中文摘要：

以姜黄素和碘甲烷为原料,一步合成了二甲基姜黄素分子探针L,其结构经X-射线单晶衍射、~1H NMR,~（13）C NMR和ESI-MS等分析手段确证。该化合物晶体属单斜晶系,空间群C2/c,晶胞参数：a=22.317（6）nm,b=8.703 8（19）nm,c=23.039（5）nm,β=93.378（10）°,V=4 467.4（18）nm3,Z=4,Dc=1.206 g·cm-3,F（000）=1 720,μ（MoKα）=0.088 mm-1,R=0.080 9,ωR=0.216 3。探针L在甲醇-水溶液（体积比9∶1,Tris-HCl缓冲溶液,p H 7.2）中对Fe~（3＋）具有选择性识别和较强的抗干扰能力。通过紫外滴定以及质谱确证探针L与Fe~（3＋）形成1∶1配合物,结合常数（K）为1.089×106L/mol。该识别体系在Fe~（3＋）浓度为5.5×10-6~3×10~（-5）mol/L范围内具有较好的线性关系（r2=0.997 8）,检出限为2.2×10~（-6）mol/L。

英文摘要：

Abstract： The di-O-methylcurcumin L as a molecular probe was directly synthesized by using curcumin and iodomethane. The title compound was characterized by X-ray single-crystal diffraction, t H NMR, 13 C NMR and ESI - MS. The crystal structure of the compound belongs to monoclinic system with a space group of C2/c. The cell parameters were as follows： a = 22. 317 （6） nm, b = 8. 703 8 （19） urn, c = 23.039（5） nm, /3=93.378（10）°, V=4467.4（18） nm3, Z=4, Dc =1.206g.cm-3, F（000） = 1 720, μ （MoKα） = 0. 088 rmn R = 0. 080 9, wR = 0. 216 3. The probe L exhibited a selective and sensitive absorption response toward Fe3＋ over a wide range of metal ions in ethanol - water solution （9 ： 1, Tris - HC1 buffer, pH 7.2）. The results of ultraviolet titration and mass spectrometry showed that the probe L and Fe3 ＋ formed a 1 ： 1 complex, and the association constant K was deter- mined to be 1. 089 x 106 L/tool. The mothod showed good linearity（r2 = 0. 997 8） for Fe3＋ coneon- tration in the range of 5.5×10-6- 3 × 10-5 mol/L with a limit of detection of 2.2 ×10-6 mol/L.