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Dyakonenko VV, Khomenko DM, Doroshchuk RO, Ivanova GV, Lampeka RD. Crystal structure and Hirshfeld surface analysis of di-chlorido-[2-(3-cyclo-pentyl-1,2,4-triazol-5-yl-κ N 4)pyridine-κ N]palladium(II) di-methyl-formamide monosolvate. Acta Crystallogr E Crystallogr Commun 2024; 80:956-960. [PMID: 39267875 PMCID: PMC11389673 DOI: 10.1107/s2056989024007801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2024] [Accepted: 08/07/2024] [Indexed: 09/15/2024]
Abstract
This study presents the synthesis, characterization and Hirshfeld surface analysis of the title mononuclear complex, [PdCl2(C12H14N4)]·C3H7NO. The compound crystalizes in the P21/c space group of the monoclinic system. The asymmetric unit contains one neutral complex Pd(HL c-Pe)Cl2 [HL c-Pe is 2-(3-cyclo-pentyl-1,2,4-triazol-5-yl)pyridine] and one mol-ecule of DMF as a solvate. The Pd atom has a square-planar coordination. In the crystal, mol-ecules are linked by inter-molecular N-H⋯O and C-H⋯N hydrogen bonds, forming layers parallel to the bc plane. A Hirshfeld surface analysis showed that the H⋯H contacts dominate the crystal packing with a contribution of 41.4%. The contribution of the N⋯H/H⋯N and H⋯O/O⋯H inter-actions is somewhat smaller, amounting to 12.4% and 5%, respectively.
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Affiliation(s)
- Viktoriya V Dyakonenko
- SSI "Institute for Single Crystals" of National Academy of Sciences of Ukraine, Nauki Ave 60, Kharkiv 61001, Ukraine
- V I Vernadskii Institute of General and Inorganic Chemistry of National, Academy of Sciences of Ukraine, Prospect Palladina 32/34 03680 Kyiv Ukraine
| | - Dmytro M Khomenko
- Department of Chemistry, Taras Shevchenko National University of Kyiv, 12, Hetman Pavlo Skoropadskyi st.,01033 Kyiv, Ukraine
- Enamine Ltd. (www.enamine.net), Winston Churchill str. 78, 02094 Kyiv, Ukraine
| | - Roman O Doroshchuk
- Department of Chemistry, Taras Shevchenko National University of Kyiv, 12, Hetman Pavlo Skoropadskyi st.,01033 Kyiv, Ukraine
- Enamine Ltd. (www.enamine.net), Winston Churchill str. 78, 02094 Kyiv, Ukraine
| | - Ganna V Ivanova
- Department of Chemistry, Taras Shevchenko National University of Kyiv, 12, Hetman Pavlo Skoropadskyi st.,01033 Kyiv, Ukraine
| | - Rostyslav D Lampeka
- Department of Chemistry, Taras Shevchenko National University of Kyiv, 12, Hetman Pavlo Skoropadskyi st.,01033 Kyiv, Ukraine
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2
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Cuerva C, Cano M, Schmidt R. Improving the mesomorphism in bispyrazolate Pd(II) metallomesogens: an efficient platform for ionic conduction. Dalton Trans 2023; 52:4684-4691. [PMID: 36779291 DOI: 10.1039/d2dt03754h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
The introduction of structural asymmetry in metallomesogens is an established strategy to improve their mesomorphic behaviour in terms of lower melting temperatures and higher stability ranges of the mesophase, which is particularly important for metallomesogens that have potential application as electrolytes that require wide operational temperature ranges. Here in this work, a novel series of unsymmetrical bis(isoquinolinylpyrazolate)palladium(II) compounds bearing four alkyl side-chains with different lengths are described. Rectangular and hexagonal columnar mesophases were formed with low melting temperatures of 42-45 °C in most cases, whereas the clearing temperatures reached values up to 412 °C. The charge transport properties have been studied by complex impedance spectroscopy, showing that the mesophase favours proton conduction in the absence of water or humidity. The exceptional thermal stability of these species makes them promising candidates to act as a platform for ionic conduction via the nanochannels originated in the columnar mesophases. The results presented confirm that introducing structural asymmetry in the Pd(II) metallomesogens studied is a valid strategy to enhance the liquid crystalline properties, which opens new ways to develop water-free electrolytes based on unsymmetrical bis(isoquinolinylpyrazolate) Pd(II) compounds for potential applications such as proton exchange membranes (PEMs).
