Supramolecular structure probes, nuclear

In the author s opinion, the better approach to experimentally study the morphology of the silica surface is with the help of physical adsorption (see Chapter 6). Then, with the obtained, adsorption data, some well-defined parameters can be calculated, such as surface area, pore volume, and pore size distribution. This line of attack (see Chapter 4) should be complemented with a study of the morphology of these materials by scanning electron microscopy (SEM), transmission electron microscopy (TEM), scanning probe microscopy (SPM), or atomic force microscopy (AFM), and the characterization of their molecular and supramolecular structure by Fourier transform infrared (FTIR) spectrometry, nuclear magnetic resonance (NMR) spectrometry, thermal methods, and possibly with other methodologies. [Pg.85]

Supramolecular complexes involve well-defined noncova-lent interactions between individual components generating emerging properties. Most supramolecular complexes are formed under thermodynamic control and are dynamic entities in solution. The power of nuclear magnetic resonance (NMR) spectroscopy for the study of supramolecular complexes arises from its unique capacity to probe the environment of individual atomic nuclei reporting on the structure and dynamics of the formed complexes. In particular, NMR spectra can provide information about the symmetry... [Pg.262]