Two series of cationic dyes, named DM-n and DP-n, were encapsulated in three anionic isostructural MOFs with a 1D channel. Ordered arrangement of the dyes in the channel was investigated by using the microscope polarized absorption spectra of different dye and MOF composites. Furthermore, the tunable secondordernonlinearopticalproperties of these MOF⊃dye materials were observed.
Subtle Ligand Effects in Oxidative Photocatalysis with Iridium Complexes: Application to Photopolymerization
作者:Jacques Lalevée、Mathieu Peter、Frédéric Dumur、Didier Gigmes、Nicolas Blanchard、Mohamad-Ali Tehfe、Fabrice Morlet-Savary、Jean Pierre Fouassier
DOI:10.1002/chem.201101445
日期:2011.12.23
Iridium(III) complexes were designed and evaluated as efficient photoinitiators of polymerization reactions in combination with iodonium salts and silanes. Mechanistically, these reactions were shown to proceed through oxidative photoredox catalysis, generating aryl and silyl radicals under very soft irradiation conditions (blue LED, xenon lamp, and even sunlight). These radicals can initiate the free
A Dual-Response Fluorescent Probe for the Detection of Viscosity and H<sub>2</sub>S and Its Application in Studying Their Cross-Talk Influence in Mitochondria
作者:Song-Jiao Li、Yong-Fei Li、Hong-Wen Liu、Dong-Ye Zhou、Wen-Li Jiang、Juan Ou-Yang、Chun-Yan Li
DOI:10.1021/acs.analchem.8b02068
日期:2018.8.7
our best knowledge, no fluorescentprobe is found for dual detection of mitochondrial viscosity and H2S. Herein, a dual-responsefluorescentprobe (Mito-VS) is designed and synthesized to monitor the level of viscosity and H2S, respectively. Mito-VS itself is nonfluorescent due to a free intramolecular rotation between dimethylaniline and pyridine. After the increase of viscosity, the rotation is prohibited
maxima below 400 nm and their determination using absorption and colour change requires probes with absorption beyond this region. Herein, we report a stilbazolium-based probe DMAS-DP, which undergoes aggregation in HEPES buffer with an absorption maximum at 475 nm (red colour) and these aggregates demonstrate a highly selective and sensitive change in their colour from red to light yellow with 2,4,6-trinitrophenol
Enhanced Fluorescence of Loosely Packed Dye Aggregates
作者:Naoya Ryu、Hiroshi Hachisako
DOI:10.1246/cl.140962
日期:2015.2.5
The fluorescence of a hemicyanine dye was considerably enhanced by the formation of loosely packed aggregates, compared to tightly aggregated and molecularly dispersed hemicyanine dyes. Loose dye aggregates were realized by introducing a self-assembling unit to the dye molecules and by adjusting the mixture of good solvent and nonsolvent for the dye moiety.