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Fig. 17 Combination of solution phase synthesis, ESI and multistage mass spectrometry experi-
ments for the gas-phase 'synthesis' of gold cluster ions: (a) condensed phase clusters transferred to
the gas phase and (b) fragmentation (via CID, SORI-CID, ECD, EID, PID, etc.) produces new
cluster ions
ions (Fig.
17
), whose reactivity can be examined using instruments with multistage
mass spectrometry (MS
n
) capabilities. Several examples where this approach has
been adopted are discussed later in Sect.
3.1
.
As discussed further in Sect.
3.1
, fragmentation of a gas-phase cluster ion can be
induced in several ways. The subsequent fragmentation of the activated mass-
selected precursor ion can occur via three general channels:
