An Aromatic Oligomer Micelle: Large Enthalpic Stabilization and Selective Oligothiophene Uptake
An Aromatic Oligomer Micelle: Large Enthalpic Stabilization and Selective Oligothiophene Uptake
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DOI：
10.1002/anie.202101453
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发表时间：
2021-04-29
影响因子：
16.6
通讯作者：
Yoshizawa, Michito
中科院分区：
文献类型：
--
作者：
Tsuchida, Yamato;Aratsu, Keisuke;Yoshizawa, Michito
两亲性低聚物由三个弯曲的聚芳两亲物通过两个亲水链交替连接而成，在水中可定量形成具有高稳定性和高吸收能力的芳香低聚物胶束。该胶束结构清晰，直径约为100 μ m。2 nm，即使在高度稀释的条件下也保持完整（约3 μ M）和在高温（>130 ℃）下，由于聚芳族螯合物效应。热力学研究表明，大的热力学增益（Δ H=-110 kJ mol（-1））是胶束形成的关键。低聚物胶束选择性地将未取代的低聚噻吩（>= 4-mer）高度包封，并且所得的水性主-客体复合物显示出源自多重堆叠的低聚物的不寻常的发射。此外，使用低聚物胶束可以实现未取代的聚噻吩的容易吸收和释放。
An aromatic oligomer micelle, featuring both high stability and high uptake ability, was quantitatively formed in water from amphiphilic oligomers, composed of three bent polyaromatic amphiphiles connected alternately by two hydrophilic chains. The well-defined micelle, with a diameter of ca. 2 nm, remains intact even under highly diluted conditions (ca. 3 mu M) and at elevated temperature (>130 degrees C), due to the polyaromatic chelate effect. The thermodynamic studies reveal that large enthalpic gain (Delta H=-110 kJ mol(-1)) is the key for the micelle formation. The oligomer micelle selectively encapsulates unsubstituted oligothiophenes (>= 4-mer) to a high degree and the resultant, aqueous host-guest complexes display unusual emission derived from the multiply stacked oligomers. Furthermore, facile uptake and release of unsubstituted polythiophenes can be achieved using the oligomer micelle.