[Au24Pt(TBBT)12(TDT)3] 0 (3). First, 5.0 mg of NC 1 was dissolved in 3.4 mL of toluene, to which 500 µL of TBBTH (97%, Tokyo Chemical Industry) was added at 60 °C, and the mixture was stirred for 1.5 h to allow the ligand exchange reaction to proceed. The resulting product was washed with ultrapure water and a mixture of ultrapure water and methanol and extracted with dichloromethane. Finally, the products were separated by PTLC (dichloromethane:hexane = 7:13), and the top layer was scraped off and dissolved in dichloromethane to obtain NC 3 (Scheme 1 and S3).