1
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Manandhar S, Yrjänä V, Leito I, Bobacka J. Determination of benzoate in cranberry and lingonberry by using a solid-contact benzoate-selective electrode. Talanta 2024; 274:125996. [PMID: 38574535 DOI: 10.1016/j.talanta.2024.125996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 03/15/2024] [Accepted: 03/25/2024] [Indexed: 04/06/2024]
Abstract
Benzoic acid is used as a preservative in processed food, and occasionally in cosmetics and pharmaceuticals, while benzoic acid occurs naturally in, e.g., cranberry and lingonberry. Therefore, the determination of benzoate is of interest for product quality assurance, food safety, and personal health. In this work, a solid-contact benzoate-selective electrode (benzoate-ISE) was developed by utilising poly(3,4-ethylenedioxythiophene) (PEDOT) as solid contact and a solvent polymeric membrane containing a 1,3-bis(carbazolyl)urea derivative as ionophore. The benzoate-ISE was characterised in parallel with an ionophore-free control-ISE by electrochemical impedance spectroscopy and potentiometry. The presence of the ionophore in the membrane improved the selectivity to benzoate. Benzoate-ISEs and control-ISEs were used further to determine the benzoate concentration in cranberry and lingonberry by standard addition. The results obtained with both types of ISEs were compared with those obtained by ion chromatography. The results obtained with benzoate-ISEs were consistent with those obtained with ion chromatography. On the contrary, the control-ISE (without ionophore) gave significantly higher benzoate concentrations, especially in the case of cranberry where the benzoate concentration was low (ca 0.2 g kg-1) compared to lingonberry (ca 1 g kg-1). Hence, the benzoate-selectivity of the ionophore was crucial to obtain a benzoate-ISE that was practically applicable for determination of benzoate concentrations in cranberry and lingonberry.
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Affiliation(s)
- Sajana Manandhar
- Laboratory of Molecular Science and Engineering, Johan Gadolin Process Chemistry Centre, Faculty of Science and Engineering, Åbo Akademi University, Henriksgatan 2, FI-20500, Turku, (Åbo), Finland; Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Ville Yrjänä
- Laboratory of Molecular Science and Engineering, Johan Gadolin Process Chemistry Centre, Faculty of Science and Engineering, Åbo Akademi University, Henriksgatan 2, FI-20500, Turku, (Åbo), Finland
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Johan Bobacka
- Laboratory of Molecular Science and Engineering, Johan Gadolin Process Chemistry Centre, Faculty of Science and Engineering, Åbo Akademi University, Henriksgatan 2, FI-20500, Turku, (Åbo), Finland.
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2
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Rüütel A, Tshepelevitsh S, Leito I. One Hundred Carboxylate Receptors. J Org Chem 2022; 87:14186-14193. [PMID: 36214741 DOI: 10.1021/acs.joc.2c01725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
This work presents a compilation of binding constant (logKass) values in DMSO-d6/H2O (0.5% m/m) for a variety of receptors with 12 carboxylate anions (formate, acetate, lactate, pivalate, sorbate, hexanoate, benzoate, glyphosate, glucuronate, ibuprofen, naproxen, and ketoprofen). A total of 489 logKass values are listed for 100 anion receptor molecules. Most logKass values originate from previously published articles, along with some values for previously unpublished receptor molecules, spanning a workflow of 8 years. The purpose of this study is to serve as a comprehensive information source for selecting suitable receptor candidates to be used in practical carboxylate sensing applications, such as constructing ion-selective electrodes (ISE-s). To support such decision making, all receptors are presented together with lipophilicity (logPo/w) data.
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Affiliation(s)
- Alo Rüütel
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411Tartu, Estonia
| | - Sofja Tshepelevitsh
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411Tartu, Estonia
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411Tartu, Estonia
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3
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Nikitin K, Vetter AC, Müller-Bunz H, Muldoon J. Quaternary Phosphonium Carboxylates: Structure, Dynamics and Intriguing Olefination Mechanism. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/s-0037-1610788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractWe have earlier shown how the Wittig chemistry can be done using novel Eigenbase phosphonium carboxylate reagents. Here we discuss the phenomenon of ion pairing, their solution tautomerism, solid-state structure, and mechanistic aspects of olefination. The results point to a complex process involving unfamiliar H-bond-driven ion-pair equilibria followed by standard Wittig reaction steps.
