1
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Gerasimov MA, Pozdeev AS, Evsiunina MV, Kalle P, Yarenkov NR, Borisova NE, Matveev PI. Ionic Liquid as a N,O-Donor Ligand-Based Extraction System Modifier: Establishing the Mechanism of Am(III)-Selectivity Increasing. Inorg Chem 2024; 63:2109-2121. [PMID: 38237044 DOI: 10.1021/acs.inorgchem.3c03944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
In this work, we studied the extraction systems for the separation f-elements based on the tetradentate N,O-donor ligand di(N-ethyl-4-ethylanilide) 2,2'-dipyridyl-6,6'-dicarboxylic acid (L). The organic phase of these systems was perspective fluorine-containing organic solvents-metanitrobenzotrifluoride (F-3), ionic liquid C4mimNTf2 (IL), and their mixture. The increase of Am(III) selectivity in the presence of Ln(III) in cases of the diluent mixture was shown. The mechanism of the f-element complexation leading to the improved properties of the extraction systems was studied by UV-visible, Raman-spectroscopy, XRD-study, and density functional theory calculations.
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Affiliation(s)
- M A Gerasimov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - A S Pozdeev
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, United States
| | - M V Evsiunina
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - P Kalle
- N.S. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Moscow 119991, Russia
| | - N R Yarenkov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - N E Borisova
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - P I Matveev
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
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2
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Manna K, Sutter JP, Natarajan S. Turn-off luminescence sensing, white light emission and magnetic studies of two-dimensional lanthanide MOFs. Dalton Trans 2023. [PMID: 38013491 DOI: 10.1039/d3dt01882b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
The lanthanide metal organic framework compounds [Ln(BPTA)1.5(Bpy)]·0.5DMF (Ln = Y, Eu, Gd, Tb, Dy; 1a-5a) and [Ln(BPTA)1.5(Phen)]·0.5DMF (Ln = Y, Eu, Gd, Tb, Dy; 1b-5b) were prepared by employing 2,5-bis(prop-2-yn-1-yloxy)terephthalic acid (2,5-BPTA) as the primary ligand and 2,2'-bipyridine (1a-5a) and 1,10-phenanthroline (1b-5b) as the secondary ligands. Single-crystal structural studies on [Gd(BPTA)1.5(Bpy)]·0.5DMF (3a) and [Dy(BPTA)1.5(Phen)]·0.5DMF (5b) indicated that the compounds have a two-dimensional structure. The Y compound exhibits blue emission, and the other compounds exhibit emission in the expected regions (λex = 350 nm). White light emission was achieved by careful mixing of the red (Eu3+) and green (Tb3+) components in the blue emitting Y compound. Thus, Y0.96Tb0.02Eu0.02 (bpy) and Y0.939Tb0.06Eu0.001 (phen) were found to show white emission when excited using a wavelength of 350 nm. The introduction of N-N-containing ancillary ligands (i.e., bpy and phen) increased the overall quantum yield (QY) of white light emission to 31% and 43%, respectively. The high QY observed for the Tb and Eu compounds was found to be sensitive and selective for the fluorometric detection of azinphos-methyl pesticide and trinitrophenol (TNP) in an aqueous medium at the ppb level. The same behaviour was observed when utilising the compounds as onsite paper strip sensors. Their magnetic properties were also studied, revealing for the Tb and Dy derivatives slow relaxation of the magnetisation at low temperature. The present study highlights the usefulness of rigid π-conjugated molecules such as 2,2'-bipyridine and 1,10-phenanthroline in enhancing the many utilities of rare-earth-containing MOFs towards white light emission, the sensing of harmful and dangerous substances and magnetic properties.
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Affiliation(s)
- Krishna Manna
- Framework Solids Laboratory, Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore- 560012, India.
| | - Jean-Pascal Sutter
- Laboratoire de Chime de Coordination du CNRS, Université de Toulouse, CNRS, 205 route de Narbonne, 31077 Toulouse, France.
| | - Srinivasan Natarajan
- Framework Solids Laboratory, Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore- 560012, India.
