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Zhang M, Deng C, Chen J, Liang S. Facile preparation of a hydrophilic Eu-based ratiometric fluorescent nanosensor for Cu 2+ ion detection and imaging in living cells. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2025; 17:944-954. [PMID: 39745582 DOI: 10.1039/d4ay01984a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2025]
Abstract
In this work, a hydrophilic Eu-based ratiometric fluorescent nanosensor (PAAC-Eu) was developed for Cu2+ ion detection in aqueous solutions and imaging in living cells. The sensor was prepared via a simple one-step reaction at room temperature, leveraging the synergistic coordination of commercially accessible polyacrylic acid (PAA) and coumarin-3-carboxylic acid (CCAH) with Eu3+ ions. PAAC-Eu was easy to disperse in aqueous media and exhibited two characteristic emission bands at 406 nm and 618 nm, respectively, upon excitation at 350 nm. Cu2+ ions could bind with the free carboxyl groups in PAAC-Eu within 10 min, leading to a decrease in fluorescence at 618 nm (I618) and a negligible effect on fluorescence at 406 nm (I406). Accordingly, a rapid, sensitive and selective method for detecting Cu2+ ions was established, which could complete Cu2+ ion assay within 30 min. A good linear relationship was observed between I406/I618 and Cu2+ ion concentration at 0-20.0 μM (0-1.28 mg L-1) with a detection limit as low as 0.175 μM (11.2 μg L-1). The proposed method was successfully applied to quantify Cu2+ ions in real water samples. Moreover, a portable paper-based sensor was developed by loading PAAC-Eu in filter paper, which could enable visual detection of Cu2+ ions without using large instruments. Finally, cell experiments demonstrated the low cytotoxicity and good cell permeability of PAAC-Eu, and ratiometric fluorescence imaging of Cu2+ ions in living cells was successfully performed.
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Affiliation(s)
- Moru Zhang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430072, China.
| | - Chunyun Deng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430072, China.
| | - Jing Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430072, China.
| | - Shucai Liang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Ministry of Education), School of Pharmaceutical Sciences, Wuhan University, Wuhan, 430072, China.
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Aldakhil F, Alarfaj NA, Al-Tamimi SA, El-Tohamy MF. Development of silver-doped carbon dots sensor derived from lignin for dual-mode fluorometric and spectrophotometric determination of valsartan in a bulk powder and a commercial product. Heliyon 2024; 10:e40848. [PMID: 39687104 PMCID: PMC11648884 DOI: 10.1016/j.heliyon.2024.e40848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 09/10/2024] [Accepted: 11/28/2024] [Indexed: 12/18/2024] Open
Abstract
Doping of carbon dots (CDs) with heteroatoms has garnered growing attention in recent years as a useful method of controlling their physicochemical properties. In this study, a new dual-mode sensor based on silver-doped CDs (AgCDs) derived from lignin was developed for fluorometric and spectrophotometric determination of valsartan (VAL). The analysis of AgCDs revealed a structure that closely resembled graphene oxide, with the successful doping of Ag. The mean particle size of AgCDs was 3.50 ± 0.89 nm and it exhibited a reasonable fluorescence quantum yield of 28.1 %. The emission at 612 nm of AgCDs is quenched by VAL after being excited at 275 nm due to a combination of dynamic and static quenching mechanisms. The enhancement in the absorbance of AgCDs upon the addition of the medication was measured at 275 nm. The most favorable circumstances for the dual-mode sensing were achieved with a pH of 8 and a volume of 0.10 mL of AgCDs. The measurements were conducted using fluorometry after 3 min at 10 °C, followed by spectrophotometry after 7 min at 20 °C. The fluorometric data indicated a linear response within the range of 2.0-50.0 μg/mL, while the spectrophotometric results showed a dynamic range of 5.0-100.0 μg/mL. The limits of detection (LODs) were 0.57 and 1.38 μg/mL for the fluorometric and spectrophotometric methods, respectively. The limits of quantification (LOQs) were 1.72 and 4.19 μg/mL for the fluorometric and spectrophotometric methods, respectively. The nano sensor efficiently assessed the presence of VAL in pharmaceutical tablets and produced a favorable outcome with the mean of recovery of 98.91 % and 99.76 % with relative standard deviation (RSD%) of 0.79 and 0.78 for the fluorometric and spectrophotometric methods, respectively.
