1
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Shukla A, Biswal AS, Chowdhury A, Halder R, Chatterjee S. Aggregation-Induced Modulation of Ground and Excited State Photophysics of 5-( tert-Butyl)-2-Hydroxy-1,3-Isophthalaldehyde (5- tBHI). J Phys Chem B 2024; 128:5437-5453. [PMID: 38662934 DOI: 10.1021/acs.jpcb.4c00258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
5-(tert-Butyl)-2-hydroxy-1,3-isophthalaldehyde (5-tBHI) is a photochromic material susceptible to either excited state proton transfer or excited state intramolecular proton transfer, depending upon the solvent. However, it has also been found to aggregate in the presence of sodium dodecyl sulfate. In this current study, based on the steady-state and time-resolved spectroscopy, supported by crystallography, quantum chemical density functional theory calculation, and molecular dynamics (MD) simulation, we report on the aggregation of this potential single benzene-based emitter (SBBE) in neat solvents as well as solid phase to modulate its photophysics. It has been found that 5-tBHI forms mixed aggregates of different orders, owing to the presence of both enolic and tautomeric forms, to yield tunable emission, although the emission intensity is quenched. These findings suggest that the intramolecular hydrogen bonding of 5-tBHI not only limits intermolecular interactions but also promotes nonradiative deactivation pathways. Hence, designing and structural engineering, with a focus to suppressing intramolecular hydrogen bonding as well as increasing through space conjugation by replacing the aldehydic moieties with bulky aliphatic or aromatic ketonic groups, can be a plausible approach to yielding improved probes with tunable emission and higher fluorescence quantum yields.
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Affiliation(s)
- Aparna Shukla
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines) Dhanbad, Dhanbad 826004 Jharkhand, India
| | - Abhipsa Sekhar Biswal
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines) Dhanbad, Dhanbad 826004 Jharkhand, India
| | - Arkaprava Chowdhury
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra 400076, India
| | - Ritaban Halder
- Department of Chemistry, University of Southern California, Los Angeles, California 90089-1062, United States
| | - Soumit Chatterjee
- Department of Chemistry and Chemical Biology, Indian Institute of Technology (Indian School of Mines) Dhanbad, Dhanbad 826004 Jharkhand, India
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2
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Experimental and Theoretical Studies of the Optical Properties of the Schiff Bases and Their Materials Obtained from o-Phenylenediamine. Molecules 2022; 27:molecules27217396. [DOI: 10.3390/molecules27217396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 11/06/2022] Open
Abstract
Two macrocyclic Schiff bases derived from o-phenylenediamine and 2-hydroxy-5-methylisophthalaldehyde L1 or 2-hydroxy-5-tert-butyl-1,3-benzenedicarboxaldehyde L2, respectively, were obtained and characterized by X-ray crystallography and spectroscopy (UV-vis, fluorescence and IR). X-ray crystal structure determination and DFT calculations for compounds confirmed their geometry in solution and in the solid phase. Moreover, intermolecular interactions in the crystal structure of L1 and L2 were analyzed using 3D Hirshfeld surfaces and the related 2D fingerprint plots. The 3D Hirschfeld analyses show that the most numerous interactions were found between hydrogen atoms. A considerable number of such interactions are justified by the presence of bulk tert-butyl groups in L2. The luminescence of L1 and L2 in various solvents and in the solid state was studied. In general, the quantum efficiency between 0.14 and 0.70 was noted. The increase in the quantum efficiency with the solvent polarity in the case of L1 was observed (λex = 350 nm). For L2, this trend is similar, except for the chloroform. In the solid state, emission was registered at 552 nm and 561 nm (λex = 350 nm) for L1 and L2, respectively. Thin layers of the studied compounds were deposited on Si(111) by the spin coating method or by thermal vapor deposition and studied by scanning electron microscopy (SEM/EDS), atomic force microscopy (AFM), spectroscopic ellipsometry and fluorescence spectroscopy. The ellipsometric analysis of thin materials obtained by thermal vapor deposition showed that the band-gap energy was 3.45 ± 0.02 eV (359 ± 2 nm) and 3.29 ± 0.02 eV (377 ± 2 nm) for L1/Si and L2/Si samples, respectively. Furthermore, the materials of the L1/Si and L2/Si exhibited broad emission. This feature can allow for using these compounds in LED diodes.
