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Brahma R, Baruah JB. Self-Assemblies of Zinc Complexes for Aggregation-Induced Emission Luminogen Precursors. ACS OMEGA 2020; 5:3774-3785. [PMID: 32118194 PMCID: PMC7045797 DOI: 10.1021/acsomega.0c00136] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Accepted: 01/29/2020] [Indexed: 06/10/2023]
Abstract
Positional isomers of zinc-nitrobenzoate complexes possessing pyridine -3-(or-4-) carboxamide are used for a comparative theoretical and experimental study to understand their utility as model complexes to understand the role of metal-to-ligand charge transfer in aggregation-induced emission (AIE). Among the five different model zinc complexes, four of them are non-ionic, and one is an ionic complex. The frontier molecular energy levels of different combinations of the positional isomeric complexes and the absorption maximum were ascertained by density functional theory calculations. The PolyQ value obtained from solid samples of each complex is different. Shifts in the emissions to higher wavelengths than the expected emission for the S1 to S0 transition were observed due to aggregations. The highest value of PolyQ among the complexes was 13.56% observed for emission at 439 nm (λex = 350) of the non-ionic complex, namely, (di-aqua)bis(pyridine-3-carboxamide)di(2-nitrobenzoato)zinc(II) monohydrate. Close resemblance in emission lifetime decay profiles of the solid samples of those complexes and the respective solutions of those complexes in dimethyl sulfoxide with or without water showed a common trend, suggesting aggregation-induced emission in each case. Aggregation-induced emission caused by adding water in dimethyl sulfoxide solution of each complex showed an initial increase without a shift in the emission wavelength followed by a quenching with a shift of the respective emission peak to a short wavelength. Dynamic light scattering studies showed an increase in the average particle sizes upon an increase in the concentration of water. This indicated initial participation of water molecules to form aggregates with the complexes, favoring an increase in the AIE intensity. Aggregation of each complex changes with the concentration of water, and an increase in the concentration of water beyond a characteristic limit causes lowering of the emission intensity to the short wavelength.
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Guo PY, Ma DY, Guo HF. A twofold interpenetrating three-dimensional heterometallic metal–organic framework with pcu topology based on 2-methylbiphenyl-4,4′-dicarboxylic acid. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2017; 73:470-475. [DOI: 10.1107/s2053229617006829] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 05/05/2017] [Indexed: 11/10/2022]
Abstract
The 2-methylbiphenyl-4,4′-dicarboxylate (mbpdc2−) ligand has versatile coordination modes and can be used to construct multinuclear structures. Despite this, reports of the synthesis of coordination complexes involving this ligand are scarce. The title compound, poly[[triaquadi-μ3-hydroxido-hexakis(μ4-2-methylbiphenyl-4,4′-dicarboxylato)calcium(II)hexazinc(II)] monohydrate], {[CaZn6(C15H10O4)6(OH)2(H2O)3]·H2O}
n
, has been prepared by the hydrothermal assembly of Zn(NO3)2·6H2O, CaCl2 and 2-methylbiphenyl-4,4′-dicarboxylic acid. Two ZnII atoms adopt a four-coordinated distorted tetrahedral geometry by bonding to three O atoms from three different 2-methylbiphenyl-4,4′-dicarboxylate (mbpdc2−) dianionic ligands and one bridging hydroxide O atom. For the remaining ZnII atom, a five-coordinate environment is completed half the time by one carboxylate O atom, and then the same carboxylate O atom and an aqua O atom are present the other half of the time, giving a six-coordinate environment. The CaII atom is coordinated by six O atoms to give an octahedral coordination geometry. The supramolecular secondary building unit (SBU) is a hamburger-like heptanuclear unit (Zn6CaO30) and these units are interconnected through mbpdc2− carboxylate groups to generate a three-dimensional framework with the pcu topology. The single net leaves voids that are filled by mutual interpenetration of an independent equivalent framework in a twofold interpenetrating architecture. The title compound shows thermal stability up to 673 K. The excitation and luminescence data showed the emission of a bright-blue fluorescence.
