220665-71-4Relevant articles and documents
Molecular Motions in AIEgen Crystals: Turning on Photoluminescence by Force-Induced Filament Sliding
Zhang, Jing,He, Benzhao,Wu, Wenjie,Alam, Parvej,Zhang, Han,Gong, Junyi,Song, Fengyan,Wang, Zaiyu,Sung, Herman H. Y.,Williams, Ian D.,Wang, Zhiming,Lam, Jacky W. Y.,Tang, Ben Zhong
, p. 14608 - 14618 (2020)
Life process is amazing, and it proceeds against the eternal law of entropy increase through molecular motion and takes energy from the environment to build high-order complexity from chaos to achieve evolution with more sophisticated architectures. Inspired from the elegance of life process and also to effectively exploit the undeveloped solid-state molecular motion, two unique chiral Au(I) complexes were elaborately developed in this study, in which their powders could realize a dramatic transformation from nonemissive isolated crystallites to emissive well-defined microcrystals under the stimulation of mechanical force. Such an unusual crystallization was presumed to be caused by molecular motions driven by the formation of strong aurophilic interactions as well as multiple C-H···F and π-πinteractions. Such a prominent macroscopic off/on luminescent switching could also be achieved through extremely subtle molecular motions in the crystal state and presented a filament sliding that occurred in a layer-by-layer molecular stacking fashion with no involvement of any crystal phase transition. Additionally, it had been demonstrated that the manipulation of the solid-state molecular motions could result in the generation of circularly polarized luminescence.
Chiral Au (I) complex with AIE activity as well as synthesis method and application of chiral Au (I) complex
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Paragraph 0044, (2021/10/13)
The invention develops two unique chiral Au (I) complexes. By observing the opening phenomenon of photoluminescence, the rapid transformation process of the powder form from disordered microcrystals to clearly defined microcrystals under the stimulation of simple mechanical force can be visually observed. The abnormal crystallization process is considered to be caused by molecular movement, and the molecular movement caused by the abnormal crystallization process is formed by strong gold affinity interaction and a plurality of C-H... F and pi-pi interactions. In addition, the obvious and macroscopic on/off light-emitting switching can also be realized through extremely fine molecular movement in the crystal. This is primarily manifested by muscle-like filament gliding occurring in layer-by-layer molecular stacks, and does not involve any crystalline phase change. On the other hand, as an additional application, it has been proved that output of circularly polarized light can be achieved by adjusting movement of solid molecules.
Synthesis of phosphoramides for the lewis base-catalyzed allylation and aldol addition reactions
Denmark, Scott E.,Su, Xiping,Nishigaichi, Yutaka,Coe, Diane M.,Wong, Ken-Tsung,Winter, Stephen B. D.,Choi, Jun Young
, p. 1958 - 1967 (2007/10/03)
Both chiral and achiral phosphoramides of diverse structure were prepared from diamines by the coupling to phosphorus(V) or phosphorus(III) reagents. Several enantiopure 1,2-diphenyl-1,2-ethanediamine analogues have been prepared by the reductive coupling of the corresponding N-silylimine with NbCl4(THF)2 and subsequent resolution by the formation of diastereomeric menthyl carbamates. (S,S)-N,N'-Di-(1-naphthyl)-1,2-diphenyl- 1,2-ethanediamine 15 was prepared by the arylation of (S,S)-1,2-diphenyl- 1,2-ethanediamine with naphthyl iodide.
