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Dey U, Chattopadhyay A. The Potential of Gadolinium Ascorbate Nanoparticles as a Safer Contrast Agent. J Phys Chem B 2023; 127:346-358. [PMID: 36574624 DOI: 10.1021/acs.jpcb.2c05831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
There have been health concerns raised against the use of gadolinium (Gd)-based magnetic resonance imaging contrast agents. The primary observation is that Gd ions are prone to leaking into the bloodstream, causing nephrogenic systemic fibrosis as one of the side effects. In addition, such leakage of the ions inhibits easy clearance from the body. Herein we propose that Gd-ascorbate nanoparticles could be one of the safer choices as they are rather stable in aqueous dispersion and they do not get affected by Zn or Fe ions in the medium. The magnetic properties of the ions are preserved in the nanoparticles, and particles when sufficiently small may be amenable to renal clearance from the human body. Thus, when an aqueous solution of Gd-acetate and ascorbic acid was left to evolve with time, a Gd-ascorbate complex was formed that led to the formation of nanoparticles with time. The sizes of the nanoparticles increased with time, and when the particles were sufficiently large, they precipitated out of the medium. In addition, smaller nanoparticles were consistently present at all times of observations. UV-vis, photoluminescence and FTIR spectroscopy, mass spectrometry, and transmission electron microscopy analyses confirmed the formation of nanoparticles of Gd-ascorbate complex. In addition, magnetic measurements confirmed the high relaxivity of the nanoparticles as compared to the parent salt, indicating the effectiveness of the nanoparticles as contrast agents. Density functional theory-based calculations of the molecular complex-based nanoparticles accounted for the experimental observations.
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Affiliation(s)
- Ujjala Dey
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India
| | - Arun Chattopadhyay
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, India.,Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, India
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Use of hexacyanometalates as efficient linkers to assemble manganese(III)-salen moieties forming cyanide bridged polynuclear complexes: A review. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115977] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Basu D, Nayek HP. Bis(catecholato)germane: An Effective Catalyst for Friedel-Crafts Alkylation Reaction. Dalton Trans 2022; 51:10587-10594. [DOI: 10.1039/d2dt01721k] [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
Bis(catecholato)germane, [Ge(C6H4O2)2(H2O)2] (1) was synthesized by the reaction of catechol and germanium oxide in water according to a reported method. Complex 1 was characterized by FT-IR spectroscopy, NMR spectroscopy and...
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Tian M, Zheng J, Xue J, Pan X, Zhou D, Yao Q, Li Y, Duan W, Su J, Huang X. A series of microporous and robust Ln-MOFs showing luminescence properties and catalytic performances towards Knoevenagel reactions. Dalton Trans 2021; 50:17785-17791. [PMID: 34821237 DOI: 10.1039/d1dt03188k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of microporous Ln(III)-based metal-organic frameworks (1-Ln) have been hydrothermally synthesized using 4,4',4''-nitrilotribenzoic acid (H3NTB). Single crystal X-ray diffraction analyses show that 1-Ln are isostructural and have 3D porous frameworks with remarkable stability and permanent porosity for Ar and CO2 adsorption. In addition, 1-Ln exhibit diverse photoluminescence emissions depending on the nature of lanthanide ions. More importantly, 1-Ln are further studied in the Knoevenagel reactions of benzaldehyde derivatives and malononitrile under solvent-free conditions, and it is found that 1-Tb shows the best catalytic activities (yields up to 99%), providing a unique example to differentiate the roles of Ln ions within the frameworks in catalyzing Knoevenagel reactions.
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Affiliation(s)
- Miaomiao Tian
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, China.
| | - Jun Zheng
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, China.
| | - Jintang Xue
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, China.
| | - Xuze Pan
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, China.
| | - Dandan Zhou
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, China.
| | - Qingxia Yao
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, China.
| | - Yunwu Li
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, China.
| | - Wenzeng Duan
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, China.
| | - Jie Su
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, PR China.
| | - Xianqiang Huang
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory/Collaborative Innovation Center of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, China.
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Sarkar A, Jana S, Nayek HP. A pentanuclear Er (III) coordination cluster as a catalyst for selective synthesis of 1,2‐disubstituted benzimidazoles. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Arijit Sarkar
- Department of Chemistry Indian Institute of Technology (Indian School of Mines) Dhanbad Jharkhand 826004 India
| | - Sourav Jana
- Department of Chemistry Indian Institute of Technology (Indian School of Mines) Dhanbad Jharkhand 826004 India
| | - Hari Pada Nayek
- Department of Chemistry Indian Institute of Technology (Indian School of Mines) Dhanbad Jharkhand 826004 India
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Sarkar A, Mondal PP, Nayek HP. One‐Pot and Solvent‐Free Hantzsch Condensation Reaction Catalyzed by Mononuclear Dy(III) Complex. ChemistrySelect 2020. [DOI: 10.1002/slct.202002930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Arijit Sarkar
- Department of Chemistry Indian Institute of Technology (Indian School of Mines) Dhanbad Jharkhand 826004 India
| | - Pinku Prasad Mondal
- Department of Chemistry Indian Institute of Technology (Indian School of Mines) Dhanbad Jharkhand 826004 India
| | - Hari Pada Nayek
- Department of Chemistry Indian Institute of Technology (Indian School of Mines) Dhanbad Jharkhand 826004 India
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Dy(III) and Sm(III) Coordination Polymers Based on 2,4-Pyridinedicarboxylic Acid: Synthesis, Structures, Luminescence and Magnetism. J CLUST SCI 2019. [DOI: 10.1007/s10876-019-01706-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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