Electrofluorochromic Device Based on a Redox-Active Europium(III) Complex
Electrofluorochromic Device Based on a Redox-Active Europium(III) Complex
复制标题
DOI：
10.1021/acsami.0c13765
复制
发表时间：
2020-10-14
影响因子：
9.5
通讯作者：
Hasegawa, Miki
中科院分区：
文献类型：
--
作者：
Kim, Yuna;Ohmagari, Hitomi;Hasegawa, Miki
研究了六齿吡啶衍生物螺旋酸盐配合物（简称EuL）在离子液体中由于中心铕离子的氧化还原反应而产生的电致荧光。典型的电致荧光需要额外的电活性单元来补充分子内或分子间的能量转移以猝灭荧光团。在这里，一个前所未有的简化的电致荧光显色系统克服这些问题，证明通过利用可逆电化学Eu3+和Eu2+之间的EuL，这伴随着大的发射跃迁。用离子液体[BMIM] [PF 6]和EuL混合物制备了三电极电化学开关器件。得益于[BMW] [PF 6]中配体稳定的螺旋配位结构，少量EuL的红色荧光得到了极大的增强，
Electrofluorochromism owing to redox reactions on the center europium (Eu) ion in ionic liquids is examined for the helicate complexes (abbreviated as EuL) with a hexadentate pyridine derivative. Typical electrofluorochromism requires extra electroactive units complementing intra- or intermolecular energy transfer to quench fluorophores. Herein, an unprecedentedly simplified electrofluorochromic system overcoming such issues is demonstrated by utilizing reversible electrochemistry of EuL between Eu3+ and Eu2+, which accompanies large emission transition. A three-electrode electrochemical switching device is facilely prepared with an ionic liquid [BMIM] [PF6] and EuL mixture. Benefiting from the stable helical coordinated structure of the ligand in [BMW] [PF6], highly enhanced red fluorescence of EuL with small quantity (