Journal of Materials Chemistry C p. 15136 - 15140 (2019)
Update date:2022-08-11
Topics:
Liao, Wei-Ming
Li, Xiang-Nan
Zeng, Qi
Zhong, Yuan-Hui
Yin, Ye-Gao
He, Jun
Solvothermal reaction between CuI and 5-(3-pyridyl)tetrazole (HPTA) in CH3CN and NH3·H2O/n-BuOH, afforded two kinds of Cu7I4 cluster-based coordination polymers 1 and 2, respectively. 1 is a racemic conglomerate of enantiomers crystallizing in the P6322 space group and 2 is a mesomer crystallizing in the P3c1 group. Both 1 and 2 show dual-channel emissions in which low-energy emission originates from a cluster-centered (CC) excited state while high-energy emission is attributed to an iodide-to-ligand charge transfer (XLCT)/metal-to-ligand charge transfer (MLCT) excited state. Of particular interest, 2 exhibits thermochromic luminescence originating from the combined effects of non-radiative transition and thermal deactivation of the XLCT excited state.
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