阳离子聚合
量子产额
材料科学
荧光
水溶液
纳米颗粒
发光
镧系元素
两亲性
聚合物
低临界溶液温度
光化学
纳米技术
化学工程
共聚物
离子
高分子化学
物理化学
化学
有机化学
光电子学
工程类
复合材料
物理
量子力学
作者
Weixu Feng,Yujuan Huang,Yan Zhao,Wei Tian,Hongxia Yan
标识
DOI:10.1021/acsami.3c00478
摘要
Lanthanide-based (Ln3+) luminescent materials are ideal candidates for use in fluorescence intracellular temperature sensing. However, it remains a great challenge to obtain a Ln3+-ratiometric fluorescence thermometer with high sensitivity and quantum yield in an aqueous environment. Herein, a cationic Eu3+-metallopolymer was synthesized via the coordination of Eu(TTA)3·2H2O with an AIE active amphipathic polymer backbone that contains APTMA ((3-acrylamidopropyl) trimethylammonium) and NIPAM (N-isopropylacrylamide) units, which can self-assemble into nanoparticles in water solution with APTMA and NIPAM as the hydrophilic shell. This polymer exhibited highly efficient dual-emissive white-light emission (Φ = 34.3%). Particularly, when the temperature rises, the NIPAM units will transform from hydrophilic to hydrophobic in the spherical core of the nanoparticle, while the VTPE units are moved from inside the nanoparticle to the shell, activating its nonradiative transition channel and thereby decreasing its energy transfer to Eu3+ centers, endowing the Eu3+-metallopolymer with an extremely high temperature sensing sensitivity within the physiological temperature range. Finally, the real-time monitoring of the intracellular temperature variation is further conducted.
科研通智能强力驱动
Strongly Powered by AbleSci AI