An organic molecule containing cobalt phosphate (denoted CoPO-GIS) which is isostructural with the zeolite gismondine has been synthesized under solvothermal conditions by using [Co(en)3]Cl3 and phosphoric acid as the reactants and ethylene glycol as the solvent. CoPO-GIS ((H3NCH2CH2NH3)0.5*CoPO4) crystallizes in the monoclinic space group C2/c with a=14.744(3) Å, b=8.850(3) Å, c=10.062(3) Å,β=131.609(19)°, and Z=8. The structure consists of a 3-D network of strictly alternating CoO4 and PO4 tetrahedra interconnected by oxygen bridges, and the charge-balancing diprotonated ethylenediamine cations are highly ordered in the cages of the CoPO4 framework. CoPO-GIS is the only amine-containing cobalt phosphate with a known zeolite topology.

The successful synthesis of M41S materials,[1,2] a new family of novel silicates with uniform mesopores, opened a vast range of applications[3-7] in catalysis, sorption, molecular recognition, electronics, and photochemistry. One of the members of this family of materials is MCM-41, which contains a hexagonal array of mesopores with a pore diameter of 20 100,A depending on the conditions of its synthesis. It is postulated[2] that the inorganic walls around the mesopores of MCM-41 are constructed of disordered SiO4 tetrahedral units, as is also the case for amorphous silicates. NMR studies[2,8] reveal that MCM-41 contains many silanol groups both before and after the template molecules have been removed. These silanols may act as functional groups in chemical reactions or can be utilized to attach molecules having other functional groups. Although the structure and stability of the pores are well understood, little is known about the nature of the silanol groups in MCM-41. To shed some light on this, we monitored the IR absorptions of the silanol groups in template-free MCM-41 as a function of evacuation temperature before and after silylation by chlorotrimethylsilane (CTMS) and chlorotriphenylsilane (CTPS).

Hydrothermal synthesis of two new fluorinated indium phosphates [InPO4F(Hen)] and [In5P4F3O16(en)3(OH2)2] is carried out in the system In2O3-P2O5-en-HF-H2O (en = ethylenediamine); these have two-and three-dimensional inorganic frameworks respectively, with the latter having ten-membered ring channels spanned by coordinated en; the fluorides bridge exclusively between indium ions and may be linear or bent.

The structural features, the synthesis and the role of templates in the synthesis for mixed-bonded open-framework aluminophosphates and related layered materials will be reviewed in this article. These aluminophosphate materials difer from the (4,2)-coanected aluminophosphates and zeolites in that they contain TO5 and/or TO6 primary building units or terminal T-O bonds (T stands for AI or P). The extra ligands for the TO5 and TO6 units in the aluminophosphates with framework AI/P = I are either bridging OH groups or H20 molecules in most cases whereas the terminal T--O bonds are either P--OH or P---O species with P=O bonds being prevalent in layered aluminophosphates. Most of TO5 or TO6 containing aluminophosphates are prepared using a cyclic amine or a diamine as the structure directing agent (template). and the aluminophosphates with AI/P < 1 or the layered materials tend to form from an alcoholic medium. Both synthetic conditions and templates play a critical role in determining the composition and structural feature of these materials.

e hydrogen-bonded species are eliminated at elevated temperatures under vacuum whereas the isolated ones remain. Loading C60 in the MCM-41 materials greatly changes their dehydroxylation behavior. When the MCM-41:C60 weight ratio is 10:1, at about 400℃ under vacuum, the isolated silanols are reduced to a certain degree whereas the hydrogen-bonded hydroxyls become more resistant to thermal treatment by comparison with those in the parent C60-free samples. Increasing the loading amount of C60 to a MCM-41:C60 weight ratio of 10:3 results in complete removal of both isolated and hydrogen-bonded silanols, at about 350℃. However, the two MCM-41 samples exhibit different infrared spectra at lower evacuation temperatures in the presence of C60, indicative of a discrepancy in the dehydroxylation process between them. It is postulated that during the dehydroxylation, C60 captures hydroxyls from the silanol groups of MCM-41 to form C-H and C-OH species, followed by condensation of the C-OH groups and/or combination of C-OH with C-H.