Synthesis and Electronic Properties of 1,2‐Hemisquarimines and Their Encapsulation in a Cucurbit[7]uril Host
作者:Christian C. De Filippo、Hao Tang、Luca Ravotto、Giacomo Bergamini、Patrizio Salice、Miriam Mba、Paola Ceroni、Elena Galoppini、Michele Maggini
DOI:10.1002/chem.201400039
日期:2014.5.19
redshift of both absorption and emission maxima, with a concomitant increase in the lifetime of the emitting excited state. Encapsulation of the chromophore into a cucurbit[7]uril host revealed fluorescence enhancement and increased photostability in water. The redox characteristics of 1,2‐HSQiMs indicate that charge injection into TiO2 is possible; this opens up promising perspectives for their use as photosensitizers
据报道,通过苯胺衍生物与1,2-方酸的核心的微波辅助缩合反应,合成了一类新的强健的方酸方染料,俗称1,2-半方酸(1,2-HSQiMs)。在CH 3 CN,1,2- HSQiMs示出了具有高的消光系数的宽吸收带,并在围绕最大λ = 530纳米,以及一个发射带集中在大约λ= 574nm,这是pH依赖性的。亚胺氮的质子化导致吸收和发射最大值的红移,同时伴随着发射激发态寿命的增加。将生色团包封在葫芦[7]尿嘧啶宿主中显示出荧光增强和在水中的光稳定性增加。1,2-HSQiMs的氧化还原特性表明可以将电荷注入TiO 2中。这为将其用作太阳能转化的光敏剂开辟了广阔的前景。