Zhiming Duan, Yan Zhang, Bin Zhang, and Daoben Zhu

　　The application of crystal-to-crystal transformations involving dimensionality changes of coordination polymers to generate dynamic magnetic systems is currently a challenging topic in molecular materials research. Although a few crystal-to-crystal transformations have been reported in recent years, very few examples involving crystal-to-crystal transformations exhibiting drastic changes in magnetic properties are known. It is usually difficult to obtain high-quality transformed crystals after removal of the bonded waters or solvents because of the collapse of the framework. Two new compounds, CoCl₂(1,4-dioxane)(H₂O)₂(1) and CoCl2(1,4-dioxane) (2) from ternary MCl2-H2O-(1,4-dioxane) system, which undergo a crystal-to-crystal transformation from 1D chains in 1 into a 3D diamondoid network in 2 accompanied by a drastic change in magnetic properties. The results were published on Journal of the American Chemical Society (2009, Vol. 131, 6934-6935) with the finical supporting from CMS-CX, NSFC and MOST (China).

　　J. Am. Chem. Soc., 2009, 131, 6934-6935.