由于酞菁的大共轭结构，以及磷(V)的强拉电子能力，使磷酞菁成为了一类新型的近红外二区(NIR-II, 1000-1700 nm染料，已经被用于近红外二区荧光成像，光声成像以及光热治疗等。
参考文献：
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Jun Xia, Jonathan F. Lovell*, Theranostics 2016, 6: 688.
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