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Absolute Quantum Yield Measurements of Near-Infrared Emission with Correction for Solvent Absorption.
Analytical Chemistry ( IF 6.7 ) Pub Date : 2019-12-10 , DOI: 10.1021/acs.analchem.9b03297 Ryosuke Hoshi 1 , Kengo Suzuki 2 , Naoya Hasebe 1 , Toshitada Yoshihara 1 , Seiji Tobita 1
Analytical Chemistry ( IF 6.7 ) Pub Date : 2019-12-10 , DOI: 10.1021/acs.analchem.9b03297 Ryosuke Hoshi 1 , Kengo Suzuki 2 , Naoya Hasebe 1 , Toshitada Yoshihara 1 , Seiji Tobita 1
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In this work, we evaluated the effect of solvent absorption during photoluminescence quantum yield (PLQY) measurements of near-infrared (NIR) emission with an integrating sphere (IS) instrument, and propose an effective correction method. Transmittance spectra of representative solvents measured with an IS instrument showed significant absorption bands in the first NIR region (NIR-I; 700-950 nm), and more prominently in the second NIR (NIR-II; 1000-1700 nm) region due to overtones and a combination of fundamental vibrations involving C-H and O-H stretching modes. The emission spectra of typical NIR-I and NIR-II emitting compounds exhibited dips owing to solvent absorption, resulting in somewhat reduced PLQY values. We utilized the transmittance spectrum of the solvent to correct the observed emission spectrum. Distortion due to solvent absorption was properly corrected, and additional corrections for the reabsorption/reemission effect gave more reliable PLQY values.
中文翻译：
校正溶剂吸收后，近红外发射的绝对量子产率测量。
在这项工作中，我们评估了使用积分球（IS）仪器在近红外（NIR）发射的光致发光量子产率（PLQY）测量期间溶剂吸收的影响，并提出了一种有效的校正方法。使用IS仪器测量的代表性溶剂的透射光谱在第一个NIR区域（NIR-I; 700-950 nm）中显示出明显的吸收带，在第二个NIR（NIR-II; 1000-1700 nm）区域中更显着泛音以及涉及CH和OH拉伸模式的基本振动的组合。由于溶剂吸收，典型的发射NIR-1和NIR-II的化合物的发射光谱会出现下降，从而导致PLQY值有所降低。我们利用溶剂的透射光谱来校正观察到的发射光谱。
更新日期：2019-12-11
中文翻译：
校正溶剂吸收后，近红外发射的绝对量子产率测量。
在这项工作中，我们评估了使用积分球（IS）仪器在近红外（NIR）发射的光致发光量子产率（PLQY）测量期间溶剂吸收的影响，并提出了一种有效的校正方法。使用IS仪器测量的代表性溶剂的透射光谱在第一个NIR区域（NIR-I; 700-950 nm）中显示出明显的吸收带，在第二个NIR（NIR-II; 1000-1700 nm）区域中更显着泛音以及涉及CH和OH拉伸模式的基本振动的组合。由于溶剂吸收，典型的发射NIR-1和NIR-II的化合物的发射光谱会出现下降，从而导致PLQY值有所降低。我们利用溶剂的透射光谱来校正观察到的发射光谱。
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