Gu Wanmiao, Zhou Yue, Wang Wenying, You Qing, Fan Wentao, Zhao Yan, Bian Guoqing, Wang Runguo, Fang Liang, Yan Nan, Xia Nan, Liao Lingwen, Wu Zhikun
Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, 230031, Hefei, P. R.China.
Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, 230026, Hefei, P. R.China.
Angew Chem Int Ed Engl. 2024 Aug 5;63(32):e202407518. doi: 10.1002/anie.202407518. Epub 2024 Jul 3.
Gold nanoclusters exhibiting concomitant photothermy (PT) and photoluminescence (PL) under near-infrared (NIR) light irradiation are rarely reported, and some fundamental issues remain unresolved for such materials. Herein, we concurrently synthesized two novel rod-shaped Au nanoclusters, Au(PET) and Au(PET) (PET = 2-phenylethanethiolate), and precisely revealed that their kernels were 4 × 4 × 6 and 5 × 4 × 6 face-centered cubic (fcc) structures, respectively, based on the numbers of Au layers in the [100], [010], and [001] directions. Following the structural growth mode from Au(PET) to Au(PET), we predicted six more novel nanoclusters. The concurrent synthesis provides rational comparison of the two nanoclusters on the stability, absorption, emission and photothermy, and reveals the aspect ratio-related properties. An interesting finding is that the two nanoclusters exhibit concomitant PT and PL under 785 nm light irradiation, and the PT and PL are in balance, which was explained by the qualitative evaluation of the radiative and non-radiative rates. The ligand effects on PT and PL were also investigated.
很少有报道称金纳米团簇在近红外（NIR）光照射下同时表现出光热效应（PT）和光致发光（PL），并且对于这类材料的一些基本问题仍未得到解决。在此，我们同时合成了两种新型棒状金纳米团簇，Au(PET)和Au(PET)（PET = 2-苯乙硫醇盐），并基于[100]、[010]和[001]方向上的金层数，精确揭示了它们的内核分别为4×4×6和5×4×6面心立方（fcc）结构。按照从Au(PET)到Au(PET)的结构生长模式，我们预测了另外六种新型纳米团簇。这种同时合成提供了对这两种纳米团簇在稳定性、吸收、发射和光热效应方面的合理比较，并揭示了与纵横比相关的性质。一个有趣的发现是，这两种纳米团簇在785 nm光照射下同时表现出PT和PL，并且PT和PL处于平衡状态，这通过对辐射和非辐射速率的定性评估得到了解释。还研究了配体对PT和PL的影响。
