A series of fluorescent transition metal complexes bearing the 5-(dimethylamino)naphthalene-1-sulfonyl (R1) and acridone (R2) frameworks have been prepared. Reactions of the fluorescent-labeled alkyne ligands R1CH2C≡CH and R2CH2C≡CH with various metal carbonyl compounds [Co2(CO)8], [Et3NH][Fe2(CO)6(μ-CO)(μ-StBu)] and [M3(CO)10(NCMe)2] (M = Ru, Os) readily afforded new cluster complexes of the stoichiometry [Co2(CO)6(μ-η2-RCH2CCH)] (1: R = R1, 2: R2), [Fe2(CO)6(μ-StBu)(μ-η2- RCH2C=CH2)] (3: R = R1, 4: R2), [Ru3(CO)9(μ-CO)(μ3-η2- RCH2CCH)] (5: R = R1, 6: R2) and [Os3(CO)9(μ-CO)(μ3- η2-RCH2CCH)] (7: R = R1, 8: R2) in moderate to good yields. All of these new complexes have been fully characterized by FTIR, 1H NMR spectroscopy, UV/Vis spectroscopy and fast atom bombardment mass spectrometry (FABMS). The single-crystal X-ray structural analyses and molecular orbital calculations on 1, 2, 4 and 8 have been performed. It was found that all of these compounds are fluorescent in solutions at room temperature and a luminescence band characteristic of the inherent fluorophore is observed in these metal structures. However, a strong quenching of the fluorescence intensity of the chromophoric groups was observed upon coordination of metal cluster moieties.
|Number of pages||9|
|Journal||European Journal of Inorganic Chemistry|
|Publication status||Published - 2002|
Scopus Subject Areas
- Inorganic Chemistry
- Dansyl group
- Transition metal