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Immanuel David C, Lee J, Ramanagul K, Gothandapani V, Kim BJ, Lee HI. Dual channel chemosensor for successive detection of environmentally toxic Pd 2+ and CN - ions and its application to cancer cell imaging. Anal Chim Acta 2024; 1305:342582. [PMID: 38677838 DOI: 10.1016/j.aca.2024.342582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 03/19/2024] [Accepted: 04/04/2024] [Indexed: 04/29/2024]
Abstract
BACKGROUND Detecting and neutralizing Pd2+ ions are a significant challenge due to their cytotoxicity, even at low concentrations. To address this issue, various chemosensors have been designed for advanced detection systems, offering simplicity and the potential to differentiate signals from different analytes. Nonetheless, these chemosensors often suffer from limited emission response and complex synthesis procedures. As a result, the tracking and quantification of residual palladium in biological systems and environments remain challenging tasks, with only a few chemosensing probes available for commercial use. RESULTS In this paper, a straightforward approach for the selective detection of Pd2+ ions is proposed, which involves the design, synthesis, and utilization of a propargylated naphthalene-derived probe (E)-N'-((2-(prop-2-yn-1-yloxy)naphthalen-1-yl)methylene)benzohydrazide (NHP). The NHP probe exhibits sensitive dual-channel colorimetry and fluorescence Pd2+ detection over other tested metal ions. The detection process is performed through a catalytic depropargylation reaction, followed by an excited state intramolecular proton transfer (ESIPT) process, the detection limit is as low as 11.58 × 10-7 M under mild conditions. Interestingly, the resultant chemodosimeter adduct (E)-N'-((2-hydroxynaphthalen-1-yl)methylene)benzohydrazide (NHH) was employed for the consecutive detection of CN- ions, exhibiting an impressive detection limit of 31.79 × 10-8 M. Validation of both detection processes was achieved through 1H nuclear magnetic resonance and density functional theory calculations. For real-time applications of the NHP and NHH probes, smartphone-assisted detection, and intracellular detection of Pd2+ and CN- ions within HeLa cells were studied. SIGNIFICANCE This research presents a novel naphthalene derivative for visually detecting environmentally toxic Pd2+ and CN- ions. The synthesized probe selectively binds to Pd2+, forming a chemodosimeter. It successfully detects CN- ions through colorimetry and fluorimetry, offering a low detection limit and quick response. Notably, it's the first naphthalene-based small molecule to serve as a dual probe for toxic analytes - palladium and cyanide. Moreover, it effectively detects Pd2+ and CN- intracellularly in cancer cells.
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Affiliation(s)
- Charles Immanuel David
- Department of Chemistry, Chemical Industry Research Institution (CIRI), University of Ulsan, Ulsan, 44776, Republic of Korea
| | - Jihyun Lee
- Department of Chemistry, Chemical Industry Research Institution (CIRI), University of Ulsan, Ulsan, 44776, Republic of Korea
| | - Karthick Ramanagul
- Department of Physics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai, Tamil Nadu, 602105, India
| | - Velraj Gothandapani
- Department of Physics, CEG Campus, Anna University, Chennai, Tamil Nadu, 600025, India
| | - Beom Jin Kim
- Department of Chemistry, Chemical Industry Research Institution (CIRI), University of Ulsan, Ulsan, 44776, Republic of Korea.
| | - Hyung-Il Lee
- Department of Chemistry, Chemical Industry Research Institution (CIRI), University of Ulsan, Ulsan, 44776, Republic of Korea.
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Chen XF, Song Y, Liu Y, Zhou Y, Zhao X, Yang Z. A near-infrared emitting "off-on" fluorescent probe for bioimaging of Pd(Ⅱ) ions in living cells and mice. Anal Chim Acta 2024; 1289:342174. [PMID: 38245197 DOI: 10.1016/j.aca.2023.342174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 12/12/2023] [Accepted: 12/20/2023] [Indexed: 01/22/2024]
Abstract
BACKGROUND The surging consumption of palladium in modern industry has given rise to its accumulation in the ecosystem, posing conspicuous toxicity to aquatic organisms and human health. The investigation of palladium in biological systems is highly demanded for the in-depth understanding of its dynamics and behaviors. Fluorescence imaging serves as a powerful approach to assess palladium species in biological systems, and currently most of the sensing probes are applicable to living cells. Effective tracking of palladium species in living organisms is challenging, which requires sufficient hydrophilicity and imaging depth of the probes. RESULTS Based on an intramolecular charge transfer (ICT) mechanism, a distyryl boron dipyrromethene (BODIPY) derivative (DISBDP-Pd) has been prepared for the near-infrared (NIR) fluorescence imaging of Pd2+ ions. Two additional methoxy triethylene glycol (TEG) chains could serve as flexible and hydrophilic moieties to enhance the aqueous solubility and cell permeability of the extended conjugate. Solution studies revealed that DISBDP-Pd exhibited a NIR fluorescence enhancement signal exclusively to Pd2+ ions (detection limit as low as 0.85 ppb) with negligible interference from Pd0 species and other closely related metal ions. Computational calculations have been performed to rationalize the binding mode and the mechanism of action. Fluorescence imaging assays have been conducted on A549 human non-small cell lung carcinoma cells and mouse models. Exhibiting negligible cytotoxicity, DISBDP-Pd demonstrated concentration-related fluorescence enhancement signals in response to Pd2+ ions in living cells and mice. SIGNIFICANCE DISBDP-Pd exhibits advantages over many small molecule palladium probes in terms of satisfactory aqueous solubility, high sensitivity and selectivity, and biocompatible NIR emission property, which are particularly favorable for the sensing application in biological environments. The design strategy of this probe can potentially be adopted for the functionalization of other BODIPY probes implemented for NIR fluorescence bioimaging.