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3
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Kashapov R, Razuvayeva Y, Ziganshina A, Lyubina A, Amerhanova S, Sapunova A, Voloshina A, Nizameev I, Salnikov V, Zakharova L. Formation of supramolecular structures in aqueous medium by noncovalent interactions between surfactant and resorcin[4]arene. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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4
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Ullmann S, Börner M, Kahnt A, Abel B, Kersting B. Green‐Emissive Zn
2+
Complex Supported by a Macrocyclic Schiff‐Base/Calix[4]arene‐Ligand: Crystallographic and Spectroscopic Characterization. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Steve Ullmann
- Institut für Anorganische Chemie Universität Leipzig Johannisallee 29 04103 Leipzig Germany
- Institut für Nichtklassische Chemie e.V. Permoserstraße. 15 04318 Leipzig
| | - Martin Börner
- Institut für Anorganische Chemie Universität Leipzig Johannisallee 29 04103 Leipzig Germany
- Leibniz Institute of Surface Engineering (IOM) Department of Functional Surfaces Permoserstr. 15 04318 Leipzig Germany
| | - Axel Kahnt
- Leibniz Institute of Surface Engineering (IOM) Department of Functional Surfaces Permoserstr. 15 04318 Leipzig Germany
| | - Bernd Abel
- Leibniz Institute of Surface Engineering (IOM) Department of Functional Surfaces Permoserstr. 15 04318 Leipzig Germany
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie Universität Leipzig Linnéstraße 2 04103 Leipzig Germany
| | - Berthold Kersting
- Institut für Anorganische Chemie Universität Leipzig Johannisallee 29 04103 Leipzig Germany
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5
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6
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Anandababu A, Anandan S, Syed A, Marraiki N, Ashokkumar M. Upper rim modified calix[4]arene towards selective turn-on fluorescence sensor for spectroscopically silent metal ions. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120133] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Temerova D, Kisel KS, Eskelinen T, Melnikov AS, Kinnunen N, Hirva P, Shakirova JR, Tunik SP, Grachova EV, Koshevoy IO. Diversifying the luminescence of phenanthro-diimine ligands in zinc complexes. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00149c] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Strongly blue fluorescent 1-phenyl-2-(pyridin-2-yl)-1H-phenanthro[9,10-d]imidazole (L1) is a facile block for the construction of multichromophore organic molecules, and simultaneously serves as a chelating diimine ligand.
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Affiliation(s)
- Diana Temerova
- Department of Chemistry
- University of Eastern Finland
- Joensuu
- Finland
| | - Kristina S. Kisel
- Department of Chemistry
- University of Eastern Finland
- Joensuu
- Finland
- St Petersburg State University
| | - Toni Eskelinen
- Department of Chemistry
- University of Eastern Finland
- Joensuu
- Finland
| | - Alexei S. Melnikov
- Centre for Nano- and Biotechnologies
- Peter the Great St Petersburg Polytechnic University
- Russia
| | - Niko Kinnunen
- Department of Chemistry
- University of Eastern Finland
- Joensuu
- Finland
| | - Pipsa Hirva
- Department of Chemistry
- University of Eastern Finland
- Joensuu
- Finland
| | | | | | | | - Igor O. Koshevoy
- Department of Chemistry
- University of Eastern Finland
- Joensuu
- Finland
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8
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Gorbunov A, Ozerov N, Malakhova M, Eshtukov A, Cheshkov D, Bezzubov S, Kovalev V, Vatsouro I. Assembling triazolated calix[4]semitubes by means of copper( i)-catalyzed azide–alkyne cycloaddition. Org Chem Front 2021. [DOI: 10.1039/d1qo00636c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Calix[4]arene-based bis(alkynes) and bis(azides) react with each other under thoroughly tuned CuAAC conditions and produce diverse biscalixarene semitube assemblies linked by two triazole units, which are capable of binding transition metal cations.
