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Lithium phthalocyanine (gamma-structure) as a molecular oxygen sensor
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SYSNO ASEP 0612021 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Lithium phthalocyanine (gamma-structure) as a molecular oxygen sensor Author(s) Tomšík, Elena (UMCH-V) RID, ORCID
Černochová, Zulfiya (UMCH-V) RID, ORCID
Scheibe, Magdalena Anna (UFCH-W)
Tadyszak, Krzysztof (UMCH-V) RID, ORCIDSource Title RSC Advances. - : Royal Society of Chemistry - ISSN 2046-2069
Roč. 15, č. 5 (2025), s. 3738-3748Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords lithium phthalocyanine ; electron paramagnetic resonance ; molecular oxygen sensor Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Subject RIV - cooperation J. Heyrovsky Institute of Physical Chemistry - Electrochemistry R&D Projects LM2023053 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LUAUS24272 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EH22_008/0004607 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UMCH-V - RVO:61389013 ; UFCH-W - RVO:61388955 UT WOS 001413274800001 EID SCOPUS 85217933749 DOI https://doi.org/10.1039/D4RA08335K Annotation Synthesis and characterization of lithium phthalocyanine radicals were performed, which were followed by an investigation on its ability to detect oxygen levels in biologically relevant concentrations. EPR studies confirmed the presence of at least two phases, one sensitive to oxygenation (γ-phase) and the second one insensitive to oxygenation (α-phase). Contrary to the findings reported in the literature, it was observed that the γ-phase was not stable at and above 95 °C and slowly transformed into the α-phase crystallographic structure. Above 150 °C, only a broad signal of α-phase existed. Additional characterizations were performed using electrochemical impedance spectroscopy (EIS), cyclic voltammetry, dynamic light scattering (DLS), and Raman spectroscopy on pristine crystals Li2Pc and LiPc sensors. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2026 Electronic address https://pubs.rsc.org/en/content/articlelanding/2025/ra/d4ra08335k
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