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Affiliation(s)
- Cristián Cuerva
- MatMoPol Group. Department of Inorganic Chemistry, Faculty of Chemical Sciences, Complutense University of Madrid, Ciudad Universitaria, E-28040 Madrid, Spain.
| | - Mercedes Cano
- MatMoPol Group. Department of Inorganic Chemistry, Faculty of Chemical Sciences, Complutense University of Madrid, Ciudad Universitaria, E-28040 Madrid, Spain.
| | - Rainer Schmidt
- GFMC. Departamento de Física de Materiales, Universidad Complutense de Madrid, Ciudad Universitaria, E-28040 Madrid, Spain.
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3
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Zou G, Zhang S, Feng S, Li Q, Yang B, Zhao Y, Luo K, Wen TB. Cyclometalated Platinum(II) Metallomesogens Based on Half-Disc-Shaped β-Diketonate Ligands with Hexacatenar: Crystal Structures, Mesophase Properties, and Semiconductor Devices. Inorg Chem 2022; 61:11702-11714. [PMID: 35848492 DOI: 10.1021/acs.inorgchem.2c01327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of new half-disc-shaped platinum(II) complexes [Pt(ppy)(ALn-6OCnH2n+1)] (Pt-An), [Pt(ppyF)(ALn-6OCnH2n+1)] (Pt-Bn), and [Pt(ppyCF3)(ALn-6OCnH2n+1)] (Pt-Cn) (ALn-6OCnH2n+1 = 1,3-bis(3,4,5-trialkoxyphenyl)propane-1,3-dionato; n = 1, 6, 12) with concise structures have been designed and synthesized, in which 2-phenylpyridine (ppy) derivatives were used as cyclometalated ligands and hexacatenar β-diketonate derivatives ALn-6OCnH2n+1 as auxiliary ligands. The single-crystal data of the methoxy diketonate analogues Pt-A1, Pt-B1, and Pt-C1 indicate that they all display excellent square planarity. These platinum(II) complexes show a certain emission tunability (ranging from λ = 506-535 nm) by the introduction of fluorine or trifluoromethyl into ppy. Thermal studies reveal that the fluorine-substituted complexes are liquid crystals but the trifluoromethyl-substituted complexes are not. The platinum(II) complexes Pt-A12, Pt-B6, and Pt-B12 can form a hexagonal columnar mesophase via intermolecular π-π interactions. In addition, compared to the reported platinum(II) metallomesogens, Pt-A12 and Pt-B12 exhibit improved ambipolar carrier mobility behaviors in semiconductor devices at the liquid crystal states.