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3
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Duan WL, Ma C, Luan J, Ding F, Yan F, Zhang L, Li WZ. Fabrication of metal-organic salts with heterogeneous conformations of a ligand as dual-functional urease and nitrification inhibitors. Dalton Trans 2023; 52:14329-14337. [PMID: 37540017 DOI: 10.1039/d3dt01375h] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
Urease inhibitors (UIs) and nitrification inhibitors (NIs) can greatly reduce nitrogen loss in agriculture soil. However, design and synthesis of an efficient and environmentally friendly dual-functional inhibitor is still a great challenge. Herein, four metal-organic salts (MOSs) based on heterogeneous conformations of the ligand N1,N1,N2,N2-tetrakis(2-fluorobenzyl)ethane-1,2-diamine (L), namely, [2HL]2+·[MCl4]2- (M = Cu, Zn, Cd, and Co), have been synthesized by the "second sphere" coordination method and structurally characterized in detail. Single crystal X-ray diffraction (SCXRD) analyses reveal that the four MOSs are 0D supramolecular structures containing [2HL]2+ and [MCl4]2-, which are connected through non-covalent bonds. Furthermore, the urease and nitrification inhibitory activities of MOSs are evaluated, showing excellent nitrification inhibitory activity with the nitrification inhibitory rate as high as 70.57% on the 28th day in soil cultivation experiment. In particular, MOS 1 shows significant urease inhibitory activity with half maximal inhibitory concentration (IC50) values of 0.89 ± 0.01 μM (0.5 h) and 1.87 ± 0.01 μM (3 h), which can serve as a dual-functional inhibitor.
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Affiliation(s)
- Wen-Long Duan
- College of Science, Shenyang University of Chemical Technology, Shenyang, 110142, P. R. China.
| | - Cong Ma
- College of Science, Shenyang University of Chemical Technology, Shenyang, 110142, P. R. China.
| | - Jian Luan
- College of Sciences, Northeastern University, Shenyang, 110819, P. R. China.
| | - Fang Ding
- College of Tourism and Resources Environment, Zaozhuang University, Zaozhuang, 277160, P. R. China
| | - Feng Yan
- College of Science, Shenyang University of Chemical Technology, Shenyang, 110142, P. R. China.
| | - Lei Zhang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, P. R. China.
| | - Wen-Ze Li
- College of Science, Shenyang University of Chemical Technology, Shenyang, 110142, P. R. China.
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4
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Borisova NE, Fedoseev AM, Kostikova GV, Matveev PI, Starostin LY, Sokolova MN, Evsiunina MV. Solvent Extraction and Conformation Rigidity: Actinide(IV) and Actinide(VI) Come Together. Inorg Chem 2022; 61:20774-20784. [PMID: 36516029 DOI: 10.1021/acs.inorgchem.2c02578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The first comprehensive structural and extraction study of a 2,2'-bipyridine-6,6'-dicarboxamide (L diamide) extractant for U, Np, Pu, Th, Am, and Eu ions showed great potential for actinide separation due to steric hindrance of the amidic side phenyl ring of the given compound. The study of the complexes of An(VI) and Th(IV) with 2,2'-bipyridyldicarboxamide-type extractants demonstrated the structure of the extraction species for the first time. Investigation of the extraction properties with the radiometric and millimolar quantities of actinides showed similar extraction trends. For the first time, a metal-ion-induced phenyl-ring rotation restriction was found for the U, Th, and Eu complexes by employing temperature-dependent dynamic NMR. A study of the solution behavior of the complexes accompanied by density functional theory modeling studies elucidated the mechanism of the unusual C-N bond rotation restriction induced by metal coordination.
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Affiliation(s)
- Nataliya E Borisova
- Department of ChemistryM. V. Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow119991, Russia
| | - Alexandre M Fedoseev
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31 Leninsky Prospect, Building 4, Moscow119071, Russia
| | - Galina V Kostikova
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31 Leninsky Prospect, Building 4, Moscow119071, Russia
| | - Petr I Matveev
- Department of ChemistryM. V. Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow119991, Russia
| | - Leonid Yu Starostin
- Department of ChemistryM. V. Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow119991, Russia
| | - Marina N Sokolova
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31 Leninsky Prospect, Building 4, Moscow119071, Russia
| | - Mariia V Evsiunina
- Department of ChemistryM. V. Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow119991, Russia
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5
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Ustynyuk YA, Zhokhova NI, Gloriozov IP, Matveev PI, Evsiunina MV, Lemport PS, Pozdeev AS, Petrov VG, Yatsenko AV, Tafeenko VA, Nenajdenko VG. Competing Routes in the Extraction of Lanthanide Nitrates by 1,10-Phenanthroline-2,9-diamides: An Impact of Structure of Complexes on the Extraction. Int J Mol Sci 2022; 23:ijms232415538. [PMID: 36555179 PMCID: PMC9779341 DOI: 10.3390/ijms232415538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 12/05/2022] [Accepted: 12/05/2022] [Indexed: 12/13/2022] Open
Abstract
The fact of the fracture of the extraction curve of lanthanides by 1,10-phenanthroline-2,9-diamides is explained in terms of the structure of complexes, solvent extraction data and quantum chemical calculations. The solvent extraction proceeds in two competing directions: in the form of neutral complexes LLn(NO3)3 and in the form of tight ion pairs {[LLn(NO3)2 H2O]+ (NO3-).
