Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 1245-13-2, molcular formula is C20H12N2O4, introducing its new discovery. Formula: C20H12N2O4
Water-soluble copper(i) complexes bearing 2,2?-bicinchoninic acid dipotassium salt with red-light absorption and repeatable colour change upon freezing operation
We newly synthesized a copper(i) complex bearing a 2,2?-bicinchoninic acid dipotassium salt (biq(COOK)2) ligand and characterized the complex by elemental analysis, NMR and UV-vis spectroscopy, and electrochemistry with the help of comparative compounds. The complex in water shows intense absorption in the red light region due to metal to ligand charge transfer. The wavelength value at the absorption maximum of the charge transfer, lambdaabs_max, is 556 nm, and the value of the molar extinction coefficient, epsilon, at the shoulder of the absorption at 670 nm is 1 ¡Á 103 M?1 cm?1. The water solution is purple, and the frozen one is green. The colour change is repeatable. The colour change is not observed when DMSO and ethanol are used. The UV-vis spectra related to absorption using an integrated sphere of the water solution and a frozen one show the repeatable colour change.
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Reference£º
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI