Preparation of ORMOSIL particles with controlled amounts of binary organic functional groups and their application to colorimetric sensors for cadmium ion

Jung Min Ha, Sun Teak Kim, Seong Je Jeon, Sang Man Koo

Research output: Contribution to journalArticle

Abstract

Binary functional ORMOSIL particles were prepared by the one pot process using organosilane mixtures of mercaptopropyltrimethoxysilanes and vinyltrimethoxysilanes. Colorimetric cadmium ion sensors were then prepared by immobilizing α,β,γ,δ–tetrakis(1-methylpyridinium-4-yl)porphine-p-toluenesulfonate molecules in ORMOSIL particles containing a controllable amount of mercaptopropylsilanes that served as binding sites. The relative amount of mercaptopropyl and vinyl functionalities in particles were controlled by adjusting molar ratios of organosilanes and thereby the amount of immobilized TMPyP molecules was easily controlled, which allowed a facile control of the detection range and sensitivity toward Cd ion detection. A particle sensor grid capable of colorimetric detection of Cd ions in a concentration range from 10 ppb to 5 ppm was constructed by combining three cadmium sensors with a different amount of mercaptopropylsilanes and showed distinctive visible color changes in a different concentration range of cadmium ions. Recycled sensor particles exhibited almost the same sensing performance as freshly prepared ones.

Original languageEnglish
Pages (from-to)635-642
Number of pages8
JournalJournal of Ceramic Processing Research
Volume16
Issue number5
StatePublished - 2015 Jan 1

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Cadmium
Functional groups
Ions
Sensors
Molecules
Binding sites
Binding Sites
Color

Keywords

  • Binary ORMOSIL particles
  • Cadmium ion
  • Colorimetric sensor
  • Organic functional groups

Cite this

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title = "Preparation of ORMOSIL particles with controlled amounts of binary organic functional groups and their application to colorimetric sensors for cadmium ion",
abstract = "Binary functional ORMOSIL particles were prepared by the one pot process using organosilane mixtures of mercaptopropyltrimethoxysilanes and vinyltrimethoxysilanes. Colorimetric cadmium ion sensors were then prepared by immobilizing α,β,γ,δ–tetrakis(1-methylpyridinium-4-yl)porphine-p-toluenesulfonate molecules in ORMOSIL particles containing a controllable amount of mercaptopropylsilanes that served as binding sites. The relative amount of mercaptopropyl and vinyl functionalities in particles were controlled by adjusting molar ratios of organosilanes and thereby the amount of immobilized TMPyP molecules was easily controlled, which allowed a facile control of the detection range and sensitivity toward Cd ion detection. A particle sensor grid capable of colorimetric detection of Cd ions in a concentration range from 10 ppb to 5 ppm was constructed by combining three cadmium sensors with a different amount of mercaptopropylsilanes and showed distinctive visible color changes in a different concentration range of cadmium ions. Recycled sensor particles exhibited almost the same sensing performance as freshly prepared ones.",
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Preparation of ORMOSIL particles with controlled amounts of binary organic functional groups and their application to colorimetric sensors for cadmium ion. / Ha, Jung Min; Kim, Sun Teak; Jeon, Seong Je; Koo, Sang Man.

In: Journal of Ceramic Processing Research, Vol. 16, No. 5, 01.01.2015, p. 635-642.

Research output: Contribution to journalArticle

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T1 - Preparation of ORMOSIL particles with controlled amounts of binary organic functional groups and their application to colorimetric sensors for cadmium ion

AU - Ha, Jung Min

AU - Kim, Sun Teak

AU - Jeon, Seong Je

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AB - Binary functional ORMOSIL particles were prepared by the one pot process using organosilane mixtures of mercaptopropyltrimethoxysilanes and vinyltrimethoxysilanes. Colorimetric cadmium ion sensors were then prepared by immobilizing α,β,γ,δ–tetrakis(1-methylpyridinium-4-yl)porphine-p-toluenesulfonate molecules in ORMOSIL particles containing a controllable amount of mercaptopropylsilanes that served as binding sites. The relative amount of mercaptopropyl and vinyl functionalities in particles were controlled by adjusting molar ratios of organosilanes and thereby the amount of immobilized TMPyP molecules was easily controlled, which allowed a facile control of the detection range and sensitivity toward Cd ion detection. A particle sensor grid capable of colorimetric detection of Cd ions in a concentration range from 10 ppb to 5 ppm was constructed by combining three cadmium sensors with a different amount of mercaptopropylsilanes and showed distinctive visible color changes in a different concentration range of cadmium ions. Recycled sensor particles exhibited almost the same sensing performance as freshly prepared ones.

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