Ultra-selective detection of Fe2+ ion by redox mechanism based onfluorescent polymerized dopamine derivatives

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486669.do
DOI
10.1039/c7ra04107a
Title
Ultra-selective detection of Fe2+ ion by redox mechanism based onfluorescent polymerized dopamine derivatives
Description
This work was supported by the Ministry of Science, ICT & FuturePlanning and National Research Foundation of Korea through Basic ScienceResearch Program (NRF-2014R1A1A1006711 and NRF-2015R1D1A1A01059367), theMinistry of Trade, Industry & Energy (MOTIE), Korea Institute forAdvancement of Technology (KIAT) through the Encouragement Program forThe Industries of Economic Cooperation Region (R0004027) and KangwonNational University through 2015 Research Grant (No. 520150081).
abstract
Polydopamine (PDA) is considered as a fluorescent molecule, however, the molecular structure and degree of polymerization that yield the most efficient fluorescence have yet to be identified. Here, we first present the fluorescence origin of polymerized dopamine derivatives (pDA) and their extraordinary behavior on the ultra-selective recognition of Fe2+ ions. Dopamine molecules are polymerized to 5,6-dihydroxyindole-rich pDA in basic conditions, followed by readily oxidizing to indole-5,6-quinone-rich pDA by dropping the pH to strongly acidic conditions. It was clearly demonstrated that oligomeric dopamine molecules were water-soluble with intense fluorescence (F-ODA, n = 3-4), while polymeric dopamine molecules were water-insoluble without fluorescence (PDA, n > 5). Also, F-ODA was dramatically selective to Fe2+ ions contradicting previous studies, and their unique binding mechanism was described through the redox potential analysis.
provenance
Made available in Cube on 2018-09-28T16:13:46Z (GMT). No. of bitstreams: 0
language
English
author
An, Taeuk
Lee, Namhun
Cho, Hong-Jun
Kim, Seongsoo
Shin, Dong-Sik
Lee, Sang-Myung
orcid
Shin, Dong-Sik/0000-0001-8101-0793
accessioned
2018-09-28T16:13:46Z
available
2018-09-28T16:13:46Z
issued
2017
citation
RSC ADVANCES(7): 49
issn
2046-2069
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486669.do
Funder
산업통상자원부
Funding Program
경제협력권산업육성
Project ID
1415154238
Jurisdiction
Rep.of Korea
Project Name
Development of hospital healthcare POCT for senior-disease
rights
openAccess
type
article


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