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Affiliation(s)
- Alexander Gorbunov
- Department of Chemistry
- M. V. Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Nikolay Ozerov
- Department of Chemistry
- M. V. Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Maria Malakhova
- Department of Chemistry
- M. V. Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Artur Eshtukov
- State Research Institute for Chemistry and Technology of Organoelement Compounds
- 105118 Moscow
- Russia
| | - Dmitry Cheshkov
- State Research Institute for Chemistry and Technology of Organoelement Compounds
- 105118 Moscow
- Russia
| | - Stanislav Bezzubov
- Kurnakov Institute of General and Inorganic Chemistry
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Vladimir Kovalev
- Department of Chemistry
- M. V. Lomonosov Moscow State University
- 119991 Moscow
- Russia
| | - Ivan Vatsouro
- Department of Chemistry
- M. V. Lomonosov Moscow State University
- 119991 Moscow
- Russia
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9
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Kashapov R, Razuvayeva Y, Ziganshina A, Sergeeva T, Lukashenko S, Sapunova A, Voloshina A, Kashapova N, Nizameev I, Salnikov V, Ziganshina S, Gareev B, Zakharova L. Supraamphiphilic Systems Based on Metallosurfactant and Calix[4]resorcinol: Self-Assembly and Drug Delivery Potential. Inorg Chem 2020; 59:18276-18286. [PMID: 33237751 DOI: 10.1021/acs.inorgchem.0c02833] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Metallic amphiphiles are used as building blocks in the construction of nanoscale superstructures, where the hydrophobic effects induce the self-assembly of the nanoparticles of interest. However, the influence of synergizing multiple chemical interactions on an effective design of these structures mostly remains an open question. In this regard, supraamphiphilic systems based on flexible surfactant molecules and rigid macrocycles are being actively developed, but there are few works on the interaction between metallosurfactants and macrocycles. In the present work, the self-assembly and biological properties of a metallosurfactant with calixarene were studied for the first time. The metallosurfactant, a complex between lanthanum nitrate and two 4-aza-1-hexadecylazoniabicyclo[2.2.2]octane bromide units, and calix[4]resorcinol containing sulfonate groups on the upper rim were used to form a novel supraamphiphilic composition. The system formed was studied using a variety of physicochemical methods, including spectrophotometry, NMR, XRF, and dynamic and electrophoretic light scattering. It was found that the most optimal tetraanionic calix[4]resorcinol to dicationic metallosurfactant molar ratio, leading to mixed aggregation upon ion pair complexation, is 2:3. The mixed aggregates formed in the pentamolar concentration range were able to encapsulate hydrophilic substrates, including the anticancer drug cisplatin, the pure form of which is more cytotoxic toward healthy cells than toward diseased cells. Interestingly, the drug loaded into the macrocycle-metallosurfactant particles was less cytotoxic to a healthy Chang liver cell line and more cytotoxic to tumor M-HeLa cells. This selectivity depends on the amount of cisplatin added. The more drug is added to the macrocycle-metallosurfactant composition, the greater the biological activity against cancer cells. Taking into account that the appearance of resistance of cancer cells to drugs, especially to cisplatin, is one of the most important problems in treatment, the results of this work envisage the potential application of a mixed macrocycle-metallosurfactant system for the design of therapeutic cisplatin compositions.
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Affiliation(s)
- Ruslan Kashapov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Str., 420088 Kazan, Russia
| | - Yuliya Razuvayeva
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Str., 420088 Kazan, Russia.,Kazan National Research Technological University, 68 Karl Marx Str., 420015 Kazan, Russia
| | - Albina Ziganshina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Str., 420088 Kazan, Russia
| | - Tatiana Sergeeva
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Str., 420088 Kazan, Russia
| | - Svetlana Lukashenko
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Str., 420088 Kazan, Russia
| | - Anastasiia Sapunova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Str., 420088 Kazan, Russia
| | - Alexandra Voloshina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Str., 420088 Kazan, Russia
| | - Nadezda Kashapova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Str., 420088 Kazan, Russia
| | - Irek Nizameev
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Str., 420088 Kazan, Russia.,Kazan National Research Technological University, 68 Karl Marx Str., 420015 Kazan, Russia
| | - Vadim Salnikov
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 2/31 Lobachevsky Str., 420111 Kazan, Russia.,Kazan (Volga region) Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
| | - Sufia Ziganshina
- Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, 10/7 Sibirskii trakt Str., 420029 Kazan, Russia
| | - Bulat Gareev
- Kazan (Volga region) Federal University, 18 Kremlyovskaya Str., 420008 Kazan, Russia
| | - Lucia Zakharova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Str., 420088 Kazan, Russia.,Kazan National Research Technological University, 68 Karl Marx Str., 420015 Kazan, Russia
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10
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Ullmann S, Hahn P, Mini P, Tuck KL, Kahnt A, Abel B, Gutierrez Suburu ME, Strassert CA, Kersting B. Mixed-ligand lanthanide complexes supported by ditopic bis(imino-methyl)-phenol/calix[4]arene macrocycles: synthesis, structures, and luminescence properties of [Ln 2(L 2)(MeOH) 2] (Ln = La, Eu, Tb, Yb). Dalton Trans 2020; 49:11179-11191. [PMID: 32748924 DOI: 10.1039/d0dt02303e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The lanthanide binding ability of a macrocyclic ligand H6L2 comprising two bis(iminomethyl)phenol and two calix[4]arene units has been studied. H6L2 is a ditopic ligand which provides dinuclear neutral complexes of composition [Ln2(L2)(MeOH)2] (Ln = La (1), Eu (2), Tb (3), and Yb (4)) in very good yield. X-ray crystal structure analyses for 2 and 3 show that (L2)6- accommodates two seven coordinated lanthanide ions in a distorted monocapped trigonal prismatic/octahedral coordination environment. UV-vis spectroscopic titrations performed with La3+, Eu3+, Tb3+ and Yb3+ ions in mixed MeOH/CH2Cl2 solution (I = 0.01 M NBu4PF6) reveal that a 2 : 1 (metal : ligand) stoichiometry is present in solution, with log K11 and K21 values ranging from 5.25 to 6.64. The ratio α = K11/K21 of the stepwise formation constants for the mononuclear (L2 + M = ML2, log K11) and the dinuclear complexes (ML2 + M = M2L2, log K21) was found to be invariably smaller than unity indicating that the binding of the first Ln3+ ion augments the binding of the second Ln3+ ion. The present complexes are less luminescent than other seven-coordinated Eu and Tb complexes, which can be traced to vibrational relaxation of excited EuIII and TbIII states by the coligated MeOH and H2O molecules and/or low-lying ligand-to-metal charge-transfer (LMCT) states.