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Affiliation(s)
- Xiao-Fei Chen
- Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology, Institute of Analysis, Guangdong Academy of Sciences (China National Analytical Center, Guangzhou), Guangzhou, 510070, People's Republic of China
| | - Yu Song
- Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology, Institute of Analysis, Guangdong Academy of Sciences (China National Analytical Center, Guangzhou), Guangzhou, 510070, People's Republic of China
| | - Yiling Liu
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Discovery of Chinese Ministry of Education (MOE), School of Pharmacy, Jinan University, Guangzhou, 510632, People's Republic of China
| | - Yang Zhou
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Discovery of Chinese Ministry of Education (MOE), School of Pharmacy, Jinan University, Guangzhou, 510632, People's Republic of China.
| | - Xin Zhao
- Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology, Institute of Analysis, Guangdong Academy of Sciences (China National Analytical Center, Guangzhou), Guangzhou, 510070, People's Republic of China.
| | - Zifeng Yang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, People's Republic of China; Guangzhou Laboratory, Guangzhou, 510320, People's Republic of China; Guangzhou Key Laboratory for Clinical Rapid Diagnosis and Early Warning of Infectious Diseases, Guangzhou, 510005, People's Republic of China.
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Chopra T, Parkesh R. Microwave-Assisted Synthesis of Functionalized Carbon Nanospheres Using Banana Peels: pH-Dependent Synthesis, Characterization, and Selective Sensing Applications. ACS OMEGA 2024; 9:4555-4571. [PMID: 38313540 PMCID: PMC10831994 DOI: 10.1021/acsomega.3c07544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 12/15/2023] [Accepted: 12/22/2023] [Indexed: 02/06/2024]
Abstract
This work presents a microwave-based green synthesis method for producing carbon nanospheres (CNSs) and investigates the impact of presynthesis pH on their size and assembly. The resulting CNSs are monodispersed, averaging 35 nm in size, and exhibit notable characteristics including high water solubility, photostability, and a narrow size distribution, achieved within a synthesis time of 15 min. The synthesized CNS features functional groups such as -OH, -COOH, -NH, -C-O-C, =C-H, and -CH. This diversity empowers the CNS for various applications including sensing. The CNS exhibits a distinct UV peak at 282 nm and emits intense fluorescence at 430 nm upon excitation at 350 nm. These functionalized CNSs enable selective and specific sensing of Cu2+ ions and the amino acid tryptophan (Trp) in aqueous solutions. In the presence of Cu2+ ions, static-based quenching of CNS fluorescence was observed due to the chelation-enhanced quenching (CHEQ) effect. Notably, Cu2+ ions induce a substantial change in UV spectra alongside a red-shift in the peak position. The limits of detection and quantification for Cu2+ ions with CNS are determined as 0.73 and 2.45 μg/mL, respectively. Additionally, on interaction with tryptophan, the UV spectra of CNS display a marked increase in the peak at 282 nm, accompanied by a red-shift phenomenon. The limits of detection and quantification for l-tryptophan are 4.510 × 10-3 and 1.50 × 10-2 μg/mL, respectively, indicating its significant potential for biological applications. Furthermore, the practical applicability of CNSs is demonstrated by their successful implementation in analyzing real water samples and filter paper-based examination, showcasing their effectiveness for on-site sensing.
