Mthethwa Thandekile, Antunes Edith, Nyokong Tebello
Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa.
Dalton Trans. 2014 Jun 14;43(22):8230-40. doi: 10.1039/c4dt00197d.
A water soluble zinc phthalocyanine substituted with thiamine is reported in this work. The aggregation of this compound in aqueous solutions causes quenching of the fluorescence quantum yields. Gold nanospheres and nanorods were linked to the phthalocyanine. X-ray photoelectron spectroscopy showed that both the amine and the sulphur groups on the thiamine substituent of the zinc phthalocyanine were involved in the linking to gold nanoparticles. The Pc showed an increase in the fluorescence quantum yields in the presence of the nanoparticles. The singlet oxygen quantum yield increased when the Pc was conjugated to the nanoparticles and even higher for larger aspect ratio gold nanorods.
本研究报道了一种用硫胺素取代的水溶性锌酞菁。该化合物在水溶液中的聚集导致荧光量子产率猝灭。金纳米球和纳米棒与酞菁相连。X射线光电子能谱表明，锌酞菁硫胺取代基上的胺基和硫基均参与了与金纳米颗粒的连接。在纳米颗粒存在下，酞菁的荧光量子产率增加。当酞菁与纳米颗粒共轭时，单线态氧量子产率增加，对于纵横比更大的金纳米棒，单线态氧量子产率更高。
