High-Boron-Content Porphyrin-Cored Aryl Ether Dendrimers: Controlled Synthesis, Characterization, and Photophysical Properties
作者:Justo Cabrera-González、Elba Xochitiotzi-Flores、Clara Viñas、Francesc Teixidor、Héctor García-Ortega、Norberto Farfán、Rosa Santillan、Teodor Parella、Rosario Núñez
DOI:10.1021/acs.inorgchem.5b00618
日期:2015.5.18
The synthesis and characterization of a set of poly(aryl ether) dendrimers with tetraphenylporphyrin as the core and 4, 8, 16, or 32 closo-carborane clusters are described. A regioselective hydrosilylation reaction on the allyl-terminated functions with carboranylsilanes in the presence of Karstedt’s catalyst leads to different generations of boron-enriched dendrimers. This versatile approach allows
一组聚的合成和表征(芳基醚)与四苯基卟啉为核,4,8,16,或32树枝状闭合碳中描述-carborane簇。在Karstedt催化剂的存在下,用碳硼烷基硅烷对烯丙基末端官能团进行的区域选择性氢化硅烷化反应会导致生成不同世代的富含硼的树枝状大分子。这种通用的方法允许在树枝状聚合物的外围掺入大量的硼原子。通过DOSY NMR实验确定的平移扩散系数(D)可以估算每个树枝状聚合物的流体动力学半径(R H)和分子大小。此外,D之间存在显着的相关性分子量(MW)被发现并可以用来预测它们的整体尺寸和折叠性能。UV-vis和发射行为在很大程度上不受官能度的影响,因此暗示碳硼烷的存在不会改变其光致发光特性。