Kampes Robin, Chettri Avinash, Sittig Maria, Yang Guangjun, Zechel Stefan, Kupfer Stephan, Hager Martin D, Dietzek-Ivanšić Benjamin, Schubert Ulrich S
Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstraße 10, 07743, Jena, Germany.
Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany.
ChemistryOpen. 2024 May;13(5):e202300183. doi: 10.1002/open.202300183. Epub 2024 Apr 10.
We present a luminescent Ir(III) complex featuring a bidentate halogen bond donor site capable of strong anion binding. The tailor-made Ir(III)(L) moiety offers a significantly higher emission quantum yield (8.4 %) compared to previous Ir(III)-based chemo-sensors (2.5 %). The successful binding of chloride, bromide and acetate is demonstrated using emission titrations. These experiments reveal association constants of up to 1.6×10 M. Furthermore, a new approach to evaluate the association constant by utilizing the shift of the emission was used for the first time. The experimentally observed characteristics are supported by quantum chemical simulations.
我们展示了一种具有双齿卤素键供体位点的发光铱（III）配合物，该位点能够与阴离子进行强结合。与之前的基于铱（III）的化学传感器（2.5%）相比，定制的铱（III）（L）部分具有显著更高的发射量子产率（8.4%）。通过发射滴定法证明了氯、溴和醋酸根的成功结合。这些实验揭示了高达1.6×10 M的缔合常数。此外，首次使用了一种通过利用发射峰的位移来评估缔合常数的新方法。量子化学模拟支持了实验观察到的特性。
