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首页> 外文期刊>Chemistry: A European journal >Porphyrin-Appended Europium(III)Bis(phthalocyaninato)Complexes:Synthesis,Characterization,and Photophysical Properties
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Porphyrin-Appended Europium(III)Bis(phthalocyaninato)Complexes:Synthesis,Characterization,and Photophysical Properties

机译：附卟啉的Euro（III）双（邻酞菁）复合物：合成，表征和光物理性质

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摘要

Mixed cyclization of 3-mono-4-mono-,or 4.5-di(porphyrinated)phthalonitrile compounds 2,3,or 6 and unsubstituted phthalonitrile with the half-sandwich complex[Eu~(III)-(acac)(Pc)](Pc=phthalocyaninate,acac=acetylacetonate)as the template in the presence of 1,8-diazabicyclo-[5.4.0]undec-7-ene(DBU)in n-penta-nol afforded novel porphyrin-appended europium(III)his(phthalocyaninato)complexes 7-9 in 30-40% yield.These mixed tetrapyrrole triads and tetrad were spectroscopically and electro-chemically characterized and their pho tophysical properties were also investi gated with steady-state and transient spectroscopic methods.It has been found that the fluorescence of the por phyrin moiety is quenched effectively by the double-decker unit through an intramolecular photoinduced electron-transfer process,which takes place in several hundred femtoseconds,while the recombination of the charge-sepa rated state occurs in several picosec onds.By using different phthalocya nines containing different numbers of porphyrin substituents at the peripheral or nonperipheral position(s)of the ligand,while the other unsubstituted phthalocyanine remains unchanged in these double-deckers,the effects of the number and the position of the porphy rin substituents on these photophysical processes were also examined.
机译：3-单4-单-或4.5-二（卟啉化）邻苯二甲腈化合物2,3，或6与未取代的邻苯二甲腈与半三明治复合物的混合环化[Eu〜（III）-（acac）（Pc）]在正戊五醇中有1,8-二氮杂双环-[5.4.0]十一碳-7-烯（DBU）存在的条件下，以（Pc =酞菁氰酸酯，acac =乙酰丙酮酸酯）为模板提供了新型卟啉加-（III）以30-40％的产率合成了7-9的他的（酞菁氨基）络合物。对这些混合的四吡咯三联体和四联体进行了光谱和电化学表征，并通过稳态和瞬态光谱法研究了它们的光物理性质。卟啉部分的荧光通过分子内光诱导的电子转移过程被双层单元有效地猝灭，该过程发生在几百飞秒内，而电荷分离状态的重组发生在数个皮秒内。通过使用包含不同nu的不同邻苯二甲酸二丁酯在这些配体的外围或非外围位置上有三个卟啉取代基，而其他未取代的酞菁在这些双层中保持不变，还研究了卟啉取代基的数量和位置对这些光物理过程的影响。

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