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Affiliation(s)
- Steve Ullmann
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany.
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11
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Hahn P, Ullmann S, Klose J, Peng Y, Powell AK, Kersting B. Dinuclear Tb and Dy complexes supported by hybrid Schiff-base/calixarene ligands: synthesis, structures and magnetic properties. Dalton Trans 2020; 49:10901-10908. [PMID: 32720658 DOI: 10.1039/d0dt02209h] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The synthesis of the new lanthanide complexes [HNEt3][Dy2(HL1)(L1)] (5), and [Ln2(L2)2] (Ln = TbIII (7), DyIII (8)) supported by the hybrid Schiff-base/calix[4]arene ligands H4L1 (25-[2-((2-methylphenol)imino)ethoxy]-26,27,28-trihydroxy-calix[4]arene) and H3L2 (25-[2-((2-methylpyridine)imino)ethoxy]-26,27,28-trihydroxy-calix[4]arene) are reported. Spectroscopic data (for 5) and X-ray crystallographic analysis (for 7·4MeCN, 8·4MeCN) reveal the presence of dimeric structures, featuring doubly-bridged NO4Ln(μ-O)2LnO4N (5) or N2O3Ln(μ-O)2LnO3N2 cores (7, 8) with seven-coordinated Ln3+ ions. The magnetic properties of polycrystalline samples of 5, 7 and 8 were studied by variable temperature dc and ac magnetic susceptibility measurements. The χ''(T) vs. T plots show no maxima in zero field, but the maxima can be detected under a 3 kOe dc field. The relaxation times τ obey the Arrhenius law above 5 K. Anisotropy barriers of ∼18 cm-1 (26 K) for 5 and ∼23 cm-1 (33 K) for 8 were determined.
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Affiliation(s)
- Peter Hahn
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Steve Ullmann
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Jennifer Klose
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Yan Peng
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany.
| | - Annie K Powell
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany.
| | - Berthold Kersting
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, D-04103 Leipzig, Germany.
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12
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Zhao PC, Chang FF, Feng FD, Huang W. Transmetalation and Demetallization for Open-Oyster-like Non-Ionic Cd(II) Macrocycles. Inorg Chem 2020; 59:7504-7511. [PMID: 32436384 DOI: 10.1021/acs.inorgchem.0c00304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This work designed a nonionic extended dialdehyde 6,6'-(phenylazanediyl)dipicolinaldehyde (PDPA) for constructing Schiff-base macrocyclic complexes with weaker metal-ligand interactions, so as to solve the long-standing challenges of transmetalation and demetallization in macrocyclic complexes. An enantiomeric pair of open-oyster-like 26-membered [2 + 2] Schiff-base macrocyclic dinuclear Cd(II) complexes (S,S-1a, R,R-1b) could be obtained, having S,S/R,R-1,2-diaminocyclohexane (S,S/R,R-DACH) precursors, while Cu(II) ion template only resulted in a mononuclear Schiff-base Cu(II) acyclic complex (S,S-2) accompanied by the half-oxidation of PDPA instead of expected [2 + 2] Cu(II) macrocyclic complexes. It is suggested that the weak oxidization capability of Cu(II) ion is responsible for the formation of S,S-2 because X-ray photoelectron spectroscopy (XPS) for the solid powder of reaction mixture of direct Cu(II) ion template synthesis implies that both Cu(I) and Cu(II) species are present. In fact, corresponding [2 + 2] dinuclear Cu(II) macrocycles and even metal-free macrocycles unsuitable for direct synthesis can be obtained via Cd(II) → Cu(II) transmetalation and Na2S demetalation verified by ESI-MS and UV-vis spectra. In addition, control experiments indicate that the synthesis of metal-free macrocycles via the direct nontemplate method merely results in the mixture of multiple components of [1 + 1], [2 + 2], and [3 + 3] Schiff-base macrocycles, and they are difficult to isolate.
