Design and synthesis of a Cu(II)-complex-based carbazole-hemicyanine hybrid for fluorescent sensing of H 2 S in SDS micellar solution
| Autor: | Qin-chao Xu, Guo-wen Xing, Zhen-yuan Gu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Molecular switch
In situ Fluorophore 010405 organic chemistry Chemistry Carbazole Organic Chemistry Ethylenediamine 010402 general chemistry Photochemistry 01 natural sciences Biochemistry Fluorescence 0104 chemical sciences chemistry.chemical_compound Pulmonary surfactant Drug Discovery Organic chemistry Sodium dodecyl sulfate |
| Zdroj: | Tetrahedron. 73:2123-2130 |
| ISSN: | 0040-4020 |
| DOI: | 10.1016/j.tet.2017.02.060 |
| Popis: | A novel fluorescent chemosensor HACBA with carbazole-hemicyanine fluorophore as signal reporter and N,N,N'-tri(2-pyridylmethyl)ethylenediamine (TPEA) as binding sites was designed and synthesized. Its assemblies with anionic surfactant sodium dodecyl sulfate (SDS) show improved fluorescence emission stability and enhanced fluorescence intensity. HACBA/SDS system can selectively recognize Cu2+, which led to a dramatic fluorescence quenching. The in situ resultant HACBA-Cu(II)/SDS ensemble functioned as a highly selective and sensitive sensor for H2S with a turn-on fluorescent response. Our results show that the “on-off-on” molecular switch occured through the reversible formation-dissociation reaction between HACBA-Cu(II) complex and HACBA/CuS in the SDS micellar solution, and at least 3 cycles of on-off-on switches were observed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect