A Symmetric and Rigid Tetrahydropentalene Derivative as an Ideal Acceptor for Efficient Triplet–Triplet Annihilation-Assisted Photon Upconversion

Experimental data characterizes a novel organic acceptor molecule, TP-An, for efficient green-to-purple photon upconversion. The dataset includes specific photophysical properties such as a singlet excited state lifetime of 1.13 ns, a triplet excited state lifetime of 654 μs, and a photon upconversion quantum yield of approximately 23%. This data was published by Tomoki Nagaoka on figshare in April 2026.

Use Cases

• Analyze the relationship between molecular rigidity (TP-An structure) and long triplet excited state lifetime (654 μs) for improved photon upconversion efficiency.
• Model the exergonic triplet-triplet annihilation condition using the provided singlet (3.22 eV) and triplet (1.62–1.79 eV) excited state energy levels.
• Benchmark the low threshold excitation intensity (10 mW cm⁻²) and photon upconversion quantum yield (ca 23%) against other acceptor materials in solution-based systems.
• Investigate the anti-Stokes shift (0.89 eV) for the green-to-purple photon upconversion behavior observed in the toluene solution system.

Strengths

• Dataset reports precise, experimentally determined photophysical values, including a singlet lifetime of 1.13 ns and a triplet lifetime of 654 μs.
• Key metrics for photon upconversion performance are provided, such as a 23% quantum yield and a low 10 mW cm⁻² threshold intensity.

Limitations

• The dataset is extremely small (2.8 KB), indicating it contains only summary results for a single molecular system, not extensive raw measurement data.
• Data is limited to a single acceptor molecule (TP-An) in a specific solvent (toluene), restricting generalizability to other chemical environments.
• No raw spectral data, time-series measurements, or columnar data structure is described, limiting detailed re-analysis.

Provenance

Source

Tomoki Nagaoka, published on the figshare repository.

Collection Method

Experimental measurement of photophysical properties in a solution system, likely involving spectroscopic techniques.

Freshness

Data was last updated in April 2026, indicating it is recent.