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Near-Infrared Persistent Luminescence in a Cr3+-Doped Perovskite for Low-Irradiance Imaging
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-06-03 , DOI: 10.1021/acs.chemmater.0c00807 Lijuan Huang 1, 2 , Litian Lin 2 , Wei Xie 2, 3 , Zicong Qiu 1 , Haiyong Ni 2 , Hongbin Liang 4 , Qiang Tang 4 , Liwei Cao 1 , Jian-Xin Meng 1 , Fengyu Li 1
Chemistry of Materials ( IF 7.2 ) Pub Date : 2020-06-03 , DOI: 10.1021/acs.chemmater.0c00807 Lijuan Huang 1, 2 , Litian Lin 2 , Wei Xie 2, 3 , Zicong Qiu 1 , Haiyong Ni 2 , Hongbin Liang 4 , Qiang Tang 4 , Liwei Cao 1 , Jian-Xin Meng 1 , Fengyu Li 1
Affiliation
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Near-infrared (NIR) persistent luminescence (PersL) materials are attractive multifunctional-material-platforms to real-time-required studies and applications in chemistry and biomedicine. However, the inefficient charging by low-irradiance, noncoherent, and high-tissue-penetration red–NIR light restricts their developments and applications in situ, such as long-term tracking, whole-body, and deep-tissue bioimaging. To address this issue, we develop a novel Cr3+-activated Na0.5Gd0.5TiO3 NIR-PersL material with perovskite structure. It shows over 100 times stronger PersL intensity than those of the best known Cr3+-doped phosphors, including ZnGa2O4, Zn3Ga2GeO8, Zn3Ga2Ge2O10, and LiGa5O8, with low-irradiance (∼2.5 μW·mm–2) and noncoherent red light (laser-free) charging. Based on the structural and spectroscopic studies, we reveal a novel one-photon charging mechanism in the constructed host referred binding energy (HRBE) schemes, which differs from the regular two-photon one of those Cr3+-doped gallates. The host conduction band minimum (CBM) plays a critical factor in the charging efficiency and the charging-required photon numbers. Tissue-penetration verification and in vivo bioimaging demonstrated the potentials of realizing renewed and high signal-to-noise ratio (SNR) in situ imaging with low-irradiance (∼19 μW·mm–2) and noncoherent red–NIR charging. The one-photon charging concept will contribute to the new mechanism to guide the design of the high-tissue-penetration NIR-PersL imaging probes with laser-free and low-irradiance red–NIR excitation.
中文翻译：
Cr 3+掺杂钙钛矿中的近红外持久发光用于低辐射成像
近红外（NIR）持续发光（PersL）材料是实时化学和生物医学领域研究和应用中有吸引力的多功能材料平台。但是，低辐照度，非相干性和高组织穿透性红-NIR光导致的充电效率低下，限制了它们在原位的开发和应用，例如长期跟踪，全身和深层组织成像。为了解决这个问题，我们开发了一种具有钙钛矿结构的新型Cr 3+活化Na 0.5 Gd 0.5 TiO 3 NIR-PersL材料。它显示出的PersL强度是最著名的Cr 3+掺杂磷光体（包括ZnGa 2 O）的100倍以上如图4所示，Zn 3 Ga 2 GeO 8，Zn 3 Ga 2 Ge 2 O 10和LiGa 5 O 8具有低辐照度（约2.5μW·mm –2）和非相干红光（无激光）充电。基于结构和光谱研究，我们揭示了在构造的宿主参考结合能（HRBE）方案中的一种新颖的单光子充电机理，该机理不同于那些Cr 3+掺杂的没食子酸酯中的常规两光子之一。主体导带最小值（CBM）在充电效率和需要充电的光子数中起着至关重要的作用。组织穿透验证和体内生物成像显示了在低辐照度（〜19μW·mm –2）和非相干红-NIR充电的情况下实现更新的高信噪比（SNR）原位成像的潜力。单光子充电概念将有助于这种新机制，指导具有无激光和低辐射红-NIR激发的高组织穿透性NIR-PersL成像探针的设计。
更新日期：2020-07-14
中文翻译：
Cr 3+掺杂钙钛矿中的近红外持久发光用于低辐射成像
近红外（NIR）持续发光（PersL）材料是实时化学和生物医学领域研究和应用中有吸引力的多功能材料平台。但是，低辐照度，非相干性和高组织穿透性红-NIR光导致的充电效率低下，限制了它们在原位的开发和应用，例如长期跟踪，全身和深层组织成像。为了解决这个问题，我们开发了一种具有钙钛矿结构的新型Cr 3+活化Na 0.5 Gd 0.5 TiO 3 NIR-PersL材料。它显示出的PersL强度是最著名的Cr 3+掺杂磷光体（包括ZnGa 2 O）的100倍以上如图4所示，Zn 3 Ga 2 GeO 8，Zn 3 Ga 2 Ge 2 O 10和LiGa 5 O 8具有低辐照度（约2.5μW·mm –2）和非相干红光（无激光）充电。基于结构和光谱研究，我们揭示了在构造的宿主参考结合能（HRBE）方案中的一种新颖的单光子充电机理，该机理不同于那些Cr 3+掺杂的没食子酸酯中的常规两光子之一。主体导带最小值（CBM）在充电效率和需要充电的光子数中起着至关重要的作用。组织穿透验证和体内生物成像显示了在低辐照度（〜19μW·mm –2）和非相干红-NIR充电的情况下实现更新的高信噪比（SNR）原位成像的潜力。单光子充电概念将有助于这种新机制，指导具有无激光和低辐射红-NIR激发的高组织穿透性NIR-PersL成像探针的设计。
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