Hemicarceplex Formation With a Cyclotriveratrylene-Based Molecular Cage Allows Isolation of High-Purity (≥99.0%) C70 Directly from Fullerene Extracts
摘要:
A cyclotriveratrylene-based molecular cage that favors the formation of a room temperature isolable hemicarceplex with C-70, in the presence of C-60, has been developed. Significant differences in the association and dissociation kinetics of the molecular cage and buckyballs allowed the isolation of C-70 in high purity (>= 99.0%) from a commercial fullerene extract without the need for recrystallization or HPLC.
Hemicarceplex Formation With a Cyclotriveratrylene-Based Molecular Cage Allows Isolation of High-Purity (≥99.0%) C70 Directly from Fullerene Extracts
摘要:
A cyclotriveratrylene-based molecular cage that favors the formation of a room temperature isolable hemicarceplex with C-70, in the presence of C-60, has been developed. Significant differences in the association and dissociation kinetics of the molecular cage and buckyballs allowed the isolation of C-70 in high purity (>= 99.0%) from a commercial fullerene extract without the need for recrystallization or HPLC.
Turn-on Fluorescent Chemosensor Based on an Amino Acid for Pb(II) and Hg(II) Ions in Aqueous Solutions and Role of Tryptophan for Sensing
作者:Lok Nath Neupane、Joo-Young Park、Ju Hun Park、Keun-Hyeung Lee
DOI:10.1021/ol3029516
日期:2013.1.18
This communication presents a fluorescent chemosensor for detecting Pb(II) and Hg(II) in aqueous solutions. The sensor showed a turn-on response to Pb(II) by an enhancement of emission intensity at 380 nm and to Hg(II) by an enhancement of emission intensities at 380 and 475 nm. We have first characterized a unique function of tryptophan as a ligand as well as a quencher for recognition and fluorescent change by a metal binding event.