866526-26-3Relevant academic research and scientific papers
Clickable azide-functionalized bromoarylaldehydes – synthesis and photophysical characterization
Friedrich, Marius,G?bel, Dominik,Lork, Enno,Nachtsheim, Boris J.
supporting information, p. 1683 - 1692 (2021/06/25)
Herein, we present a facile synthesis of three azide-functionalized fluorophores and their covalent attachment as triazoles in Huisgen-type cycloadditions with model alkynes. Besides two ortho- and para-bromo-substituted benzaldehydes, the azide functionalization of a fluorene-based structure will be presented. The copper(I)-catalyzed azide–alkyne cycloaddition (CuAAC) of the so-synthesized azide-functionalized bromocarbaldehydes with terminal alkynes, exhibiting different degrees of steric demand, was performed in high efficiency. Finally, we investigated the photophysical properties of the azide-functionalized arenes and their covalently linked triazole derivatives to gain deeper insight towards the effect of these covalent linkers on the emission behavior.
Nickel(II) complexes bearing phosphinooxazoline ligands: Synthesis, structures and their ethylene oligomerization behaviors
Tang, Xiubo,Zhang, Dongheng,Jie, Suyun,Sun, Wen-Hua,Chen, Jiutong
, p. 3918 - 3928 (2007/10/03)
A series of Ni(II) complexes 4a-f ligated by the unsymmetrical phosphino-oxazolines (PHOX) were synthesized and characterized by elemental analysis and IR spectroscopy, and the structures of complexes 4c-4e were confirmed by the X-ray crystallographic analysis. All derivatives showed distorted tetrahedron geometry by the nickel center and coordinative atoms. Upon activation with methylaluminoxane (MAO) or Et2AlCl, these complexes exhibited considerable to high activity of ethylene oligomerization. The ligands environments and reaction conditions significantly affect their catalytic activities, while the highest oligomerization activity (up to 1.18 × 106 g ? mol-1(Ni) ? h-1) was observed for 4d at 20 atm of ethylene. Incorporation of 2-4 equivalents of PPh 3 as auxiliary ligands in the 4a-f/MAO catalytic systems led to higher activity and longer catalytic lifetime.
