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Gal YS, Jin SH, Park J, Lim KT. An ionic conjugated polymer from the catalyst-free polymerization of 2-ethynylpyridine using 3,4,5-trimethoxybenzoyl chloride. Macromol Res 2017. [DOI: 10.1007/s13233-017-5107-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Faukner T, Zukal A, Brus J, Zedník J, Sedláček J. Ionic π-Conjugated Polymer Networks by Catalyst-Free Polymerization, Photoluminescence and Gas Sorption Behavior. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600092] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tomáš Faukner
- Faculty of Science, Department of Physical and Macromolecular Chemistry; Charles University in Prague; Hlavova 2030 128 40 Prague 2 Czech Republic
| | - Arnošt Zukal
- Academy of Sciences of the Czech Republic; J. Heyrovský Institute of Physical Chemistry; Dolejčkova 3 182 23 Prague Czech Republic
| | - Jiří Brus
- Academy of Sciences of the Czech Republic; Institute of Macromolecular Chemistry; Heyrovský sq. 2 162 06 Prague Czech Republic
| | - Jiří Zedník
- Faculty of Science, Department of Physical and Macromolecular Chemistry; Charles University in Prague; Hlavova 2030 128 40 Prague 2 Czech Republic
| | - Jan Sedláček
- Faculty of Science, Department of Physical and Macromolecular Chemistry; Charles University in Prague; Hlavova 2030 128 40 Prague 2 Czech Republic
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π-Conjugated Polyelectrolytes Derived from 2-Ethynylpyridine: The Effect of Quaternization Agent and Reaction Conditions on the Polymer Structure and SERS Characterization of Nanocomposites with Ag-Nanoparticles. Macromol Res 2016. [DOI: 10.1007/s13233-016-4062-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kazim S, Jäger A, Steinhart M, Pfleger J, Vohlídal J, Bondarev D, Štěpánek P. Morphology and Kinetics of Aggregation of Silver Nanoparticles Induced with Regioregular Cationic Polythiophene. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2-11. [PMID: 26630552 DOI: 10.1021/acs.langmuir.5b03365] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The aggregation kinetics of negatively charged borate-stabilized silver nanoparticles (NPs) induced by the cationic regioregular polythiophene polyelectrolyte poly{3-[6-(1-methylimidazolium-3-yl)hexyl]thiophene-2,5-diyl bromide} (PMHT-Br) and the morphology of formed aggregates have been investigated via ultraviolet-visible light (UV-vis) spectroscopy, transmission electron microscopy (TEM), zeta (ζ) potential measurements, dynamic light scattering (DLS), and time-resolved small-angle X-ray scattering (SAXS). Two or three populations of NPs are formed within milliseconds upon mixing the components, which differ in the mean size, extent of polymer coating, and time stability. These characteristics are primarily controlled by the PMHT-Br to Ag-NPs ratio. Population of single NPs of a mean size of ∼5 nm is present in every system and is mostly stable for a long time. At low ratios, the single NPs are most probably almost free of polymer chains and the second population includes slow, but in a limited extent, growing NPs in which single NPs might be interconnected by polymer chains. At the ratios corresponding to the charge balance in the system (ca. zero ζ-potential of NPs), the NPs aggregate, forming a second population that continuously grows in size, and finally undergo sedimentation. At the high ratios, three long-time stable populations of NPs are observed, having mean sizes of ca. 5, 13, and 35 nm; all NPs should be fully coated with PMHT-Br, giving them a positively charged stabilizing shell.
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Affiliation(s)
- Samrana Kazim
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic , v.v.i., Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Alessandro Jäger
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic , v.v.i., Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Miloš Steinhart
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic , v.v.i., Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Jiří Pfleger
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic , v.v.i., Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
| | - Jiří Vohlídal
- Charles University in Prague , Faculty of Science, Department of Physical and Macromolecular Chemistry, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Dmitrij Bondarev
- Charles University in Prague , Faculty of Science, Department of Physical and Macromolecular Chemistry, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Petr Štěpánek
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic , v.v.i., Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
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Faukner T, Trhlíková O, Zedník J, Sedláček J. Ionic π-Conjugated Polyelectrolytes by Catalyst Free Polymerization of Bis(pyridyl)acetylenes and Bis[(pyridyl)ethynyl]benzenes. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500147] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tomáš Faukner
- Department of Physical and Macromolecular Chemistry; Faculty of Science Charles University in Prague; Hlavova 2030 CZ-128 40 Prague 2 Czech Republic
| | - Olga Trhlíková
- Institute of Macromolecular Chemistry, v.v.i; Academy of Sciences of the Czech Republic; Heyrovsky´ Sq. 2 CZ-162 06 Prague 6 Czech Republic
| | - Jiří Zedník
- Department of Physical and Macromolecular Chemistry; Faculty of Science Charles University in Prague; Hlavova 2030 CZ-128 40 Prague 2 Czech Republic
