single-molecule magnet behavior for 3 were found at 2 K. Phosphorescence, emission and excitation spectra at 298 K and 77 K for the complexes were measured, as well as luminescence decay times were determined. The compounds 1 and 3 showed intense luminescence with decay time at 298 K equal to 0.66 and 1.44 ms respectively. Intrinsic quantum yield for 1 determined from its emission spectrum was found to be 25%.
的组合物LN pentanuclear carbacylamidophosphate复合物的第一代表5大号6(μ-L)4(μ 3 -OH)4(μ 4 -OH)(LN III =
铕(1),
钆(2),TB(3) ,L - [C = dimethylbenzoylamidophosphate离子6 ħ 5(O)(OCH C(O)-N-P 3)2 ] - )获得。单晶X-射线分析揭示的该多核芯1包含五个
铕离子,由μ连接3 -和μ 4个-hydroxo组和carbacylamidophosphate
配体。化合物1 - 3被认为是同构。磁化率的温度依赖性(χ中号化合物)1和2可以通过
铕自旋轨道耦合来解释III离子或四个的Gd反
铁磁交换相互作用III位于Gd组成的碱离子5
金字塔,分别。在3的情况下,的值χ中号随温度下降从300K到50 K,并且然后增大降温过程中降低下来,直到2 K.这样的行为可以通