Influence of cyclic polyamines on silica formation during the Stöber process

文献信息

发布日期 2009-09-22
DOI 10.1039/B915428K
影响因子 3.676
作者

Sylvie Masse, Guillaume Laurent, Thibaud Coradin


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摘要

The interactions of cyclic polyamines with tetraethoxysilane in the conditions of the Stöber synthesis of silica nanoparticles were studied and compared to the behavior of a linear polyamine. Granular core–plain shell hybrid particles were obtained whose morphology and size vary with the nature and amount of added ligand. The influence of polyamines on silica condensation could be understood on the basis of a SN2 reaction involving a pentacoordinated Si complex and depends on the accessibility and nucleophilicity of the ligand. In this case, the polyamine conformation is the key factor determining its ability to activate silica formation. The final size of the hybrid particles was determined by the aggregation of resulting primary nanoparticles that is controlled by electrostatic interactions, and thus depends on the ligand positive charge. These results were compared to biological and biomimetic processes of silica formation where acid–base/electrostatic interactions of silica precursors with linear polyamines have been described.

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来源期刊

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
自引率: 10.3%
年发文量: 3036

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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