Guests organic

Figure 2. Effect of guest organic amine on the XRD profiles of both TPA-ZSM-5(a) and Na-ZSM-5(b).

Some notes concern the presentation of extraction data and technical issues. Extraction chemists typically prefer to employ an excess of the host relative to guest to ensure high recovery, to use equal phase volumes, and to use characteristics like guest recovery, R, its distribution ratio, D, or the extraction constant, K x- Inversely, pure host-guest (organic) chemists often employ an excess of the guest, use different volumes of organic and aqueous phases, and indicate a host saturation ratio, S, as a characteristic of extraction efficiency. It seems convenient to list some conversion rules here. 

The guests, organic or coordination compounds, fixed in the inorganic matrices, show an increased thermal stability in comparison with the corresponding free molecules. 

This group of nanocomposites has been the first one to be studied because of the very simple sol-gel chemistry involved in the preparation of guest-host composites. The guest organic molecules are dissolved in the precursor sol during the synthesis and at the end of the preparation will result in being incorporated within the oxide network. Several examples have been reported and different matrixes have been used, such as silica (Dai, 1992) or silica-titania. Some alternative routes have been also proposed to improve the... 

Chemical Status of Guest Organics in the Intracrystalline Space... 

The use of RTF allowed encapsulation a guest organic molecule by dimeric para-phosphonic acid-containing calix[5]arene capsule 382 [50]. This hydrogen-bonded capsule binds carboplatin... 

Poznyak S. K., Tedim J., Rodrigues L. M., SalakA. N., ZheludkevichM. L. etal (2009), Novel Inorganic Host Layered Double Hydroxides Intercalated with Guest Organic Inhibitors for AnticorrosionApplications ,HGS 4p/7/. Mater. Inter., 1,2353-62. 

---