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Takahashi A, Yamanishi M, Kameyama A. Lewis Adduct-Dissociating Hydrolysis of Boratrane for Water-Triggered Dehydration of Copolymers with a Hydrophobic Moiety. ACS Macro Lett 2022; 11:766-771. [PMID: 35622979 DOI: 10.1021/acsmacrolett.2c00161] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
As a new example of intrinsically water-triggered phenomena, we report underwater dehydration of the statistical copolymers synthesized from triethanolamine borate (TEAB) methacrylate and styrene (St) induced by the hydrolysis of the pendant TEAB group. TEAB possesses high polarity owing to its internal Lewis adduct structure, which is lost by hydrolysis to triethanolamine (TEA) with a lower dipole moment. Therefore, the hydration of the copolymers became unfavorable through the hydrolysis of the pendant TEAB to TEA, despite polyol formation, and through a hydrophobic interaction based on St moieties becoming alternatively dominant. The dehydration behavior of the copolymers, along with the hydrolysis of the pendant TEAB group, was systematically investigated. The water solubility of the copolymers was found to be dependent on the gradient of the hydrolysis equilibrium of TEAB on the side chains and was the lowest for the TEA state. These findings offer a novel concept toward designing water-responsive materials.
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Affiliation(s)
- Akira Takahashi
- Department of Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Yokohama, Kanagawa 221-8686, Japan
| | - Masahiro Yamanishi
- Department of Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Yokohama, Kanagawa 221-8686, Japan
| | - Atsushi Kameyama
- Department of Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Yokohama, Kanagawa 221-8686, Japan
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2
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Rajendiran V, El Rassi Z. Reversed-phase capillary electrochromatography of pre-column derivatized mono- and oligosaccharides with three different ultraviolet absorbing tags. J Chromatogr A 2022; 1671:463025. [PMID: 35421735 DOI: 10.1016/j.chroma.2022.463025] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/27/2022] [Accepted: 04/03/2022] [Indexed: 10/18/2022]
Abstract
In this research report, an in house developed octadecyl monolithic (ODM) column has been exploited in the reversed-phase capillary electrochromatography (RP-CEC) of precolumn derivatized mono- and oligosaccharides with three different tagging agents, namely 1-naphthylamine (1-NA), 2-aminoanthracene (2-AA) and 3-amino-2,7-naphthalenedisulfonic acid (ANDSA). These three derivatizing agents, which differed in their charges, nonpolar characters and optical absorption properties, led to different RP-CEC elution patterns and UV detection signals. In fact, the limit of detection of the derivatized sugars were 50 µM for the ANDSA- and 1-NA-sugar derivatives and 35 µM for the 2-AA-sugar derivatives due to the presence of three fused aromatic rings in 2-AA versus 2 fused rings in the 1-NA and ANDSA tags. Furthermore, while the longer ANDSA-oligosaccharides eluted later than the shorter ones and the ANDSA-monosaccharides, 1-NA- and 2-AA-sugar derivatives necessitated the presence of borate ions at alkaline pH in the mobile phase to form in situ charged derivatives to facilitate their separation by RP-CEC, and the elution order was the reversal of that observed with the ANDSA-sugar derivatives; that is the mono- eluted later than the larger size oligosaccharides. In addition, plots of log tR vs. number of glucose residues (nGlc) for derivatized glucose and maltooligosaccharides yielded straight lines with slopes representing log η where η is the retention time modulus (i.e., ratio of retention time of two neighboring derivatives differing in one glucosyl residue). In the case of 1-NA and 2-AA derivatives, η was smaller than unity while it was greater than unity in the case of ANDSA-sugar derivatives because the elution occurred in the order of decreasing size of the homologous sugar derivatives in the former than in the later derivatives. The prepared ODM column was stable for more than a month of continuous use, a fact that allowed a good repeatability for intraday and interday analyzes.
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Affiliation(s)
- Vaithilingam Rajendiran
- Department of Chemistry, Oklahoma State University, Stillwater, OK 74078-3071, United States
| | - Z El Rassi
- Department of Chemistry, Oklahoma State University, Stillwater, OK 74078-3071, United States.
