| Attributs | Valeurs |
|---|
| type
| |
| Is Part Of
| |
| Subject
| |
| Title
| - Synthesis of Mixed Monolayer-Protected Gold Clustersfrom Thiol Mixtures: Variation in the Tail Group, ChainLength, and Solvent
|
| has manifestation of work
| |
| related by
| |
| Author
| |
| Abstract
| - We present a systematic study on the synthesis of mixed monolayer-protected clusters (MMPCs) frommixtures of alkanethiols. Our results show that solvation-driven thermodynamic preferential adsorptionof precursor ligands governs monolayer composition of MMPCs. In the mixed system HO(CH2)nSH/CH3(CH2)mSH (n = m or n ≠ m) in toluene, adsorption of the polar component is largely favored becauseof the poorer solvation of polar tail groups in toluene compared to tetrahydrofuran (THF). When MMPCsare generated from the mixed system HO(CH2)nSH/CH3(CH2)mSH (n = m) in THF, the tail group effectis much less. The MMPC synthesis in THF solutions containing HO(CH2)nSH/CH3(CH2)mSH (n ≠ m) showslarge thermodynamic control, which promotes a preferential adsorption of the thiols with a longer alkylchain onto the surface of clusters. Transmission electron microscopy (TEM) and UV−vis spectroscopy datasuggest that the average core dimension of MPCs generated from alkanethiols in THF is slightly smallerthan that of MPCs generated from alkanethiols in toluene under the same conditions.
|
| article type
| |
| is part of this journal
| |
