Au-38(SCH2CH2Ph)(24) nanomolecules upon etching with tert-butylthiol undergo core-size conversion to green-gold Au-30(S-tBu)(18) via Au-36(SCH2CH2Ph)(24-x)(S-tBu)(x) intermediate. The structural transformation from Au38 to Au30 indicates a strong steric effect due to the tert-butyl group of the exchanging ligand in contrast to electronic effect by ligands such as thiophenol, which transforms the Au-38(SCH2CH2Ph)(24) to Au-36(S-tBu)(24). In this work, fast reaction kinetics were observed and thermodynamically stable Au-30(S-tBu)(18) was obtained in molecular purity.
Core-Size Conversion of Au38 (SCH2 CH2 Ph)24 to Au30 (S-tBu)18 Nanomolecules
Sementa Luca;Fortunelli Alessandro;
2017
Abstract
Au-38(SCH2CH2Ph)(24) nanomolecules upon etching with tert-butylthiol undergo core-size conversion to green-gold Au-30(S-tBu)(18) via Au-36(SCH2CH2Ph)(24-x)(S-tBu)(x) intermediate. The structural transformation from Au38 to Au30 indicates a strong steric effect due to the tert-butyl group of the exchanging ligand in contrast to electronic effect by ligands such as thiophenol, which transforms the Au-38(SCH2CH2Ph)(24) to Au-36(S-tBu)(24). In this work, fast reaction kinetics were observed and thermodynamically stable Au-30(S-tBu)(18) was obtained in molecular purity.File in questo prodotto:
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