Reaction network governing diphosphine-protected gold nanocluster formation from nascent cationic platforms
Boranes
Cationic polymerization
Reducing agent
DOI:
10.1039/c2cp22865c
Publication Date:
2012-02-16T11:03:41Z
AUTHORS (2)
ABSTRACT
We identify the reaction network governing gold monolayer protected cluster (MPC) formation during reduction of Au(PPh3)Cl and L5 (L5 = 1,5-bis(diphenylphosphino)pentane) in solutions. UV-vis spectroscopy electrospray ionization mass spectrometry (ESI-MS) monitored ligated Aux: 6 ≤ x 12 clusters, which comprise intermediates final products. Initially, predominantly [Au2L52]2+ complexes form through dissolution Au(PPh3)Cl. These control nucleation reactions that nascent phosphine-ligated Au8 Au10 ionic clusters. [Au10L54]2+ is an observed growth platform for Au11 Au12 The data syntheses Au : systems evidence products (t < 3 days) are less dependent on chosen reducing agent (borane tert-butylamine complex or NaBH4); instead, after ceases, subsequent solution phase processing provides greater tuning nuclearity.
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