| Autor: |
Zhao TQ; Xinjiang Key Laboratory of Novel Functional Materials Chemistry, College of Chemistry and Environmental Science, Kashi University Kashi Xinjiang 844000 China renagul111@aliyun.com., Abdurahman R; Xinjiang Key Laboratory of Novel Functional Materials Chemistry, College of Chemistry and Environmental Science, Kashi University Kashi Xinjiang 844000 China renagul111@aliyun.com., Yin XB; Institute for Frontier Medical Technology, College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science Shanghai 201620 China xbyin@nankai.edu.cn xbyin@sues.edu.cn. |
| Jazyk: |
angličtina |
| Zdroj: |
RSC advances [RSC Adv] 2024 Aug 29; Vol. 14 (38), pp. 27514-27519. Date of Electronic Publication: 2024 Aug 29 (Print Publication: 2024). |
| DOI: |
10.1039/d4ra04618h |
| Abstrakt: |
MgGa 2 O 4 (MGO) with the spinel structure exhibits abundance defects and could achieve the modulation of emission by ion doping as persistent luminescence nanoparticles (PLNPs). Here, we introduced Cr 3+ ions into MGO to achieve near-infrared (NIR) emission, and Pr 3+ ions to tune the lattice environment for enhanced NIR emission. The optimal composite, MgGa 2 O 4 : 0.005Cr 3+ , 0.003Pr 3+ (MGCP), achieved enhanced NIR emission at 709 nm under 222 nm excitation. The concentration quenching was observed due to electric dipole-quadrupole interaction at high Cr 3+ and Pr 3+ content. The afterglow mechanism was revealed, while the energy-splitting occurs from trivalent Cr 3+ ions at 650 and 709 nm, thanks to the complex lattice environment. We observed that the emission at 709 nm decreased, while the satellite signal at 650 nm increased first and then decreased intensity with increasing temperature, due to the intervalence charge transfer for Cr 3+ ions at 303-528 K. Ratiometric temperature sensing was therefore realized with superb linearity, high absolute sensitivity at 303 K for 4.18%, and accuracy at 528 K for 2.62 K, confirming with the luminescence intensity ratio at 709 and 650 nm under excitation at 222 nm. Thus, we provide a method with energy-splitting emission of Cr 3+ ions to design temperature sensing.
Competing Interests: There are no conflicts to declare.
(This journal is © The Royal Society of Chemistry.) |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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