Mechanistic investigation of hydrolysis reactions of dithioacetal derivatives grafted on silica gels

Hee Jung Im; Craig E. Barnes; Sheng Dai; Ziling Xue

doi:10.1016/j.talanta.2003.10.026

Mechanistic investigation of hydrolysis reactions of dithioacetal derivatives grafted on silica gels

Hee Jung Im, Craig E. Barnes, Sheng Dai, Ziling Xue

Chemical Sciences Division

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Silica gels believed to be grafted with dithioacetal derivatives were recently used for Hg(II) extraction, and were found to selectively remove 94-100% of Hg²⁺ ions from metal ion mixtures. The current studies with one derivative suggest that the functional group in the Hg(II) removal is the mercapto (-SH) ligand. The dithioacetal group in (ClCOCH₂S) ₂CHPh (2) was hydrolyzed during its reaction with amine (-O) ₃Si(CH₂)₃NH₂ (3) grafted on silica gel to give the mercapto ligand (-O)₃Si-(CH₂) ₃NHCOCH₂SH (4). The silica gel grafted with the mercapto ligand 4 selectively removed Hg²⁺ ions with reported high capacities.

Original language	English
Pages (from-to)	259-264
Number of pages	6
Journal	Talanta
Volume	63
Issue number	2
DOIs	https://doi.org/10.1016/j.talanta.2003.10.026
State	Published - May 28 2004

Funding

The research reported here was supported by US Department of Energy Environmental Management Science Program (#DE-FG07-97ER14817), US National Science Foundation, and Camille Dreyfus Teacher-Scholar program.

Keywords

Functional silica gels
Hydrolysis of dithioacetals
Mercapto ligands
Mercury(II) separation

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10.1016/j.talanta.2003.10.026

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title = "Mechanistic investigation of hydrolysis reactions of dithioacetal derivatives grafted on silica gels",

abstract = "Silica gels believed to be grafted with dithioacetal derivatives were recently used for Hg(II) extraction, and were found to selectively remove 94-100\% of Hg2+ ions from metal ion mixtures. The current studies with one derivative suggest that the functional group in the Hg(II) removal is the mercapto (-SH) ligand. The dithioacetal group in (ClCOCH2S) 2CHPh (2) was hydrolyzed during its reaction with amine (-O) 3Si(CH2)3NH2 (3) grafted on silica gel to give the mercapto ligand (-O)3Si-(CH2) 3NHCOCH2SH (4). The silica gel grafted with the mercapto ligand 4 selectively removed Hg2+ ions with reported high capacities.",

keywords = "Functional silica gels, Hydrolysis of dithioacetals, Mercapto ligands, Mercury(II) separation",

author = "Im, \{Hee Jung\} and Barnes, \{Craig E.\} and Sheng Dai and Ziling Xue",

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doi = "10.1016/j.talanta.2003.10.026",

language = "English",

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T1 - Mechanistic investigation of hydrolysis reactions of dithioacetal derivatives grafted on silica gels

AU - Im, Hee Jung

AU - Barnes, Craig E.

AU - Dai, Sheng

AU - Xue, Ziling

PY - 2004/5/28

Y1 - 2004/5/28

N2 - Silica gels believed to be grafted with dithioacetal derivatives were recently used for Hg(II) extraction, and were found to selectively remove 94-100% of Hg2+ ions from metal ion mixtures. The current studies with one derivative suggest that the functional group in the Hg(II) removal is the mercapto (-SH) ligand. The dithioacetal group in (ClCOCH2S) 2CHPh (2) was hydrolyzed during its reaction with amine (-O) 3Si(CH2)3NH2 (3) grafted on silica gel to give the mercapto ligand (-O)3Si-(CH2) 3NHCOCH2SH (4). The silica gel grafted with the mercapto ligand 4 selectively removed Hg2+ ions with reported high capacities.

AB - Silica gels believed to be grafted with dithioacetal derivatives were recently used for Hg(II) extraction, and were found to selectively remove 94-100% of Hg2+ ions from metal ion mixtures. The current studies with one derivative suggest that the functional group in the Hg(II) removal is the mercapto (-SH) ligand. The dithioacetal group in (ClCOCH2S) 2CHPh (2) was hydrolyzed during its reaction with amine (-O) 3Si(CH2)3NH2 (3) grafted on silica gel to give the mercapto ligand (-O)3Si-(CH2) 3NHCOCH2SH (4). The silica gel grafted with the mercapto ligand 4 selectively removed Hg2+ ions with reported high capacities.

KW - Functional silica gels

KW - Hydrolysis of dithioacetals

KW - Mercapto ligands

KW - Mercury(II) separation

UR - https://www.scopus.com/pages/publications/2142773118

U2 - 10.1016/j.talanta.2003.10.026

DO - 10.1016/j.talanta.2003.10.026

M3 - Article

AN - SCOPUS:2142773118

SN - 0039-9140

VL - 63

SP - 259

EP - 264

JO - Talanta

JF - Talanta

IS - 2

ER -

Mechanistic investigation of hydrolysis reactions of dithioacetal derivatives grafted on silica gels

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