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Affiliation(s)
| | - Anna C. Vetter
- Department of Chemical Biology, Helmholtz Centre for Infection Research
- School of Chemistry, University College Dublin
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4
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Niedbała P, Ceborska M, Mehmet M, Ignacak W, Jurczak J, Dąbrowa K. Anion Recognition by a Pincer-Type Host Constructed from Two Polyamide Macrocyclic Frameworks Jointed by a Photo-Addressable Azobenzene Switch. MATERIALS (BASEL, SWITZERLAND) 2022; 15:692. [PMID: 35057408 PMCID: PMC8777895 DOI: 10.3390/ma15020692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 01/04/2022] [Accepted: 01/10/2022] [Indexed: 12/10/2022]
Abstract
A sterically crowded light-responsive host 1 was synthetized with a 93% yield by applying a post-functionalization protocol utilizing the double amidation of 4,4'-azodibenzoyl dichloride with a readily available 26-membered macrocyclic amine. X-ray structures of two hydrates of trans-1 demonstrate a very different alignment of the azobenzene linkage, which is involved in T-shape or parallel-displaced π⋯π stacking interactions with the pyridine-2,6-dicarboxamide moieties from the macrocyclic backbone. Despite the rigidity of the macrocyclic framework, which generates a large steric hindrance around the azobenzene chromophore, the host 1 retains the ability to undergo a reversible cis⟷trans isomerization upon irradiation with UVA (368 nm) and blue (410 nm) light. Moreover, thermal cis→trans back-isomerization (ΔG0 = 106.5 kJ∙mol-1, t½ = 141 h) is markedly slowed down as compared to the non-macrocyclic analog. 1H NMR titration experiments in DMSO-d6/0.5% water solution reveal that trans-1 exhibits a strong preference for dihydrogenphosphate (H2PO4-) over other anions (Cl-, MeCO2-, and PhCO2-), whereas the photogenerated metastable cis-1 shows lower affinity for the H2PO4- anion.
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Affiliation(s)
- Patryk Niedbała
- Institute of Organic Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland; (P.N.); (M.M.); (W.I.)
| | - Magdalena Ceborska
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland;
| | - Mart Mehmet
- Institute of Organic Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland; (P.N.); (M.M.); (W.I.)
| | - Wiktor Ignacak
- Institute of Organic Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland; (P.N.); (M.M.); (W.I.)
| | - Janusz Jurczak
- Institute of Organic Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland; (P.N.); (M.M.); (W.I.)
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland; (P.N.); (M.M.); (W.I.)
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5
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Kheirjou S, Rüütel A, Darnell A, Haljasorg T, Leito I. Macrocyclic versus open-chain carbazole receptors for carboxylate binding. Org Biomol Chem 2022; 20:2121-2130. [DOI: 10.1039/d1ob02398e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Anion recognition properties of six synthetic acyclic and macrocyclic carbazole-based receptors have been studied by 1H-NMR as well as with COSMO-RS calculations towards acetate, benzoate, lactate, sorbate and formate. The...
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6
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Affiliation(s)
- Patrick Wang
- School of Chemistry, The University of Sydney, NSW, Australia
| | - Xin Wu
- School of Chemistry, The University of Sydney, NSW, Australia
| | - Philip A. Gale
- School of Chemistry, The University of Sydney, NSW, Australia
- The University of Sydney Nano Institute (SydneyNano), The University of Sydney, NSW, Australia
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7
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Maslowska-Jarzyna K, Korczak ML, Wagner JA, Chmielewski MJ. Carbazole-Based Colorimetric Anion Sensors. Molecules 2021; 26:3205. [PMID: 34071969 PMCID: PMC8199442 DOI: 10.3390/molecules26113205] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/18/2021] [Accepted: 05/24/2021] [Indexed: 12/02/2022] Open
Abstract
Owing to their strong carbazole chromophore and fluorophore, as well as to their powerful and convergent hydrogen bond donors, 1,8-diaminocarbazoles are amongst the most attractive and synthetically versatile building blocks for the construction of anion receptors, sensors, and transporters. Aiming to develop carbazole-based colorimetric anion sensors, herein we describe the synthesis of 1,8-diaminocarbazoles substituted with strongly electron-withdrawing substituents, i.e., 3,6-dicyano and 3,6-dinitro. Both of these precursors were subsequently converted into model diamide receptors. Anion binding studies revealed that the new receptors exhibited significantly enhanced anion affinities, but also significantly increased acidities. We also found that rear substitution of 1,8-diamidocarbazole with two nitro groups shifted its absorption spectrum into the visible region and converted the receptor into a colorimetric anion sensor. The new sensor displayed vivid color and fluorescence changes upon addition of basic anions in wet dimethyl sulfoxide, but it was poorly selective; because of its enhanced acidity, the dominant receptor-anion interaction for most anions was proton transfer and, accordingly, similar changes in color were observed for all basic anions. The highly acidic and strongly binding receptors developed in this study may be applicable in organocatalysis or in pH-switchable anion transport through lipophilic membranes.
