摘要
A series of Eu/Gd-mixed metal-organic frameworks EuxGd（1-xNDC（x = 0.0005, 0.001, 0.003, 0.01;H2 NDC = 1,4-naphthalene dicarboxylic acid） utilizing back energy transfer have been developed for physiological temperature sensing. The suitable high triplet level of H2NDC allows an efficient back energy transfer from Eu3＋ions to ligands. The back energy transfer efficiency is further enhanced by the Eu3＋/Gd（3＋）-mixed strategy. As a consequence, the emission of Eu3＋dramatically weakens when temperature arises. The resultant Eu0.0005 Gd0.9995 NDC exhibits exceptional stability and good biocompatibility, and can detect physiological temperature in single-emission, dual-emission, and colorimetric models with ultra-high sensitivity.
A series of Eu/Gd-mixed metal-organic frameworks EuxGd（1-xNDC（x = 0.0005, 0.001, 0.003, 0.01;H2 NDC = 1,4-naphthalene dicarboxylic acid） utilizing back energy transfer have been developed for physiological temperature sensing. The suitable high triplet level of H2NDC allows an efficient back energy transfer from Eu3＋ions to ligands. The back energy transfer efficiency is further enhanced by the Eu3＋/Gd（3＋）-mixed strategy. As a consequence, the emission of Eu3＋dramatically weakens when temperature arises. The resultant Eu0.0005 Gd0.9995 NDC exhibits exceptional stability and good biocompatibility, and can detect physiological temperature in single-emission, dual-emission, and colorimetric models with ultra-high sensitivity.
基金
financially supported by the National Natural Science Foundation of China (Nos. 51432001, 51472217, 51632008, U1609219, and 51772268)