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Affiliation(s)
- Fatemah Aldakhil
- Department of Chemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
| | - Nawal A. Alarfaj
- Department of Chemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
| | - Salma A. Al-Tamimi
- Department of Chemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
| | - Maha F. El-Tohamy
- Department of Chemistry, College of Science, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia
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Das B, Bora SR, Bishen SM, Mishra H, Kalita DJ, Wahab A. Photophysics of a Monoannulated Indigo: Intra- and Intermolecular Charge Transfer. J Phys Chem A 2024; 128:2565-2573. [PMID: 38513220 DOI: 10.1021/acs.jpca.3c07763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
In the present work, the photoinduced charge-transfer (CT) behavior of 7-phenyl-6H-pyrido[1,2-a:3,4-b']diindole-6,13(12H)-dione (HCB) as a function of solvent polarity is reported by UV-vis absorption, steady-state and time-resolved fluorescence, and quantum chemical calculations. Calculated excited state energies of HCB at the B3PW91/6-31+G* level in vacuo and in solvents fulfill the energy requirements for singlet fission, which is the most promising path for the generation of highly efficient solar cells. The calculated potential energy curve for the compound reveals that the keto form is the predominant form in the ground state. Large bathochromic shifts in fluorescence with decreasing trends of quantum yield and lifetime indicate the occurrence of intramolecular CT from the indole bicycle to the indolinone moiety of HCB in highly polar solvents. The observed quenching of HCB fluorescence in different solvents without altering the spectral shape upon addition of a donor, triethylamine, is attributed to intermolecular CT, and it was examined in terms of the Stern-Volmer kinetics. The thermodynamics of photoinduced CT processes in HCB was analyzed using the measured photophysical data and cyclic voltammetric redox potentials via the Rehm-Weller equation. Analyses with the semiclassical Marcus theory suggest that both the CT processes fall under the Marcus normal region.
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Affiliation(s)
- Bidyut Das
- Department of Chemistry, Cotton University, Guwahati 781 001, Assam, India
| | - Smiti Rani Bora
- Department of Chemistry, Gauhati University, Guwahati 781 014, Assam, India
| | - Siddharth Mall Bishen
- Physics Section MMV, Department of Physics, Banaras Hindu University, Varanasi 221 005, India
| | - Hirdyesh Mishra
- Physics Section MMV, Department of Physics, Banaras Hindu University, Varanasi 221 005, India
| | | | - Abdul Wahab
- Department of Chemistry, Cotton University, Guwahati 781 001, Assam, India
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Sasaki Y, Lyu X, Kawashima T, Zhang Y, Ohshiro K, Okabe K, Tsuchiya K, Minami T. Nanoarchitectonics of highly dispersed polythiophene on paper for accurate quantitative detection of metal ions. RSC Adv 2024; 14:5159-5166. [PMID: 38332791 PMCID: PMC10851342 DOI: 10.1039/d3ra08429a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 01/23/2024] [Indexed: 02/10/2024] Open
Abstract
π-Conjugated polymers such as polythiophene provide intramolecular wire effects upon analyte capture, which contribute to sensitive detection in chemical sensing. However, inherent aggregation-induced quenching causes difficulty in fluorescent chemical sensing in the solid state. Herein, we propose a solid-state fluorescent chemosensor array device made of a paper substrate (PCSAD) for the qualitative and quantitative detection of metal ions. A polythiophene derivative modified by dipicolylamine moieties (1poly), which shows optical changes upon the addition of target metal ions (i.e., Cu2+, Cd2+, Ni2+, Co2+, Pb2+, Zn2+, and Hg2+), was highly dispersed on the paper substrate using office apparatus. In this regard, morphological observation of the PCSAD after printing of 1poly suggested the contribution of the fiber structures of the paper substrate to the homogeneous dispersion of 1poly ink to suppress aggregation-induced quenching. The optical changes in the PCSAD upon the addition of metal ions was rapidly recorded using a smartphone, which was further applied to imaging analysis and pattern recognition techniques for high-throughput sensing. Indeed, the printed PCSAD embedded with 1poly achieved the accurate detection of metal ions at ppm levels contained in river water. The limit of detection of the PCSAD-based sensing system using a smartphone (48 ppb for Cu2+ ions) is comparable to that of a solution-based sensing system using a stationary spectrophotometer (16 ppb for Cu2+ ions). Therefore, the methodology based on a combination of a paper-based sensor array and a π-conjugated polymer will be a promising approach for solid-state fluorescent chemosensors.
