title: Selective Colorimetric Detection of Hydrogen Sulfide Based on Primary Amine-Active Ester Cross-Linking of Gold Nanoparticles.
abstract: Hydrogen sulfide (H2S) is a highly toxic environmental pollutant and also an important gaseous transmitter. Therefore, selective detection of H2S is very important, and visual detection of it with the naked eye is preferred in practical applications. In this study, thiolated azido derivates and active esters functionalized gold nanoparticles (AE-AuNPs)-based nanosensors have been successfully prepared for H2S perception. The sensing principle consists of two steps: first, H2S reduces the azide group to a primary amine; second, a cross-linking reaction between the primary amine and active ester induces the aggregation of AuNPs. The AE-AuNPs-based nanosensors show high selectivity toward H2S over other anions and thiols due to the specific azide-H2S chemistry. Under optimal conditions, 0.2 μM H2S is detectable using a UV-vis spectrophotometer, and 4 μM H2S can be easily detected by the naked eye. In addition, the practical application of the designed nanosensors was evaluated with lake water samples.
authors.affiliation: †College of Chemistry and Chemical Engineering, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, P. R. China.|‡Department of Chemistry, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
authors.forename: Zhiqin
authors.initials: Z
authors.lastname: Yuan
authors.affiliation: §International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba 305-0047, Japan.
authors.forename: Fengniu
authors.initials: F
authors.lastname: Lu
authors.affiliation: ¶Metabolic Syndrome Research Center, The Second Xiangya Hospital of Central South University, Changsha 410011, P. R. China.
authors.forename: Meihua
authors.initials: M
authors.lastname: Peng
authors.affiliation: ‡Department of Chemistry, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
authors.forename: Chia-Wei
authors.initials: CW
authors.lastname: Wang
authors.affiliation: ‡Department of Chemistry, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
authors.forename: Yu-Ting
authors.initials: YT
authors.lastname: Tseng
authors.affiliation: ∥Inspection and Testing Center for Agro-product Safety and Environment Quality, Institute of Applied Ecology Chinese Academy of Sciences (IAE CAS), 72 Wenhua Road, Shenyang 110016, P. R. China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Du
authors.affiliation: †College of Chemistry and Chemical Engineering, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, P. R. China.
authors.forename: Na
authors.initials: N
authors.lastname: Cai
authors.affiliation: ‡Department of Chemistry, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
authors.forename: Chia-Wen
authors.initials: CW
authors.lastname: Lien
authors.affiliation: ‡Department of Chemistry, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan.
authors.forename: Huan-Tsung
authors.initials: HT
authors.lastname: Chang
authors.affiliation: †College of Chemistry and Chemical Engineering, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, P. R. China.
authors.forename: Yan
authors.initials: Y
authors.lastname: He
authors.affiliation: †College of Chemistry and Chemical Engineering, College of Biology, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, P. R. China.
authors.forename: Edward S
authors.initials: ES
authors.lastname: Yeung
mesh_terms: D000588:Amines / Q000737:chemistry*; D003124:Colorimetry; D003432:Cross-Linking Reagents / Q000737:chemistry*; D004952:Esters / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D006862:Hydrogen Sulfide / Q000032:analysis*; D053768:Metal Nanoparticles / Q000737:chemistry*
chemical_list: D000588:Amines; D003432:Cross-Linking Reagents; D004952:Esters; D006046:Gold; D006862:Hydrogen Sulfide