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Achieving Ultrasound-Excited Emission with Organic Mechanoluminescent Materials
Advanced Materials ( IF 27.4 ) Pub Date : 2024-07-25 , DOI: 10.1002/adma.202407875 Kai Chang 1 , Juqing Gu 1 , Likai Yuan 1 , Jianfeng Guo 1 , Xiangxi Wu 1 , Yuanyuan Fan 1 , Qiuyan Liao 1 , Guigui Ye 1 , Qianqian Li 1 , Zhen Li 1
Advanced Materials ( IF 27.4 ) Pub Date : 2024-07-25 , DOI: 10.1002/adma.202407875 Kai Chang 1 , Juqing Gu 1 , Likai Yuan 1 , Jianfeng Guo 1 , Xiangxi Wu 1 , Yuanyuan Fan 1 , Qiuyan Liao 1 , Guigui Ye 1 , Qianqian Li 1 , Zhen Li 1
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Unlike traditional photoluminescence (PL), mechanoluminescence (ML) achieved under mechanical excitation demonstrates unique characteristics such as high penetrability, spatial resolution, and signal-to-background ratio (SBR) for bioimaging applications. However, bioimaging with organic mechanoluminescent materials remains challenging because of the shallow penetration depth of ML with short emission wavelengths and the absence of a suitable mechanical force to generate ML in vivo. To resolve these issues, the present paper reports the achievement of ultrasound (US)-excited fluorescence and phosphorescence from purely organic luminogens for the first time with emission wavelengths extending to the red/NIR region, with the penetrability of the US-excited emission being considerably higher than that of PL. Consequently, US-excited subcutaneous phosphorescence imaging can be achieved using a mechanoluminescent-luminogen-based capsule device with a quantified intensity of 9.15 ± 1.32 × 104 p s−1 cm−2 sr−1 and an SBR of 24. Moreover, the US-excited emission can be adequately tuned using the packing modes of the conjugated skeletons, dipole orientation of mechanoluminescent luminogens, and strength and direction of intermolecular interactions. Overall, this study innovatively expands the kind of excitation sources and the emission wavelengths of organic mechanoluminescent materials, paving the way for practical biological applications based on US-excited emission.
中文翻译：
利用有机机械发光材料实现超声激发发射
与传统的光致发光（PL）不同，机械激励下实现的机械发光（ML）表现出独特的特性，例如用于生物成像应用的高穿透性、空间分辨率和信号背景比（SBR）。然而，有机机械发光材料的生物成像仍然具有挑战性，因为发射波长短的 ML 穿透深度较浅，并且缺乏合适的机械力在体内产生 ML。为了解决这些问题，本文首次报道了纯有机发光体的超声（US）激发荧光和磷光，发射波长延伸至红色/近红外区域，US激发发射的穿透性为明显高于PL。因此，使用基于机械发光的发光体胶囊装置可以实现US激发的皮下磷光成像，其量化强度为9.15 ± 1.32 × 10 4 ps -1 cm -2 sr -1和SBR为24。可以使用共轭骨架的堆积模式、机械发光发光体的偶极取向以及分子间相互作用的强度和方向来充分调节激发发射。总体而言，这项研究创新性地扩展了有机机械力发光材料的激发源种类和发射波长，为基于US激发发射的实际生物应用铺平了道路。
更新日期：2024-07-25
中文翻译：
利用有机机械发光材料实现超声激发发射
与传统的光致发光（PL）不同，机械激励下实现的机械发光（ML）表现出独特的特性，例如用于生物成像应用的高穿透性、空间分辨率和信号背景比（SBR）。然而，有机机械发光材料的生物成像仍然具有挑战性，因为发射波长短的 ML 穿透深度较浅，并且缺乏合适的机械力在体内产生 ML。为了解决这些问题，本文首次报道了纯有机发光体的超声（US）激发荧光和磷光，发射波长延伸至红色/近红外区域，US激发发射的穿透性为明显高于PL。因此，使用基于机械发光的发光体胶囊装置可以实现US激发的皮下磷光成像，其量化强度为9.15 ± 1.32 × 10 4 ps -1 cm -2 sr -1和SBR为24。可以使用共轭骨架的堆积模式、机械发光发光体的偶极取向以及分子间相互作用的强度和方向来充分调节激发发射。总体而言，这项研究创新性地扩展了有机机械力发光材料的激发源种类和发射波长，为基于US激发发射的实际生物应用铺平了道路。
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