Browsing by Author "Su, In-Hao"

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A Bifunctional Chromogenic Calix[4]arene Chemosensor for Both Cations and Anions: A Potential Ca(2+) and F(-) Switched INHIBIT Logic Gate with a YES Logic Function
(2010-08-01)
Chang, Kai-Chi
;
Su, In-Hao
;
Wang, Yu-Yun
;
Chung, Wen-Sheng
;
應用化學系
A bifunctional chromogenic calix[4]arene 3, which contains both triazoles and hydroxy azophenols as both cationic and anionic recognition sites and the azophenol moiety as a coloration unit, was designed and synthesized. The recognition of Ca(2+) by 3 gave rise to a marked colour change from greenish to bright yellow, whereas the recognition of F(-) by 3 showed a colour change from light green to bluish. The colour changes of 3 by the inputs of Ca(2+) and F- have been implemented to construct a combinational logic circuit at the molecular level.
A Bifunctional Chromogenic Calix[4]arene Chemosensor for Both Cations and Anions: A Potential Ca2+ and F- Switched INHIBIT Logic Gate with a YES Logic Function
(2010-08-01)
Chang, Kai-Chi
;
Su, In-Hao
;
Wang, Yu-Yun
;
Chung, Wen-Sheng
;
應用化學系
A bifunctional chromogenic calix[4]arene 3, which contains both triazoles and hydroxy azophenols as both cationic and anionic recognition sites and the azophenol moiety as a coloration unit, was designed and synthesized. The recognition of Ca2+ by 3 gave rise to a marked colour change from greenish to bright yellow, whereas the recognition of F- by 3 showed a colour change from light green to bluish. The colour changes of 3 by the inputs of Ca2+ and F- have been implemented to construct a combinational logic circuit at the molecular level.
Triazole- and azo-coupled calix[4]arene as a highly sensitive chromogenic sensor for Ca2+ and Pb2+ ions
(2007-10-08)
Chang, Kai-Chi
;
Su, In-Hao
;
Lee, Gene-Hsiang
;
Chung, Wen-Sheng
;
應用化學系
A novel chromogenic calix[4]arene 3, which has within a molecule both the triazoles and the hydroxyl azophenols as the metal-binding sites and the azophenol moiety as a coloration sites was designed and synthesized. Calix[4]arene 3 is highly sensitive to Ca2+ and Pb+ ions, which can be detected by the naked eye. Furthermore, the association constants for the 1:1 complexes of 3 center dot Ca2+ and 3 center dot Pb2+ were determined to be 7.06 x 104 M-1 and 8.57 x 103 M-1, respectively. (c) 2007 Elsevier Ltd. All rights reserved.
Triazole-modified calix[4]crown as a novel fluorescent on-off switchable chemosensor
(2007-08-16)
Chang, Kai-Chi
;
Su, In-Hao
;
Senthilvelan, Annamalai
;
Chung, Wen-Sheng
;
應用化學系
A novel fluorescent on-off switchable chemosensor 1 with two different types of cationic binding sites is synthesized, which is composed of a triazole-modified calix[4]crown in the 1,3-alternate conformation. Among 15 metal ions examined, the fluorescence of 1 was strongly quenched by Hg2+, Cu2+, Cr3+, and Pb2+; however, the revival of emission from the strongly quenched 1 center dot Pb2+ complex was achievable by the addition of K+, Ba2+, or Zn2+ ions. Thus, metal ion exchange can trigger an on-off switchable fluorescent chemosensor.