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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. (Publisher's Version)
In: ChemNanoMat, 6 (12), pp. 1843-1853. Wiley, e-ISSN 2199-692X,
DOI: 10.26083/tuprints-00019731,
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Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
Title: The Interplay of Nanoconfinement and pH from the Perspective of a Dye‐Reporter Molecule
Language: English
Abstract:

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.

Journal or Publication Title: ChemNanoMat
Journal volume: 6
Number: 12
Publisher: Wiley
Classification DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Divisions: 07 Department of Chemistry > Fachgebiet Makromolekulare Chemie
Date Deposited: 13 Oct 2021 13:55
Last Modified: 13 Oct 2021 13:55
DOI: 10.26083/tuprints-00019731
Corresponding Links:
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

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/19731
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