| Zdroj: |
Baardseth Nielsen, A, Hvelplund, P & Nielsen, S B 2004, ' Ruthenium diimine complexes in unusual charge states formed in collisional electron transfer ', International Journal of Mass Spectrometry, vol. 232, no. 1, pp. 79-82 . |
| Popis: |
Ruthenium diimine complexes, Ru(L)32+ (L=bipy=2,2′-bipyridine or phen=1,10-phenanthroline), were formed in the gas phase by electrospray ionization and accelerated through a 50-kV electrostatic potential. In collisions between Ru(L)32+ and O2, fragment ions were produced in addition to Ru(L)3+ and Ru(L)33+ formed in collisional electron transfer. Cross-sections for the electron stripping and electron capture reactions are 10±0.2 A2 and 1.7±0.1 A2, respectively, for L=bipy and 3.8±0.2 A2 and 0.8±0.1 A2, respectively, for L=phen. In collisions between Ru(L)32+ and Na electron capture was the major reaction channel and resulted in Ru(L)3+ as well as Ru(L)3− (as a result of multiple-collision conditions). Cross-sections are of the order of 100 A2 for the formation of one-electron reduced Ru(L)3+ ions. The kinetic energy released by the dissociation of Ru(L)32+ and Ru(L)33+ into Ru(L)2+/2+ and L+ after collisional activation was measured to be 1.5 eV for Ru(bipy)32+, 3.7 eV for Ru(phen)32+, 8 eV for Ru(bipy)33+, and 6 eV for Ru(phen)33+. |
