title: Polyhedral Oligomeric Silsesquioxane Polymer-Caged Silver Nanoparticle as a Smart Colorimetric Probe for the Detection of Hydrogen Sulfide.
abstract: The rapid and accurate detection of hydrogen sulfide is of great concern due to its unique role on environmental pollution and signal transmission in physiological systems. Herein, we report a smart colorimetric probe for the selective detection of H2S. The probe is prepared via a surfactant-free route with cross-linked polyhedral oligomeric silsesquioxane (POSS) polymer cage as capping ligand and reducing agent under microwave irradiation, called poly-POSS-formaldehyde polymer (PPF) cage-AgNPs or PPF-AgNPs for short. The caged silver nanoparticles are well-dispersed with narrow size distribution within 6.0-8.4 nm. Chloride ions and aldehyde groups in PPF make the nucleation and growth of Ag nanoparticles accomplished within a very short time of 1 min. The positively charged PPF-AgNPs exhibit excellent selectivity to H2S against other anionic species and thiols due to the specific Ag-H2S interaction, where the favorable protection effect of PPF polymer cage from the nanoparticle aggregation is demonstrated. The colorimetric probe presents a quick response to H2S (<3 min) and favorable sensitivity within a linear range of 0.7-10 μM along with a detection limit of 0.2 μM. The probe is well demonstrated by analysis of H2S in various water and biological samples.
authors.affiliation: Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University , Box 332, Shenyang, Liaoning 110819, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University , Box 332, Shenyang, Liaoning 110819, China.
authors.forename: Hui-Yan
authors.initials: HY
authors.lastname: Shen
authors.affiliation: Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University , Box 332, Shenyang, Liaoning 110819, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Hai
authors.affiliation: Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University , Box 332, Shenyang, Liaoning 110819, China.
authors.forename: Xu-Wei
authors.initials: XW
authors.lastname: Chen
authors.affiliation: Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Northeastern University , Box 332, Shenyang, Liaoning 110819, China.
authors.forename: Jian-Hua
authors.identifier: 0000-0003-2175-3610
authors.initials: JH
authors.lastname: Wang