A macroring composed of three Cu(II) porphyrins (CuP) and three slipped-cofacial Zn(II) porphyrin (ZnP₂) dimers exhibited near-IR emission from the CuP part. The emission lifetime of the macroring (15 μs) was 500 times longer compared to that of a Cu porphyrin monomer (e.g., Cu(II)TPP; TPP = meso-tetraphenylporphyrin). The observed emission is ascribed to emission via the reservoir mechanism from the trip-doublet (²T₁) state in CuP thermally activated from the T₁ state of ZnP₂, which is located ca. 1030 cm⁻¹ below the ²T₁ state of CuP. The near-IR emission of the macroring was significantly quenched by O₂, whereas that of the Cu porphyrin monomer was hardly quenched, indicating that the quenching event mainly occurred on the T₁ state of the ZnP₂ parts. The nonemissive triplet state of a Zn porphyrin at room temperature was visualized through emission from a neighboring Cu porphyrin.

中文翻译：

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锌的非发射三重物种的可视化（II）通过铜（卟啉II）卟啉发射通过在卟啉macroring贮存机构†

由三个Cu（II）卟啉（CuP）和三个滑面Zn（II）卟啉（ZnP ₂）二聚体组成的大环显示出CuP部分的近红外发射。所述macroring（15微秒）的发光寿命较长500倍相比，铜卟啉单体（例如，铜（II）TPP; TPP =内消旋-tetraphenylporphyrin）。观察到的排放归因于通过储库机制从CuP的三重双态（² T ₁）态发射，该CuP从ZnP ₂的T ₁态热激活，而CuP的位置约为。1030厘米^-1低于CuP的² T ₁状态。大环的近红外发射被O ₂显着淬灭，而铜卟啉单体的近红外发射几乎未淬灭，表明淬灭事件主要发生在ZnP ₂部分的T ₁状态。锌卟啉在室温下的非三重态通过邻近的铜卟啉的发射可见。