1417715-50-4Relevant articles and documents
Syntheses of effectively-shielded N-heterocyclic carbene ligands
Ando, Shin,Matsunaga, Hirofumi,Ishizuka, Tadao
, p. 1687 - 1693 (2013)
A novel type of N-heterocyclic carbene ligand, with a bicyclic motif at the non-carbenic carbons of an imidazolin-2-ylidene core, has been developed. This type of ligand formed an air and moisture stable silver complex even with N,N′-dimethyl NHC. Allylic arylation with a Grignard reagent catalyzed by copper complexes of the NHC ligands proceeded preferentially at the γ-position, indicating the effective steric shielding ability of this framework.
Controlling Metallophilic Interactions in Chiral Gold(I) Double Salts towards Excitation Wavelength-Tunable Circularly Polarized Luminescence
Chang, Xiaoyong,Che, Chi-Ming,Chen, Yong,Chi, Weijie,Li, Kai,Li, Ming-De,Liu, Xiaogang,Lu, Wei,Sun, Shanshan,To, Wai-Pong,Wang, Chao,Wang, Jian,Yang, Jian-Gong,Zhang, Hong-Xing,Zou, Chao
supporting information, p. 6915 - 6922 (2020/03/19)
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.