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Affiliation(s)
- Pei-Chen Zhao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu Province 210093, P. R. China
| | - Fei-Fan Chang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu Province 210093, P. R. China
| | - Fan-Da Feng
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu Province 210093, P. R. China
| | - Wei Huang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu Province 210093, P. R. China.,Shenzhen Research Institute of Nanjing University, Shenzhen 518057, P. R. China
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13
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Liu CH, Guan QL, Yang XD, Bai FY, Sun LX, Xing YH. Polyiodine-Modified 1,3,5-Benzenetricarboxylic Acid Framework Zn(II)/Cd(II) Complexes as Highly Selective Fluorescence Sensors for Thiamine Hydrochloride, NACs, and Fe3+/Zn2+. Inorg Chem 2020; 59:8081-8098. [DOI: 10.1021/acs.inorgchem.0c00391] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Chun-Hong Liu
- College of Chemistry and Chemical Engineering, Liaoning Normal University, Huanghe Road 850#, Dalian 116029, P. R. China
| | - Qing-Lin Guan
- College of Chemistry and Chemical Engineering, Liaoning Normal University, Huanghe Road 850#, Dalian 116029, P. R. China
| | - Xiao-Dong Yang
- College of Chemistry and Chemical Engineering, Liaoning Normal University, Huanghe Road 850#, Dalian 116029, P. R. China
| | - Feng-Ying Bai
- College of Chemistry and Chemical Engineering, Liaoning Normal University, Huanghe Road 850#, Dalian 116029, P. R. China
| | - Li-Xian Sun
- Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, P. R. China
| | - Yong-Heng Xing
- College of Chemistry and Chemical Engineering, Liaoning Normal University, Huanghe Road 850#, Dalian 116029, P. R. China
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14
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Laube C, Taut JA, Kretzschmar J, Zahn S, Knolle W, Ullman S, Kahnt A, Kersting B, Abel B. Light controlled oxidation by supramolecular Zn( ii) Schiff-base complexes. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00980f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Application of Schiff-base ligands for the controlled zinc ion induced formation of electronic triplet states and the initialisation of photoreactivity.
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Affiliation(s)
- Christian Laube
- Leibniz Institute for Surface Engineering (IOM)
- Department Functional Surfaces
- D-04318 Leipzig
- Germany
- Department of Chemistry
| | - Josef Anton Taut
- Leibniz Institute for Surface Engineering (IOM)
- Department Functional Surfaces
- D-04318 Leipzig
- Germany
| | - Jonas Kretzschmar
- Institute of Inorganic Chemistry
- University Leipzig
- 04103 Leipzig
- Germany
| | - Stefan Zahn
- Leibniz Institute for Surface Engineering (IOM)
- Department Functional Surfaces
- D-04318 Leipzig
- Germany
| | - Wolfgang Knolle
- Leibniz Institute for Surface Engineering (IOM)
- Department Functional Surfaces
- D-04318 Leipzig
- Germany
| | - Steve Ullman
- Institute of Inorganic Chemistry
- University Leipzig
- 04103 Leipzig
- Germany
| | - Axel Kahnt
- Leibniz Institute for Surface Engineering (IOM)
- Department Functional Surfaces
- D-04318 Leipzig
- Germany
| | - Berthold Kersting
- Institute of Inorganic Chemistry
- University Leipzig
- 04103 Leipzig
- Germany
| | - Bernd Abel
- Leibniz Institute for Surface Engineering (IOM)
- Department Functional Surfaces
- D-04318 Leipzig
- Germany
- Wilhelm-Ostwald-Institute of Physical und Theoretical Chemistry
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15
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Chang FF, Li WQ, Feng FD, Huang W. Construction and Photoluminescent Properties of Schiff-Base Macrocyclic Mono-/Di-/Trinuclear Zn II Complexes with the Common 2-Ethylthiophene Pendant Arm. Inorg Chem 2019; 58:7812-7821. [PMID: 31185551 DOI: 10.1021/acs.inorgchem.9b00454] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new flexible 2-ethylthiophene pendant-armed dialdehyde (H2tdd) was reacted with 1,3-propanediamine, [( S, S),( R, R),(±)]-1,2-diaminocyclohexane, and 1,2-bis(2-aminoethoxy)ethane, giving birth to 36-membered [2 + 2] Schiff-base macrocyclic trinuclear ZnII complex 1, 18-membered [1 + 1] mononuclear ZnII macrocycles 2-4, chiral/racemic 34-membered [2 + 2] dinuclear ZnII complexes 5-9, and 46-membered [2 + 2] dinuclear ZnII macrocycles 10-12 via ZnII ion template-assisted Schiff-base condensation. It is worth mentioning that the secondary template effects for nitrate and halide counterions have been observed in the 1,3-propanediamine involved imine condensation. In all [2 + 2] ZnII macrocycles, dinuclear complexes 5-9 display a full-folded molecular conformation, while trinuclear complex 1 and dinuclear complexes 10-12 exhibit distinct half-folded structures in the presence or absence of intramolecular π-π stacking interactions between two phenolic rings of the dialdehyde component. Interestingly, a solvent-induced single-crystal-to-single-crystal transformation was first achieved for two types of solvated mononuclear macrocycles 3a and 3b (H2O vs CH3CN) with folded and unfolded ligand conformations. In addition, the photoluminescent properties were studied for this family of Schiff-base macrocyclic ZnII complexes as well as the dialdehyde precursor H2tdd.
