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首页> 外文期刊>Chemistry: A European journal >Light-Harvesting Metallosupramolecular Squares Composed of Perylene Bisimide Walls and Fluorescent Antenna Dyes
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Light-Harvesting Metallosupramolecular Squares Composed of Perylene Bisimide Walls and Fluorescent Antenna Dyes

机译：Per双酰亚胺壁和荧光天线染料组成的聚光金属超分子正方形。

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The fluorescent dye 4-dime-thylamino-l,8-naphthalimide was incor-porated at the bay area of N,N'-bispyr-idyl perylene bisimide to afford a four-fold-functionalized perylene bisimide ligand.Through self-assembly directed by metal-ion coordination,a multichro-mophore supramolecular entity com-posed of sixteen dimethylaminonaph-thalimide antennas and a perylene bis-imide-walled square core was subse-quently constructed from this linear di-topic ligand and 90~(deg) metal corner [Pd-(dppp)](OTf)_2 (dppp=l,3-bis(diphe-nylphosphino)propane;OTf=trifluoro-methanesulfonate) in good yield.The isolated metallosupramolecular square was characterized by elemental analysis and ~1H,~(13)C,and ~(31)P{~1H} NMR and UV/Vis spectroscopy.Furthermore,by means of ~1H NMR diffusion-ordered spectroscopy (DOSY) the dimension of this assembly was evaluated by em-ploying a previously reported perylene bisimide ligand and its square assembly as references.The results obtained con-firm the square framework of the cur-rent assembly.The optical properties of this multichromophore dye assembly were investigated by UV/Vis and steady-state and time-resolved fluores-cence spectroscopy.It was revealed that light captured by dimethyl-aminonaphthalimide antennas could be efficiently transported to the perylene bisimide core by a fluorescence reso-nance mechanism (energy-transfer effi-ciency ￡=95%),and this resulted in almost exclusive detection of intense perylene bisimide emission,irrespec-tive of the excitation wavelength ap-plied.The present square scaffold con-taining aminonaphthalimide antenna dyes exhibits more than seven times higher fluorescence quantum yield (PHI_(fl)=O.37) than a previously reported pyrene-bearing perylene bisimide-walled square (PHI_(fl)=0.05).Thus,this multichromophore square assembly with aminonaphthalimide antenna dyes is an artificial model for the cyclic light-harvesting complexes in purple bacteria.
机译：在N，N'-双吡啶-二萘嵌苯bi酰亚胺的海湾区域掺入4-二乙胺基-1,8-萘二甲酰亚胺荧光染料，得到四官能团的per联酰亚胺配体。通过金属离子配位，随后由该线性二位配体和90〜°金属构成由16个二甲氨基萘-邻苯二甲酰亚胺天线和per双酰亚胺壁的方形核组成的多色团超分子实体。角[Pd-（dppp）]（OTf）_2（dppp = 1,3-双（二苯甲基膦基）丙烷; OTf =三氟甲烷磺酸盐），收率良好。分离的金属超分子正方形通过元素分析和〜1H表征， 〜（13）C和〜（31）P {〜1H} NMR和UV / Vis光谱。此外，借助〜1H NMR扩散有序光谱（DOSY），通过使用先前报道的per双酰亚胺配体及其正方形组装物作为参考。获得的结果证实了铜的正方形框架。 r-rent组装。该多色团染料组装的光学性质通过UV / Vis以及稳态和时间分辨荧光光谱法进行了研究，结果表明，二甲基氨基萘酰亚胺天线捕获的光可以有效地传输到per。双酰亚胺核心通过荧光共振机制（能量转移效率￡ = 95％），几乎可以检测到强烈的per双酰亚胺发射，而与激发波长无关。包含氨基萘二甲酰亚胺的天线染料显示的荧光量子产率（PHI_（fl）= O.37）比以前报道的带有per的bi双酰亚胺壁的正方形（PHI_（fl）= 0.05）高出七倍以上。氨基萘二甲酰亚胺天线染料的正方形组装是紫色细菌中循环光收集复合物的人工模型。

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