title: Synthesis of selenolate-protected Au18(SeC6H5)14 nanoclusters.
abstract: This work reports the first synthesis of selenophenolate-protected Au(18)(SePh)(14) nanoclusters. This cluster exhibits distinct differences from its thiolate analogue in terms of optical absorption properties. The Au(18)(SePh)(14) nanoclusters were obtained via a controlled reaction of Au(25)(SCH(2)CH(2)Ph)(18) with selenophenol. Electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS) revealed the crude product to contain predominantly Au(18)(SePh)(14) nanoclusters, and side products include Au(15)(SePh)(13), Au(19)(SePh)(15) and Au(20)(SePh)(16). High-performance liquid chromatography (HPLC) was employed to isolate Au(18)(SePh)(14) nanoclusters. The results of thermogravimetric analysis (TGA), elemental analysis (EA), and (1)H/(13)C NMR spectroscopy confirmed the cluster composition. To the best of our knowledge, this is the first report of selenolate-protected Au(18) nanoclusters. Future theoretical and X-ray crystallographic work will reveal the geometric structure and the nature of selenolate-gold bonding in the nanocluster.
authors.affiliation: Department of Chemistry, Anhui University, Hefei, Anhui 230039, PR China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Xu
authors.forename: Shuxin
authors.initials: S
authors.lastname: Wang
authors.forename: Zhao
authors.initials: Z
authors.lastname: Liu
authors.forename: Guoyong
authors.initials: G
authors.lastname: Xu
authors.forename: Xiangming
authors.initials: X
authors.lastname: Meng
authors.forename: Manzhou
authors.initials: M
authors.lastname: Zhu
mesh_terms: D003460:Crystallization / Q000379:methods*; D006046:Gold / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D008968:Molecular Conformation; D010316:Particle Size; D010710:Phosphates / Q000737:chemistry*; D018036:Selenium Compounds / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D010710:Phosphates; D018036:Selenium Compounds; C076818:selenophosphate; D006046:Gold