About: UV/Vis Study of the Alkali Salts of Poly(thiophen-3-ylacetic acid) in Water

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Description	UV/Vis spectroscopic investigation of aqueous solutions of regio-irregular poly(thiophen-3-ylacetic acid) (PTAA) with and without methyl-ester groups in the presence of sodium and lithium ions as counterions is presented. The samples were carefully purified and characterized with respect to molar mass and the amount of -COOH groups present. We examined how the UV/Vis spectra of solution change with aging of PTAA solution, polymer concentration, addition of low molecular weight salt, temperature, and some other parameters. We show that results crucially depend on whether the spectra are taken for freshly prepared or mature solutions. We demonstrate the validity of the Beer-Lambert law for PTANa, PTAA/Na, and PTAA/Li (aged solution), and violation of this law for PTANa/Me (fresh) solutions in water; the latter system is instead found to exhibit an isosbetic point at 402 nm. We prove that UV/Vis spectra of polythiophene derivatives in water depend on the %22age%22 (time after dissolution) of the solution. The inconsistencies among the spectroscopic data found in literature, as also the discrepancies with our own measurements on PTAA-based systems are discussed UV/Vis spectroscopic investigation of aqueous solutions of regio-irregular poly(thiophen-3-ylacetic acid) (PTAA) with and without methyl-ester groups in the presence of sodium and lithium ions as counterions is presented. The samples were carefully purified and characterized with respect to molar mass and the amount of -COOH groups present. We examined how the UV/Vis spectra of solution change with aging of PTAA solution, polymer concentration, addition of low molecular weight salt, temperature, and some other parameters. We show that results crucially depend on whether the spectra are taken for freshly prepared or mature solutions. We demonstrate the validity of the Beer-Lambert law for PTANa, PTAA/Na, and PTAA/Li (aged solution), and violation of this law for PTANa/Me (fresh) solutions in water; the latter system is instead found to exhibit an isosbetic point at 402 nm. We prove that UV/Vis spectra of polythiophene derivatives in water depend on the %22age%22 (time after dissolution) of the solution. The inconsistencies among the spectroscopic data found in literature, as also the discrepancies with our own measurements on PTAA-based systems are discussed (en)
Title	UV/Vis Study of the Alkali Salts of Poly(thiophen-3-ylacetic acid) in Water UV/Vis Study of the Alkali Salts of Poly(thiophen-3-ylacetic acid) in Water (en)
skos:prefLabel	UV/Vis Study of the Alkali Salts of Poly(thiophen-3-ylacetic acid) in Water UV/Vis Study of the Alkali Salts of Poly(thiophen-3-ylacetic acid) in Water (en)
skos:notation	RIV/00216208:11310/12:10123733!RIV13-GA0-11310___
http://linked.open...avai/predkladatel	Přírodovědecká fakulta
http://linked.open...avai/riv/aktivita	I P S Z
http://linked.open...avai/riv/aktivity	I, P(GAP108/12/1143), S, Z(MSM0021620857)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Bondarev, Dmitrij Vohlídal, Jiří
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	176766
http://linked.open...ai/riv/idVysledku	RIV/00216208:11310/12:10123733
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	conformational relaxation; aging; UV/Vis spectroscopy; conformational transition; polythiophenes; Polyelectrolytes (en)
http://linked.open.../riv/klicoveSlovo	UV/Vis spectroscopy aging Polyelectrolytes conformational relaxation conformational transition polythiophenes
http://linked.open...odStatuVydavatele	SI - Slovinská republika
http://linked.open...ontrolniKodProRIV	[248EAC65049C]
http://linked.open...i/riv/nazevZdroje	Acta Chimica Slovenica
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Polyelectrolytic conjugated dynamers: preparation, constitutional dynamics and functional properties of new materials
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	59
http://linked.open...iv/tvurceVysledku	Bondarev, Dmitrij Vohlídal, Jiří Cerar, Janez Hostnik, Gregor Vlachy, Vojko
http://linked.open...ain/vavai/riv/wos	000308792600018
http://linked.open...n/vavai/riv/zamer	Nové molekulární systémy pro pokročilé aplikace prospěšné pro zdraví a šetrné k životnímu prostředí
issn	1318-0207
number of pages	11 (xsd:int)
http://localhost/t...ganizacniJednotka	11310
is http://linked.open...avai/riv/vysledek of	UV/Vis Study of the Alkali Salts of Poly(thiophen-3-ylacetic acid) in Water

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