Controlling Metallophilic Interactions in Chiral Gold(I) Double Salts towards Excitation Wavelength‐Tunable Circularly Polarized Luminescence

Autor:	Yong Chen, Chi-Ming Che, Shanshan Sun, Hong-Xing Zhang, Weijie Chi, Wai-Pong To, Xiaoyong Chang, Xiaogang Liu, Chao Wang, Kai Li, Jian-Gong Yang, Ming-De Li, Wei Lu, Jian Wang, Chao Zou
Rok vydání:	2020
Předmět:	Steric effects Materials science Photoluminescence 010405 organic chemistry Doping General Chemistry General Medicine 010402 general chemistry Photochemistry 01 natural sciences Aurophilicity Catalysis 0104 chemical sciences Excited state Ground state Luminescence Excitation
Zdroj:	Angewandte Chemie. 132:6982-6989
ISSN:	1521-3757 0044-8249
Popis:	Materials exhibiting excitation wavelength-dependent photoluminescence (Ex-De PL) in the visible region have potential applications in bioimaging, optoelectronics and anti-counterfeiting. Two multifunctional, chiral [Au(NHC)2 ][Au(CN)2 ] (NHC=(4R,5R)/(4S,5S)-1,3-dimethyl-4,5-diphenyl-4,5-dihydro-imidazolin-2-ylidene) complex double salts display Ex-De circularly polarized luminescence (CPL) in doped polymer films and in ground powder. Emission maxima can be dynamically tuned from 440 to 530 nm by changing the excitation wavelength. The continuously tunable photoluminescence is proposed to originate from multiple emissive excited states as a result of the existence of varied AuI ⋅⋅⋅AuI distances in ground state. The steric properties of the NHC ligand are crucial to the tuning of AuI ⋅⋅⋅AuI distances. An anti-counterfeiting application using these two salts is demonstrated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc9ebf0731f963439411f5dac31673a9 https://doi.org/10.1002/ange.202000792 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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