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Affiliation(s)
- Guo Zou
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Shanrong Zhang
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Shishi Feng
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China.,State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, Fujian Provincial Key Lab of Theoretical and Computational Chemistry, Xiamen University, Xiamen 361005, P. R. China
| | - Qihuan Li
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
| | - Bo Yang
- College of Chemistry and Materials Science, Sichuan Normal University, 5 Jingan Road, Chengdu 610068, P. R. China
| | - Yi Zhao
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China.,State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, Fujian Provincial Key Lab of Theoretical and Computational Chemistry, Xiamen University, Xiamen 361005, P. R. China
| | - Kaijun Luo
- College of Chemistry and Materials Science, Sichuan Normal University, 5 Jingan Road, Chengdu 610068, P. R. China
| | - Ting-Bin Wen
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China
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4
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Swarbrook AM, Weekes RJ, Goodwin JW, Hawes CS. Ligand isomerism fine-tunes structure and stability in zinc complexes of fused pyrazolopyridines. Dalton Trans 2021; 51:1056-1069. [PMID: 34935828 DOI: 10.1039/d1dt04007c] [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
Fused-ring pyrazoles offer a versatile platform for derivitization to give finely tuned and functional ligands in coordination assemblies. Here, we explore the pyrazolo[4,3-b]pyridine (HL1) and pyrazolo[3,4-c]pyridine (HL2) backbones and their N-substituted derivatives, using their coordination chemistry with zinc(II) in the solid state and in solution to examine the steric and electronic effects of varying their substitution pattern. The parent heterocycles HL1 and HL2 both generate robust and permanently porous isomeric MOFs on reaction with zinc and a dicarboxylate co-ligand. The subtle geometric change offered by the position of the backbone pyridyl nitrogen atom leads to substantial changes in the pore size and total pore volume, which is reflected in both their surface areas and CO2 uptake performance. Both materials are also unusually resilient to atmospheric water vapour by virtue of the strong metal-azolate bonding. The isomeric chelating ligands L3-L6, generated by N-arylation of the parent heterocycles with a 2-pyridyl group, each coordinate to zinc to give either mononuclear or polymeric coordination compounds depending on the involvement of the backbone pyridine nitrogen atom. While crystal packing influences based on the steric preferences of the ligands are dominant in the crystalline phase, fluorescence spectroscopy is used to show that the 2H isomers L4 and L6 show distinct coordination behaviour to the 1H isomers L3 and L5, forming competing [ML] and [ML2] species in soution. The first stability constant for L6 with zinc(II) is an order of magnitude larger than for the other three ligands, suggesting an improved binding strength based on the electron configuration in this isomer. These results show that careful control of remote substitution on fused pyrazole ligands can lead to substantial improvements in the stability of the resulting complexes, with consequences for the design of stable coordination assemblies containining labile metal ions.
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Affiliation(s)
- Amelia M Swarbrook
- School of Chemical and Physical Sciences, Keele University, Keele ST5 5BG, UK.
| | - Rohan J Weekes
- School of Chemical and Physical Sciences, Keele University, Keele ST5 5BG, UK.
| | - Jack W Goodwin
- School of Chemical and Physical Sciences, Keele University, Keele ST5 5BG, UK.
| | - Chris S Hawes
- School of Chemical and Physical Sciences, Keele University, Keele ST5 5BG, UK.
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5
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Veerakanellore GB, Smith CM, Vasiliu M, Oliver AG, Dixon DA, Carrick JD. Synthesis of 1 H-Pyrazol-5-yl-pyridin-2-yl-[1,2,4]triazinyl Soft-Lewis Basic Complexants via Metal and Oxidant Free [3 + 2] Dipolar Cycloaddition of Terminal Ethynyl Pyridines with Tosylhydrazides. J Org Chem 2019; 84:14558-14570. [PMID: 31647644 DOI: 10.1021/acs.joc.9b02088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Soft-Lewis basic complexants that facilitate chemoselective separation of the minor actinides from the lanthanides are critical to the closure of the nuclear fuel cycle. Complexants that modulate covalent orbital interactions with relevant metals of interest can facilitate desired outcomes in liquid-liquid separation, allowing for further transmutative processes that decrease issues related with storage of spent nuclear fuel from energy and weapons production. Synthesis of previously unexplored scaffolds seeks to improve performance over benchmark complexants. In the current work, an intermolecular, thermally initiated, and DBU-assisted [3 + 2] cycloaddition of 3-(6-ethynyl-pyridin-2-yl)-5,6-diphenyl-[1,2,4]triazine dipolarophiles with structurally diverse 4-methylbenzenesulfono-hydrazides afforded 21 yet-to-be reported examples in 42-68% yield and modest regioselectivity for the desired regioisomer. Preparation of requisite starting materials, method definition, dipole and dipolarophile scope, ten-fold scale-up reaction, and downstream functional group interconversion are reported herein.
