Spectral and Photophysical Data for a Tetrahydropentalene Photon Upconversion Acceptor

Experimental data elucidates the photon upconversion properties of the acceptor molecule TP-An, including a fluorescence quantum yield of unity and a triplet excited state lifetime of 654 μs. The dataset was authored by Tomoki Nagaoka and published via figshare in April 2026. It contains measured photophysical parameters from spectroscopic analysis of a toluene solution system.

Use Cases

• Correlate the acceptor's rigid structure (TP-An) with its measured singlet excited state lifetime of 1.13 ns and unity fluorescence quantum yield.
• Model the efficiency of triplet-triplet annihilation (TTA) using the reported singlet energy (E_S, 3.22 eV) and triplet energy (E_T, 1.62–1.79 eV) levels.
• Benchmark photon upconversion performance using the reported threshold excitation intensity (10 mW cm–2) and PUC quantum yield (ca 23%).
• Analyze the relationship between the long triplet excited state lifetime (654 μs) and the observed anti-Stokes shift of 0.89 eV in the green-to-purple upconversion.

Strengths

• Reports precise, key photophysical metrics including fluorescence quantum yield (unity) and triplet lifetime (654 μs).
• Provides multiple energy values (E_S, E_T) and performance metrics (threshold intensity, PUC yield) for system characterization.
• Data is recent, published in April 2026.

Limitations

• Dataset is extremely small (2.8 KB), indicating it contains only summary parameters, not raw spectral or time-series data.
• Scope is limited to a single acceptor molecule (TP-An) in a specific solvent (toluene) under degassed conditions.
• Sample size for the reported measurements (e.g., number of experimental replicates) is unknown.

Provenance

Source

Tomoki Nagaoka, published on figshare.

Collection Method

Experimental spectroscopic analysis of a synthesized organic acceptor in solution.

Freshness

Published in April 2026.