Photoisomerisation and ligand-controlled reversible aggregation of azobenzene-functionalised gold nanoparticles
作者:Anja Köhntopp、Alexandra Dabrowski、Michal Malicki、Friedrich Temps
DOI:10.1039/c4cc02250e
日期:——
The photochemical behaviour of functionalised gold nanoparticles (AuNPs) carrying azobenzenethiolate–alkylthiolate monolayers was investigated. Repeated trans–cis and cis–trans isomerisation cycles could be performed in all cases with high efficiency. Reversible photoinduced aggregation was observed when azothiolates with long alkyl spacers (≥C7) were combined with short (C5) alkylthiolate coligands. The choice of a coligand thus offers control over the aggregation properties of the nanoparticles.
功能化金纳米颗粒(AuNPs)携带偶氮苯硫醇-烷基硫醇单层的光化学行为被研究。在所有情况下,高效的重复反式-顺式和顺式-反式异构化循环均可实现。当具有长烷基间隔基(≥C7)的偶氮硫醇与短(C5)烷基硫醇配体结合时,观察到可逆的光诱导聚集现象。因此,配体的选择为纳米粒子的聚集性质提供了控制手段。