基于咪唑离子液体的锰(Ⅱ)配合物的合成、晶体结构及发光性能

Synthesis,Crystal Structures and Photophysical Properties of Manganese(Ⅱ) Complexes Based on Imidazole Ionic Liquids

室温下,通过改变卤化咪唑类离子液体的种类,合成了2个结构和光学性能不同的低维锰(Ⅱ)配合物(C4H7N2)[MnCl3(H2O)](1)和(C4H7N2)2[MnBr4](2)。采用单晶X射线衍射、光致发光光谱、X射线激发发射光谱、衰减曲线、热重分析等手段对配合物进行了详细的表征。X射线单晶衍射结果表明:配合物1属单斜晶系,P21/n空间群,中心离子Mn(Ⅱ)为八面体构型;配合物2属三斜晶系,空间群为P1,中心离子Mn(Ⅱ)为四面体构型。在370 nm紫外光的激发下,固体配合物1和2分别发射深红色光和绿色光,其荧光寿命分别为200.11和37.23μs,量子产率分别为23.52%和5.54%,并且在X射线激发下,表现出优良的X射线荧光性能。

Two low dimensional Mn(Ⅱ)complexes,(C4H7N2)[MnCl3(H2O)](1)and[(C4H7N2)2][MnBr4](2),with different structures and optical properties have been synthesized by changing the types of imidazole ionic liquids species at room temperature.The complexes 1 and 2 have been characterized by single-crystal X-ray diffraction,photoluminescence,X-ray excitation emission spectrum,decay curve and thermogravimetric analysis.The X-ray diffraction results show that 1 crystallizes in the monoclinic space group P21/n,and the central Mn(Ⅱ)has an octahedral configuration,and 2 crystallizes in the triclinic space group P1,and the central Mn(Ⅱ)has a tetrahedron configuration.Under the UV light(λex=370 nm),solid complexes 1 and 2 emitted deep-red and green emission,respectively.The photoluminescence decay times were 200.11 and 37.23μs,respectively,and their quantum yield were 23.52%and 5.54%,respectively.Moreover,under the excitation of X-ray,they showed the better X-ray fluorescence performance.CCDC:1952391,1;1952392,2.