当前位置: X-MOL 学术Langmuir › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
For Whom a Puddle Is the Sea? Adsorption of Organic Guests on Hydrated MCM-41 Silica.
Langmuir ( IF 3.7 ) Pub Date : 2020-09-08 , DOI: 10.1021/acs.langmuir.0c02327
Ilya G Shenderovich 1
Affiliation  

Thermal and hydration effects on the mobility of compact and branched organic molecules and a bulky pharmaceutical substance loaded in submonolayer amounts onto mesoporous silica have been elucidated using 1H and 31P solid-state NMR. In all cases, the ambient hydration has a stronger effect than an increase in temperature to 370 K for water-free silica. The effect of hydration depends on the guest and ranges from complete solvation to a silica–water–guest sandwich structure to a silica–guest/silica–water pattern. The mobility of the guests under different conditions has been described. The specific structure of the MCM-41 surface allows one to study very slow surface diffusion, a diffusivity of about 10–1510–16 m2/s. The data reported are relevant to any nonfunctionalized silica, while the method used is applicable to any phosphor-containing guest on any host.

中文翻译:

对于谁是水坑?有机客体在水合MCM-41硅胶上的吸附。

使用1 H和31 P固态NMR已阐明了热和水合作用对致密和支链有机分子以及以亚单层量装载到介孔二氧化硅上的大体积药物物质迁移率的影响。在所有情况下,与无水二氧化硅的温度升高至370 K相比,环境水合作用更强。水合作用的效果取决于客体,其范围从完全溶剂化到硅水客混合物结构到硅客水模式。已经描述了在不同条件下客人的活动能力。MCM-41表面的特殊结构使人们可以研究非常缓慢的表面扩散,扩散率约为10 –15 10 –16 m2 /秒 报告的数据与任何未官能化的二氧化硅有关,而所用方法适用于任何主体上的任何含磷的客体。
更新日期:2020-09-29
down
wechat
bug