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Affiliation(s)
- Giri Babu Veerakanellore
- Department of Chemistry , Tennessee Technological University , Cookeville , Tennessee 38505-0001 , United States
| | - Caris M Smith
- Department of Chemistry and Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Allen G Oliver
- Department of Chemistry , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - David A Dixon
- Department of Chemistry and Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Jesse D Carrick
- Department of Chemistry , Tennessee Technological University , Cookeville , Tennessee 38505-0001 , United States
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6
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Sethi S, Jena S, Das PK, Behera N. Synthetic approach and structural diversities of pyridylpyrazole derived late transition metal complexes. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Muraoka T, Shima T, Kajitani T, Hoshino N, Morvan E, Grélard A, Dufourc EJ, Fukushima T, Akutagawa T, Nabeya K, Kinbara K. Heat-Triggered Crystallization of Liquid Crystalline Macrocycles Allowing for Conductance Switching through Hysteretic Thermal Phase Transitions. Chem Asian J 2019; 14:141-148. [PMID: 30371022 DOI: 10.1002/asia.201801372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Indexed: 11/11/2022]
Abstract
A polymesomorphic thermal phase-transition of a macrocyclic amphiphile consisting of aromatic groups and oligoethylene glycol (OEG) chains is reported. The macrocyclic amphiphile exists in a highly-ordered liquid crystal (LC) phase at room temperature. Upon heating, this macrocycle shows phase-transition from columnar-lamellar to nematic LC phases followed by crystallization before melting. Spectroscopic studies suggest that the thermally induced crystallization is triggered by a conformational change at the OEG chains. Interestingly, while the macrocycle returns to the columnar-lamellar phase after cooling from the isotropic liquid, it retains the crystallinity after cooling from the thermally-induced crystal. Thanks to this bistability, conductance switching was successfully demonstrated. A different macrocyclic amphiphile also shows an analogous phase-transition behavior, suggesting that this molecular design is universal for developing switchable and memorizable materials, by means of hysteretic phase-transition processes.
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Affiliation(s)
- Takahiro Muraoka
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.,PRESTO, Japan Science and Technology Agency, 4-1-8, Honcho, Kawaguchi, Saitama, 332-0012, Japan
| | - Tatsuya Shima
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Takashi Kajitani
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.,RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo, 679-5148, Japan
| | - Norihisa Hoshino
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Estelle Morvan
- European Institute of Chemistry and Biology, University of Bordeaux, UMS 3033, CNRS, INSERM, 2 rue Robert Escarpit, 33607, Pessac, France
| | - Axelle Grélard
- Institute of Chemistry and Biology of Membranes and Nano-objects, University of Bordeaux, UMR 5248, CNRS, Bordeaux INP, allée Geoffroy Saint Hilaire, 33600, Pessac, France
| | - Erick J Dufourc
- Institute of Chemistry and Biology of Membranes and Nano-objects, University of Bordeaux, UMR 5248, CNRS, Bordeaux INP, allée Geoffroy Saint Hilaire, 33600, Pessac, France
| | - Takanori Fukushima
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
| | - Tomoyuki Akutagawa
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan
| | - Kota Nabeya
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan
| | - Kazushi Kinbara
- Department of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8503, Japan.,Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan
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8
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9
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Trofimov BA, Schmidt EY. Acetylenes in the Superbase-Promoted Assembly of Carbocycles and Heterocycles. Acc Chem Res 2018; 51:1117-1130. [PMID: 29668261 DOI: 10.1021/acs.accounts.7b00618] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
In this Account, we briefly discuss the recently discovered and rapidly developing superbase-promoted self-organization reactions of several equivalents of acetylenes and ketones to afford complex compounds that represent promising synthetic building blocks common in natural products. Notably, acetylenes play a special role in these reactions because of their dual (acting as an electrophile and a nucleophile) and flexible reactivity. These unique properties of acetylenes are elegantly expressed in superbasic media, where acetylenes are more deprotonated and their electrophilicity increases as a result of complexation with alkali metal cations, with simultaneous enhancement of the nucleophilic reactants due to desolvation. Under these conditions, acetylenes behave as a driving and organizing force toward other reactants. Various combinations of nucleophilic addition to the triple bond and acetylene deprotonation in the presence of other reactants with dual reactivity (e.g., ketones) enables the self-organization of complex molecular architectures that are inaccessible by conventional reactions. Herein we analyze recent achievements in this area concerning the reactions of acetylenes with ketones in superbasic KOH/DMSO-type systems that selectively afford synthetically and pharmaceutically valuable carbo- and heterocycles. Most of the reactions are triggered by the nucleophilic