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Tarai A, Baruah JB. Competing phenol–imidazole and phenol–phenol interactions in the flexible supramolecular environment of N,N′-bis(3-imidazol-1-ylpropyl)naphthalenediimide causing domain expansion. NEW J CHEM 2017. [DOI: 10.1039/c7nj02322g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Spectroscopic and crystallographic studies on cocrystals of N,N′-bis(3-imidazol-1-yl-propyl)naphthalenediimide (L) with a series of phenolic compounds have revealed that competition to form phenol–imidazole and phenol–phenol synthons causes domain expansion.
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Affiliation(s)
- Arup Tarai
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781 039
- India
| | - Jubaraj B. Baruah
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781 039
- India
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Vishnoi P, Sharma SK, Kaleeswaran D, Murugavel R. Zinc Dialkylhydroxybenzoates with Unusual Structures: First Example of a Discrete Three-Blade Paddle-Wheel and a Solvent Engulfed Coordination Polymer. ChemistrySelect 2016. [DOI: 10.1002/slct.201601853] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Pratap Vishnoi
- Department of Chemistry; Indian Institute of Technology Bombay; Mumbai India 400 076
| | - Sunil K. Sharma
- Department of Chemistry; Indian Institute of Technology Bombay; Mumbai India 400 076
| | - D. Kaleeswaran
- Department of Chemistry; Indian Institute of Technology Bombay; Mumbai India 400 076
| | - Ramaswamy Murugavel
- Department of Chemistry; Indian Institute of Technology Bombay; Mumbai India 400 076
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Peresypkina E, Virovets A, Scheer M. Supramolecular Synthons: Will Giant Rigid Superspheres Do? CRYSTAL GROWTH & DESIGN 2016; 16:2335-2341. [PMID: 27081373 PMCID: PMC4827143 DOI: 10.1021/acs.cgd.6b00136] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 02/14/2016] [Indexed: 06/05/2023]
Abstract
For the first time, the concept of supramolecular synthons was applied to giant rigid superspheres based on pentaphosphaferrocene [CpRFe(η5-P5)] (R = Me, Et) and Cu(I) halides, which reach 2.1-3.0 nm in diameter. Two supramolecular synthons, σ-π and π-π, are discovered based on halogen···CpR and Cp*···Cp* specific interactions, respectively. The geometry of the synthons is reproducible in a series of crystal structures of various supramolecules. The σ-π synthon alone is realized more frequently for Br-containing superspheres. A combination of the σ-π and π-π synthons is more typical for Cl-containing supramolecules. Each supramolecule can bear up to nine synthons to give mostly 2D and 3D architectures.
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Affiliation(s)
- Eugenia Peresypkina
- Institut für Anorganische Chemie, Universität Regensburg, Universitätsstr. 31, Regensburg 93053, Germany; Nikolaev Institute of Inorganic Chemistry SB RAS, Ak. Lavrentiev Prosp. 3, Novosibirsk 630090, Russia
| | - Alexander Virovets
- Institut für Anorganische Chemie, Universität Regensburg, Universitätsstr. 31, Regensburg 93053, Germany; Nikolaev Institute of Inorganic Chemistry SB RAS, Ak. Lavrentiev Prosp. 3, Novosibirsk 630090, Russia
| | - Manfred Scheer
- Institut für Anorganische Chemie, Universität Regensburg , Universitätsstr. 31, Regensburg 93053, Germany
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Roy S, Bauza A, Frontera A, Schaper F, Banik R, Purkayastha A, Reddy BM, Sridhar B, Drew MG, Das SK, Das S. Structural diversity and non-covalent interactions in Cd(II) and Zn(II) complexes derived from 3,5-dinitrobenzoic acid and pyridine: Experimental and theoretical aspects. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2015.10.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Reger DL, Leitner A, Smith MD. Cesium complexes of naphthalimide substituted carboxylate ligands: Unusual geometries and extensive cation-π interactions. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.01.046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Xu ZX, Kang Y, Han ML, Li DS, Zhang J. Integration of a semi-rigid proline ligand and 4,4'-bipyridine in the synthesis of homochiral metal-organic frameworks with helices. Dalton Trans 2015; 44:11052-6. [PMID: 25994235 DOI: 10.1039/c5dt01151e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A pair of 3-D homochiral metal-organic frameworks (HMOFs) based on a mixed semi-rigid 5-(2-carboxypyrrolidine-1-carbonyl)isophthalate (PIA) ligand and rigid 4,4'-bipyridine (bipy), [Co3((R)-PIA)2(bipy)3]·6H2O (1-D) and [Co3((S)-PIA)2(bipy)3]·6H2O (1-L) are synthesized and structurally characterized. They are enantiomers and exhibit three-dimensional open frameworks. In each structure, the PIA ligands link the Co centers into homochiral frameworks with large open channels that are occupied by the bipy ligands. Interesting helical chains built from the connectivity between PIA ligands and Co centers are presented. Antiferromagnetic coupling is observed in 1-D. These results demonstrated that the mixed ligand approach is successful for the construction of HMOFs.
