Lithium Phthalocyanine (γ-structure) As a Molecular Oxygen Sensor

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Date 2025 Feb 6

PMID 39911542

Authors

Elena Tomsik

Zulfiya Cernochova

Magdalena Scheibe

Krzysztof Tadyszak

Affiliations

Soon will be listed here.

Abstract

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 γphase 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 LiPc and LiPc sensors.

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