addition of deprotonated ketones (enolate anions) to acetylenes (superbase-catalyzed C-vinylation of ketones with acetylenes, which was recently introduced by our group into a toolkit of organic chemistry). The β,γ-ethylenic ketones thus formed can then take part in cascade processes with ketones and acetylenes to afford either carbocycles (e.g., hexahydroazulenones, acyl terphenyls, functionalized and cyclopentenols) or heterocycles (e.g., furans, benzoxepines, dioxabicyclo[3.2.1]octanes, and dioxadispiro[5.1.5.2]pentadecanes), depending on the structure of the reactants and the reaction conditions. Most of these compounds are selectively built from several equivalents of ketones and acetylenes in different combinations, and despite the presence of two or more asymmetric carbons in the products, they are generated as single diastereomers. When other nucleophiles (hydroxylamine, hydrazines, guanidine, and oximes) and ketones are involved in these self-organization processes, the intermediate β,γ-ethylenic ketones allow the formation of diverse heterocyclic systems (pyrroles, isoxazolines, pyrazolines, aminopyrimidines, and azabicyclo[3.1.0]hexanes). The discovered unique chemical transformations do not require transition metal catalysts and proceed under mild and operationally simple conditions. Most of these syntheses involve cascade addition reactions and therefore represent pot-, atom-, step-, and energy-saving processes that meet the requirements of green chemistry. The significance of the approach discussed herein is that it represents a viable alternative to existing classic and modern transition-metal-based catalytic syntheses of some fundamental carbo- and heterocycles. This is demonstrated by its employment of readily available, inexpensive starting materials like acetylenes and ketones and simple, widely accessible superbasic systems such as KOH/DMSO, which serves as a highly active universal catalyst and auxiliary. As shown in this Account, as this approach has developed, the number of preparatively attractive methods for the synthesis of diverse and potentially useful compounds has rapidly ballooned. The impressive experimental results presented in this Account will hopefully draw the attention of large circles of organic chemists involved in the design of rational and ecologically sound synthetic procedures and thus increase the application of these techniques in medicinal chemistry and materials science.
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Affiliation(s)
- Boris A. Trofimov
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk 664033, Russia
| | - Elena Yu. Schmidt
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk 664033, Russia
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10
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Chakraborty S, Mondal P, Krishna Prasad S, Shankar Rao D, Bhattacharjee CR. Zinc(II)-salphen complexes bearing long alkoxy side arms: Synthesis, solvent dependent aggregation, and spacer group substituent effect on mesomorphism and photophysical property. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.09.078] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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11
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Tuning the liquid crystalline properties of palladium(II) metallomesogens: A study of rod-like to disc-like transition in cyclopalladated complexes with N-benzoyl thiourea derivatives. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.08.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Iliş M, Micutz M, Cîrcu V. Luminescent palladium(II) metallomesogens based on cyclometalated Schiff bases and N -benzoyl thiourea derivatives as co-ligands. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.03.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Ilis M, Batalu D, Pasuk I, Cîrcu V. Cyclometalated palladium(II) metallomesogens with Schiff bases and N -benzoyl thiourea derivatives as co-ligands. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.02.114] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Gülcher J, Vill R, Braumüller M, Rahimi K, de Jeu WH, Mourran A, Ziener U. Effect of Double Branching in α,ω-Substituted Oligothiophenes on Thermal Solid-State Properties. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jochen Gülcher
- Institut für Organische Chemie III; Universität Ulm; Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Roman Vill
- Institut für Organische Chemie III; Universität Ulm; Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Markus Braumüller
- Institut für Organische Chemie III; Universität Ulm; Albert-Einstein-Allee 11 89081 Ulm Germany
| | - Khosrow Rahimi
- DWI-Leibniz Institute for Interactive Materials; Forckenbeckstrasse 50 52056 Aachen Germany
| | - Wim H. de Jeu
- DWI-Leibniz Institute for Interactive Materials; Forckenbeckstrasse 50 52056 Aachen Germany
| | - Ahmed Mourran
- DWI-Leibniz Institute for Interactive Materials; Forckenbeckstrasse 50 52056 Aachen Germany
| | - Ulrich Ziener
- Institut für Organische Chemie III; Universität Ulm; Albert-Einstein-Allee 11 89081 Ulm Germany
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15
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Cuerva C, Campo JA, Cano M, Schmidt R. Nanostructured discotic Pd(ii) metallomesogens as one-dimensional proton conductors. Dalton Trans 2017; 46:96-105. [DOI: 10.1039/c6dt03521c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Bis(isoquinolinylpyrazolate) Pd(ii) metallomesogens may be a promising step forward in the design of highly-stable proton conducting water-free electrolyte materials.
