An octahydroxylated photosensitizing Zn phthalocyanine has been used as an initiator in ring-opening polymerization of $𝜀$-caprolactone. Three different phthalocyanine-core star polymers have been obtained, with each arm functionalized with either 20, 30, or 40 units. To benefit from the absorption of these polymers in the first near-infrared (NIR) phototherapeutic window, the phthalocyanine cores have been self-encapsulated into their polycaprolactone arms to yield biocompatible star polymeric nanoparticles exhibiting a remarkable absorption centered at 782 nm and an excellent logarithmic extinction coefficient value in water.

中文翻译：

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近红外吸收自包封酞菁核聚己内酯星形聚合物纳米颗粒

八羟基化光敏锌酞菁已被用作开环聚合的引发剂$𝜀$-己内酯。获得了三种不同的酞菁核星形聚合物，每个臂用 20、30 或 40 个单元进行功能化。为了受益于这些聚合物在第一个近红外 (NIR) 光治疗窗口中的吸收，酞菁核心已被自封装到其聚己内酯臂中，以产生生物相容性星形聚合物纳米粒子，该纳米粒子表现出以 782 nm 为中心的显着吸收和出色的对数水中的消光系数值。