Construction of BODIPY-based Triangular Metallacycles with Tunable Photosensitization Efficiency

Pei-Pei Jia,Yi-Xiong Hu, Zhen-Chen Lou, Xuelei Ji, Xing-Dong Xu,Haitao Sun,Tongxia Jin, Feng Zheng,Lin Xu

Chinese Chemical Letters（2025）

Wuhu Hospital | College of New Energy | State Key Laboratory of Precision Spectroscopy

Cited 0|Views6

Abstract

The development of highly effective photosensitizers (PSs) based on supramolecular coordination complexes (SCCs) is highly appealing in supramolecular chemistry, materials science, and biology. SCCs offer promising platforms for incorporating multiple PSs and other functional units into their well-defined structures, allowing for precise control over the number and distribution of these components. In this study, we present an efficient and straightforward method for modulating the photosensitization process of PSs derived from a family of BF2-chelated dipyrromethene (BODIPY)-containing Pt(II) metallacycles by varying pre-designed Pt(II) acceptors. By utilizing different Pt(II) acceptors with varying Pt atom configurations and degrees of π-conjugated organic moieties, we observed tunable characteristics in the photosensitization process and singlet oxygen (1O2) generation efficiency of these targeted metallacycles. Furthermore, we successfully conducted the visible-light-driven oxidative coupling of various amines to imines, catalyzed by the prepared metallacycle PSs. This study offers a novel approach for fabricating efficient PSs based on SCCs, featuring tunable photosensitization efficiency and excellent photocatalytic reactivity, while providing new insights into the preparation of effective PSs.

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Key words

Photochemistry,Coordination-driven self-assembly,Metallacycle,BODIPY,Photosensitization

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【要点】：本研究开发了一种基于BODIPY的三角形金属环结构的光敏剂，通过改变预先设计的Pt(II)受体实现了光敏化效率的可调性，为高效光敏剂的构建提供了新方法。

【方法】：研究利用不同配置的Pt(II)受体和不同程度的π-共轭有机基团，调控了目标金属环的光敏化过程和 singlet oxygen (1O2) 生成效率。

【实验】：实验中，通过可见光驱动的氧化偶联反应，将不同胺类化合物催化转化为亚胺，所使用的数据集为合成的BODIPY基Pt(II)金属环光敏剂，实验结果显示了优异的光催化活性。