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Affiliation(s)
- Tavishi Chopra
- CSIR-Institute
of Microbial Technology, Chandigarh 160036, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, Uttar Pradesh, India
| | - Raman Parkesh
- CSIR-Institute
of Microbial Technology, Chandigarh 160036, India
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Singh J, Saini S, Chauhan RK, Bhardwaj P, Kumar A, Virender. An Isoniazid Based Schiff Base Sensor for Selective Detection of Pd 2+ Ions. J Fluoresc 2023:10.1007/s10895-023-03491-x. [PMID: 37971608 DOI: 10.1007/s10895-023-03491-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 10/31/2023] [Indexed: 11/19/2023]
Abstract
Here, we developed a novel isoniazid based fluorescent probe (E)-N'-(thiophen-2-ylmethylene)isonicotinohydrazide (TINH) through simple condensation reaction and employed for selective detection of Pd2+ ions with a low detection limit of 4.102 × 10-11 M. Among the many existing cations, TINH bound Pd2+ ions with an association affinity of 9.794 × 105 M-1. Adding Pd2+ ions to ligand solution increased the absorption intensity in UV-Visible and quenched the emission intensity in fluorescence spectroscopic experiments. More importantly, this TINH complexed to Pd2+ ions in 1:1 stoichiometric ratio. To evaluate the stability of complexed system, pH experiments has been performed. The binding insights among the ligand and Pd2+ ions has been confirmed by IR spectroscopic and MASS spectrometric methods. Additionally, TINH also applied to real water samples for the identification and measurement of Pd2+ ions. Hence, this system could be highly applicable for detection of Pd2+ ions in environmental and industrial samples with in low detection range.
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Affiliation(s)
- Jasbir Singh
- Department of Chemistry, Baba Mastnath University, Rohtak, 124021, India
| | - Shubham Saini
- Bharat Institute of Pharmacy Degree Course, Pehladpur, Babain-Kurukshetra, 136132, India
| | - Ravish K Chauhan
- Department of Chemistry, Indira Gandhi National College, Ladwa, Kurukshetra, 136132, India.
| | - Pallavi Bhardwaj
- Department of Chemistry, Baba Mastnath University, Rohtak, 124021, India.
| | - Ashwani Kumar
- Department of Chemistry, Kurukshetra University Kurukshetra, Kurukshetra, 136119, India
| | - Virender
- Department of Chemistry, Deenbandhu Chhotu Ram University of Science & Technology, Murthal, Sonepat, 131039, Haryana, India
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5
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Moon S, Kim C. A Fluorescent and Colorimetric Chemosensor Detecting Pd 2+ Based on Chalcone Structure with Triphenylamine. J Fluoresc 2023; 33:1739-1748. [PMID: 36826725 DOI: 10.1007/s10895-023-03176-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 02/11/2023] [Indexed: 02/25/2023]
Abstract
A fluorometric and colorimetric chemosensor DiPP ((E)-3-(4-(diphenylamino)phenyl)-1-(pyridin-2-yl)prop-2-en-1-one) based on chalcone structure with a triphenylamine group was synthesized. Sensor DiPP detected Pd2+ with fluorescence turn-off and via colorimetry variation of yellow to purple. The binding ratio of DiPP to Pd2+ turned out to be 1 : 1. Detection limits for Pd2+ by DiPP were analyzed to be 0.67 µM and 0.80 µM through the fluorescent and colorimetric methods. Additionally, the fluorescent and colorimetric test strips were applied for probing Pd2+ and displayed that DiPP could obviously discriminate Pd2+ from other metals. The binding feature of DiPP to Pd2+ was presented by ESI-mass, Job plot, NMR titration, ESI-mass, and DFT calculations.
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Affiliation(s)
- Sungjin Moon
- Dept of New and Renewable Energy Convergence and Fine Chem, Seoul National Univ. of Sci. and Tech. (SNUT), 01811, Seoul, Korea
| | - Cheal Kim
- Dept of New and Renewable Energy Convergence and Fine Chem, Seoul National Univ. of Sci. and Tech. (SNUT), 01811, Seoul, Korea.
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Zhang H, Wang J, Wei S, Wang C, Yin X, Song X, Jiang C, Sun G. Nitrogen-doped graphene quantum dot-based portable fluorescent sensors for the sensitive detection of Fe 3+ and ATP with logic gate operation. J Mater Chem B 2023. [PMID: 37334649 DOI: 10.1039/d3tb00327b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Adenosine triphosphate (ATP) and Fe3+ are important "signaling molecules" in living organisms, and their abnormal concentrations can be used for the early diagnosis of degenerative diseases. Therefore, the development of a sensitive and accurate fluorescent sensor is essential for detecting these signaling molecules in biological matrices. Herein, nitrogen-doped graphene quantum dots (N-GQDs) with cyan fluorescence emission were prepared by thermal cleavage of graphene oxide (GO) with N,N-dimethylformamide (DMF) as a solvent. The synergistic effect of static quenching and internal filtration enabled the selective quenching of N-GQD fluorescence by Fe3+. With the introduction of ATP, Fe3+ in the N-GQDs-Fe3+ system formed a more stable complex with ATP via the Fe-O-P bond, thus restoring the fluorescence of the N-GQDs. Fe3+ and ATP were detected in the linear ranges of 0-34 μM and 0-10 μM with the limits of detection (LOD) of 2.38 nM and 1.16 nM, respectively. In addition to monitoring Fe3+ and ATP in mouse serum and urine, the proposed method was also successfully applied for cytoplasmic imaging of 4T1 cells and in vivo imaging of freshwater shrimps. Moreover, the fluorescence and solution color change-based "AND" logic gate was successfully demonstrated in the biological matrix. Importantly, a complete sensing system was constructed by combining the N-GQDs with hydrogel kits and fluorescent flexible films. Thus, the prepared N-GQDs can be expected to serve as a valuable analytical tool for monitoring Fe3+ and ATP concentrations in biological matrices.
