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1,869 results on '"Xu, Jing‐Juan"'

115. Trace Ir(III) complex enhanced electrochemiluminescence of AIE-active Pdots in aqueous media

Author

Gao, Hang, Zhang, Nan, Li, Yang, Zhao, Wei, Quan, Yiwu, Cheng, Yixiang, Chen, Hong-Yuan, and Xu, Jing-Juan

Abstract

Trace Ir(III) complex enhanced aggregation-induced electrochemiluminescence (AIECL) of poly-tetraphenylethene (pTPE) in aqueous media was investigated for the first time. The poly-TPE end-capped by Ir(III) complex (Ir@pTPE) and its corresponding model polymer poly-TPE (Ph@pTPE) could be synthesized by Suzuki coupling polymerization reaction of 1,2-bis(4-bromophenyl)- 1,2-diphenylethene (M-1) with 1,2-diphenyl-1,2-bis(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethene (M-2) and the continuous Suzuki coupling end-capped reaction of poly-TPE-pinacol boronate with (pq)2Ir(pico)Br and bromobenzene, respectively. Subsequently, the corresponding Ir@pTPE Pdots and Ph@pTPE Pdots encapsulated with poly(styrene- co-maleicanhydride) (PSMA) could be obtained by nanoprecipitation method. Compared with Ph@pTPE Pdots, the Ir@pTPE Pdots with a trace amount of Ir(III) complex (1.34‰ of Ir(III) content, wt) could exhibit 9.9-fold enhancement of the electrochemiluminescence (ECL) signal for visual emission. This work provided a novel strategy on designing highly efficient ECL materials based on trace Ir(III)-end capping AIE-active polymer dots. electrochemiluminescence, aggregation-induced emission, Ir(III) complex, polymer dots

Published
2024
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117. Interface Engineering of Copper Nanocluster Assemblies with White‐Light Emission.

Author

Wang, Zhong‐Xia, Gao, Hang, Li, Xiao‐Qiong, Jia, Yi‐Lei, Wang, Ting, Cheng, Qiu‐Yue, Kang, Bin, Chen, Hong‐Yuan, and Xu, Jing‐Juan

Subjects
SURFACE chemistry, DENSITY functional theory, MASS spectrometry, COPPER
Abstract

Construction of white‐light emitters is of great importance in practical applications but is challenging for metal nanoclusters. Herein, arginine (Arg)‐mediated copper nanoclusters (Cu NCs) assemblies with white‐light emission (WLE) are reported for the first time. The multidentate ligand, Arg, not only effectively tailors the high stability and locally‐excited emission (LES) of aqueous phase Cu NCs, but also bridges 1‐naphthalenol methylcarbamate (NMC) to generate a blue emitter via through‐space interactions (TSIs), resulting in a stable mixed light. Density functional theory calculation and mass spectrum further confirm that Arg can allow for the formation of strong hydrogen‐bonds with the ligand 2,4‐diaminotoluene of Cu NCs, and formation of TSIs‐based complexes with NMC. More importantly, pure white‐light emission (WLE) with Commission Internationale de L'Eclairagecoordination (0.30, 0.31) is observed by regulating the ratio between Arg and the interfacial ligand of NMC. The findings not only provide a new perspective for the construction of WLE emitters via interface modification chemistry but also open a window to gain insight into the mechanism of interface engineering. [ABSTRACT FROM AUTHOR]

Published
2023
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