Mixed lanthanide coordination polymers for temperature sensing and enhanced Nd-III NIR luminescence

【Author】 Song, Xue-Qin; Zhang, Mo; Wang, Cai-yun; Shamshooma, Ali Alhafeez Abdulrheem; Meng, Huan-Huan; Xi, Wei

【Source】JOURNAL OF LUMINESCENCE

【影响因子】4.171

【Abstract】Three Ln(III) coordination polymers, [Ln(2)L(3)(NO3)(3)](n)center dot 2CH(3)COOCH(2)CH(3) (Ln = Nd (Nd2L3), Eu (Eu2L3), Tb (Tb2L3)), following coordination-assembly reactions involving a new bi-monodentate salicylamide ligand, L = 1,4-bis[(2'-thenylaminoformyl) phenoxyl] methyl}-benzene, have been successfully synthesized. Among them, Nd2L3 and Tb2L3 were structurally authenticated by single-crystal X-ray diffraction and the results indicate both Nd2L3 and Tb2L3 are one-dimensional corrugated blockchains with Ln(III) containing 64-membered block loops filled by ethyl acetate molecules alternating in nearly orthogonal directions. For they are isomorphous, two binary co-doped lanthanide coordination polymers, Tb0.965Eu1.035L3 and Tb0.717Nd1.283L3 are obtained. Luminescent studies indicate that Tb0.965Eu1.035L3 exhibits a temperature recognition property with the significantly high sensitivity of 2.61% per K in the 296-386 K temperature range upon excitation at 345 nm as well as white emission when excited in the range of 370-390 nm. Tb0.717Nd1.283L3 shows enhanced Nd-III-centred NIR luminescence and diminished Tb-III-centred luminescence as compared to those of Nd2L3 and Tb2L3. The results presented herein show that the energy transfer from Tb-III to both Eu-III and Nd-III has been successfully achieved in Tb0.965Eu1.035L3 and Tb0.717Nd1.283L3. Generally speaking, this work explores the potential applications of lanthanide- based coordination polymers based on multi-monodentate salicylamide ligand in the area of thermal sensing.

【Keywords】Multi-monodentate salicylamide ligand; Crystal structure; Luminescent thermal sensing; Ln(III)-Ln(III) energy transfer

【发表时间】2018 SEP

【收录时间】2022-01-02

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