Fischer-Tropsch Synthesis of C-C Isoparaffins via CoMnO Nanocomposites with Suppressed CO.

The synthesis of a specific product via the Fischer-Tropsch synthesis remains challenging due to the uncontrollable coupling of CH on active sites. Isoparaffins, essential high-quality petroleum additives for improving octane numbers, are primarily derived from petroleum or natural gas. With petroleum reserves dwindling and the associated low selectivity, the direct conversion of syngas to isoparaffins has emerged as a promising alternative.

Recognition of DNA based on changes in the fluorescence intensity of CdSe/CD QDs-phenanthroline systems.

The CdSe quantum dots (QDs) modified by mercapto-beta-cyclodextrin (CD) were synthesized and characterized by transmission electron microscopy, powder X-ray diffraction, excitation and emission spectra, and fluorescence lifetime. When lambda(ex)=370nm, the fluorescence peak of CdSe/CD QDs is at 525nm. Phenanthroline (Phen) is able to quench their fluorescence, which can be recovered by the addition of DNA.