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Spectroscopic Recognition of Metal Ions and Non-Linear Optical (NLO) Properties of Some Fluorinated Poly(1,3,4-Oxadiazole-Ether)s. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10050183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In this paper, we examined the sensing ability of some fluorinated 1,3,4-oxadiazole-containing assemblies toward various metal ions and their nonlinear optical (NLO) properties. The changes in the spectral characteristics of these compounds in the existence of Mg2+, Mn2+, Ni2+, Cd2+, Zn2+, Co2+, Cu2+, Hg2+, Sn2+, and Ag+ metal ions were performed, and they were found to be selective and more sensitive toward the addition of Ag+, Co2+, and Cu2+ ions (new bands appeared). Instead, spectral changes in the presence of Mg2+, Mn2+, Ni2+, Cd2+, Zn2+, Hg2+, and Sn2+ were not significant, so we did not evaluate the corresponding binding parameters. Therefore, all of these compounds were found to be selective and sensitive to Ag+, Co2+, and Cu2+ ions. Furthermore, the first-order polarizability (αCT), the first-order hyperpolarizability (βCT), and the second-order hyperpolarizability (γCT) were evaluated using the solvatochromic approach, and the intramolecular charge transfer (ICT) characteristics were investigated using a generalized Mulliken–Hush (GMH) analysis.
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Kim H, Koo B. Lithium sensors based on photophysical changes of 1-aza-12-crown-4 naphthalene derivatives synthesized via Buchwald–Hartwig amination. RSC Adv 2022; 12:31976-31984. [PMCID: PMC9641676 DOI: 10.1039/d2ra05746h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 11/02/2022] [Indexed: 11/11/2022] Open
Abstract
Lithium sensor based on 1-aza-12-crown-4 naphthalene that can detect lithium ions through absorption and emission changes with the detection limit of 21 μM in an organic solvent.
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Affiliation(s)
- Haneul Kim
- Department of Polymer Science and Engineering, Dankook University, Yongin, Gyeonggi 16890, Republic of Korea
| | - Byungjin Koo
- Department of Polymer Science and Engineering, Dankook University, Yongin, Gyeonggi 16890, Republic of Korea
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Ding W, Chen Z, Cao W, Gu Y, Zhang T, Wang C, Li W, Sun F. Copper nanoclusters with/without salicylaldehyde-modulation for multifunctional detection of mercury, cobalt, nitrite and cyanide ions in aqueous solution and bioimaging. NANOTECHNOLOGY 2021; 32:145704. [PMID: 33333493 DOI: 10.1088/1361-6528/abd4a2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The sensitive determination of multiple heavy metal ions and toxic anions is important in biological and environmental fields. Here we report a facile strategy to construct a multifunctional chemosensor for the detection of Hg2+, [Formula: see text]Co2+, and CN- in aqueous solution based on the fluorescent copper nanoclusters (Cu NCs). It was interesting to find that salicylaldehyde (SA) could effectively modulate the fluorescence property and sensing behavior of Cu NCs. In the absence of SA, Cu NCs showed 'on-off' fluorescence responses at the addition of Hg2+ and [Formula: see text] under different quenching mechanisms. Upon the presence of SA, Cu NCs exhibited a strong intramolecular charge transfer emission at 500 nm, accompanied by the decrease of the initial fluorescence of Cu NCs at 430 nm. This fluorescence on-state of Cu NC-SA at 500 nm was found to be exclusively turned off by Co2+ and enhanced by CN-. Spectroscopy results combined with thermodynamic analysis provided sufficient information to deduce the sensing mechanisms. Finally, the Cu NCs showed high biocompatibility and were able to be used for fluorescence bioimaging in living cells. This study provided a novel and simple strategy to construct the multifunctional chemosensors for bioanalytical applications.
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Affiliation(s)
- Weihua Ding
- Medical School, Institute of Reproductive Medicine, Nantong University, Nantong 226001, Jiangsu, People's Republic of China
| | - Zhichuan Chen
- Medical School, Institute of Reproductive Medicine, Nantong University, Nantong 226001, Jiangsu, People's Republic of China
| | - Wei Cao
- Scientific Instrument Center, Shanxi University, Taiyuan 030006, Shanxi, People's Republic of China
| | - Yayun Gu
- Medical School, Institute of Reproductive Medicine, Nantong University, Nantong 226001, Jiangsu, People's Republic of China
| | - Ting Zhang
- Scientific Instrument Center, Shanxi University, Taiyuan 030006, Shanxi, People's Republic of China
| | - Chengniu Wang
- Medical School, Institute of Reproductive Medicine, Nantong University, Nantong 226001, Jiangsu, People's Republic of China
| | - Wenqing Li
- Medical School, Institute of Reproductive Medicine, Nantong University, Nantong 226001, Jiangsu, People's Republic of China
| | - Fei Sun
- Medical School, Institute of Reproductive Medicine, Nantong University, Nantong 226001, Jiangsu, People's Republic of China
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