Anions as Triggers in Controlled Release Protocols from Mesoporous Silica Nanoparticles Functionalized with Macrocyclic Copper(II) Complexes
作者:Sameh El Sayed、Michele Milani、Chiara Milanese、Maurizio Licchelli、Ramón Martínez-Máñez、Félix Sancenón
DOI:10.1002/chem.201601024
日期:2016.9.19
Three different mesoporous silica nano‐sized materials (SC1, SC2, and SC3), loaded with [Ru(bipy)3]2+ dye (bipy=bipyridine) and functionalized on the external surface with three macrocyclic copper(II) complexes (C1, C2, and C3), were synthesized and characterized. When SC1, SC2, and SC3 were suspended in water, the entrapped [Ru(bipy)3]2+ dye was free to diffuse from the inner pores to the solution
三种不同的介孔二氧化硅纳米级材料(SC1,SC2和SC3),负载有[Ru(bipy)3 ] 2+染料(bipy = bipyridine),并在外表面上用三种大环铜(II)配合物(C1,C2和C3)进行了合成和表征。将SC1,SC2和SC3悬浮在水中时,截留的[Ru(bipy)3 ] 2+染料可从内部孔自由扩散到溶液中。但是,添加阴离子会导致一定程度的孔堵塞,并随后抑制染料释放。小的一价和二价阴离子无法诱导完全的孔堵塞,而笨重且带高电荷的阴离子则导致[Ru(bipy)3 ] 2+输送量显着降低。最好的[Ru(bipy)3 ] 2+传递抑制剂是ATP和六偏磷酸根阴离子。抑制作用归因于阴离子与SC1,SC2和SC3表面上的接枝Cu II配合物的相互作用支持。选择六偏磷酸根阴离子可制备两种带帽材料(SC1-mPh和SC3-mPh)。该研究的[Ru(联吡啶)3 ] 2+从固体染料释放SC1-MPH