Polycyclic benzimidazole derivatives, an important class of compounds in organic electronics and photovoltaics, were prepared using a solvent-free “green” process based on heating carboxylic acid anhydrides and arylene diamines in the presence of zinc acetate in the solid state. Products were isolated and purified directly by train sublimation of the crude reaction mixtures. The reaction conditions
Highly selective colorimetric fluorescence sensor for Cu2+: cation-induced ‘switching on’ of fluorescence due to excited state internal charge transfer in the red/near-infrared region of emission spectra
A 1,8-naphthalimide-based colorimetric fluorescence perinone dye, receptor 1 is reported herein for the selective detection of Cu2+ over the other heavy and transition metal ions. Receptor 1 shows a strong colorimetric change from orange to purple and a dramatic enhancement of fluorescence intensity due to cation-induced excited state internal chargetransfer during the sensing event, that is, a dual
AROMATIC AMINE DERIVATIVE AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME
申请人:MORISHITA Hironobu
公开号:US20080091025A1
公开(公告)日:2008-04-17
The present invention provides an organic electroluminescence device which can be driven at a reduced voltage, hardly causes the crystallization of a molecule, can be produced in improved yield, and has a long lifetime because of difficulty of molecular crystallization, and aromatic amine derivatives for realizing the device. The aromatic amine derivatives are novel aromatic amine derivatives having a specific structure. The organic electroluminescence device includes an organic thin film layer formed of one or more layers including at least a light emitting layer, the organic thin film layer being interposed between a cathode and an anode. In the organic electroluminescence device, at least one layer of the organic thin film layer, especially a hole transporting layer, contains the aromatic amine derivative alone or as a component of a mixture.
Understanding the influence of geometric and electronic structure on the excited state dynamical and photoredox properties of perinone chromophores
作者:Kaylee A. Wells、Jonathan R. Palmer、James E. Yarnell、Sofia Garakyaraghi、Barry C. Pemberton、Joseph M. Favale、Mary Katharine Valchar、Arnab Chakraborty、Felix N. Castellano
DOI:10.1039/d1cp03870b
日期:——
structured perinone chromophores were synthesized and photophysically characterized to elucidate the electronic and structural tunability of their excited stateproperties, including excited state redox potentials and fluorescence lifetimes/quantum yields. Despite their similar structure, these chromophoresexhibited a broad range of visible absorption properties, quantum yields, and excited state lifetimes
The reaction of phthalidylidene dichloride with primary amines. Synthesis and X-ray molecular structure of N-substituted phthalisoimides
作者:Antonio Guirado、Andrés Zapata、M. Carmen Ramírez de Arellano
DOI:10.1016/s0040-4020(97)00194-4
日期:1997.4
efficient method for the synthesis of N-substituted phthalisoimides, by reaction of phthalidylidene dichloride with primaryamines, is described. The reactions with arylamines, arylenediamines and alkylenediamines lead to the corresponding phthalisoimides or bisphthalisoimides in nearly quantitative yields. However, the reactions with alkylamines are not useful because of the relatively high nucleophilicity