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Affiliation(s)
| | | | | | - Michał J. Chmielewski
- Biological and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland; (K.M.-J.); (M.L.K.); (J.A.W.)
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8
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Vetter AC, Gilheany DG, Nikitin K. Wittig Olefination Using Phosphonium Ion-Pair Reagents Incorporating an Endogenous Base. Org Lett 2021; 23:1457-1462. [PMID: 33529039 DOI: 10.1021/acs.orglett.1c00133] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Despite common perception, the use of strong bases in Wittig chemistry is utterly unnecessary: we report a series of novel ion-pair phosphonium carboxylate reagents which are essentially "storable ylides". These reagents are straightforwardly prepared in excellent yields, and their fluxional nature permits clean olefination of a broad range of aldehydes and even hemiacetals.
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Affiliation(s)
- Anna C Vetter
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Declan G Gilheany
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Kirill Nikitin
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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9
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Potentiometric Carboxylate Sensors Based on Carbazole-Derived Acyclic and Macrocyclic Ionophores. CHEMOSENSORS 2020. [DOI: 10.3390/chemosensors9010004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Solid-contact ion-selective electrodes with carbazole-derived ionophores were prepared. They were characterized as acetate sensors, but can be used to determine a number of carboxylates. The potentiometric response characteristics (slope, detection limit, selectivity, and pH sensitivity) of sensors prepared with different membrane compositions (ionophore, ionophore concentration, anion exchanger concentration, and plasticizer) were evaluated. The results show that for the macrocyclic ionophores, a larger cavity provided better selectivity. The sensors exhibited modest selectivity for acetate but good selectivity for benzoate. The carbazole-derived ionophores effectively decreased the interference from lipophilic anions, such as bromide, nitrate, iodide, and thiocyanate. The selectivity, detection limit, and linear range were improved by choosing a suitable plasticizer and by reducing the ionophore and anion exchanger concentrations. The influence of the electrode body’s material upon the composition of the plasticized poly(vinyl chloride) membrane, and thus also upon the sensor characteristics, was also studied. The choice of materials for the electrode body significantly affected the characteristics of the sensors.
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10
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Rüütel A, Yrjänä V, Kadam SA, Saar I, Ilisson M, Darnell A, Haav K, Haljasorg T, Toom L, Bobacka J, Leito I. Design, synthesis and application of carbazole macrocycles in anion sensors. Beilstein J Org Chem 2020; 16:1901-1914. [PMID: 32802207 PMCID: PMC7418101 DOI: 10.3762/bjoc.16.157] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 07/16/2020] [Indexed: 11/23/2022] Open
Abstract
Carboxylate sensing solid-contact ion-selective electrodes (ISEs) were created to provide a proof-of-concept ISE development process covering all aspects from in silico ionophore design to functional sensor characterization. The biscarbazolylurea moiety was used to synthesize methylene-bridged macrocycles of different ring size aiming to fine tune selectivity towards different carboxylates. Cyclization was achieved with two separate strategies, using either amide synthesis to access up to –[CH2]10– macrocycles or acyl halides to access up to –[CH2]14– macrocycles. Seventy-five receptor–anion complexes were modelled and studied with COSMO-RS, in addition to all free host molecules. In order to predict initial selectivity towards carboxylates, 1H NMR relative titrations were used to quantify binding in DMSO-d6/H2O solvent systems of two proportions – 99.5%:0.5% m/m and 90.0%:10.0% m/m, suggesting initial selectivity towards acetate. Three ionophores were selected for successful sensor prototype development and characterization. The constructed ion-selective electrodes showed higher selectivity towards benzoate than acetate, i.e., the selectivity patterns of the final sensors deviated from that predicted by the classic titration experiments. While the binding constants obtained by NMR titration in DMSO-d6/H2O solvent systems provided important guidance for sensor development, the results obtained in this work emphasize the importance of evaluating the binding behavior of receptors in real sensor membranes.
