Small Water Clusters in Crystalline Hydrates

Hexamethylenetetramine: An old new building block for design of coordination polymers

“…In recent years, the identification, description and classification of various water clusters and polymeric water assemblies within the structures of diverse crystalline materials have become a blooming research area as attested by the number of publications covering this topic, including the state-of-the-art reviews of Infantes et al [79], Nangia [80], Supriya and Das [81] and Ludwig [82]. The importance of this research consists in providing a contribution toward understanding the properties of bulk water in its liquid and solid states, and interpretation of water-water interactions and hydration phenomena in physical and materials chemistry, biochemistry, catalysis and supramolecular chemistry, drug design and pharmacology [79][80][81][82][83].…”

“…The importance of this research consists in providing a contribution toward understanding the properties of bulk water in its liquid and solid states, and interpretation of water-water interactions and hydration phenomena in physical and materials chemistry, biochemistry, catalysis and supramolecular chemistry, drug design and pharmacology [79][80][81][82][83].…”

“…In contrast to the intensive research on water clusters [79][80][81][82][83], much less attention has been focused on the description of hybrid H-bonded water assemblies with different solvents, small molecules or counterions, in spite of their frequent presence in a variety of crystalline materials [84]. Hence, apart from the abovementioned water clusters and 1D networks, a few hybrid water associates with other solvents or anions have been identified in coordination polymers of hmt (Table 5) …”

An Interesting Array of Cyclic Tetramer Water in the Molecular Structure of [V6O12(phen)4(CH3O)4] · 4H2O

“…The four water molecules linked by hydrogen bonds generate a two-dimensional (2D) box structure as shown in Such an arrangement results in the formation of a square-prism water tetramer which, to the best of our knowledge, has not been experimentally observed [24] and theoretical predicted [23] so far.…”

Syntheses, crystal, and molecular structures of Mn(II), Zn(II), and Ce(III) compounds and solution studies of Mn(II), Ni(II), Cu(II), Zn(II), Cd(II), and Ce(III) compounds obtained from a suitable proton transfer compound containing bda and pydcH2 (bda = butane-1,4-diamine; pydcH2 = pyridine-2,6-dicarboxylic acid)

“…Hence, we are now preparing a brief review about possible formation of different kinds of (H 2 O) n clusters among our coordination and proton transfer compounds which are synthesized by our research groups since 2000 [24]. The identification and characterization of the latter in various crystalline materials has become a popular research field in recent years [25][26][27][28], thus contributing to the important understanding of the properties of bulk water in its both liquid and solid states, and water-water interactions in various environments. Hence, our research group has studied and worked on several bi-or tri-valent metal complexes including main group metals with several proton transfer compounds .…”