| 报告题目 | Introduce a Novel Aluminum Cluster and a Smart Encapsulating Material |
| 报告人 | Dr. PAN Long |
| 报告人单位 | Colgate Palmolive Co. |
| 报告时间 | 2014-04-09 |
| 报告地点 | 合肥微尺度物质科学国家实验室一楼科技展厅 |
| 主办单位 | 合肥微尺度物质科学国家实验室、中国科学技术大学化学与材料科学学院 |
| 报告介绍 | 报告摘要：
While a few large species within partially hydrolyzed aluminum solutions of the Keggin type have been isolated and structurally characterized (e.g., epsilon-Al13, delta-Al30, Na-delta-Al13), other known isomers, while speculated, have not yet been identified. The current work utilizes a novel synthetic method first enabling the synthesis of Keggin-type Al structures at high concentrations and then allowing continued trimer rotation to form the gamma-Al13 Keggin molecule. This synthesis used Ca(OH)2 to hydrolyze AlCl3 solution buffered with glycine under reflux. Purity and size distributions of the Al species were checked with size exclusion chromatography. Further hydrothermal treatment with adjusted ratios of starting materials resulted in a solution with one resonance in the Td region of the 27Al NMR spectrum, at 76 ppm. This solution was purified and then treated with sodium sulfate to produce single crystals of the gamma-Al13 structure, exhibiting a peak at 72.0 ppm in solid state 27Al NMR and 76.0 ppm in liquid state 27Al NMR following a metathesis reaction. Characterization techniques and the general procedure are presented.
Metal organic frameworks (MOF) have a number of applications in gas, hydrocarbon sorption and catalysis; however, this type of material has not been utilized for controlled release of fragrance in consumer products. In this work, we not only firstly took advantage of the amphi-sorptive nature of Recyclable Porous Materials (RPM), special type of MOFs, to encapsulate fragrances, but also utilized these porous materials to slowly collapse and release guest fragrances when exposed to moisture. These studies have shown that SMART RPM-Caps do not undergo desorption in the absence of moisture, and that the release of RPM-encapsulated fragrance compounds by moisture is significantly prolonged when compared to free fragrance alone and in fragrance encapsulated with a modified starch (Current market technology). These novel encapsulated materials truly open an avenue for applications in consumer products.
报告人简介：
Dr. Long Pan received his Ph.D. in inorganic chemistry from the USTC. After securing a research Assistant Professor at Rutgers, he joined Colgate Palmolive Co. as a Sr. Research Scientist in 2006. He currently is a Manager of Technology leading a team in developing superior antiperspirant actives and new chemistries for cross-category applications to further strengthen Colgate Technology Innovation pipeline and provide Colgate a competitive advantage. He has been an inventor on 8 granted and 32 pending US/WO patents. In addition, he published over 60 peer-reviewed papers in Angew. Chem., JACS and other prestigious journals that revealed the chemistry behind product innovation. His research has been widely cited in the scientific community (total citation = 4200+, 5 papers > 300 citations). |