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6
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Yang CJ, Li XM. Supramolecular Mn(III) Coordination Polymer with Treatment Activity on Diabetic Retinopathy. J BIOMATER TISS ENG 2022. [DOI: 10.1166/jbt.2022.3140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A new Mn(III) coordination polymer formulated as [Mn2(L)2Cl2(DMF)2]n (1, H2L is 2,2′-bipyridyl-6,6′-dicarboxylic acid; DMF is N,N′-dimethylformamide) was solvothermally prepared using Mn(ClO4)2
· 6H2O, H2L, and (CH3)4NCl as raw materials. The assay of SCXRD for 1 suggests that it features a 0D isolated dinuclear [Mn2(L)2Cl2(DMF)2] structure that exists in P-1 with triclinic
system, and the cell parameters are a = 8.4593(2), b = 9.4675(5), c = 11.0147(6) Å, α = 86.023(3), β = 74.892(6), γ = 78.055(4)°, V = 833.11(7) Å3, and Z = 1. These isolated 0D dinuclear [Mn2(L)2Cl2(DMF)2]
motifs were extended into a 1D supramolecular chain via the connection of intermolecular C–H…Cl together with the C–H…O H bond. Furthermore, the novel CP’s treatment activity against the diabetic retinopathy was investigated, and the associated mechanism of
the new compound was discussed.
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Affiliation(s)
- Chun-Juan Yang
- Endocrinology Department, Shaanxi Kangfu Hospital, Xi’an, 710065, Shaanxi, China
| | - Xing-Mei Li
- Endocrinology Department, Yulin No. 2 Hospital, Yulin, 719000, Shaanxi, China
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7
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Yang X, Wang S, Xu L, Yan Q, Xu C, Matveev P, Lei L, Xiao C. New tetradentate N, O-hybrid phenanthroline-derived organophosphorus extractants for the separation and complexation of trivalent actinides and lanthanides. Inorg Chem Front 2022. [DOI: 10.1039/d2qi01153k] [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
Comparison of the extraction and separation properties between two novel phenanthroline-derived organophosphorus ligands, Et-Ph-BPPhen and Et-Ph-PIPhen.
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Affiliation(s)
- Xiao Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Shihui Wang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lei Xu
- Institute of Nuclear-Agricultural Science, Zhejiang University, Hangzhou 310058, China
| | - Qiang Yan
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Chao Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
| | - Petr Matveev
- Radiochemistry Division, Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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8
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Matveev PI, Huang PW, Kirsanova AA, Ananyev IV, Sumyanova TB, Kharcheva AV, Khvorostinin EY, Petrov VG, Shi WQ, Kalmykov SN, Borisova NE. Way to Enforce Selectivity via Steric Hindrance: Improvement of Am(III)/Eu(III) Solvent Extraction by Loaded Diphosphonic Acid Esters. Inorg Chem 2021; 60:14563-14581. [PMID: 34546034 DOI: 10.1021/acs.inorgchem.1c01432] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hybrid donor extractants are a promising class of compounds for the separation of trivalent actinides and lanthanides. Here, we investigated a series of sterically loaded diphosphonate ligands based on bipyridine (BiPy-PO-iPr and BiPy-PO-cHex) and phenanthroline (Phen-PO-iPr and Phen-PO-cHex). We studied their complex formation with nitrates of trivalent f-elements in solvent extraction systems (Am and Eu) and homogeneous acetonitrile solutions (Nd, Eu, and Lu). Phenanthroline extractants demonstrated the highest efficiency and selectivity [SF(Am/Eu) up to 14] toward Am(III) extraction from nitric acid solutions among all of the studied diphosphonates of N-heterocycles. The binding constants established by UV-vis titration also indicated stronger binding of sterically impaired diphosphonates compared to the primary substituted diphosphonates. NMR titration and slope analysis during solvent extraction showed the formation of 2:1 complexes at high concentrations (>10-3 mol/L) for phenanthroline-based ligands. According to UV-vis titrations at low concentrations (10-5-10-6 mol/L), the phenanthroline-based ligands formed 1:1 complexes. Bipyridine-based ligands formed 1:1 complexes regardless of the ligand concentration. Luminescence titrations revealed that the quantum yields of the complexes with Eu(III) were 81 ± 8% (BiPy-PO-iPr) and 93 ± 9% (Phen-PO-iPr). Single crystals of the structures [Lu(μ2,κ4-(iPrO)2P(O)Phen(O)2(OiPr))(NO3)2]2 and Eu(Phen-PO-iPr)(NO3)3 were obtained by chemical synthesis with the Phen-PO-iPr ligand. X-ray diffraction studies revealed a closer contact of the f-element with the aromatic N atoms in the case of sterically loaded P═O ligands compared with sterically deficient ligands. Density functional theory calculations allowed us to rationalize the observed selectivity trends in terms of the bond length, Mayer bond order, and preorganization energy.