| | - Jan Sedláček
- Department of Physical and Macromolecular Chemistry; Faculty of Science Charles University in Prague; Hlavova 2030 CZ-128 40 Prague 2 Czech Republic
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Petrášová S, Zukal A, Brus J, Balcar H, Pastva J, Zedník J, Sedláček J. New Hyper-Crosslinked Partly Conjugated Networks with Tunable Composition by Spontaneous Polymerization of Ethynylpyridines with Bis(bromomethyl)arenes: Synthesis, Spectral Properties, and Activity in CO2Capture. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201300540] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Sabina Petrášová
- Department of Physical and Macromolecular Chemistry, Faculty of Science; Charles University in Prague; Hlavova, 2030 CZ-128 40 Prague 2 Czech Republic
| | - Arnošt Zukal
- J. Heyrovský Institute of Physical Chemistry, v.v.i; Academy of Sciences of the Czech Republic; Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Jiří Brus
- Institute of Macromolecular Chemistry, v.v.i.; Academy of Sciences of the Czech Republic; Heyrovský Sq. 2 16206 Prague 6 Czech Republic
| | - Hynek Balcar
- J. Heyrovský Institute of Physical Chemistry, v.v.i; Academy of Sciences of the Czech Republic; Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Jakub Pastva
- J. Heyrovský Institute of Physical Chemistry, v.v.i; Academy of Sciences of the Czech Republic; Dolejškova 3 182 23 Prague 8 Czech Republic
| | - Jiří Zedník
- Department of Physical and Macromolecular Chemistry, Faculty of Science; Charles University in Prague; Hlavova, 2030 CZ-128 40 Prague 2 Czech Republic
| | - Jan Sedláček
- Department of Physical and Macromolecular Chemistry, Faculty of Science; Charles University in Prague; Hlavova, 2030 CZ-128 40 Prague 2 Czech Republic
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Trhlíková O, Zedník J, Vohlídal J, Sedláček J. SEC/DAD and 1
H NMR Study of Molecular Weight and Configurational Stability of Poly(2,4-difluorophenylacetylene) and Polyphenylacetylene Prepared with Rh Catalyst. MACROMOL CHEM PHYS 2011. [DOI: 10.1002/macp.201100228] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Trhlíková O, Zedník J, Vohlídal J, Sedláček J. Molecular weight and configurational stability of poly(phenylacetylene) prepared with Rh catalyst. Polym Degrad Stab 2011. [DOI: 10.1016/j.polymdegradstab.2011.04.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Taylor RW, Lee TC, Scherman OA, Esteban R, Aizpurua J, Huang FM, Baumberg JJ, Mahajan S. Precise subnanometer plasmonic junctions for SERS within gold nanoparticle assemblies using cucurbit[n]uril "glue". ACS NANO 2011; 5:3878-87. [PMID: 21488693 DOI: 10.1021/nn200250v] [Citation(s) in RCA: 229] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Cucurbit[n]urils (CB[n]) are macrocyclic host molecules with subnanometer dimensions capable of binding to gold surfaces. Aggregation of gold nanoparticles with CB[n] produces a repeatable, fixed, and rigid interparticle separation of 0.9 nm, and thus such assemblies possess distinct and exquisitely sensitive plasmonics. Understanding the plasmonic evolution is key to their use as powerful SERS substrates. Furthermore, this unique spatial control permits fast nanoscale probing of the plasmonics of the aggregates "glued" together by CBs within different kinetic regimes using simultaneous extinction and SERS measurements. The kinetic rates determine the topology of the aggregates including the constituent structural motifs and allow the identification of discrete plasmon modes which are attributed to disordered chains of increasing lengths by theoretical simulations. The CBs directly report the near-field strength of the nanojunctions they create via their own SERS, allowing calibration of the enhancement. Owing to the unique barrel-shaped geometry of CB[n] and their ability to bind "guest" molecules, the aggregates afford a new type of in situ self-calibrated and reliable SERS substrate where molecules can be selectively trapped by the CB[n] and exposed to the nanojunction plasmonic field. Using this concept, a powerful molecular-recognition-based SERS assay is demonstrated by selective cucurbit[n]uril host-guest complexation.
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Affiliation(s)
- Richard W Taylor
- NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, U.K
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Kazim S, Pfleger J, Procházka M, Bondarev D, Vohlídal J. Colloidal systems of silver nanoparticles and high-regioregular cationic polythiophene with ionic-liquid-like pendant groups: Optical properties and SERS. J Colloid Interface Sci 2011; 354:611-9. [DOI: 10.1016/j.jcis.2010.11.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Revised: 11/12/2010] [Accepted: 11/17/2010] [Indexed: 10/18/2022]
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Bondarev D, Zedník J, Plutnarová I, Vohlídal J, Sedláček J. Molecular weight and configurational stability of poly[(fluorophenyl)acetylene]s prepared with metathesis and insertion catalysts. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24218] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bondarev D, Zedník J, Šloufová I, Sharf A, Procházka M, Pfleger J, Vohlídal J. Synthesis and properties of cationic polyelectrolyte with regioregular polyalkylthiophene backbone and ionic-liquid like side groups. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24085] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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