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Affiliation(s)
- Zhong-Xuan Xu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, the Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
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Khavasi HR, Mir Mohammad Sadegh B. Influence of N-heteroaromatic π–π stacking on supramolecular assembly and coordination geometry; effect of a single-atom change in the ligand. Dalton Trans 2015; 44:5488-502. [DOI: 10.1039/c4dt03518f] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A study on how the polarization of aromatic systems, through the introduction of a nitrogen heteroatom, affects the π–π interactions and crystal packing of mercury coordination compounds.
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Nath JK, Baruah JB. Cyclic aromatic imides as a potential class of molecules for supramolecular interactions. CrystEngComm 2015. [DOI: 10.1039/c5ce01485a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Prospects of stacking interactions of imides beneficial to generation of new soft materials are projected by analysing examples of primary building blocks that provide a basis for understanding at the molecular level.
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Affiliation(s)
- Jayanta K. Nath
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039, India
| | - Jubaraj B. Baruah
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati 781 039, India
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Beobide G, Castillo O, Luque A, Pérez-Yáñez S. Porous materials based on metal–nucleobase systems sustained by coordination bonds and base pairing interactions. CrystEngComm 2015. [DOI: 10.1039/c5ce00005j] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two approaches to metal–nucleobase porous materials: coordination bond sustained MOFs and hydrogen bond pairing based SMOFs.
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Affiliation(s)
- Garikoitz Beobide
- Departamento de Química Inorgánica
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco (UPV/EHU)
- E-48080 Bilbao, Spain
| | - Oscar Castillo
- Departamento de Química Inorgánica
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco (UPV/EHU)
- E-48080 Bilbao, Spain
| | - Antonio Luque
- Departamento de Química Inorgánica
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco (UPV/EHU)
- E-48080 Bilbao, Spain
| | - Sonia Pérez-Yáñez
- Departamento de Química Inorgánica
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco (UPV/EHU)
- E-48080 Bilbao, Spain
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Kitchen JA, Martinho PN, Morgan GG, Gunnlaugsson T. Synthesis, crystal structure and EPR spectroscopic analysis of novel copper complexes formed from N-pyridyl-4-nitro-1,8-naphthalimide ligands. Dalton Trans 2014; 43:6468-79. [DOI: 10.1039/c3dt53323a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of two new monodentate pyridyl based 4-nitro-1,8-naphthalimide ligands and their corresponding Cu-complexes (using various salts) is described. Of these, complexes 1–3 and 5, all gave rise to structures that were characterised by X-ray crystallography and EPR.
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Affiliation(s)
- Jonathan A. Kitchen
- School of Chemistry
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2, Ireland
- Chemistry
| | - Paulo N. Martinho
- School of Chemistry and Chemical Biology
- University College Dublin
- Dublin 4, Ireland
- Departamento de Química e Bioquímica
- CQB
| | - Grace G. Morgan
- School of Chemistry and Chemical Biology
- University College Dublin
- Dublin 4, Ireland
| | - Thorfinnur Gunnlaugsson
- School of Chemistry
- Trinity Biomedical Sciences Institute
- Trinity College Dublin
- Dublin 2, Ireland
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Khavasi HR, Mir Mohammad Sadegh B. Effect of robust π–π stacking synthon on the formation of mercury coordination compounds; an unusual pseudo-square planar geometry. Dalton Trans 2014; 43:5564-73. [PMID: 24549003 DOI: 10.1039/c3dt53220h] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, three Hg(ii) complexes, [HgCl2(L2-naph)]n, 1, [HgBr2(L2-naph)]n, 2 and [HgI2(L2-naph)2], 3 where L2-naph is N-(naphthalene-2-yl)pyrazine-2-carboxamide ligand have been synthesized and characterized.
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Heptanuclear zinc carboxylate complex: New supramolecular building unit and unique supramolecular architecture. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.06.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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