@article{Han2020, 
author = {Zhen Han and Xueli Zhao and Peng Peng and Si Li and Chong Zhang and Man Cao and Kai Li and Zhao-Yang Wang and Shuang-Quan Zang},
title = {Intercluster aurophilicity-driven aggregation lighting circularly polarized luminescence of chiral gold clusters},
year = {2020},
journal = {Nano Research},
volume = {13},
number = {12},
pages = {3248-3252},
keywords = {aggregation-induced emission, atomic precision, gold cluster, intercluster aurophilicity, circularly polarized luminescence},
url = {https://www.sciopen.com/article/10.1007/s12274-020-2997-0},
doi = {10.1007/s12274-020-2997-0},
abstract = {Herein, we prepared two novel pairs of enantiomeric gold cluster complexes, Au4PL4/Au4PD4 and (Au4L4)n/(Au4D4)n with atomic precision. In Au4PL4/Au4PD4, the discrete chiral Au4-based aggregation-induced emission (AIE) luminogens are separated by bulky substitutes. The corresponding aggregates are cyan-emitting with a photoluminescence quantum yield (PLQY) of 14.4%. Upon decreasing the size of the substituents, these chiral Au4 clusters are strung together by inter-cluster Au-Au interactions, which cause a low-energy green emission from the aggregated (Au4L4)n/(Au4D4)n with a much higher PLQY of 41.4% and more intense circularly polarised photoluminescence (CPL) with a dissymmetry factor |gPL| of 7.0 × 10-3. Using (Au4L4)n/(Au4D4)n, circularly polarised organic light-emitting diodes (CP-OLEDs) were for the first time fabricated with |gEL| = |gPL|. These findings signify that inter-cluster metallophilic interactions are a new and important type of driving force for AIE and crystallization-induced emission (CIE), suggesting great potential of CPL-active metal clusters in CP-OLEDs.}
}