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Affiliation(s)
- Fei-Fan Chang
- State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , Jiangsu Province , 210093 , P. R. China
| | - Wen-Qi Li
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Science , Nanjing University , Nanjing 210093 , P. R. China
| | - Fan-Da Feng
- State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , Jiangsu Province , 210093 , P. R. China
| | - Wei Huang
- State Key Laboratory of Coordination Chemistry, Nanjing National Laboratory of Microstructures, School of Chemistry and Chemical Engineering , Nanjing University , Nanjing , Jiangsu Province , 210093 , P. R. China
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Back O, Förster C, Basché T, Heinze K. Alkali Blues: Blue-Emissive Alkali Metal Pyrrolates. Chemistry 2019; 25:6542-6552. [PMID: 30786063 DOI: 10.1002/chem.201806103] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Indexed: 12/25/2022]
Abstract
2-Iminopyrroles [HtBu L, 4-tert-butyl phenyl(pyrrol-2-ylmethylene)amine] are non-fluorescent π systems. However, they display blue fluorescence after deprotonation with alkali metal bases in the solid state and in solution at room temperature. In the solid state, the alkali metal 2-imino pyrrolates, M(tBu L), aggregate to dimers, [M(tBu L)(NCR)]2 (M=Li, R=CH3 , CH(CH3 )CNH2 ), or polymers, [M(tBu L)]n (M=Na, K). In solution (solv=CH3 CN, DMSO, THF, and toluene), solvated, uncharged monomeric species M(tBu L)(solv)m with N,N'-chelated alkali metal ions are present. Due to the electron-rich pyrrolate and the electron-poor arylimino moiety, the M(tBu L) chromophore possesses a low-energy intraligand charge-transfer (ILCT) excited state. The chelated alkali cations rigidify the chromophore, restricting intramolecular motions (RIM) by the chelation-enhanced fluorescence (CHEF) effect in solution and, consequently, switch-on a blue fluorescence emission.
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Affiliation(s)
- Oliver Back
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Christoph Förster
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Thomas Basché
- Institute of Physical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
| | - Katja Heinze
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, 55128, Mainz, Germany
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Sutariya PG, Soni H, Gandhi SA, Pandya A. Luminescent behavior of pyrene-allied calix[4]arene for the highly pH-selective recognition and determination of Zn2+, Hg2+ and I−via the CHEF-PET mechanism: computational experiment and paper-based device. NEW J CHEM 2019. [DOI: 10.1039/c9nj01388a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In this article, for the first time, we have reported a novel CHEF-PET fluorescence sensor L based on calix[4]arene containing four pyrene groups as binding sites, which is highly selective and sensitive towards Zn2+, Hg2+ and I−.
