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| 质子调控“Off-On-Off”型三联吡啶Ru(II)配合物近红外光开关 |
| Proton-Induced Off–On–Off Near-Infrared Photoswitching Based on a Ruthenium(II)–Terpyridine Complex |
| 投稿时间：2025-11-18 修订日期：2025-12-23 |
| DOI： |
| 中文关键词: 近红外发光 pH 钌(II)配合物 光开关 |
| 英文关键词:NIR Emission, pH, Ruthenium complex, photo switch |
| 基金项目:全国大学生创新创业项目 |
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| 摘要点击次数: 19 |
| 全文下载次数: 0 |
| 中文摘要: |
| 设计合成一种新型近红外发光钌(II)配合物[Ru(Bitpy)(Ppytpy)](ClO4)2。该配合物在空气饱和水溶液中于730 nm处呈现近红外发射，兼具225 nm的大斯托克斯位移与0.0031的相对量子产率。值得注意的是，其pKa1 = 2.27，在强酸条件下既表现出显著的pH响应特性，且保持了优异的光稳定性。在Britton-Robinson缓冲体系中，该配合物展现出独特的“off-on-off”型近红外发光开关行为，且一个关键开关转换点位于强酸区。这一特性使其有望克服传统探针在胃酸等极端环境中的局限性，为开发近红外、耐酸型光动力学药物提供了新的候选材料。 |
| 英文摘要: |
| A novel near-infrared (NIR)-emitting Ru(II) complex [Ru(Bitpy)(Ppytpy)](ClO4)2 was designed and synthesized. The complex exhibits bright NIR emission at 730 nm in air-saturated aqueous solution, along with a large Stokes shift of 225 nm and a relative quantum yield of 0.0031. With a pKa1 of 2.27, it demonstrates a pronounced pH response coupled with excellent photostability under strong acidity. This combination of properties enables a unique "off-on-off " NIR luminescence switching behavior in Britton-Robinson buffer, with a key transition in the strongly acidic region. This acid-tolerant switching profile suggests its potential for applications such as gastric acid environment detection and acid-resistant NIR photodynamic therapeutics, overcoming the limitations of conventional probes. |
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