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Chitosan-based hydrogel crosslinked through an aza-Michael addition catalyzed by boric acid. Int J Biol Macromol 2021; 193:1032-1042. [PMID: 34800516 DOI: 10.1016/j.ijbiomac.2021.11.075] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/13/2021] [Accepted: 11/12/2021] [Indexed: 02/05/2023]
Abstract
Polysaccharide-based hydrogels are particularly attractive materials for biomedical applications. However, their use is restricted due to their brittleness and poor mechanical properties. Here, to overcome such limitations, we report an original, green, simple, and efficient strategy to synthesize a polysaccharide-based hydrogel of chitosan (Cht) and a vinyl-functionalized PVA (PVA-MA), a non-toxic synthetic polymer that is widely known to improve the mechanical properties and stability of materials containing polysaccharides. The hydrogel was crosslinked through an aza-Michael addition among the amino groups of Cht with the vinyl moieties of PVA-MA catalyzed by boric acid (B(OH)3), an eco-friendly inorganic compound. Characterization analyses revealed that the prepared hydrogel has a porous-like morphology, an outstanding liquid uptake capacity (>665%), and improved stability in a physiological fluid for long periods. In summary, this original and simple strategy showed to be efficient in the synthesis of hydrogels with attractive properties for the biomedical field application.
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Takahashi A, Yamanishi M, Kameyama A. Synthesis of Boratrane-pendant Random Copolymers by Side-chain Modification. CHEM LETT 2021. [DOI: 10.1246/cl.210502] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Akira Takahashi
- Department of Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Yokohama, Kanagawa 221-8686, Japan
| | - Masahiro Yamanishi
- Department of Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Yokohama, Kanagawa 221-8686, Japan
| | - Atsushi Kameyama
- Department of Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Yokohama, Kanagawa 221-8686, Japan
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Dolnik V. Borate‐containing background electrolytes to improve CE separation in bare capillaries. Electrophoresis 2020; 41:1073-1080. [DOI: 10.1002/elps.201900470] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 03/13/2020] [Accepted: 03/16/2020] [Indexed: 11/08/2022]
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Walker TL, Taschner IS, Chandra M S, Taschner MJ, Engle JT, Schrage BR, Ziegler CJ, Gao X, Wheeler SE. Lone-Pair-Induced Topicity Observed in Macrobicyclic Tetra-thia Lactams and Cryptands: Synthesis, Spectral Identification, and Computational Assessment. J Org Chem 2018; 83:10025-10036. [PMID: 30067366 DOI: 10.1021/acs.joc.8b01382] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The synthesis of a rigid macrobicyclic N,S lactam L1 and a topologically favored in/in N,S cryptand L2 are reported with X-ray structure analysis, dynamic correlation NMR spectroscopy, and computational analysis. Lactam L1 exhibits two distinct rotameric conformations (plus their enantiomeric counterparts) at 25 °C, as confirmed via NMR spectroscopy and computational analysis. Coalescence of the resonances of L1 was observed at 115 °C, allowing for complete nuclei to frequency correlation. Combining computational investigations with experimental data, topological equilibria and relative energies/strain relating to the perturbation of the pore were determined. Due to the increased conformational strain of the N2S2 template, the nitrogen lone pairs in L2 elicit a unique transannular interaction, resulting in a thermodynamically favored in/in nephroidal racemate. The combination of preferred topology, steric relief, and electronic localization of L2 induces a chiral environment imparted through the amine with a computed inversion barrier of 10.3 kcal mol-1.
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Affiliation(s)
- Tia L Walker
- Department of Chemistry , Indiana University Northwest , Gary , Indiana 46408 , United States
| | - Ian S Taschner
- Department of Chemistry , Indiana University Northwest , Gary , Indiana 46408 , United States
| | - Sharath Chandra M
- Department of Chemistry , Texas A&M University , College Station , Texas 77842 , United States
| | - Michael J Taschner
- Department of Chemistry , The University of Akron , Akron , Ohio 44325 , United States
| | - James T Engle
- Department of Chemistry , The University of Akron , Akron , Ohio 44325 , United States
| | - Briana R Schrage
- Department of Chemistry , The University of Akron , Akron , Ohio 44325 , United States
| | - Christopher J Ziegler
- Department of Chemistry , The University of Akron , Akron , Ohio 44325 , United States
| | - Xinfeng Gao
- Department of Chemistry , Indiana University Bloomington , Bloomington , Indiana 47405 , United States
| | - Steven E Wheeler
- Department of Chemistry , Texas A&M University , College Station , Texas 77842 , United States.,Center for Computational Quantum Chemistry, Department of Chemistry , University of Georgia , Athens , Georgia 30602 , United States