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Affiliation(s)
- Pinkesh G. Sutariya
- Department of Chemistry
- Bhavan's Shree I. L. Pandya. Arts-Science and Smt. J. M. Shah Commerce College
- Sardar Patel University
- V. V. Nagar
- India
| | - Heni Soni
- Department of Chemistry
- Bhavan's Shree I. L. Pandya. Arts-Science and Smt. J. M. Shah Commerce College
- Sardar Patel University
- V. V. Nagar
- India
| | - Sahaj A. Gandhi
- Department of Physics
- Bhavan's Shree I. L. Pandya. Arts-Science and Smt. J. M. Shah Commerce College
- Sardar Patel University
- V. V. Nagar
- India
| | - Alok Pandya
- Department of Physical Sciences
- Institute of Advanced Research
- Gandhinagar
- India
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Kennedy SR, Main MU, Pulham CR, Ling I, Dalgarno SJ. A self-assembled nanotube supported by halogen bonding interactions. CrystEngComm 2019. [DOI: 10.1039/c8ce01824c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Upper-rim halogenation of a calix[4]arene modulates the packing of self-assembled nanotubes through the formation of complementary halogen bonding interactions.
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Affiliation(s)
| | - Mawgan U. Main
- Institute of Chemical Sciences
- Heriot-Watt University
- Edinburgh
- UK
| | | | - Irene Ling
- School of Science
- Monash University Malaysia
- Bandar Sunway
- Malaysia
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Ullmann S, Hahn P, Blömer L, Mehnert A, Laube C, Abel B, Kersting B. Dinuclear lanthanide complexes supported by a hybrid salicylaldiminato/calix[4]arene-ligand: synthesis, structure, and magnetic and luminescence properties of (HNEt3)[Ln2(HL)(L)] (Ln = SmIII, EuIII, GdIII, TbIII). Dalton Trans 2019; 48:3893-3905. [PMID: 30815651 DOI: 10.1039/c9dt00292h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Salicylaldimine/calix[4]arenes support dinuclear, triply bridged, luminescent, lanthanide complexes.
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Affiliation(s)
- Steve Ullmann
- Institut für Anorganische Chemie
- Universität Leipzig
- 04103 Leipzig
- Germany
| | - Peter Hahn
- Institut für Anorganische Chemie
- Universität Leipzig
- 04103 Leipzig
- Germany
| | - Laura Blömer
- Institut für Anorganische Chemie
- Universität Leipzig
- 04103 Leipzig
- Germany
| | - Anne Mehnert
- Institut für Anorganische Chemie
- Universität Leipzig
- 04103 Leipzig
- Germany
| | - Christian Laube
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie
- Universität Leipzig
- D-04103 Leipzig
- Germany
| | - Bernd Abel
- Leibniz Institute for Surface Engineering (IOM)
- Department Functional Surfaces
- D-04318 Leipzig
- Germany
- Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie
| | - Berthold Kersting
- Institut für Anorganische Chemie
- Universität Leipzig
- 04103 Leipzig
- Germany
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Affiliation(s)
- Teresa L. Mako
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
| | - Joan M. Racicot
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
| | - Mindy Levine
- Department of Chemistry, University of Rhode Island, 140 Flagg Road, Kingston, Rhode Island 02881, United States
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Ullmann S, Schnorr R, Laube C, Abel B, Kersting B. Photoluminescence properties of tetrahedral zinc(ii) complexes supported by calix[4]arene-based salicylaldiminato ligands. Dalton Trans 2018; 47:5801-5811. [PMID: 29644369 DOI: 10.1039/c8dt00757h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and photophysical properties of four new hybrid salicylaldiminato-calix[4]arene ligands and their corresponding zinc(ii) complexes are described. The Schiff bases were obtained from condensation reactions between cone-25,27-di(aminoethoxy)-26,28-dihydroxy-calix[4]arene and salicylaldehyde (H2L1) or o-vanillin (H2L2) and 1,3-alt-25,27-di(aminoethoxy)-26,28-di(n-propyloxy)-calix[4]arene and 3,5-di-tert-butyl-salicylaldehyde (H2L3) or o-vanillin (H2L4). Complexation reactions were investigated by ESI-MS, IR, NMR, UV-vis absorption and steady-state and time resolved fluorescence spectroscopy, and X-ray crystallography. All ligands support 1 : 1 complexes (ZnL1-ZnL4), with equilibrium constants derived from absorption spectrophotometry in the range log K11 = 5.5-8.2 (MeCN or MeOH/CH2Cl2, I = 0.01 M). The zinc complexes show blue fluorescence, both in solution as well as in the solid state, with λem, Φf, and τ ranging from 472-504 nm, 0.11-0.60, and 2-9 ns, respectively. The nature of the substituents on the salicylaldiminato fragments was found to be the main parameter that influences the photophysical properties of the zinc complexes. Insights into the electronic nature of the UV-vis transitions were obtained with time dependent density functional theory (TD-DFT) calculations.
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Affiliation(s)
- Steve Ullmann
- Institut für Anorganische Chemie, Universität Leipzig, Johannisallee 29, 04103 Leipzig, Germany.
