150814-59-8Relevant articles and documents
Self-Assembled Mono- and Multilayers on Gold from 1,4-Diisocyanobenzene and Ruthenium Phthalocyanine
Huc, Vincent,Bourgoin, Jean-Philippe,Bureau, Christophe,Valin, Fran?oise,Zalczer, Gilbert,Palacin, Serge
, p. 10489 - 10495 (1999)
Self-assembled monolayers of 1,4-diisocyanobenzene on gold were used to bind ruthenium phthalocyanines to the surface by axial ligation of the macrocycle with isocyanide groups pointing out from the SAM. The 1,4-diisocyanobenzene SAM and the RuPc-1,4-diisocyanobenzene bilayer were characterized by ellipsometry, IRRAS, XPS, and SPM. The grafting of RuPc to the SAM is stable. The thickness of the film increases from 10 to 15 ? upon RuPc ligation. IRRAS reveals that both ends of the 1,4-diisocyanobenzene are affected by the N≡C to metal interaction occurring at the other end. XPS indicates that each RuPc macrocycle covers ~12 1,4-diisocyanobenzene molecules in the bilayer.
Microenvironment-switchable singlet oxygen generation by axially-coordinated hydrophilic ruthenium phthalocyanine dendrimers
Hahn, Uwe,Setaro, Francesca,Ragas, Xavier,Gray-Weale, Angus,Nonell, Santi,Torres, Tomas
experimental part, p. 3385 - 3393 (2011/09/20)
A series of new metallodendrimers built around a ruthenium phthalocyanine core has been prepared. Employing a convergent synthetic strategy, pyridine-containing ligands were prepared and then assembled onto the ruthenium phthalocyanine through axial ligand coordination. The growing shell of oligoethylene glycol chains surrounding the lipophilic core allows solubilisation in water. Photophysical studies show that all the metallodendrimers are strongly phosphorescent and the deactivation pathway of their triplet state depends on the medium in which the compounds are dissolved. On one hand, quenching of the triplet state by the dendritic shell is observed and found to be substantially enhanced in aqueous media. On the other, the dendrimer shields the phthalocyanine from oxygen. This notwithstanding, the phthalocyanines are able to generate singlet oxygen in less polar environments such as in CHCl3 or THF solution, while in water the generation of singlet oxygen is almost completely switched off. the Owner Societies 2011.