Electric Literature of 448-61-3, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.448-61-3, Name is 2,4,6-Triphenylpyrylium tetrafluoroborate, molecular formula is C23H17BF4O. In a Article，once mentioned of 448-61-3
Synthesis, negative solvatochromism (Table 1, Figure 1), and negative halochromism (Tables 2-3, Figures 2-3) of the new crown ether-substituted pyridinium N-phenolate betaine dyes 3-6 are described.In contrast to other known chromoionophores, 3-5 exhibit a cation-selective negative halochromism, which manifests itself as a hypsochromic shift of the longwavelength intramolecular charge-transfer (CT) absorption band of the betaine chromophore on addition of salts.As this CT absorption band lies within the visible spectral region, the cation-induced colour change can be followed easily by eye, which suggests an application of these new chromoionophoric betaine dyes as cation indicators.The halochromism of 3-6 constitutes a new type of true halochromism, in contrast to the trivial halochromism first defined by Bayer and Villiger in 1902. Key Words: Chromoionophores / Crown ethers / Betaine dyes / ET(30) values / Halochromism / Pyridinium N-phenoxide betaine dyes / Solvatochromism / Solvent polarity
The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 448-61-3 is helpful to your research. Reference of 448-61-3
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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI