Fluorescent Orthopalladated Complexes of 4-Aryliden-5(4H)-oxazolones from the Kaede Protein: Synthesis and Characterization
作者:Eduardo Laga、David Dalmau、Sofía Arregui、Olga Crespo、Ana I. Jimenez、Alexandra Pop、Cristian Silvestru、Esteban P. Urriolabeitia
DOI:10.3390/molecules26051238
日期:——
was to amplify the fluorescent properties of 4-aryliden-5(4H)-oxazolones by suppression of the hula-twist non-radiative deactivation pathway. This aim was achieved by simultaneous bonding of a Pd center to the N atom of the heterocycle and the ortho carbon of the arylidene ring. Two different 4-((Z)-arylidene)-2-((E)-styryl)-5(4H)-oxazolones, the structures of which are closely related to the chromophore
Pd-Oxazolone complexes conjugated to an engineered enzyme: improving fluorescence and catalytic properties
作者:Carla Garcia-Sanz、Alicia Andreu、Blanca de las Rivas、Ana I. Jimenez、Alexandra Pop、Cristian Silvestru、Esteban P. Urriolabeitia、Jose M. Palomo
DOI:10.1039/d1ob00305d
日期:——
modified enzyme variants, one containing all the natural cysteine residues changed to serine residues, and another variant including an additional Cys mutation directly in the catalytic serine (Ser114Cys). The new Pd–enzyme conjugates were fluorescent even at ppm concentrations, while under the same conditions free Pd complexes did not show fluorescence at all. The Pd conjugation with the enzyme extremely
Fluorescence Amplification of Unsaturated Oxazolones Using Palladium: Photophysical and Computational Studies
作者:David Dalmau、Olga Crespo、Jon M. Matxain、Esteban P. Urriolabeitia
DOI:10.1021/acs.inorgchem.3c00601
日期:2023.6.26
which are among the highest values of quantum yield ever reported for organometallic Pd complexes with bidentate ligands. This means that the introduction of the Pd in the oxazolone scaffold produces in some cases an amplification of the fluorescence of several orders of magnitude from the free ligand 1 to complexes 3–6. Systematic variations of the substituents of the oxazolones and the ancillary ligands