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Affiliation(s)
- Alo Rüütel
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Ville Yrjänä
- Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Turku/Åbo, Finland
| | - Sandip A Kadam
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Indrek Saar
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Mihkel Ilisson
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Astrid Darnell
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Kristjan Haav
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Tõiv Haljasorg
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Lauri Toom
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
| | - Johan Bobacka
- Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Engineering, Åbo Akademi University, Biskopsgatan 8, FI-20500 Turku/Åbo, Finland
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia, https://analytical.chem.ut.ee
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11
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Tshepelevitsh S, Kadam SA, Darnell A, Bobacka J, Rüütel A, Haljasorg T, Leito I. LogP determination for highly lipophilic hydrogen-bonding anion receptor molecules. Anal Chim Acta 2020; 1132:123-133. [PMID: 32980103 DOI: 10.1016/j.aca.2020.07.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 07/10/2020] [Accepted: 07/13/2020] [Indexed: 01/31/2023]
Abstract
Lipophilicity, usually expressed as octanol-water partition coefficient (logPo/w), is an important property in biomedical research, drug design and technology. However, high logPo/w values of complex hydrogen-bonding molecules are not easy to measure or calculate. Exemplary problematic molecules are prospective active components (ionophores) of polymeric sensor membranes - the working elements of ion-selective electrodes. High lipophilicities of the membrane components are crucial for the sensor lifetime. In this work, lipophilicities of a wide range of urea-, carbazole- and indolocarbazole-based anion receptor molecules (some newly synthesized) and two common plasticizers were determined using a chromatography-based approach and/or the COSMO-RS method. Very high logPo/w values, up to around 20, i.e. far beyond directly experimentally accessible range, were obtained. The agreement between the two approaches ranged from very good to satisfactory. Based on these results, simple fragment-based equations were developed for quick lipophilicity estimation without any specialized software. Membrane-water partition coefficients for the studied compounds were modeled. Limitations and biases of the used methods are discussed.
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Affiliation(s)
- Sofja Tshepelevitsh
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Sandip A Kadam
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Astrid Darnell
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Johan Bobacka
- Åbo Akademi University, Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Engineering, Biskopsgatan 8, FI-20500, Turku/Åbo, Finland
| | - Alo Rüütel
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Tõiv Haljasorg
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411, Tartu, Estonia.
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12
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Pramudita RA, Manaka Y, Motokura K. A Resin-Supported Formate Catalyst for the Transformative Reduction of Carbon Dioxide with Hydrosilanes. Chemistry 2020; 26:7937-7945. [PMID: 32315104 DOI: 10.1002/chem.202001605] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 04/16/2020] [Indexed: 01/03/2023]
Abstract
A heterogeneous formate anion catalyst for the transformative reduction of carbon dioxide (CO2 ) based on a polystyrene and divinylbenzene copolymer modified with alkylammonium formate was prepared from a widely available anion exchange resin. The catalyst preparation was easy and the characterization was carried out by using elemental analysis, Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and solid-state 13 C cross-polarization/magic-angle spinning nuclear magnetic resonance (13 C CP/MAS NMR) spectroscopy. The catalyst displayed good catalytic activity for the direct reduction of CO2 with hydrosilanes, tunably yielding silylformate or methoxysilane products depending on the hydrosilanes used. The catalyst was also active for the reductive insertion of CO2 into both primary and secondary amines. The catalytic activity of the resin-supported formate can be predicted from the FTIR spectra of the catalyst, probably because of the difference in the ionic interaction strength between the supported alkylammonium cations and formate anions. The ion pair density is thought to influence the catalytic activity, as shown by the elemental and solid-state 13 C NMR analyses.
