From a blue to white to yellow emitter: A hexanuclear copper iodide nanocluster

Ke Xu, Bu Lin Chen, Rui Zhang, Li Liu, Xin Xin Zhong, Lei Wang, Feng Yan Li, Guang Hua Li, Khalid A. Alamry, Fa Bao Li, Wai Yeung Wong, Hai Mei Qin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)


Highly emissive copper(i) halide nanoclusters showing thermally activated delayed fluorescence (TADF) have been paid much attention, but rarely reported so far. Herein, a hexanuclear copper(i) iodide cluster containing a tridentate N?P?N ligand, [Cu6I6(ppda)2] {ppda = 2-[2-(dimethylamino)phenyl(phenyl)phosphino]-N,N-dimethylaniline}, was synthesized. All six copper atoms are four-coordinate, including four CuPNI2and two CuI4units. This complex exhibits intense white emission in the powder state at room temperature and shows a peak at a wavelength of 535 nm (FPL= 0.36) with a microsecond lifetime (t= 4.4 µs). Emission colors can be largely tuned from blue to white to yellow, from the crystal to powder to film state at 297 K. The emission of [Cu6I6(ppda)2] originates from a combination of MLCT and XLCT transitions. This complex showed good thermal stability. A solution-processed, nondoped device of complex [Cu6I6(ppda)2] exhibits stable yellow emission with the CIE coordinates (x,y) of (0.43, 0.51). [Cu6I6(ppda)2] also shows reasonable photocatalytic H2evolution activity under visible-light irradiation.

Original languageEnglish
Pages (from-to)5859-5868
Number of pages10
JournalDalton Transactions
Issue number18
Publication statusPublished - 14 May 2020

ASJC Scopus subject areas

  • Inorganic Chemistry


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