Mahitha M. Chiral gold clusters Au 28 , Au 38 , Au 40 , Au 102 , Au - PowerPoint PPT Presentation

Mahitha M.

Chiral gold clusters Au 28 , Au 38 , Au 40 , Au 102 , Au 133 and Au 144

Au25- 13 Ag atom doping Au38- 5 Ag atom doping

Background… …

Synthesis of Ag x Au 38−x (SCH2CH2Ph) 24 . Separation of Ag x Au 38−x (SCH2CH2Ph) 24 using HPLC. Characterization Racemization study

Racemic Au 38 (SCH2CH2Ph) 24 was synthesized by thermal etching of polydispersed Au n (SG) m nanoclusters Ag x Au 38−x (SCH2CH2Ph) 24 was synthesized by metal exchange of AgSCH2CH2Ph and Au 38 (SCH2CH2Ph) 24 .

Synthesis of Ag x Au 38−x (SCH2CH2Ph) 24 . Separation of Ag x Au 38−x (SCH2CH2Ph) 24 using HPLC. Characterization Racemization study

Synthesis of Ag x Au 38−x (SCH2CH2Ph) 24 . Separation of Ag x Au 38−x (SCH2CH2Ph) 24 using HPLC. Characterization Racemization study

Eyring analysis

Future perspective….. Intercluster reaction product of Au 25 PET 18 and Ag 25 DMBT 18 . Complexity due to both Ligand exchange and metal exchange. Metal exchange can be tried to reduce the complexity.

References Qian, H. F .; Eckenhofg, W. T.; Zhu, Y .; Pintauer, T.; Jin, R. C. T otal Structure Determination of Thiolate-Protected Au-38 Nanoparticles. J. Am. Chem. Soc. 2010, 132, 8280−8281. Zeng, C. J.; Li, T.; Das, A.; Rosi, N. L.; Jin, R. Chiral Structure ofThiolate- Preotected 28-Gold-Atom Nanocluster Determined by X-ray Crystallography. J. Am. Chem. Soc. 2013, 135, 10011−10013. Malola, S.; Lehtovaara, L.; Knoppe, S.; Hu, K. J.; Palmer, R. E.; Burgi, T.; Hakkine H. Au-40(Sr)(24) Cluster as a Chiral Dimer of 8-Electron Superatoms: Structure and Optical Properties. J. Am. Chem. Soc. 2012, 134, 19560−19563.

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