Rhodamine B-based turn-on fluorescent and colorimetric chemosensors for highly sensitive and selective detection of mercury (II) ions
Two novel macromolecules based on 2-[3-(2-aminoethylsulfanyl) propylsulfanyl]ethanamine covalently bound to one and two units of rhodamine-B moieties, 1 and 2, were prepared and utilized as fluoroionophores and chromophores for the optical detection of Hg2 ions. The sensors were readily prepared by...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-79961122857&partnerID=40&md5=af6f479ee93ca695da2143587ac399c5 http://cmuir.cmu.ac.th/handle/6653943832/5997 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | Two novel macromolecules based on 2-[3-(2-aminoethylsulfanyl) propylsulfanyl]ethanamine covalently bound to one and two units of rhodamine-B moieties, 1 and 2, were prepared and utilized as fluoroionophores and chromophores for the optical detection of Hg2 ions. The sensors were readily prepared by a conventional two-step synthesis. Especially, sensor 1 exhibits high sensitivity and selective OFFON fluorescence enhancement and chromogenic change upon binding to Hg2, which served as a naked-eye indicator by a noticeable color change of the solution (from colorless to pinkred color). 1 is shown to discriminate various competing metal ions, particularly Ag and Cu2, as well as Cd2, Na, Li, K, Ba2, Co2, Ni2, Mg2, Mn2 and Al3, with a detection limit of 10 ppb. © 2011 Elsevier B.V. All rights reserved. |
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