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Affiliation(s)
- Petr I Matveev
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Pin-Wen Huang
- Laboratory of Nuclear Energy Chemistry, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.,Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
| | - Anna A Kirsanova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Ivan V Ananyev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Avilova St. 28, Moscow 119991, Russian Federation
| | - Tsagana B Sumyanova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Anastasia V Kharcheva
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation.,Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory 1/2, Moscow 119991, Russian Federation
| | - Evgenii Yu Khvorostinin
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Vladimir G Petrov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Wei-Qun Shi
- Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
| | - Stepan N Kalmykov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation
| | - Nataliya E Borisova
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1, Building 3, Moscow 119991, Russian Federation.,A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Avilova St. 28, Moscow 119991, Russian Federation
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9
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An(III)/Ln(III) solvent extraction: Theoretical and experimental investigation of the role of ligand conformational mobility. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115098] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Webster AM, Peacock AFA. De novo designed coiled coils as scaffolds for lanthanides, including novel imaging agents with a twist. Chem Commun (Camb) 2021; 57:6851-6862. [DOI: 10.1039/d1cc02013g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The design of artificial miniature lanthanide proteins, provide an opportunity to access new functional metalloproteins as well as insight into native lanthanide biochemistry.
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11
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Sumyanova T, Borisova N, Ivanov A, Usacheva T, Kabirov D, Batov D. Complexation Reactions between N,N '-Diethyl-N,N '-Difluorophenyl-2,2'-Bipyridyl-6,6-Dicarboxamides with Europium in Ethanol: Spectrophotometric and Isothermal Titration Calorimetry Studies. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2020. [DOI: 10.1134/s0036024420130269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Yang X, Xu L, Hao Y, Meng R, Zhang X, Lei L, Xiao C. Effect of Counteranions on the Extraction and Complexation of Trivalent Lanthanides with Tetradentate Phenanthroline-Derived Phosphonate Ligands. Inorg Chem 2020; 59:17453-17463. [DOI: 10.1021/acs.inorgchem.0c02728] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xiao Yang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lei Xu
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yuxun Hao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Ruixue Meng
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xingwang Zhang
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lecheng Lei
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Chengliang Xiao
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
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13
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Kot K, Oczko G, Puchalska M, Starynowicz P. Relationships between structural and spectroscopic properties of complexes of o-phenanthroline and 2,2′-bipyridine with lanthanide (Ln = Sm, Eu) thiocyanates. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Song H, Fan C, Wang R, Wang Z, Pu S. 1,10-Phenanthroline decorated with substituent groups forming europium(III) complexes: synthesis, crystal structure, photoluminescence properties and their bioimaging in living cells. J COORD CHEM 2020. [DOI: 10.1080/00958972.2020.1824065] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Huimin Song
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, 330013, PR China
| | - Congbin Fan
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, 330013, PR China
| | - Renjie Wang
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, 330013, PR China
| | - Zheng Wang
- Lehn Institute of Functional materials, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China
| | - Shouzhi Pu
- Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, 330013, PR China
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15
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Slope LN, Hill MG, Smith CF, Teare P, de Cogan FJ, Britton MM, Peacock AFA. Tuning coordination chemistry through the second sphere in designed metallocoiled coils. Chem Commun (Camb) 2020; 56:3729-3732. [PMID: 32129331 DOI: 10.1039/c9cc08189e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The metal hydration state within a designed coiled coil can be progressively tuned across the full integer range (3 → 0 aqua ligands), by careful choice of a second sphere terminal residue, including the lesser used Trp. Potential implications include a four-fold change in MRI relaxivity when applied to lanthanide coiled coils.
