Photooxidation provides a promising strategy for photocatalysis, photodynamic therapy, and environmental protection. Unfortunately, most organic photosensitizers possess weak hydrophilicity and a π–π conjugated structure, leading to singlet oxygen self-quenching, poor loadability and therefore unsatisfactory photooxidation efficiency. Thus, dispersion of these photosensitizers within a two-dimensional porous covalent organic framework has become a feasible strategy to hinder their self-aggregation and augment their loading capacity. Here, we report a phthalocyanine-based photosensitizer loaded on covalent organic framework nanosheets. This nano-photosensitizer exhibits highly dispersed organic fluorescent phthalocyanines and a high loading capacity. The fabricated nanosheets restrict self-aggregation of photosensitizer molecules and enhance the photooxidation activity, which may offer a new paradigm for photooxidation and its multiple applications.

中文翻译：

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基于共价有机骨架纳米片的纳米光敏剂，具有高负载和治疗功效

光氧化为光催化，光动力疗法和环境保护提供了一种有前途的策略。不幸的是，大多数有机光敏剂具有弱的亲水性和π-π共轭结构，导致单线态氧的自猝灭，较差的负载性，因此光氧化效率不令人满意。因此，将这些光敏剂分散在二维多孔共价有机框架内已经成为可行的策略，以阻碍它们的自聚集和增加其负载能力。在这里，我们报告了装载在共价有机骨架纳米片上的基于酞菁的光敏剂。该纳米光敏剂表现出高度分散的有机荧光酞菁和高负载能力。