 Halle (Saale), Germany
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15
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Hackethal K, Herbst F, Binder WH. Synthesis and clustering of supramolecular “graft” polymers. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26257] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Zare P, Stojanovic A, Herbst F, Akbarzadeh J, Peterlik H, Binder WH. Hierarchically Nanostructured Polyisobutylene-Based Ionic Liquids. Macromolecules 2012. [DOI: 10.1021/ma202736g] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Parvin Zare
- Institute of Chemistry, Chair
of Macromolecular Chemistry, Faculty of Natural Sciences II (Chemistry,
Physics and Mathematics), Martin-Luther-University Halle-Wittenberg, Von-Danckelmann-Platz 4, Halle 06120, Germany
| | - Anja Stojanovic
- Institute of Chemistry, Chair
of Macromolecular Chemistry, Faculty of Natural Sciences II (Chemistry,
Physics and Mathematics), Martin-Luther-University Halle-Wittenberg, Von-Danckelmann-Platz 4, Halle 06120, Germany
| | - Florian Herbst
- Institute of Chemistry, Chair
of Macromolecular Chemistry, Faculty of Natural Sciences II (Chemistry,
Physics and Mathematics), Martin-Luther-University Halle-Wittenberg, Von-Danckelmann-Platz 4, Halle 06120, Germany
| | - Johanna Akbarzadeh
- Faculty of Physics, Dynamics
of Condensed Systems, University of Vienna, Strudlhofgasse 4, 1090 Vienna, Austria
| | - Herwig Peterlik
- Faculty of Physics, Dynamics
of Condensed Systems, University of Vienna, Strudlhofgasse 4, 1090 Vienna, Austria
| | - Wolfgang H. Binder
- Institute of Chemistry, Chair
of Macromolecular Chemistry, Faculty of Natural Sciences II (Chemistry,
Physics and Mathematics), Martin-Luther-University Halle-Wittenberg, Von-Danckelmann-Platz 4, Halle 06120, Germany
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