9-aminoporphycenes degrade over time, yielding products that emit in a similar spectral region as the parent compounds. This leads to a triple fluorescence pattern, with relative intensities changing with time, solvent, excitation wavelength, and irradiation. The decomposition products were analyzed using chromatography coupled with mass spectrometry, absorption, and emission measurements. The spectra of possible products were also calculated using density functional theory. We conclude that the degradation processes involve oxygenation that occurs both in the ground electronic state and as a photoinduced process, the latter being more efficient.

中文翻译：

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9-氨基卟啉的不稳定性

9-氨基卟啉会随着时间的推移而降解，产生与母体化合物在相似光谱范围内发射的产物。这导致了三重荧光图案，其相对强度随着时间、溶剂、激发波长和照射而变化。使用色谱法结合质谱、吸收和发射测量来分析分解产物。还使用密度泛函理论计算了可能产物的光谱。我们得出的结论是，降解过程涉及在基电子态和光诱导过程中发生的氧化，后者更有效。