Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China; Institute of Medical Research, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, Shaanxi 710072, China; Northwestern Polytechnical University Chongqing Technology Innovation Center, Chongqing 400000, China.
Institute of Medical Research, Northwestern Polytechnical University, 127 West Youyi Road, Xi'an, Shaanxi 710072, China; Northwestern Polytechnical University Chongqing Technology Innovation Center, Chongqing 400000, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Dec 5;282:121658. doi: 10.1016/j.saa.2022.121658. Epub 2022 Jul 25.
Boron trifluoride (BF) is a potential environmental pollutant, and excess exposure to it may cause human diseases. However, the sensitive, rapid and accurate detection of BF for on-site purposes is still a challenge. In this work, we developed the first NIR iridium(III)-based probe with dual emission and a Stokes shift of 370 nm for self-calibrated and luminogenic detection of BF. This probe exhibited a strong luminescence enhancement at around 650 nm to BF (0-100 μM) with almost no change in luminescence at 475 nm, displaying a 220-fold I/I enhancement at 100 μM of BF with a detection limit of 0.35 μM. Moreover, the probe showed a fast response time of less than 5 s to BF along with an obvious color change under UV irradiation for visual detection. Importantly, the desirable photophysical properties of the iridium(III)-based probe can be harnessed for time-resolved detection of BF in the presence of the fluorescence background. The applicability of the probe was further verified in an organic solvent waste-spiked system and on a glass pane. This work will provide a solid basis for the development of sensitive and on-site BF sensing toolkits for environmental monitoring.
三氟化硼（BF）是一种潜在的环境污染物，过量接触可能导致人类疾病。然而，对于现场目的，灵敏、快速和准确地检测 BF 仍然是一个挑战。在这项工作中，我们开发了第一个具有双发射和 370nm 斯托克斯位移的近红外铱（III）基探针，用于 BF 的自校准和发光明检测。该探针对 BF（0-100μM）表现出强烈的荧光增强，在 475nm 处几乎没有荧光变化，在 100μM 的 BF 下，I/I 增强达到 220 倍，检测限为 0.35μM。此外，该探针对 BF 具有快速的响应时间，不到 5s，并且在紫外光照射下有明显的颜色变化，可用于目视检测。重要的是，该基于铱（III）的探针的理想光物理性质可用于在荧光背景存在下进行 BF 的时间分辨检测。探针的适用性在有机溶剂废物污染系统和玻璃平板上得到了进一步验证。这项工作将为开发用于环境监测的灵敏现场 BF 传感工具包提供坚实的基础。
