Conjugated Polymer-Based Hybrid Nanoparticles with Two-Photon Excitation and Near-Infrared Emission Features for Fluorescence Bioimaging within the Biological Window

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• 作者：Yanlin Lv ; Peng Liu ; Hui Ding ; Yishi Wu ; Yongli Yan ; Heng Liu ; Xuefei Wang ; Fei Huang ; Yongsheng Zhao ; Zhiyuan Tian
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：September 23, 2015
• 年：2015
• 卷：7
• 期：37
• 页码：20640-20648
• 全文大小：527K
• ISSN：1944-8252

文摘

Hybrid fluorescent nanoparticles (NPs) capable of fluorescing near-infrared (NIR) light (centered 鈭?30 nm) upon excitation of 800 nm laser light were constructed. A new type of conjugated polymer with two-photon excited fluorescence (TPEF) feature, P-F8-DPSB, was used as the NIR-light harvesting component and the energy donor while a NIR fluorescent dye, DPA-PR-PDI, was used as the energy acceptor and the NIR-light emitting component for the construction of the fluorescent NPs. The hybrid NPs possess 未 value up to 2.3 脳 10⁶ GM per particle upon excitation of 800 nm pulse laser. The excellent two-photon absorption (TPA) property of the conjugated polymer component, together with its high fluorescence quantum yield (蠒) up to 45% and the efficient energy transfer from the conjugated polymer to NIR-emitting fluorophore with efficiency up to 90%, imparted the hybrid NPs with TPEF-based NIR-input-NIR-output fluorescence imaging ability with penetration depth up to 1200 渭m. The practicability of the hybrid NPs for fluorescence imaging in Hela cells was validated.