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Affiliation(s)
- Hongyuan Zhang
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China.
- Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China
| | - Jieqiong Wang
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China.
- Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China
| | - Shanshan Wei
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China.
- Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China
| | - Chenzhao Wang
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China.
- Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China
| | - Xiangyu Yin
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China.
- Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China
| | - Xuewei Song
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China.
- Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China
| | - Chunzhu Jiang
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China.
| | - Guoying Sun
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China.
- Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, Changchun 130012, P. R. China
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Hua Y, Ahmadi Y, Kim KH. Novel strategies for the formulation and processing of aluminum metal-organic framework-based sensing systems toward environmental monitoring of metal ions. JOURNAL OF HAZARDOUS MATERIALS 2023; 444:130422. [PMID: 36434918 DOI: 10.1016/j.jhazmat.2022.130422] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 11/11/2022] [Accepted: 11/15/2022] [Indexed: 06/16/2023]
Abstract
Aluminum is a relatively inexpensive and abundant metal for the mass production of metal-organic frameworks (MOFs). Aluminum-based MOFs (Al-MOFs) have drawn a good deal of research interest due to their unique properties for diverse applications (e.g., excellent chemical and structural stability). This review has been organized to highlight the current progress achieved in the synthesis/functionalization of Al-MOF materials with the special emphasis on their sensing application, especially toward metal ion pollutants in the liquid phase. To learn more about the utility of Al-MOF-based sensing systems, their performances have been evaluated for diverse metallic components in reference to many other types of sensing systems (in terms of the key quality assurance (QA) criteria such as limit of detection (LOD)). Finally, the challenges and outlook for Al-MOF-based sensing systems are discussed to help expand their real-world applications.
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Affiliation(s)
- Yongbiao Hua
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, South Korea
| | - Younes Ahmadi
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, South Korea
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, South Korea.
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Mahata S, Dey S, Mandal BB, Manivannan V. 3-(2-Hydroxyphenyl)imidazo[5, 1-a]isoquinoline as Cu(II) sensor, its Cu(II) complex for selective detection of CN− ion and biological compatibility. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113795] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Mahata S, Kumar S, Dey S, Mandal BB, Manivannan V. A probe with hydrazinecarbothioamide and 1,8-naphthalimide groups for “turn-on” fluorescence detection of Hg2+ and Ag+ ions and live-cell imaging studies. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.120876] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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10
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Mondal TK, Naskar R, Gharami S, Mandal S. A new chromone based fluorescence probe for ratiometric detection of Pd2+. NEW J CHEM 2022. [DOI: 10.1039/d2nj02310e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new chromone based fluorescent probe (HMPM) is introduced for selective detection of Pd2+. The designed probe exhibits a ratiometric fluorescence enhancement which can be attributed to the ESIPT and/or...
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Mahata S, Janani G, Mandal BB, Manivannan V. A coumarin based visual and fluorometric probe for selective detection of Al(III), Cr(III) and Fe(III) ions through “turn-on” response and its biological application. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113340] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Basak M, Halder S, Das G. Folic acid induced disassembly of self-assembled fluorene-naphthalene based receptor and contemporaneous detection of folic acid in aqueous medium. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113292] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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13
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Palladium induced activation of a substituted naphthopyran for smartphone assisted sensitive and selective sensing in aqueous solution. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129282] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Shally, Kumar V, Althagafi I, Kumar A, Singhal D, Kumar A, Gupta R, Pratap R. Design and synthesis of new functionalized 8-(thiophen-2-yl)-1,2,3,4-tetrahydroquinolines as turn-off chemosensors for selective recognition of Pd 2+ ions. NEW J CHEM 2020. [DOI: 10.1039/d0nj02272a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Functionalized 8-thienyl-1,2,3,4-tetrahydroquinoline was synthesized as a fluorescent turn-off chemosensor for selective recognition of Pd2+ ions with a low detection limit.
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Affiliation(s)
- Shally
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Vijay Kumar
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | | | - Ashish Kumar
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Divya Singhal
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
| | - Abhinav Kumar
- Department of Chemistry
- University of Lucknow
- Lucknow
- India
| | - Rajeev Gupta
- Department of Chemistry
- University of Delhi
- Delhi-110007
- India
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