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Affiliation(s)
- Yui Sasaki
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
- JST, PRESTO 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
| | - Xiaojun Lyu
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Takayuki Kawashima
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Yijing Zhang
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Kohei Ohshiro
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Kiyosumi Okabe
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Kazuhiko Tsuchiya
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
| | - Tsuyoshi Minami
- Institute of Industrial Science, The University of Tokyo 4-6-1 Komaba, Meguro-ku Tokyo 153-8505 Japan
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Xie J, Kim HM, Kamada K, Oh JM. Blood Compatibility of Drug-Inorganic Hybrid in Human Blood: Red Blood Cell Hitchhiking and Soft Protein Corona. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6523. [PMID: 37834660 PMCID: PMC10573551 DOI: 10.3390/ma16196523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/16/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023]
Abstract
A drug-delivery system consisting of an inorganic host-layered double hydroxide (LDH)-and an anticancer drug-methotrexate (MTX)-was prepared via the intercalation route (MTX-LDH), and its hematocompatibility was investigated. Hemolysis, a red blood cell counting assay, and optical microscopy revealed that the MTX-LDH had no harmful toxic effect on blood cells. Both scanning electron microscopy and atomic force microscopy exhibited that the MTX-LDH particles softly landed on the concave part inred blood cells without serious morphological changes of the cells. The time-dependent change in the surface charge and hydrodynamic radius of MTX-LDH in the plasma condition demonstrated that the proteins can be gently adsorbed on the MTX-LDH particles, possibly through protein corona, giving rise to good colloidal stability. The fluorescence quenching assay was carried out to monitor the interaction between MTX-LDH and plasma protein, and the result showed that the MTX-LDH had less dynamic interaction with protein compared with MTX alone, due to the capsule moiety of the LDH host. It was verified by a quartz crystal microbalance assay that the surface interaction between MTX-LDH and protein was reversible and reproducible, and the type of protein corona was a soft one, having flexibility toward the biological environment.
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Affiliation(s)
- Jing Xie
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea;
| | - Hyoung-Mi Kim
- Biomedical Manufacturing Technology Center, Daegyeong Division, Korea Institute of Industrial Technology (KITECH), Yeongcheon-si 38822, Republic of Korea;
| | - Kai Kamada
- Department of Materials Science and Engineering, Faculty of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Jae-Min Oh
- Department of Energy and Materials Engineering, Dongguk University-Seoul, Seoul 04620, Republic of Korea;
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Demay-Drouhard P, Gaffen JR, Caputo CB, Baumgartner T. Fluorescence-based measurement of the Lewis acidities of lanthanide triflates in solution. CAN J CHEM 2022. [DOI: 10.1139/cjc-2022-0115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Despite the prominence of rare-earth complexes to act as Lewis acid catalysts in organic synthesis, the comprehensive measure of the Lewis acid strength of such compounds has yet to be performed due to incompatibilities with existing methods. We report our results in measurement of a sequence of lanthanide triflates via our recently established fluorescent Lewis adduct (FLA) method. The persistence in solution of these Lewis acids as solvated coordination complexes is accurately measurable by the FLA method. However, several of the rare-earth species exhibit fluorescence quenching, which may potentially inhibit the measurement. Nevertheless, meaningful FLA measurements were still possible, and the results correspond to both periodic trends and were even consistent with previous correlated reported data.
