Efficient red luminescence from organic-soluble Au25 clusters by ligand structure modification

摘要: An efficient method to enhance visible luminescence in a visibly non-luminescent organic-soluble 4-(tert butyl)benzyl mercaptan (SBB)-stabilized Au25 cluster has been developed. This relies mainly on enhancing the surface charge density by creating an additional shell of thiolate surface, which enhances luminescence. The viability this demonstrated imparting red various ligand-protected quantum clusters (QCs), observable naked eye. bright luminescent material derived from Au25SBB18 was characterized using UV-vis and spectroscopy, TEM, SEM/EDS, XPS, TG, ESI MALDI mass spectrometry, collectively proposed uncommon molecular formula Au29SBB24S, suggested be due different stapler motifs protecting core. critical role temperature emergence QCs studied. restoration ligand subsequent physicochemical modification were probed spectral spectroscopic techniques. Our results provide fundamental insights into characteristics determining QCs.