Metal Complexing Of Ammonia Propyl Silane Hydrolysis - Condensation Cluster Behavior

Organically Modified Siloxane is one of the most important precursors to prepare organic-inorganic hybridized materials, which can produce many hybridized materials with a great diversity of structure and property by hydrolytic condensation reaction at different conditions and sol-gel process. Based on its outstanding chemical inertness, optical transpareney and superior mechnical property this kind of materials have been widely used in optical device, electronic component, biomedicine sensor, catalyze, functional coating, film and so on. In all it has been a research hotspots in the research of material science. The difference of the structure and property of the substitutional group will lead to the change of the precursor in the sol-gel precess. The subsituent effect includes the influence of the hydrolytic condensation reaction rate, the production distribution, the space structure evolution, the exsit state, the molecular self-assemble way and the local microenvironment of sol-gel system. Therefore, systemic and deep researches on the molecular behavior of the hydrolyzate at early stage have important theoretical value for designing and preparing sol-gel materials.To further investigate the influence of the substitutional group to siloxane hydrolysis-condensation clustered. This paper presents that synthesis some organosiloxane precursor containing functional groups some which can identify some small molecules. Study host-guest interaction to adjust the position of the space between the organic siloxane hydrolyzate, and realize the impact on the aggregation behavior. In this study, through the design of3-aminopropyl triethoxy siloxane (APTES) as a precursor, makes it a composition by complexing with transition metal ions though coordination bond, and achieve the regulation of organic siloxane hydrolysis-condensation aggregation behavior, at last to prove the regulation of the material structure and properties by this change. In order to investigate the feasibility of the design ideas, comparativly study before and after coordination of organic siloxane transition and metal the influence of coordination between organic siloxane precursor hydrolysis-condensation reaction evolution processes at the molecular level. Reveals the law of role of hydrolysis-condensation reaction influence by supramolecular. Though comparative study the condensation product morphology which conditions of the functional groups and non-functional groups reveal the rule of product performance influenced by usupramolecular. To this end, This article involves the study and findings are as follows:(1)3-aminopropyl triethoxy siloxane (APTES) as a ligand, transition metal salt solution as the complexing agent, through coordination interaction synthesis a new organosiloxane containing functional groups (transition metal ions). After FT-IR, Thermal analysis, Elemental analysis test and so on. The results show that The product structure obtained in this study is the same as the envisaged.(2) Research the influence to the aggregation behavior in the process of organosiloxane precursor hydrolysis-condensation reaction by host-guest reaction. At room temperature, without any catalyst, copper ions (Cu2+). Cobalt ions (Co2+) is connected to the amino (-NH2) which is a functional groups of alkyl chain in APTES. The results show that after coordination of the organic siloxane hydrolysis condensation rate is greatly increased. Though FT-IR test, the result shows that the APTES are easily hydrolysised after added transition metal ions.(3) The morphology and crystalline phase of the ligand precursor before and after hydrolysis-condensation product were characterized by SEM and XRD. SEM results showed that the precursor gels are micro-spherical morphology after coordination. XRD test showed that the structure of the gel is more amorphous compared coordination. It shows that coordination plays a role of the internal structure of the gels.