Diaminotriazine-substituted nitronyl nitroxide: a novel building block for organic magnets having multiple hydrogen bonding substituents as structure-determining supramolecular synthons

作者：Tanaka Hiroyuki; Shiomi Daisuke^*; Suzuki Shuichi; Kozaki Masatoshi; Okada Keiji; Sato Kazunobu; Takui Takeji

来源：CrystEngComm, 2010, 12(2): 526-531.

DOI：10.1039/b909757k

As a novel radical building block possessing multiple hydrogen bond functionality, we have designed and synthesised diaminotriazine-substituted nitronyl nitroxide (DAT-NN; 1). The diaminotriazine moiety of 1 forms two kinds of hydrogen bonding and molecule 1 forms an S = 1/2 uniform antiferromagnetic Heisenberg chain with the exchange interaction of J/k(B) = -15.3 K in the crystalline solid, which is attributable to close contacts between the nitronyl nitroxide oxygen atoms. H-1-ENDOR spectroscopy has shown that the triazine moiety has little significant spin density. Thus, the diaminotriazine moiety plays a role primarily in determining the molecular packing instead of propagating intermolecular magnetic interactions in the crystalline solid.

• 出版日期2010