| Abstract
| - The combination of Ni2+, dipropylenetriamine (dipn), and [Cr(CN)6]3- affords the cyanide-bridged bimetallic assembly [Ni(dipn)]3[Cr(CN)6]2·3H2O, providing a 3-D network based on a Cr8Ni12 cubane unit and a ferromagnetic ordering at 42 K, which is regarded as a complete ferromagnet, providing three-dimensional ferromagnetic interaction through a three-dimensional bridging structure.
- The combination of Ni2+, dipropylenetriamine (dipn), and [Cr(CN)6]3- affords the cyanide-bridged bimetallic assembly,[Ni(dipn)]3[Cr(CN)6]2·3H2O (1). This compound crystallizes in cubic space group Pa3̄, with a = b = c = 20.9742(7) Å and Z = 8. A three-dimensional network is constructed on the basis of a Cr8Ni12 cubane unit formed by analternate array of [Cr(CN)6]3- and [Ni(dipn)]2+ units through Cr−CN−Ni−NC−Cr edges. Cryomagnetic studies reveala ferromagnetic interaction between CrIII and NiII ions and a long-range ferromagnetic ordering below 42 K withvery small coercive field. To the best of our knowledge, this compound is the first “complete ferromagnet” providingthree-dimensional ferromagnetic interaction through a three-dimensional bridging structure that is based on a cubicunit among general metal-oxide and molecule-based magnets. Magnetooptical studies demonstrate a strong correlationbetween magnetic and optical properties.
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