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Affiliation(s)
- Paul Demay-Drouhard
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada
| | - Joshua R. Gaffen
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada
| | - Christopher B. Caputo
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada
| | - Thomas Baumgartner
- Department of Chemistry, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada
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Wang TT, Liu JY, Guo R, An JD, Huo JZ, Liu YY, Shi W, Ding B. Solvothermal Preparation of a Lanthanide Metal-Organic Framework for Highly Sensitive Discrimination of Nitrofurantoin and l-Tyrosine. Molecules 2021; 26:molecules26123673. [PMID: 34208577 PMCID: PMC8233945 DOI: 10.3390/molecules26123673] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 11/16/2022] Open
Abstract
Metal-organic frameworks (MOFs) have been rapidly developed for their broad applications in many different chemistry and materials fields. In this work, a multi-dentate building block 5-(4-(tetrazol-5-yl)phenyl)-isophthalic acid (H3L) containing tetrazole and carbolxylate moieties was employed for the synthesis of a two-dimensional (2D) lanthanide MOF [La(HL)(DMF)2(NO3)] (DMF = N,N-dimethylformamide) (1) under solvothermal condition. The fluorescent sensing application of 1 was investigated. 1 exhibits high sensitivity recognition for antibiotic nitrofurantoin (Ksv: 3.0 × 103 M−1 and detection limit: 17.0 μM) and amino acid l-tyrosine (Ksv: 1.4 × 104 M−1 and detection limit: 3.6 μM). This work provides a feasible detection platform of 2D MOFs for highly sensitive discrimination of antibiotics and amino acids.
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Affiliation(s)
- Tian-Tian Wang
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, China; (T.-T.W.); (J.-Y.L.); (R.G.); (J.-D.A.); (J.-Z.H.); (Y.-Y.L.)
| | - Jing-Yi Liu
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, China; (T.-T.W.); (J.-Y.L.); (R.G.); (J.-D.A.); (J.-Z.H.); (Y.-Y.L.)
| | - Rui Guo
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, China; (T.-T.W.); (J.-Y.L.); (R.G.); (J.-D.A.); (J.-Z.H.); (Y.-Y.L.)
| | - Jun-Dan An
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, China; (T.-T.W.); (J.-Y.L.); (R.G.); (J.-D.A.); (J.-Z.H.); (Y.-Y.L.)
| | - Jian-Zhong Huo
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, China; (T.-T.W.); (J.-Y.L.); (R.G.); (J.-D.A.); (J.-Z.H.); (Y.-Y.L.)
| | - Yuan-Yuan Liu
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, China; (T.-T.W.); (J.-Y.L.); (R.G.); (J.-D.A.); (J.-Z.H.); (Y.-Y.L.)
| | - Wei Shi
- Department of Chemistry and Key Laboratory of Advanced Energy Materials Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
- Correspondence: (W.S.); (B.D.)
| | - Bin Ding
- Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, College of Chemistry, Tianjin Normal University, 393 Binshui West Road, Tianjin 300387, China; (T.-T.W.); (J.-Y.L.); (R.G.); (J.-D.A.); (J.-Z.H.); (Y.-Y.L.)
- Correspondence: (W.S.); (B.D.)
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Gromak NA, Kolokolov FA, Dotsenko VV, Aksenov NA, Aksenova IV. Synthesis and Luminescent Properties of Eu3+ and Tb3+ Complexes with Coumarin-3-carboxylic Acids. RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363221040174] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Georgieva I, Zahariev T, Aquino AJA, Trendafilova N, Lischka H. Energy transfer mechanism in luminescence Eu(III) and Tb(III) complexes of coumarin-3-carboxylic acid: A theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 240:118591. [PMID: 32585405 DOI: 10.1016/j.saa.2020.118591] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 06/03/2020] [Accepted: 06/06/2020] [Indexed: 06/11/2023]
Abstract