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Affiliation(s)
- Cristián Cuerva
- Departamento de Química Inorgánica I
- Facultad de Ciencias Químicas
- Universidad Complutense de Madrid
- Ciudad Universitaria
- E-28040 Madrid
| | - José A. Campo
- Departamento de Química Inorgánica I
- Facultad de Ciencias Químicas
- Universidad Complutense de Madrid
- Ciudad Universitaria
- E-28040 Madrid
| | - Mercedes Cano
- Departamento de Química Inorgánica I
- Facultad de Ciencias Químicas
- Universidad Complutense de Madrid
- Ciudad Universitaria
- E-28040 Madrid
| | - Rainer Schmidt
- GFMC. Departamento de Física Aplicada III
- Universidad Complutense de Madrid
- Ciudad Universitaria
- E-28040 Madrid
- Spain
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17
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Cuerva C, Campo JA, Cano M, Sanz J, Sobrados I, Diez-Gómez V, Rivera-Calzada A, Schmidt R. Water-Free Proton Conduction in Discotic Pyridylpyrazolate-based Pt(II) and Pd(II) Metallomesogens. Inorg Chem 2016; 55:6995-7002. [PMID: 27362555 DOI: 10.1021/acs.inorgchem.6b00728] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work we report on water-free proton conductivity in liquid-crystal pyridylpyrazolate-based Pt(II) and Pd(II) complexes [M(pz(R(n,n)py))2] (pz(R(n,n)py) = 3-(3,5-dialkyloxyphenyl)-5-(pyridin-2-yl)pyrazolate, R(n,n) = C6H3(OCnH2n+1)2; n = 4, 12, 16, M = Pd; n = 12, M = Pt) with potential application as electrolyte materials in proton exchange membrane fuel cells. The columnar ordering of the complexes in the liquid-crystalline phase opens nanochannels, which are used for fast proton exchange as detected by impedance spectroscopy and NMR. The NMR spectra indicate that the proton conduction mechanism is associated with a novel C-H···N proton transfer, which persists above the clearing point of the material. The highest conductivity of ∼0.5 μS cm(-1) at 180 °C with an activation energy of 1.2 eV is found for the Pt(II) compound in the mesophase. The Pd(II) complexes with different chain length (n = 4, 12, and 16) show lower conductivity but smaller activation energies, in the range of 0.74-0.93 eV.
