159749-30-1Relevant articles and documents
Synthesis and characterization of phosphorescent isomeric iridium complexes with a rigid cyclometalating ligand
Wei, Wei,Lima, Sergio A.M.,Djurovich, Peter I.,Bossi, Alberto,Whited, Matthew T.,Thompson, Mark E.
, p. 138 - 145 (2018)
The synthesis, structures and photophysical properties of three phosphorescent isomeric heteroleptic iridium complexes are reported. The complexes are bis-cyclometalated with a rigid 9-tert-butyl-pyrazolo[1,5-f]phenanthridine (tpzp) ligand. The isomers (I1, I2 and I3) of the heteroleptic complex Ir(tpzp)2pic (pic = picolinate) were isolated from reactions and characterized by 2D NMR experiments and X-ray crystallography. The tpzp ligands in isomer I1 have a trans-N,N configuration, whereas the tpzp ligands in isomers I2 and I3 both have a cis-N,N configuration, with the three coordinated nitrogens being facial in I2 and meridinal in I3. The I1 complex was found to isomerize during the sublimation under high vacuum (0.5 × 10?6 torr) at 300 °C, giving a ratio of I1:I2:I3 = 3:1:6. Reduction potentials and DFT calculations of the Ir(tpzp)2pic isomers indicate that the LUMO for these heteroleptic complexes is localized on the picolinate moiety. The Ir(tpzp)2pic isomers all display broad, featureless emission at room temperature (λem ～ 530 nm) consistent with emission from a triplet metal–ligand to ligand (Ir-tpzp to picinolate) charge transfer (3MLLCT) state. Broad 3MLLCT emission (λem ～ 520 nm) is still observed from isomers I2 and I3 in rigid media at 77 K. However, under the same conditions structured blue phosphorescence (λem = 452 nm) is observed from isomer I1, consistent with emission from a metal perturbed 3LC state on the tpzp ligand.
Compounds using phenanthridine derivative as receptor and application of compounds
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Paragraph 0072; 0073; 0074, (2019/08/12)
The invention discloses compounds using a phenanthridine derivative as a receptor and an application of the compounds in an organic electroluminescent device, and belongs to the technical field of organic electroluminescent materials. The compounds have a structural general formula represented by a formula (I) or formula (II) shown in the description, wherein Donor is an electron-donating group. The compounds using the phenanthridine derivative as the receptor provided by the invention have a donor-receptor structure, a smaller deltaEst energy value and a suitable HOMO/LUMO value, and can realize high brightness, low voltage, high efficiency and long service life of an organic electroluminescent (EL) element; and at the same time, the material prepared from the compounds has higher thermalstability, can significantly improve luminescent stability of the light-emitting device, and can be widely applied to the OLED light-emitting device and a display device as a main material of a light-emitting layer or a thermally active delayed fluorescent luminescent material for use.
1-phenyl-3-benzenemethylamido-2-propylene-1-ketone compounds and preparation method and use thereof
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Paragraph 0103; 0104; 0105, (2017/08/30)
The invention provides 1-phenyl-3-benzenemethylamido-2-propylene-1-ketone compounds and a preparation method and use thereof. The compounds are a series of compounds with brand-new structures, have a very good inhibitory effect on aggregation of A beta protein, meanwhile, can also be used for inhibiting the aggregation of Tau proteins and can be used for developing drugs for treating neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease.
