Organosilylated Complex [Eu(TTA)₃(Bpy-Si)]: A Bifunctional Moiety for the Engeneering of Luminescent Silica-Based Nanoparticles for Bioimaging

Abstract

Supporting information FTIR data (KBr, cm -1 ) [Eu(TTA) 3 (Bpy-Si)]: 3 431 υ as (NH); 3 090 υ as (CH); 1 627 υ s (C=O); 1 578, 1 520, 1 υ(C=C, C=S); 1 357 υ as (C-F); 682 δ(C-F); 456 υ(Eu-(Bpy-Si)); 1 578 υ(C=C, C=N ring), 1 υ(Si-C); 1 089 υ(Si-O-C); 962 δ(Si-O) and 790 δ(CH ar ). [Ga(TTA) 3 (Bpy-Si)] 3 410 υas(NH); 3 090 υ as (CH); 1 654 υ s (C=O); 1 578, 1 520, 1 υ(C=C, C=S); 1 358 υ as (C-Cl); 680 δ(C-Cl); 456 υ(Gd-L). DRIFT SiO 2 -[Eu(TTA) 3 (Bpy-Si)] and SiO 2meso -[Eu(TTA) 3 (Bpy-Si)]: 2980 ν as (CH 2 ,CH 3 ); 2 ν s (CH 2 ,CH 3 ), 1 629 υ(C=O); 1414 υ(C=C, C=S); 1238-1050 υ(Si-C) , υ(Si-O),υ(Si-O-C); δ(Si-O-Si) and 796 δ(Si-O-C). SiO 2 @[Eu(TTA) 3 (Bpy-Si)]: 2 980 ν as (CH 2 ,CH 3 ); 2 878 ν s (CH 2 ,CH 3 ), 1 640 υ(C=O); 1 υ(C=C + C=S); 1 230-1 050 υ(Si-C), υ(Si-O), υ(Si-O-C); 950 δ(Si-O-Si) and 800 δ(Si-O-C).

Bifunctional Magnetic Luminescent Particles Based on Iron Oxide Nanoparticles Grafted with a Europium Silylated Bypiridine Tris(β‐diketonate) Complex

“…The band centered at 340 nm with a shoulder at 366 nm observed for γ‐Fe 2 O 3 [Eu(TTA) 3 (Bpy‐Si)] is attributed π ‐ π* transitions of TTA ligand. This band is red‐shifted for pure silylated Eu complex being encountered at 367 nm . As previously reported, the effect of the concentration of luminescent species also causes distortions on the shape of the excitation bands of powdered [Eu(TTA) 3 (Bpy‐Si)] complex compared to that of the silylated Eu complex grafted on silica surface of nanoparticles because, in the latter case, the luminescent species are diluted.…”

“…A description of the synthesis of luminescent [Eu(TTA) 3 (Bpy‐Si)] complex was previously reported by some of us elsewhere . Typically, an aqueous suspension of γ‐Fe 2 O 3 nanoparticles was obtained by precipitation of aqueous Fe II and Fe III chloride solutions in ammonia solution followed by oxidation with diluted nitric acid under ambient air at 90 °C.…”

“…In previously studies, Menu and co‐workers investigated the introduction of silylating groups in dipyridine and β ‐diketonates ,[25, 26] molecules in order to prepare silylated Eu III complexes. Recently, some of us investigated the covalent bonding of [Eu(2‐thenoyl‐trifluoroacetone) 3 ‐(4‐methyl‐4′‐(methylaminopropylalkoxysilyl)‐2,2′‐dipyridine] named as [Eu(TTA) 3 (Bpy‐Si)] inside uniform Stöber silica nanoparticles and spray‐pyrolysis derived mesoporous silica particles . This methodology allowed achieving luminescent silica nanoparticles with strong luminescence, high grafting ratios besides overcoming the release of chelate and tendency to agglomeration.…”

“…This methodology allowed achieving luminescent silica nanoparticles with strong luminescence, high grafting ratios besides overcoming the release of chelate and tendency to agglomeration. Therefore, the luminescent nanohybrids were successfully applied as luminescent labels for bioimaging of bacteria biofilms . Herein, we extended the incorporation of [Eu(TTA) 3 (Bpy‐Si)] complex to the surface of magnetic iron oxide nanoparticles covered with a thin silica layer.…”

Effect of lead fluoride incorporation on the structure and luminescence properties of tungsten sodium phosphate glasses

“…The 5 D 0 radiative rates A rad = R(A 0-J ) were calculated and the experimental lifetime values were obtained by fitting the 5 D 0 luminescence decay with I = I 0 exp(Àt/ s exp ), as shown in Fig. 6 [41].…”