Excited state energy level diagrams of coumarin-3-carboxylic acid (HCCA) chromophore, Eu(CCA)Cl2(H2O)2 (1), Eu(CCA)2Cl(H2O)2 (2), Eu(CCA)3(H2O)3 (3), Tb(CCA)2Cl(H2O) (4) and Tb(CCA)2(NO3)(H2O) (5) in gas phase and polar solution have been calculated by means of DFT/TDDFT/ωB97XD methods. Based on these results, the ability of CCA to sensitize Eu(III) and Tb(III) luminescence has been examined. The competitive excited state processes in the complexes - fluorescence, intersystem crossing (ISC) and phosphorescence, were analyzed depending on the environment, number of the ligands, Ln(III) ion type (Eu and Tb) and counteranion (Cl- and NO3-). It has been found that the environment altered the S1 state energy, oscillator strength, fluorescence lifetime as well as the S1 character - polar solution stabilized the S1(ππ*) state, whereas non-polar solution (gas phase, solid state) stabilized the S1(nπ*) state. The S1(nπ*) state was decisive for the efficient energy transfer as it suppressed the S1 emission of CCA and favored ISC or direct transfer to the emitting levels of Eu(III). The HCCA triplet (T1) state minimum energy (~2.7, ~2.6ZPE eV) and (ππ*) character were retained in Eu/Tb-CCA complexes regardless of the environment. The energy gap between the higher energy T1 donor state and the acceptor levels 5D1 of Eu(III) (~0.5 eV) and 5D4 of Tb(III) (~0.1 eV) provided optimal resonance conditions for effective energy transfer for Eu(III), but less probability for Tb(III). The nonradiative energy (CCA → Eu(III)) transfer rates and quantum luminescence yield for 2 and 3 were calculated by a strategy combining DFT geometries, INDO/S excitation energies and calculated Judd-Ofelt parameters. The excitation channel T1 → 5D0 through an exchange mechanism was predicted as the most probable one to populate the main emissive Eu-centered state in complexes 2 and 3. The more efficient luminescence of 3 than that of 2 was discussed and explained.
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Affiliation(s)
- Ivelina Georgieva
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev, Str. Bld 11, Sofia 1113, Bulgaria.
| | - Tsvetan Zahariev
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev, Str. Bld 11, Sofia 1113, Bulgaria
| | - Adelia J A Aquino
- Department of Mechanical Engineering, Texas Tech University, Lubbock, TX 79409, USA; School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Natasha Trendafilova
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev, Str. Bld 11, Sofia 1113, Bulgaria
| | - Hans Lischka
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409-1061, USA
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Lo M, Diaw AKD, Gningue-Sall D, Oturan MA, Chehimi MM, Aaron JJ. A novel fluorescent sensor based on electrosynthesized benzene sulfonic acid-doped polypyrrole for determination of Pb(II) and Cu(II). LUMINESCENCE 2019; 34:489-499. [PMID: 30972923 DOI: 10.1002/bio.3626] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/17/2018] [Accepted: 02/08/2019] [Indexed: 01/22/2023]
Abstract
To develop conducting organic polymers (COPs) as luminescent sensors for determination of toxic heavy metals, a new benzene sulfonic acid-doped polypyrrole (PPy-BSA) thin film was electrochemically prepared by cyclic voltammetry (CV) on flexible indium tin oxide (ITO) electrode in aqueous solution. PPy-BSA film was characterized by FTIR spectrometry, X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The optical properties of PPy-BSA were investigated by ultraviolet (UV)-visible absorption and fluorescence spectrometry in dimethylsulfoxide (DMSO) diluted solutions. PPy-BSA fluorescence spectra were strongly quenched upon increasing copper(II) ion (Cu2+ ) and lead(II) ion (Pb2+ ) concentrations in aqueous medium, and linear Stern-Volmer relationships were obtained, which indicated the existence of a main dynamic fluorescence quenching mechanism. BSA-PPy sensor showed a high sensitivity for detection of both metallic ions, Cu2+ and Pb2+ , with very low limit of detection values of 3.1 and 18.0 nM, respectively. The proposed quenching-fluorimetric sensor might be applied to the determination of traces of toxic heavy metallic ions in water samples.
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Affiliation(s)
- Momath Lo
- Faculté des Sciences, Université Cheikh Anta Diop, Dakar-Fann, Sénégal.,Laboratoire Géomatériaux et Environnement, Université Paris-Est, Marne-la-Vallée Cedex 2, France.,CNRS, ICMPE (UMR 7182), Université Paris Est, Thiais, France
| | - Abdou K D Diaw
- Faculté des Sciences, Université Cheikh Anta Diop, Dakar-Fann, Sénégal
| | | | - Mehmet A Oturan
- Laboratoire Géomatériaux et Environnement, Université Paris-Est, Marne-la-Vallée Cedex 2, France
| | | | - Jean-Jacques Aaron
- Laboratoire Géomatériaux et Environnement, Université Paris-Est, Marne-la-Vallée Cedex 2, France
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