15N-pyridine—a mobile NMR sensor for surface acidity and surface defects of mesoporous silica

Molecular Picture of the Adsorption of Ibuprofen and Benzoic Acid on Hydrated Amorphous Silica through DFT-D Calculations Combined with Solid-State NMR Experiments

“…The same slab has been used to build model systems for catalyst supports and adsorption surfaces. 11,15,[37][38][39][40][41][42][43][44][45][46][47][48][49][50] Despite the fact that the global silanol density is higher than the one usually reported for MCM-41 51 , locally the different expected types (terminal and geminal) are present on the model surface, enabling thus, a correct local description of the interaction sites. Bearing in mind that the proportion and type of silanol groups depend on the type of silica; as an example the geminal silanols represent 25% of all silanols for aerosil ® 380 silica while it is only 10% for a mesoporous silica MCM-41 9 , the model is expected to be representative.…”

Removal of DDT from aqueous solutions using mesoporous silica materials

“…First, by forming hydrogen bonds between the hydrophilic part of DDT with OH groups in the inner surfaces of mesoporous silica, 31 DDT molecules are adsorbed on the pore surface of mesoporous silica. This phase is a rapid process, and corresponds with the adsorption phase within the first 2 h (Fig.…”

Application of Advanced Solid‐State NMR Techniques to the Characterization of Nanomaterials: A Focus on Interfaces and Structure

“…Solid-state NMR has been extensively used in the characterization of MMs and some recent review articles have already dedicated some relative attention to this topic [14,[107][108][109]. Generally speaking, the domain of MM is very broad and many NMR studies have investigated specific aspects such as structure [110][111][112][113][114][115][116][117][118][119][120][121][122][123][124], interactions at interfaces [8,[125][126][127][128][129][130][131][132][133][134][135][136][137][138][139][140][141][142][143][144], confinement of organic molecules within nanopores [145][146][147][148][149][150][151]…”

“…• Polar and nonpolar organic molecules: Many contributions to this topic come from the group of Buntkowsky [145,147,150,[155][156][157], who studied d 6 -benzene [145,150], 15 N-pyridine [147,157], and d 6 -isobutyric acid [155] adsorbed on mesoporous materials (SBA-15 and MCM-41 mainly). Recently, a short review article on this topic was published by the same group [156].…”