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Affiliation(s)
- Louise N Slope
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, UK.
| | - Michael G Hill
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, UK.
| | - Catherine F Smith
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, UK.
| | - Paul Teare
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, UK.
| | - Felicity J de Cogan
- Institute of Microbiology and Infection, University of Birmingham, B15 2TT, UK
| | - Melanie M Britton
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, UK.
| | - Anna F A Peacock
- School of Chemistry, University of Birmingham, Edgbaston, B15 2TT, UK.
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16
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Non-covalent intramolecular interactions through ligand-design promoting efficient photoluminescence from transition metal complexes. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213094] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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17
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de Bettencourt-Dias A, Beeler RM, Zimmerman JR. Secondary-Sphere Chlorolanthanide(III) Complexes with a 1,3,5-Triazine-Based Ligand Supported by Anion-π, π-π, and Hydrogen-Bonding Interactions. Inorg Chem 2020; 59:151-160. [PMID: 31509390 DOI: 10.1021/acs.inorgchem.9b01804] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
2,4,6-Dipicolylamine-functionalized 1,3,5-triazine (dpat) was isolated. When reacted with LaCl3, compound [(LaCl6)(H3dpat)][H2O]2 (1) formed, which crystallized in the monoclinic P21/n space group with parameters a = 11.47 Å, b = 19.22 Å, c = 20.98 Å, V = 4652.02 Å, and β = 90.53°. When reacted with NdCl3, the complex [NdCl3(H2O)4(H3dpat)][Cl]3(MeOH)2 (2) crystallized in the monoclinic P21/n space group with unit cell parameters a = 20.05 Å, b = 12.81 Å, c = 20.64 Å, V = 5004.40 Å, and β = 110.20°. In both cases, the dpat ligand forms a bowl-shaped cavity that partially envelops the LnIII-containing central unit, which is anionic in 1 and neutral in 2. The formation of these outer-sphere complexes is supported by secondary interactions, including π-π stacking, hydrogen bonding, and anion-π between the chlorolanthanide(III) fragment and the electron-deficient 1,3,5-triazine ring. Evidence of protonation of the pyridine rings in dpat was substantiated through the isolation of [H2dpat][Cl]2 (3). This compound crystallized in the monoclinic C2/c space group with parameters a = 11.93 Å, b = 20.22 Å, c = 15.28 Å, V = 3664.97 Å, and β = 94.35°. Four pyridine rings are pairwise protonated in 3. dpat showed a moderate ability to extract LaIII from an aqueous to an organic phase, indicating its potential, through judicious manipulation of secondary-sphere interactions, as the starting point for efficient extractants for LnIII ions.
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Affiliation(s)
| | - Rose M Beeler
- Department of Chemistry , University of Nevada , Reno , Nevada 89557-0216 , United States
| | - Joshua R Zimmerman
- Department of Chemistry , University of Nevada , Reno , Nevada 89557-0216 , United States
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Effect of Heterocyclic Ring on Ln III Coordination, Luminescence and Extraction of Diamides of 2,2'-Bipyridyl-6,6'-Dicarboxylic Acid. Molecules 2019; 25:molecules25010062. [PMID: 31878051 PMCID: PMC6983261 DOI: 10.3390/molecules25010062] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 12/13/2019] [Accepted: 12/17/2019] [Indexed: 11/17/2022] Open
Abstract
We have synthesized and examined several complexes of lanthanides with diamides of 2,2′-bipyridyl-6,6′-dicarboxylic acid bearing various hetaryl-based side chains for the elucidation of the effect of the heterocycle on the structure and properties of the ligands. The multigram scale methods for the preparation of various N-alkyl-hetaryls and their diamides were developed. The solid state structure of 6-methyl-2-pyridylamide of 2,2′-bipyridyl-6,6′-dicarboxylic acid possesses a flat structure where the conformation is completely different from that previously observed for N-alkylated 2,2′-bipyridyl-6,6′-dicarboxamides and 2,6-pyridinedicarboxamides. The complexes of new ligands were synthesized and NMR and X-Ray studied their structure in solution and solid state. The results demonstrate that complexes possess the same structures both in solid state and in solution. Stability constants of the complexes were less when comparing with dimethyl-substituted diamides, but higher than for unsubstituted dianilide. Contrarily, the extraction ability of 2-pyridyl-diamide is significantly lower than for corresponding anilide. Specific interaction of extractant with solvent molecules, which is not available for electron-sink pyridine amides, can explain this. The luminescence of new Eu complexes was significantly higher than for all previously 2,2′-bipyridyl-6,6′-dicarboxamides and QY reaches 18%. Asymmetry ratios of Eu complexes were 25% higher when compared other complexes with 2,2′-bipyridyl-6,6′-dicarboxamides, which indicates large deviation from the inversion center.
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