Reference of 387827-64-7, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.387827-64-7, Name is 2-(2,4-Difluorophenyl)-5-(trifluoromethyl)pyridine, molecular formula is C12H6F5N. In a Article，once mentioned of 387827-64-7
Four novel cycloplatinated(II) complexes, Pt(ppy)(acac-C6H4I-4) (1), Pt(ppy)(acac-C6H4 t-Bu-4) (2), Pt[dF(CF3)ppy](acac-C6H4I-4) (3) and Pt[dF(CF3)ppy](acac-C6H4 t-Bu-4) (4) based on either 2-phenylpyridine (ppy) or 2-(2,4-difluorophenyl)-5-(trifluoromethyl)pyridine [dF(CF3)ppy] ligands were synthesized and characterized. Complex 4 has two isomers with different color and luminescence. Yellow-green 4G emits a green luminescence whereas orange 4O exhibits red luminescence. Complexes 1, 2 and 4G display mechanoluminescence with the luminescence red-shift in a range of ca. 94?135 nm. Whereas 3 and 4O exhibit no response to mechanical grinding. Systematic studies on crystal structure, TGA, luminescence spectra, and PXRD demonstrate that the mechanoluminescence of 1 and 2 is due to the formation of pi-pi interactions, whereas, the mechanism for 4G is the destruction of F?F interactions during mechanical grinding. All complexes exhibit concentration-dependent luminescence switching behaviour in CHCl3 solution. Extremely large red-shifts of their luminescence spectra suggest the formation of aggregates via Pt?Pt interaction in high concentration solutions. Moreover, 4O don’t respond to ethanol vapor, but its ground species can be converted to 4G upon exposure to ethanol vapor. Based on this unique property, a simple device was developed using 4O as starting material and successfully demonstrated potential for data security storage.
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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI