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Cu(I) mediated hydrogen borrowing strategy for the α-alkylation of aryl ketones with aryl alcohols. MONATSHEFTE FUR CHEMIE 2021. [DOI: 10.1007/s00706-021-02735-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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2
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do N Ferreira CR, de L Ramos EL, Araujo LFS, da S Sousa LM, Feitosa JPA, Cunha AF, Oliveira MB, Mano JF, da S Maciel J. Synthesis and characterization of scaffolds produced under mild conditions based on oxidized cashew gums and carboxyethyl chitosan. Int J Biol Macromol 2021; 176:26-36. [PMID: 33529634 DOI: 10.1016/j.ijbiomac.2021.01.178] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 12/01/2020] [Accepted: 01/27/2021] [Indexed: 12/22/2022]
Abstract
This study describes the development of scaffolds based on carboxyethyl chitosan (CEC) and different oxidized cashew gums (CGOx) for tissue engineering (TE) applications. After the physico-chemical characterizations of CEC and CGOx (oxidation degree of 20, 35 and 50%), these macromolecules were used for producing the CGOx-CEC hydrogels through a Schiff base reaction, in the absence of any crosslinking agent. The CGOx-CEC scaffolds obtained after a freeze-drying process were characterized for their morphology, mechanical properties, swelling ability, degradation, and porosity. Those revealed to be highly porous (25-65%), and showed a stable swelling behavior, as well as degradation properties in the absence of enzymes. The use of the cashew gum with higher degree of oxidation led to scaffolds with higher crosslinking densities and increased compressive modulus. None of the hydrogels show cytotoxicity during the 14 days of incubation. Considering all the properties mentioned, these scaffolds are excellent candidates for soft tissue regeneration, owing to the use of eco-friendly starting materials and the easy tuning of their properties.
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Affiliation(s)
- Carlos Rhamon do N Ferreira
- Department of Organic and Inorganic Chemistry, Polymer Laboratory, Federal University of Ceará, 60440-900 Fortaleza, Brazil
| | - Everton Lucas de L Ramos
- Department of Organic and Inorganic Chemistry, Polymer Laboratory, Federal University of Ceará, 60440-900 Fortaleza, Brazil
| | - Luis Felipe S Araujo
- Department of Organic and Inorganic Chemistry, Polymer Laboratory, Federal University of Ceará, 60440-900 Fortaleza, Brazil
| | - Leonira Morais da S Sousa
- Department of Organic and Inorganic Chemistry, Polymer Laboratory, Federal University of Ceará, 60440-900 Fortaleza, Brazil
| | - Judith Pessoa A Feitosa
- Department of Organic and Inorganic Chemistry, Polymer Laboratory, Federal University of Ceará, 60440-900 Fortaleza, Brazil
| | - Ana Filipa Cunha
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mariana B Oliveira
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - João F Mano
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Jeanny da S Maciel
- Department of Organic and Inorganic Chemistry, Polymer Laboratory, Federal University of Ceará, 60440-900 Fortaleza, Brazil.
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Fatima T, Imtiaz-ud-Din, Rauf MK, Anwar MS, Raheel A, Tahir MN, Ashfaq M. Synthesis, characterization and magnetic studies for a series of compounds having a trinuclear bimetallic Cu2(II)/Ln(III) system. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114605] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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4
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Yan X, Zhong S, Zhang H. The crystal structure of ( E)- N′-(1-(3-chloro-4-fluorophenyl) ethylidene)-2-hydroxybenzohydrazide, C 15H 12ClFN 2O 2. Z KRIST-NEW CRYST ST 2020. [DOI: 10.1515/ncrs-2019-0571] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C15H12ClFN2O2, monoclinic, P21/c (no. 14), a = 13.9210(13) Å, b = 13.2329(15) Å, c = 18.7191(19) Å, β = 126.250(2)°, V = 2780.9(5) Å3, Z = 8, R
gt(F) = 0.0499, wR
ref(F
2) = 0.1420, T = 293(2) K.
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Affiliation(s)
- Xifeng Yan
- East China University of Technology, School of Water Resources and Enviromental Engineering , 330013 Nanchang, Jiangxi , P.R. China
| | - Shibin Zhong
- Jiangxi University of Science and Technology, School of Architectural and Surverying and Mapping Engineering , 341000 Ganzhou, Jiangxi , P.R. China
- Jiangxi Provincial Archives of Natural Resources , 330025 Nanchang, Jiangxi , P.R. China
| | - Hong Zhang
- East China 263 Engineering Survey Institute of Nuclear Industry , 343100 Ji’an, Jiangxi , P.R. China
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Abstract
AbstractC12H9BrN2, monoclinic, P21/c (no. 14), a = 19.2197(12) Å, b = 4.8579(3) Å, c = 11.4679(9) Å, β = 106.880(4)°, V = 1024.60(12) Å3, Z = 4, Rgt(F) = 0.0449, wRref(F2) = 0.1257, T = 100(2) K.
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Soobramoney L, Bala MD, Friedrich HB, Pillay MN. Flexible SNS pincer complexes of copper: Synthesis, structural characterisation and application in n-octane oxidation. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Nassar AM. Catalytic reactivity of new Ni(II), Cu(II) and Sn(II) complexes for decolorization of indigo carmine in aqueous solution, high efficiency of copper complex. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.4056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Amr Mohammad Nassar
- Chemistry Department, College of ScienceAljouf University PO Box 2014 Sakaka Aljouf Saudi Arabia
- Chemistry Department, Faculty of ScienceAl‐Azhar University Nasr city 11884 Cairo Egypt
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