Polyanionic Aryl Ether Metallodendrimers Based on Cobaltabisdicarbollide Derivatives. Photoluminescent Properties
Polyanionic Aryl Ether Metallodendrimers Based on Cobaltabisdicarbollide Derivatives. Photoluminescent Properties
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DOI：
10.1021/ma9019575
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发表时间：
2010-01
期刊：
影响因子：
5.5
通讯作者：
E. J. Juárez-Pérez;C. Viňas;F. Teixidor;R. Santillán;N. Fárfan;A. Abreu;Rebeca Yépez;R. Núñez
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文献类型：
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作者：
E. J. Juárez-Pérez;C. Viňas;F. Teixidor;R. Santillán;N. Fárfan;A. Abreu;Rebeca Yépez;R. Núñez
以1，3，5-三苯基苯为核分子，末端含有3，6，9或12个烯丙基醚基团的荧光Frechet型聚芳醚树枝状大分子，通过Frechet收敛方法以很好的产率合成。双卡宾钴衍生物Cs[1，1 ′-μ-SiMeH-3，3 ′-Co（1，2-C2B 9 H10）2]与烯丙基醚官能团的区域特异性氢甲酰化反应，得到了不同代的由3、6和9个双卡宾钴单元修饰的Fechet型聚阴离子金属树枝状聚合物。起始树枝状聚合物在室温下在紫外线照射下表现出光致发光性质;然而，在用cobaltabisdicarbolide衍生物官能化后，荧光性质被淬灭。产品通过FTIR、NMR和UV-维斯光谱进行充分表征。对于金属树枝状聚合物，紫外-维斯光谱是一个很好的工具，用于估计实验中连接到树枝状结构周围的钴双卡宾单元的数量。
Fluorescent Frechet-type poly(aryl ether) dendrimers that incorporate the 1,3,5-triphenylbenzene as core molecule and 3, 6, 9, or 12 terminal allyl ether groups have been prepared in very good yield by following the Frechet convergent approach. Regiospecific hydrosylilation reactions on the allyl ether functions with the cobaltabisdicarbollide derivative Cs[1,1′-μ-SiMeH-3,3′-Co(1,2-C2B9H10)2] lead to different generations of Fechet-type polyanionic metallodendrimers decorated with 3, 6, and 9 cobaltabisdicarbollide units. Starting dendrimers exhibit photoluminescence properties at room temperature under ultraviolet irradiation; nevertheless, after functionalization with cobaltabisdicarbollide derivatives, the fluorescence properties are quenched. Products are fully characterized by FTIR, NMR, and UV−vis spectroscopies. For metallodendrimers, the UV−vis absorptions have been a good tool for estimating the experimental number of cobaltabisdicarbollide units peripherally attached to the dendrimeric structure...