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Affiliation(s)
- Ria Ayu Pramudita
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8502, Japan
| | - Yuichi Manaka
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8502, Japan.,Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology, 2-2-9 Machiikedai, Koriyama, Fukushima, 963-0298, Japan
| | - Ken Motokura
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, 226-8502, Japan.,PRESTO, Japan Science and Technology Agency (JST), Saitama, 332-0012, Japan
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13
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Niedbała P, Majdecki M, Dąbrowa K, Jurczak J. Selective Carboxylate Recognition Using Urea-Functionalized Unclosed Cryptands: Mild Synthesis and Complexation Studies. J Org Chem 2020; 85:5058-5064. [PMID: 32142280 PMCID: PMC7497646 DOI: 10.1021/acs.joc.9b03082] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
![]()
Herein we present
the synthesis and evaluation of anion-binding
properties of 12 new receptors from the unclosed cryptand family.
Their core is built on the stable 26-membered tetraamidic macrocyclic
scaffold, whereas various alkyl and aryl urea substituents were introduced
after a yield-limiting macrocyclization step (65–98%). The
receptors strongly bind anions, in particular carboxylates, even in
a highly competitive solvent mixture (DMSO-d6 + H2O 95:5 v/v).
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Affiliation(s)
- Patryk Niedbała
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Maciej Majdecki
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Kajetan Dąbrowa
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Janusz Jurczak
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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14
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Ketoprofen-Based Ionic Liquids: Synthesis and Interactions with Bovine Serum Albumin. Molecules 2019; 25:molecules25010090. [PMID: 31881750 PMCID: PMC6983093 DOI: 10.3390/molecules25010090] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 12/19/2019] [Accepted: 12/23/2019] [Indexed: 02/03/2023] Open
Abstract
The development of ionic liquids based on active pharmaceutical ingredients (API-ILs) is a possible solution to some of the problems of solid and/or hydrophobic drugs such as low solubility and bioavailability, polymorphism and an alternative route of administration could be suggested as compared to the classical drug. Here, we report for the first time the synthesis and detailed characterization of a series of ILs containing a cation amino acid esters and anion ketoprofen (KETO-ILs). The affinity and the binding mode of the KETO-ILs to bovine serum albumin (BSA) were assessed using fluorescence spectroscopy. All compounds bind in a distance not longer than 6.14 nm to the BSA fluorophores. The estimated binding constants (KA) are in order of 105 L mol−1, which is indicative of strong drug or IL-BSA interactions. With respect to the ketoprofen-BSA system, a stronger affinity of the ILs containing l-LeuOEt, l-ValOBu, and l-ValOEt cation towards BSA is clearly seen. Fourier transformed infrared spectroscopy experiments have shown that all studied compounds induced a rearrangement of the protein molecule upon binding, which is consistent with the suggested static mechanism of BSA fluorescence quenching and formation of complexes between BSA and the drugs. All tested compounds were safe for macrophages.
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15
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Pramudita RA, Nakagawa C, Manaka Y, Motokura K. Silica-supported Alkylammonium Formate Catalyst for Hydrosilylation of Carbon Dioxide. CHEM LETT 2019. [DOI: 10.1246/cl.190649] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ria Ayu Pramudita
- Department of Chemical Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
| | - Chihiro Nakagawa
- Department of Chemical Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
| | - Yuichi Manaka
- Department of Chemical Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
- Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology, 2-2-9 Machiikedai, Koriyama, Fukushima 963-0298, Japan
| | - Ken Motokura
- Department of Chemical Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8502, Japan
- PRESTO, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
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16
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Martin K, Kadam SA, Mattinen U, Bobacka J, Leito I. Solid‐contact Acetate‐selective Electrode Based on a 1,3‐bis(carbazolyl)urea‐ionophore. ELECTROANAL 2019. [DOI: 10.1002/elan.201800790] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kerli Martin
- University of TartuInstitute of Chemistry Ravila 14a Tartu 50411 Estonia
| | - Sandip A. Kadam
- University of TartuInstitute of Chemistry Ravila 14a Tartu 50411 Estonia
| | - Ulriika Mattinen
- Åbo Akademi UniversityJohan Gadolin Process Chemistry CentreLaboratory of Analytical Chemistry Biskopsgatan 8 FI-20500 Turku/Åbo Finland
| | - Johan Bobacka
- Åbo Akademi UniversityJohan Gadolin Process Chemistry CentreLaboratory of Analytical Chemistry Biskopsgatan 8 FI-20500 Turku/Åbo Finland
| | - Ivo Leito
- University of TartuInstitute of Chemistry Ravila 14a Tartu 50411 Estonia
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