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The Interplay of Nanoconfinement and pH from the Perspective of a Dye‐Reporter Molecule

Brilmayer, Robert ; Brodrecht, Martin ; Kaiser, Christoph ; Breitzke, Hergen ; Kumari, Bharti ; Wachtveitl, Josef ; Buntkowsky, Gerd ; Andrieu‐Brunsen, Annette (2021)
The Interplay of Nanoconfinement and pH from the Perspective of a Dye‐Reporter Molecule.
In: ChemNanoMat, 6 (12)
doi: 10.26083/tuprints-00019731
Article, Secondary publication, Publisher's Version

Copyright Information: CC BY-NC-ND 4.0 International - Creative Commons, Attribution NonCommercial, NoDerivs.

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Item Type: Article
Type of entry: Secondary publication
Title: The Interplay of Nanoconfinement and pH from the Perspective of a Dye‐Reporter Molecule
Language: English
Date: 13 October 2021
Place of Publication: Darmstadt
Publisher: Wiley
Journal or Publication Title: ChemNanoMat
Volume of the journal: 6
Issue Number: 12
DOI: 10.26083/tuprints-00019731
Corresponding Links:
Origin: Secondary publication service

A novel thiazol-based ratiometric dye for the detection of local pH values is synthesized, and its properties are characterized by a combination of optical spectroscopy, solid-state NMR and DNP (dynamic nuclear polarization)-enhanced solid-state NMR. This novel dye covers a completely different sensitivity range with its acidic pKa value of 3.5 compared to other established dyes for ratiometric pH detection, such as SNARF. The dye is grafted to the surfaces of mesoporous silica materials, which enables, for the first time, direct in situ measurements of the local pH values in silica mesopores by a simple UV-vis spectroscopy method. The obtained results, which are in good agreement with previous indirect techniques, indicate a background electrolyte-dependent pKa shift of at least one pH unit under nanoconfined conditions compared to the pKa of the dye in bulk solution.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-197318
Additional Information:

Supplement: https://onlinelibrary.wiley.com/action/downloadSupplement?doi=10.1002%2Fcnma.202000423&file=cnma202000423-sup-0001-misc_information.pdf

Classification DDC: 500 Science and mathematics > 540 Chemistry
Divisions: 07 Department of Chemistry > Ernst-Berl-Institut > Fachgebiet Makromolekulare Chemie
Date Deposited: 13 Oct 2021 13:55
Last Modified: 14 Nov 2023 19:04
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19731
PPN: 503404977
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