时间：2013年4月23日（星期二）上午9：30 ~ 10：30

地点：科技创新大楼A506报告厅

题目：Sustainable Pathways to Organics and Nanomaterials

报告人：Dr. Rajender S. Varma
U.S. Environmental Protection Agency

报告内容简介

Sustainable chemical synthetic activity involving alternate energy input, and greener reaction medium in aqueous or solvent-free conditions will be summarized for heterocyclic compounds, cross coupling reactions, and a variety of named organic reactions; these reactions are catalyzed by basic water or recyclable and reusable magnetic nano-catalysts in aqueous media using microwave (MW) irradiation.
Vitamins B₁, B₂, C, and tea, beet juice and wine polyphenols which function both as reducing and capping agents, provide extremely simple, one-pot, green synthetic methods to bulk quantities of nanomaterials in water. Shape-controlled synthesis of noble nanostructures via MW-assisted spontaneous reduction of noble metal salts using sugars will be presented.MW cross-linking reaction of poly (vinyl alcohol) (PVA) with metallic systems; bimetallic systems, and SWNT, MWNT, and C₆₀and the formation of biodegradable carboxymethylcellulose (CMC) composite films with noble nanometals; and the shape-controlled bulk synthesis of Ag and Fe nanorods in poly (ethylene glycol) will be described. MW hydrothermal process delivers magnetic nanoferrites and micro-pine structured catalysts are obtainable in water from readily available metal salts. Sustainable route to nanoparticles using polyphenols from winery waste, or biodiesel byproduct, glycerol and their applications in catalysis, toxicity and environmental remediation will be highlighted.