Chemistry Reference
In-Depth Information
Fig. 14 Time resolved ESI-MS for nanocluster synthesis from solutions containing [L
6
]/
[PPh
3
] ¼ 1. The sequence shows that [Au
9
L
6
4
Cl]
2+
cluster growth is preceded by the formation
of monodisperse [Au
8
L
6
4
]
2+
clusters through degradation of larger clusters. Figure reproduced
from [
142
]
Fig. 15 X-ray crystal structures of the cations of [Au
6
(dppp)
4
](NO
3
)
2
(1) and [Au
8
(dppp)
4
Cl
2
]
(PF
6
)
2
(2). dppp
¼
1,3-Bis(diphenylphosphino)propane. Hydrogen atoms omitted for clarity.
Figure reproduced from [
159
]
Kamei et al. [
159
] used ESI-MS to monitor the reactions of two AuNCs
[Au
6
(dppp)
4
](NO
3
)
2
((1)inFig.
15
)[
102
]and[Au
9
(PPh
3
)
8
](NO
3
)
2
[
160
]. ESI-MS
revealed that [Au
6
(dppp)
4
]
2+
(Fig.
16a
) transforms to monodisperse
[Au
8
(dppp)
4
Cl
2
]
2+
upon treatment with 20 equiv. of ClAuPPh
3
. The subsequent
addition of an alcoholic solution of NaPF
6
resulted in the precipitation of crude
[Au
8
(dppp)
4
Cl
2
](PF
6
)
2
which was recrystallised in dichloromethane to yield crys-
tals suitable for X-ray crystallography ((2) in Fig.
15
). ESI-MS was also used to
