N-pivot lariat ethers with picrylamino group as a chromophore (1, 2 and 3) have been prepared by reaction of N-(4-aminoaryl)monoaza crown ethers with picryl chrolide, and the selective coloration of 1, 2 and 3 for alk...N-pivot lariat ethers with picrylamino group as a chromophore (1, 2 and 3) have been prepared by reaction of N-(4-aminoaryl)monoaza crown ethers with picryl chrolide, and the selective coloration of 1, 2 and 3 for alkali metal salts and amines has been studied by UV-Vis spectra.展开更多
The user-computer interface for color selection is of great significance for the use of colors in computer graphics, particularly in some fields where the used colors have to be selected carefully. This paper discusse...The user-computer interface for color selection is of great significance for the use of colors in computer graphics, particularly in some fields where the used colors have to be selected carefully. This paper discusses what factors have to be considered to design an effective user interface for color selec- tion. It also presents a method which shows how to represent 3D color spaces according to the psychol- ogy of color perception. Two examples of user interface for color selection are given. One is based on the CLELUV uniform color space, the other is based on RGB-rotated color model.展开更多
A new colorimetric and fluorimetric chemosensor for F detection based on 1H-imidazo[4,5-b]phenazine derivative has been designed and synthesized.It shows excellent fluorescent specific selectivity and sensitivity for ...A new colorimetric and fluorimetric chemosensor for F detection based on 1H-imidazo[4,5-b]phenazine derivative has been designed and synthesized.It shows excellent fluorescent specific selectivity and sensitivity for F^- in DMSO solution.Upon addition of F^- to the solution of probe 1,a remarkable color change from yellow to red could be observed easily by the naked-eye.The detection limit of this probe toward F^- is 6.2× 10 ^-6mol/L.Analysis by^1 H NMR proved that the imidazolyl N–H could be hydrogen-bonded with added fluoride anions,and results in the difference of colors.展开更多
文摘N-pivot lariat ethers with picrylamino group as a chromophore (1, 2 and 3) have been prepared by reaction of N-(4-aminoaryl)monoaza crown ethers with picryl chrolide, and the selective coloration of 1, 2 and 3 for alkali metal salts and amines has been studied by UV-Vis spectra.
文摘The user-computer interface for color selection is of great significance for the use of colors in computer graphics, particularly in some fields where the used colors have to be selected carefully. This paper discusses what factors have to be considered to design an effective user interface for color selec- tion. It also presents a method which shows how to represent 3D color spaces according to the psychol- ogy of color perception. Two examples of user interface for color selection are given. One is based on the CLELUV uniform color space, the other is based on RGB-rotated color model.
基金support in part by Natural Science Foundation of the Jiangsu Higher Education Institutions of China (No.13KJB150018)Natural Science Foundation of Jiangsu Province (No.BK20130926)+1 种基金Innovation program of Shanghai institute of technical physics of the Chinese Academy of Sciences (No.2013,Q-DX-36,Q-DX-37)Postgraduate Innovation Fund of Jiangsu Province (No.2013,CXZZ13_0459)
文摘A new colorimetric and fluorimetric chemosensor for F detection based on 1H-imidazo[4,5-b]phenazine derivative has been designed and synthesized.It shows excellent fluorescent specific selectivity and sensitivity for F^- in DMSO solution.Upon addition of F^- to the solution of probe 1,a remarkable color change from yellow to red could be observed easily by the naked-eye.The detection limit of this probe toward F^- is 6.2× 10 ^-6mol/L.Analysis by^1 H NMR proved that the imidazolyl N–H could be hydrogen-bonded with added fluoride anions,and results in the difference of colors.
