Olszówka Joanna E, Kubat Pavel, Dedecek Jiri, Tabor Edyta
J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 2155/3, 18200 Prague, Czech Republic.
J Phys Chem C Nanomater Interfaces. 2023 Apr 7;127(15):7344-7351. doi: 10.1021/acs.jpcc.3c00585. eCollection 2023 Apr 20.
We show that four cooperating Al atoms located at the two neighboring six-membered (6-MR) rings in the ferrierite framework can be readily discerned by luminescence studies. Thus, luminescent Zn(II) cations accommodated by one aluminum pair of the 6-MR ring can be effectively quenched by neighboring Co(II) ions stabilized by the second ring. Quenching occurs via the energy transfer mechanism and allows estimation of the critical radius of Zn(II)-Co(II) interactions. This points to the appropriate geometry and distance of the transition metal ions accommodated within zeolite, providing direct evidence of the four-aluminum atom arrangement in the ferrierite framework.
我们表明，通过发光研究可以很容易地识别出位于镁碱沸石骨架中两个相邻六元环（6-MR）上的四个协同作用的铝原子。因此，由六元环的一对铝所容纳的发光锌（II）阳离子可以被由第二个环稳定的相邻钴（II）离子有效地淬灭。淬灭通过能量转移机制发生，并允许估计锌（II）-钴（II）相互作用的临界半径。这表明了沸石中容纳的过渡金属离子具有合适的几何形状和距离，为镁碱沸石骨架中四个铝原子的排列提供了直接证据。
