3.11 TEM analysis

of the particles. The SEM images further revealed the stabilization of La(III) 1 nanoparticles due to interaction with the Schiff base ligand; this stabilization facilitates penetration of tumor cell membrane and causes the destruction of tumor cell [32].

Figure 4.

Figure 5.

26

TEM image of La(III) nanocomplex 2.

Figure 3.

EDX spectra of nano-La(III) complex 2.

Green Chemistry Applications

SEM images of nanoparticles as produced by ultrasound [(La)(L1

)(NO3)(H2O)] (1).

Transmission electron microscopy (TEM) can be used to directly image nanoparticles at scales approaching a single atom. TEM analysis is performed to examine the size and shape of the nanoparticles. The La(III) complex 2 nanoparticle was fairly uniform in size, spherical in shape, and with the average diameter

Figure 6. Suggested structure of metal complexes 1–3.

Figure 7. Geometry-optimized structures of (a) complex 1( b) La complex 2.

ranging from 3.2 to 44.9 nm (Figure 5). Electron microscopy analysis allowed confirming visually the observed stability of the obtained nanocomplex.

Correlation of all results obtained for the complexes under study gives us information regarding the suggested structure of the complexes to be as in Figure 6. The fully optimized geometries of the ligand and its metal complexes were shown in Figure 7.
