| 초록 |
Au(I)-alkanethiolates (Au(I)-SRs) are synthesized by mixing gold salt and n-alkanethiols in tetrahydrofuran. Au(I)-SRs show a highly ordered layer structure and the ordering increases as the length of the alkyl chain increases. Au(I)-SRs with n 4 emit bright orange-red light visible to the naked eye upon the irradiation with UV light and the emission intensity increases with increasing the length of the alkyl chain. We also found that noticeable aurophilic interactions between the Au(I)-Au(I) exists for the Au(I)-SRs with longer alkyl groups having highly ordered layer structures. Upon heating the sample, the conformation of the alkyl groups in Au(I)-SRs changed from the initial all-trans state at room temperature to the gauche containing disorder state along with the decrease of emission intensity, and then Au(I)-SRs changed to a mixture of di-n-alkyl disulfide, di-n-alkyl sulfide, and gold nanoparticles stabilized by the n-alkanethiolates. |
