Chain transfer agents for raft polymerization in aqueous media
申请人:McCormick L. Charles
公开号:US20070123670A1
公开(公告)日:2007-05-31
Polymers and copolymers synthesized by means that yield a narrow range of molecular weights can have different properties than polymers synthesized by conventional means. In order to obtain such polymers, however, polymerization must be controlled. One type of controlled polymerization is the reversible addition-fragmentation chain transfer (RAFT) process, which has characteristics of a living polymerization. The present invention discloses a group of dithioesters and trithioesters suitable as chain transfer agents for RAFT polymerization. The present invention also discloses RAFT polymerizations conducted in aqueous media.
Mixed-Valent Dicobalt and Iron–Cobalt Complexes with High-Spin Configurations and Short Metal–Metal Bonds
作者:Christopher M. Zall、Laura J. Clouston、Victor G. Young、Keying Ding、Hyun Jung Kim、Danylo Zherebetskyy、Yu-Sheng Chen、Eckhard Bill、Laura Gagliardi、Connie C. Lu
DOI:10.1021/ic400292g
日期:2013.8.19
Cobalt–cobalt and iron–cobalt bonds are investigated in coordinationcomplexes with formally mixed-valent [M2]3+ cores. The trigonal dicobalt tris(diphenylformamidinate) compound, Co2(DPhF)3, which was previously reported by Cotton, Murillo, and co-workers (Inorg. Chim. Acta1996, 249, 9), is shown to have an energetically isolated, high-spin sextet ground-state by magnetic susceptibility and electron