sensitize the luminescence of Eu(III) (Q=21 %) and Tb(III) (11 %) in aerated water at pH 7.4. The emission of several other VIS- and NIR-emitting ions, such as Sm(III) (Q=0.38 %) or Yb(III) (0.15 %), for which in cellulo luminescence is evidenced for the first time, is also sensitized. The Eu(III) emission spectrum arises from a main species with pseudo-D(3) symmetry and without coordinated water. The
同位异位
配体6,6'-[亚甲基双(1-甲基-1H-
苯并咪唑-5,2-二基)]双(4- 2- [2-(2-(2-甲氧基乙氧基)乙氧基]乙氧基]乙氧基}
吡啶-2-
羧酸(H(2)L(C2))已量身定制,可与
镧系离子(Ln(III))自组装,从而形成具有整体组成[Ln(2)(L (C2))(3)],并且还提供了用于进一步衍生化的通用平台。聚(氧
乙烯基)基团接枝到
吡啶单元上可确保
水溶性,同时保持可观的热力学稳定性和足够的天线效应,以激发可见光和近红外发射Ln(III)离子。在生理pH和
化学计量条件下,条件稳定性常数(log beta(23))接近25。
配体的三重态具有足够的能量(在约21900 cm(-1)处发生0声子跃迁),可在通气
水中于Eu(III)(Q = 21%)和Tb(III)(11%)发光。 pH值7.4。还可以敏化首次发出
纤维素发光的其他几种VIS和NIR发射离子,例如Sm(III)(Q