Dual phosphorescent emissions from conformers of iridium complex rotors†

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2024-10-11 DOI:10.1039/D4DT02321H

Yu-Ting Hsu, Chandni Bhagani, Juan A. Aguilar, Mark A. Fox, Dmitry Yufit, Ross J. Davidson and Andrew Beeby

引用次数: 0

Abstract

The chiral iridium rotors Ir(ppy)₂(pyX)Cl (X = CC–SiR₃, R = alkyl) remarkably contain two distinct rotational conformers in the ground (S₀) and excited (T₁) states that can be detected by NMR and emission measurements respectively at variable temperatures. The observed phosphorescent emissions, vibronic (involving L = ppy) and broad (L = pyX), arise from different triplet ligand to metal charge transfers from the two rotational conformers at distinct ³MLCT excited states. Both conformers exist in these Ir(ppy)₂(pyX)Cl rotors due to the electron-withdrawing, conjugated substituent X.

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铱络合物转子构象的双磷光发射。

手性铱转子 Ir(ppy)2(pyX)Cl（X = CC-SiR3，R = 烷基）在基态（S0）和激发态（T1）中明显包含两种不同的旋转构象，可在不同温度下分别通过核磁共振和发射测量进行检测。在不同的 3MLCT 激发态下，观察到的磷光发射，即振子发射（涉及 L = ppy）和宽发射（L = pyX），是由两个旋转构象的不同三重配体到金属的电荷转移引起的。这两种构象都存在于 Ir(ppy)2(pyX)Cl 转子中，原因是共轭取代基 X 具有电子吸收性。

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

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.