High-Throughput Study of the Cu(CH3COO)2路H2O鈭?-Nitroisophthalic Acid鈭扝eterocyclic Ligand System: Synthesis, Structure, Magnetic, and Heterogeneous Catalytic Studies of
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- 作者：Debajit Sarma ; K. V. Ramanujachary ; Norbert Stock ; Srinivasan Natarajan
- 刊名：Crystal Growth & Design
- 出版年：2011
- 出版时间：April 6, 2011
- 年：2011
- 卷：11
- 期：4
- 页码：1357-1369
- 全文大小：1355K
- 年卷期：v.11,no.4(April 6, 2011)
- ISSN：1528-7505
文摘
A high-throughput screening was employed to identify new compounds in Cu(CH3COO)2路H2O鈭扤IPA鈭抙eterocyclic ligand systems. Of the compounds identified, three compounds, [Cu3{(NO2)鈭扖6H3鈭?COO)2}3(C3N6H6)] (I), [Cu2(渭3-OH)(H2O){(NO2)鈭扖6H3鈭?COO)2}(CN4H)]路(H2O) (II), and [Cu2(渭3-OH)(H2O){(NO2)鈭扖6H3鈭?COO)2}(CN5H2)]路2(H2O) (III), have been isolated as good quality single crystals by employing conventional hydrothermal methods. Three other compounds, Cu2{(NO2)鈭扖6H3鈭?COO)2}(CN4H)(H2O) (IIa), Cu2{(NO2)鈭扖6H3鈭?COO)2}(CN5H2) (IIIa), and Cu2{(NO2)鈭扖6H3鈭?COO)2}{(CN5H2)2}2H2O (IIIb), were identified by a combination of elemental analysis, thermogravimetric analysis (TGA), and IR spectroscopic studies, although their structures are yet to be determined. The single crystalline compounds were also characterized by elemental analysis, TGA, IR, UV鈭抳is, magnetic, and catalytic studies. The structures of the compounds have paddle wheel (I) and infinite Cu鈭扥(H)鈭扖u chains (II and III) connected with NIPA and heterocyclic ligands forming two- (II) and three-dimensional (I and III) structures. The bound and lattice water molecules in II and III could be reversibly removed/inserted without affecting the structure. In the case of II, the removal of water gives rise to a structural transition, but the dehydrated phase reverts back to the original phase on prolonged exposure to atmospheric conditions. Magnetic studies indicate an overall antiferromagnetism in all of the compounds. Lewis acid catalytic studies indicate that compounds II and III are active for cyanosilylation of imines.