EFFECTS OF REPLACING SODIUM BY NICKEL IONS IN Y-ZEOLITE - EVIDENCE FROM XE-129 NMR-SPECTROSCOPY
EFFECTS OF REPLACING SODIUM BY NICKEL IONS IN Y-ZEOLITE - EVIDENCE FROM XE-129 NMR-SPECTROSCOPY
复制标题
DOI：
10.1021/j100319a046
复制
发表时间：
1988-04-21
影响因子：
--
通讯作者：
DYBOWSKI, C
中科院分区：
文献类型：
--
作者：
BANSAL, N;DYBOWSKI, C
结论共吸附的Cr 3+、Fe 3+、Cu 2+对Ru（bpy）32+（ads）的猝灭是静态猝灭，反映了玻璃中离子的分布。分布，反过来，反映了与表面的静电相互作用的强度和离子的动力学不稳定性。与弱结合，不稳定的离子，在共吸附的Ru（bpy）32+的存在下，优选的分布是均匀的表面覆盖。因此，最初被吸附的离子会吸附在玻璃的空体积上，直到这些体积的表面覆盖率与浸渍有Ru（bpy）32+（ads）的体积相匹配。在这一点上，离子开始吸附到后者的体积，猝灭成为每克吸附的摩尔数的函数。感谢纽约城市大学研究基金会和国家科学基金会（CHE-8511727）对本研究的支持。HDG感谢康宁玻璃厂提供多孔Vycor玻璃样品。
ConclusionThe quenching of Ru (bpy) 32+(ads) by coadsorbedCr3+, Fe3+, and Cu2+ occurs by static processes and reflects the distribution of the ions within the glass. Distribution, in turn, reflects the strength of the electrostaticinteraction with the surface and the kinetic lability of theion. With weakly bound, labile ions, the preferred distribution in the presence of coadsorbed Ru (bpy) 32+ is one of uniform surface coverage. Consequently, initially adsorbed ions impregnate vacant volumes of the glass until the surface coverage in these volumes matches that inthe volumes impregnated with Ru (bpy) 32+(ads). At that point, the ions begin to adsorb into the latter volumes, and quenching becomes a function of the moles adsorbed per gram.Acknowledgment. Support of this research by the Research Foundation of the City University of New York and the National Science Foundation (CHE-8511727) is gratefully acknowledged. HDG thanks the Corning Glass Works for samples of porous Vycor glass.