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Malthus SJ, Cameron SA, Brooker S. Improved Access to 1,8-Diformyl-carbazoles Leads to Metal-Free Carbazole-Based [2 + 2] Schiff Base Macrocycles with Strong Turn-On Fluorescence Sensing of Zinc(II) Ions. Inorg Chem 2018; 57:2480-2488. [PMID: 29442503 DOI: 10.1021/acs.inorgchem.7b02763] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Development of a new and high yielding synthetic route to 1,8-diformyl-carbazoles 3 (3a 3,6-di- tert-butyl substituted; 3b 3,6-unsubstituted) is reported. Use of a Heck coupling reaction, followed by ozonolysis, has greatly facilitated the preparation of these interesting head units in useful quantities. An initial foray into the new generations of Schiff base macrocycles that ready access to these head units (3) opens up, has led to the direct (i.e., metal-free) synthesis of two [2 + 2] macrocycles from 3a or 3b with 1,2-diaminoethane, H2LtBu (4a) and H2LH (4b), respectively, obtained as yellow powders in high yields (87-88%). The dizinc complex [Zn2LH(OAc)2] (5b) was isolated as a bright yellow solid in 83% yield, by 1:2:2 reaction of H2LH with zinc(II) acetate and triethylamine. Aldehydes 3a and 3b, macrocycle H2LH, and complex [Zn2LH(OAc)2] (5b) have been structurally characterized. The carbazole NH makes bifurcated hydrogen bonds with the pair of flanking 1,8-diformyl-moieties in 3, or 1,8-diimine-moieties in H2LH, leading to a flat, all- cis conformation. The stepped conformation of the metal-free macrocycle H2LH is retained in [Zn2LH(OAc)2], despite deprotonation and binding of two zinc(II) centers within the two tridentate pockets. The N3O2 coordination of the zinc ions is completed by one μ1,1- and one μ1,3- bridging acetate anion. Excitation of nanomolar [Zn2LH(OAc)2] in DMF at 335 nm results in clearly visible blue fluorescence (λmax = 460 nm). Further studies on the H2LH macrocycle revealed turn-on fluorescence, with selectivity (over Ca2+, Mg2+ and a range of 3d dications) and nanomolar sensitivity for zinc(II) ions, highlighting one of the many potential applications for these new carbazole-based Schiff base macrocycles.
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Affiliation(s)
- Stuart J Malthus
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology , University of Otago , P.O. Box 56 , Dunedin 9054 , New Zealand
| | - Scott A Cameron
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology , University of Otago , P.O. Box 56 , Dunedin 9054 , New Zealand
| | - Sally Brooker
- Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology , University of Otago , P.O. Box 56 , Dunedin 9054 , New Zealand
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Transmetalation for Flexible Pendant-Armed Schiff-Base Macrocyclic Complexes Influenced by Halide Effects. Inorg Chem 2018; 57:1438-1448. [PMID: 29323889 DOI: 10.1021/acs.inorgchem.7b02835] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Three 46-membered [2 + 2] pendant-armed Schiff-base macrocyclic dinuclear CdII and CuII complexes (2a, 2b, and 3b) and one 23-membered [1 + 1] CuII macrocycle 4a were prepared from the template-directed condensation reactions between 1,2-bis(2-aminoethoxy)-ethane and extended Cl-dialdehyde in the presence of CdX2 and CuX2 (X = Cl and Br), in which halide effects play important roles in the organization of final macrocyclic complexes in addition to the dominant influence of metal cations. Transmetalation was intensively studied among these CdII and CuII complexes with large and flexible macrocyclic ligands, including two previously synthesized dinuclear ZnII macrocycles (1a and 1b). Our results indicate that ZnII → CuII and CdII → CuII transmetalation proceeds more quickly than that from CdII to ZnII, and all the processes are found to be irreversible. It is noted that a [2 + 2] heterodinuclear CdIIZnII macrocyclic intermediate could be detected by ESI-MS together with [2 + 2] homodinuclear CdII and ZnII macrocyclic complexes. Furthermore, distinct halide behavior was observed in the in situ CdII → CuII and ZnII → CuII metal-ion exchange. That is to say, [2 + 2] macrocycles (1a and 2a) could be converted to [1 + 1] macrocycles 4a and 4b under the reflux condition in the case of CuCl2, accompanied by the configurational transformation from half-folded dinuclear ZnII and CdII to unfolded CuII macrocyclic skeleton. In contrast, CuBr2 leads to a highly efficient transmetalation to corresponding [2 + 2] dinuclear CuII complex 3b from both 1b and 2b no matter the experimental condition used.
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