Routes to Ruthenium−Cobalt Clusters and Dicobalt Complexes with New Alkoxysilyl- or Sulfur-Functionalized Alkynes. X-ray Structures of [NEt₄][RuCo₃(CO)₁₀{μ₄-η²-HC₂(CH₂)₂OC(O)NH(CH₂)₃Si(OEt)₃}] and [Co₂(CO)₆{μ₂-η²-HC₂CH₂NHC(O)NH(CH₂)₃Si(OEt)₃}]

Abstract

Two general approaches are presented and compared to covalently link metal clusters to alkynes terminated with a trialkoxysilyl or a thioether group. They consist in the direct reaction of the functional alkyne with the cluster or in the functionalization of an alkyne already coordinated to the cluster. These are applied to the tetrahedral mixed-metal cluster [NEt4][RuCo3(CO)12] (NEt4·1). Complexes with the new alkynes HC⋮C(CH2)2OC(O)NH(CH2)3Si(OEt)3 (L 1 ), HC⋮CCH2NHC(O)NH(CH2)3Si(OEt)3 (L 2 ), and HC⋮CCH2NHC(O)NHC6H4SMe (L 3 ) have been characterized, and the crystal structures of [NEt4][RuCo3(CO)10{μ4-η2-HC2(CH2)2OC(O)NH(CH2)3Si(OEt)3}] (NEt4·2a) and [Co2(CO)6{μ2-η2-HC2CH2NHC(O)NH(CH2)3Si(OEt)3}] (9) have been determined by X-ray diffraction.

Synthesis of Polystyrene and Poly(4‐vinylpyridine) Mixed Grafted Silica Nanoparticles via a Combination of ATRP and CuI‐Catalyzed Azide‐Alkyne Click Chemistry

“…Alkyne‐functionalized SNPs were synthesized using Stöber method with tetraethoxysilane (TEOS)/[(2‐propynylcarbamate) propyl] triethoxysilane (PPTEOS) (100:5 in molar ratio) as coprecursors (Scheme c) . The synthesis of the organosilane PPTEOS is shown in Scheme c ( 1 H‐NMR spectrum in Figure S2b, Supporting Information) . PPTEOS has a terminal triple bond, which is prone to click with an azide moiety, and a triethoxysilyl group, which can be anchored onto the surface of silica nanoparticles forming a stable monolayer .…”

Induced T cell cytokine production is enhanced by engineered nanoparticles

“…Characterization by 1 H NMR and 13 C NMR indicated that further purification was not required (Choualeb et al, 2003; Lu et al, 2009). Commercial SNPs were condensed with PPTrEOS in basic EtOH–H 2 O mixture for 3 days, as outlined in Figure 1(E).…”

Iridium‐Complex‐Functionalized Fe3O4/SiO2 Core/Shell Nanoparticles: A Facile Three‐in‐One System in Magnetic Resonance Imaging, Luminescence Imaging, and Photodynamic Therapy

“…Ir complex sensitizer : The highly emissive, hydroxy‐functionalized Ir(III) complex [Ir(piq) 2 (ppOH)] was prepared by treatment of [IrCl(piq) 2 ] 2 with the pyridyl pyrazole (ppOH)H and Na 2 CO 3 in refluxing 2‐methoxyethanol (Scheme ). The (EtO) 3 Si‐functionalized Ir(III) complex [Ir(piq) 2 (ppTES)] was subsequently prepared using [Ir(piq) 2 (ppOH)], IECTS, and triethylamine in THF solvent 19. After stirring at reflux for 20 h, the solvent was evaporated under vacuum and the unreacted silane reagent was removed by repeated hexane washes.…”