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Upconverting Nanoparticles Prompt Remote Near-Infrared Photoactivation of Ru(II)-Arene Complexes

机译:上转换纳米粒子提示Ru(II)-Arene配合物的远程近红外光活化。

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The synthesis and full characterisation (including X-ray diffraction studies and DFT calculations) of two new piano-stool Ru-II-arene complexes, namely [((6)-p-cym)Ru(bpy)(m-CCH-Py)][(PF)(6)](2) (1) and [((6)-p-cym)Ru(bpm)(m-CCH-Py)][(PF)(6)](2) (2; p-cym=p-cymene, bpy=2,2-bipyridine, bpm=2,2-bipyrimidine, and m-CCH-Py=3-ethynylpyridine), is described and discussed. The reaction of the m-CCH-Py ligand of 1 and 2 with diethyl-3-azidopropyl phosphonate by Cu-catalysed click chemistry affords [((6)-p-cym)Ru(bpy)(P-Trz-Py)][(PF)(6)](2) (3) and [((6)-p-cym)Ru(bpm)(P-Trz-Py)][(PF)(6)](2) (4; P-Trz-Py=[3-(1-pyridin-3-yl-[1,2,3]triazol-4-yl)-propyl]phosphonic acid diethyl ester). Upon light excitation at =395nm, complexes 1-4 photodissociate the monodentate pyridyl ligand and form the aqua adduct ions [((6)-p-cym)Ru(bpy)(H2O)](2+) and [((6)-p-cym)Ru(bpm)(H2O)](2+). Thulium -doped upconverting nanoparticles (UCNPs) are functionalised with 4, thus exploiting their surface affinity for the phosphonate group in the complex. The so-obtained nanosystem UCNP@4 undergoes near-infrared (NIR) photoactivation at =980nm, thus producing the corresponding reactive aqua species that binds the DNA-model base guanosine 5-monophosphate.
机译:两种新型钢琴凳Ru-II-芳烃配合物[[((6)-p-cym)Ru(bpy)(m-CCH-Py)的合成和完整表征(包括X射线衍射研究和DFT计算) )] [(PF)(6)](2)(1)和[((6)-p-cym)Ru(bpm)(m-CCH-Py)] [(PF)(6)](2) (2;对-cym =对-cymene,bpy = 2,2-联吡啶,bpm = 2,2-联嘧啶,和m-CCH-Py = 3-乙炔基吡啶)。 1和2的m-CCH-Py配体与3-叠氮基丙基膦酸二乙酯通过Cu催化的点击化学反应得到[((6)-p-cym)Ru(bpy)(P-Trz-Py)] [(PF)(6)](2)(3)和[((6)-p-cym)Ru(bpm)(P-Trz-Py)] [(PF)(6)](2)(4 ; P-Trz-Py = [3-(1-吡啶-3-基-[1,2,3]三唑-4-基)-丙基]膦酸二乙酯)。在= 395nm处激发光后,配合物1-4光解单齿吡啶基配体并形成水合加成离子[((6)-p-cym)Ru(bpy)(H2O)](2+)和[((6) -p-cym)Ru(bpm)(H2O)](2+)。 4,掺杂的上转换纳米粒子(UCNP)用4进行了功能化,因此利用了它们对复合物中膦酸酯基团的表面亲和力。如此获得的纳米系统UCNP @ 4在= 980nm处进行近红外(NIR)光活化,从而产生与DNA模型基础鸟苷5一磷酸结合的相应反应性水族物质。

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