An Iridium Complex as Bidentate Halogen Bond-Based Anion Receptor Featuring an IncreasedOptical Response

IF 2.5 4区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

ChemistryOpen Pub Date : 2024-04-10 DOI:10.1002/open.202300183

Robin Kampes, Avinash Chettri, Dr. Maria Sittig, Guangjun Yang, Dr. Stefan Zechel, Dr. Stephan Kupfer, Dr. Martin D. Hager, Prof. Dr. Benjamin Dietzek-Ivanšić, Prof. Dr. Ulrich S. Schubert

引用次数: 0

Abstract

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)₂ 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 1.6×10⁵ M⁻¹. 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.

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作为双齿卤素键阴离子受体的铱络合物具有更强的光学响应能力

我们展示了一种发光铱（III）配合物，其特点是具有一个能与阴离子强结合的双叉卤素键供体位点。与之前基于 Ir(III) 的化学传感器（2.5%）相比，量身定制的 Ir(III)(L)2 分子的发射量子产率（8.4%）显著提高。利用发射滴定法证明了氯化物、溴化物和醋酸盐的成功结合。这些实验揭示了高达 1.6×105 M-1 的结合常数。此外，还首次采用了一种利用发射位移来评估结合常数的新方法。量子化学模拟支持实验观察到的特征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ChemistryOpen CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

4.80

自引率

4.30%

发文量

143

审稿时长

1 months

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