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Performance and mechanism of D–A type phenothiazine thermochromic materials for low-temperature sensing
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DOI:10.1016/j.jlumin.2026.122020.png)
Abstract
En 中文
• Two D–A phenothiazine materials designed for cryogenic optical thermometry. • Clear thermochromism from yellow to blue in 80–200 K with 1.94% K−1 sensitivity. • Mechanism: thermal disruption of molecular conjugation enlarges energy gap. • SRFR-3PTZ achieves 0.5 K resolution, superior to existing low-temperature probes. • Fluorescence-dominant emission confirmed by excited-state dynamics analysis.
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