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Affiliation(s)
| | | | | | - Jesús Sanz
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas , E-28049 Cantoblanco Madrid, Spain
| | - Isabel Sobrados
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas , E-28049 Cantoblanco Madrid, Spain
| | - Virginia Diez-Gómez
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas , E-28049 Cantoblanco Madrid, Spain
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Cuerva C, Campo JA, Cano M, Lodeiro C. Platinum(II) Metallomesogens: New External-Stimuli-Responsive Photoluminescence Materials. Chemistry 2016; 22:10168-78. [DOI: 10.1002/chem.201601115] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Cristián Cuerva
- Departamento de Química Inorgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid, Ciudad Universitaria; 28040 Madrid Spain
| | - José A. Campo
- Departamento de Química Inorgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid, Ciudad Universitaria; 28040 Madrid Spain
| | - Mercedes Cano
- Departamento de Química Inorgánica I; Facultad de Ciencias Químicas; Universidad Complutense de Madrid, Ciudad Universitaria; 28040 Madrid Spain
| | - Carlos Lodeiro
- BIOSCOPE Research Group; UCIBIO@REQUIMTE; Chemistry Department; Faculty of Science and Technology; University NOVA of Lisbon; Caparica Campus 2829-516 Caparica Portugal
- PROTEOMASS Scientific Society; Rua dos Inventores, Madam Parque, Caparica Campus 2829-516 Caparica Portugal
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McKay AP, Lo WK, Preston D, Giles GI, Crowley JD, Barnsley JE, Gordon KC, McMorran DA. Palladium(II) and platinum(II) complexes of ((2-pyridyl)pyrazol-1-ylmethyl)benzoic acids: Synthesis, Solid state characterisation and biological cytotoxicity. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.02.038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Columnar Liquid Crystalline Self-Assembly of Hydrogen-Bonded Rod-Coil Diblock Complexes Created from Pyrazole/Benzoic acid Derivatives. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10556] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Dicatenar pyridylpyrazoles: An opportunity to induce mesomorphism. Synthesis, X-ray characterisation and DFT calculations. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.07.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wöhrle T, Wurzbach I, Kirres J, Kostidou A, Kapernaum N, Litterscheidt J, Haenle JC, Staffeld P, Baro A, Giesselmann F, Laschat S. Discotic Liquid Crystals. Chem Rev 2015; 116:1139-241. [PMID: 26483267 DOI: 10.1021/acs.chemrev.5b00190] [Citation(s) in RCA: 423] [Impact Index Per Article: 47.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tobias Wöhrle
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Iris Wurzbach
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Jochen Kirres
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Antonia Kostidou
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Nadia Kapernaum
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Juri Litterscheidt
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Johannes Christian Haenle
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Peter Staffeld
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Angelika Baro
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Frank Giesselmann
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Sabine Laschat
- Institut für Organische Chemie, and ‡Institut für Physikalische Chemie, Universität Stuttgart , Pfaffenwaldring 55, 70569 Stuttgart, Germany
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Lin KT, Lee GH, Lai CK. Mesogenic heterocycles formed by bis-pyrazoles and bis-1,3,4-oxadiazoles. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.055] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Base-catalyzed α-vinylation of ketones with acetylenes as a key step in one-pot synthesis of pyrazolines and pyrazoles. MENDELEEV COMMUNICATIONS 2015. [DOI: 10.1016/j.mencom.2015.03.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Cuerva C, Campo JA, Cano M, Arredondo B, Romero B, Otón E, Otón JM. Bis(pyridylpyrazolate)platinum(ii): a mechanochromic complex useful as a dopant for colour-tunable polymer OLEDs. NEW J CHEM 2015. [DOI: 10.1039/c5nj01875g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel metallomesogenic Pt(ii) dopant on the PFO-matrix allows induction of colour changes from bluish-green to orange-red with just 5% complex concentration.
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Affiliation(s)
- Cristián Cuerva
- Departamento de Química Inorgánica I
- Facultad de Ciencias Químicas
- Universidad Complutense de Madrid
- Ciudad Universitaria
- E-28040 Madrid
| | - José A. Campo
- Departamento de Química Inorgánica I
- Facultad de Ciencias Químicas
- Universidad Complutense de Madrid
- Ciudad Universitaria
- E-28040 Madrid
| | - Mercedes Cano
- Departamento de Química Inorgánica I
- Facultad de Ciencias Químicas
- Universidad Complutense de Madrid
- Ciudad Universitaria
- E-28040 Madrid
| | - Belén Arredondo
- Área Tecnología Electrónica
- ESCET
- Universidad Rey Juan Carlos
- Madrid
- Spain
| | - Beatriz Romero
- Área Tecnología Electrónica
- ESCET
- Universidad Rey Juan Carlos
- Madrid
- Spain
| | - Eva Otón
- CEMDATIC
- ETSI Telecomunicación
- Universidad Politécnica de Madrid
- E-28040 Madrid
- Spain
| | - José M. Otón
- CEMDATIC
- ETSI Telecomunicación
- Universidad Politécnica de Madrid
- E-28040 Madrid
- Spain
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