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Ranoux A, Djanashvili K, Arends IWCE, Hanefeld U. B-TUD-1: a versatile mesoporous catalyst. RSC Adv 2013. [DOI: 10.1039/c3ra44406f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Huang M, Kireenko MM, Zaitsev KV, Oprunenko YF, Churakov AV, Howard JA, Zabalov MV, Lermontova EK, Sundermeyer J, Linder T, Karlov SS, Zaitseva GS. Stabilized germylenes based on dialkanolamines: Synthesis, structure, chemical properties. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.01.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Hammami O, Dhouibi L, Berçot P, Rezrazi EM, Triki E. Effect of diethanolamine and triethanolamine on the properties of electroplated Zn-Ni alloy coatings from acid bath. CAN J CHEM ENG 2012. [DOI: 10.1002/cjce.21627] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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10
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Synthesis and structures of new 1,3,6,2-dioxazaborocanes containing substituents in the ocane fragment. Russ Chem Bull 2009. [DOI: 10.1007/s11172-008-0259-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Zaitsev KV, Karlov SS, Selina AA, Oprunenko YF, Churakov AV, Neumüller B, Howard JAK, Zaitseva GS. Titanium Complexes of Dialkanolamine Ligands: Synthesis and Structure. Eur J Inorg Chem 2006. [DOI: 10.1002/ejic.200501154] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Matsuo H, Miyazaki Y, Takemura H, Matsuoka S, Sakashita H, Yoshimura K. 11B NMR study on the interaction of boric acid with Azomethine H. Polyhedron 2004. [DOI: 10.1016/j.poly.2003.12.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Qi T, Sonoda A, Makita Y, Kanoh H, Ooi K, Hirotsu T. Porous properties of poly(glycidyl methacrylate-co-trimethylolpropane trimethacrylate) resins synthesized by suspension polymerization. J Appl Polym Sci 2002. [DOI: 10.1002/app.10218] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Qi T, Sonoda A, Makita Y, Kanoh H, Ooi K, Hirotsu T. Synthesis and Borate Uptake of Two Novel Chelating Resins. Ind Eng Chem Res 2001. [DOI: 10.1021/ie0104417] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tao Qi
- National Institute of Advanced Industrial Science and Technology, 2217-14 Hayashi-cho, Takamatsu 761-0395, Japan
| | - Akinari Sonoda
- National Institute of Advanced Industrial Science and Technology, 2217-14 Hayashi-cho, Takamatsu 761-0395, Japan
| | - Yoji Makita
- National Institute of Advanced Industrial Science and Technology, 2217-14 Hayashi-cho, Takamatsu 761-0395, Japan
| | - Hirofumi Kanoh
- National Institute of Advanced Industrial Science and Technology, 2217-14 Hayashi-cho, Takamatsu 761-0395, Japan
| | - Kenta Ooi
- National Institute of Advanced Industrial Science and Technology, 2217-14 Hayashi-cho, Takamatsu 761-0395, Japan
| | - Takahiro Hirotsu
- National Institute of Advanced Industrial Science and Technology, 2217-14 Hayashi-cho, Takamatsu 761-0395, Japan
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Sonoda A, Makita Y, Ooi K, Takagi N, Hirotsu T. pH-Dependence of the Fractionation of Boron Isotopes withN-Methyl-D-Glucamine Resin in Aqueous Solution Systems. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2000. [DOI: 10.1246/bcsj.73.1131] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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16
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Hirotsu T, Sonoda A, Makita Y, Kanoh H, Takagi N, Ooi K, Seno M. Fractionation of Boron Isotopes to Bis(2-hydroxyalkyl)amine Borate and Boric Acid in Aqueous Solutions. CHEM LETT 1999. [DOI: 10.1246/cl.1999.1153] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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17
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Haight AR, Stuk TL, Allen MS, Bhagavatula L, Fitzgerald M, Hannick SM, Kerdesky FAJ, Menzia JA, Parekh SI, Robbins TA, Scarpetti D, Tien JHJ. Reduction of an Enaminone: Synthesis of the Diamino Alcohol Core of Ritonavir. Org Process Res Dev 1999. [DOI: 10.1021/op9802071] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anthony R. Haight
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
| | - Timothy L. Stuk
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
| | - Michael S. Allen
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
| | - Lakshmi Bhagavatula
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
| | - Michael Fitzgerald
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
| | - Steven M. Hannick
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
| | - Francis A. J. Kerdesky
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
| | - Jerome A. Menzia
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
| | - Shyamal I. Parekh
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
| | - Timothy A. Robbins
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
| | - David Scarpetti
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
| | - Jien-Heh J. Tien
- Chemical Process Research, D54P, and Process Research, D45L, Abbott Laboratories, 1401 Sheridan Road, North Chicago, Illinois 60064
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