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Holey SA, Basak P, Bojja S, Nayak RR. The fabrication of bifunctional supramolecular glycolipid-based nanocomposite gel: insights into electrocatalytic performance with effective selectivity towards gold. SOFT MATTER 2023; 19:6305-6313. [PMID: 37555430 DOI: 10.1039/d3sm00921a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Recovery, recycling, and reuse of metal waste have been re-intensified in the current era to build a sustainable future. In this context, gel nanocomposites were formulated by in situ reduction of gold within the low molecular weight gel matrix of synthetic glycolipid amphiphiles without using any external reducing/stabilizing agents. This strategy aroused the interest in formulating gel nanocomposites with preferential uptake of gold. The exclusive advantages owned by gold nanoparticle (GNP) embedded hydrogel offer an alternative to decorate the electrode surface without physical deposition/plating of the catalyst. Formation of GNP within the gel matrix was confirmed by the SPR peak in the UV-Visible spectrum. The particle size of 5-7 nm with zeta potential value in the range of -30.5 to -41.4 mV displayed good stability of nanoparticles in the gel matrix. Due to the encapsulation of nanoparticles within supramolecular assemblies of gel, a noteworthy increase in viscoelastic strength was observed, whereas the gelation behavior, melting temperature, and original fibrillar morphology of hydrogel remained intact. This hybrid gel exhibited good ionic conductivity (2.36 × 10-5 S cm-1) with appreciable ionic transport, remarkable oxygen reduction reaction (ORR) augmentation in reduction potential from 0 V to -0.12 V vs. Ag/AgCl as reference electrode, and excellent thermal stability in a wide temperature range. This green and efficient approach can pave the way for creating GNP-embedded hierarchical architecture that can act as bifunctional electrolyte/electrocatalyst material.
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Affiliation(s)
- Snehal Ashokrao Holey
- Department of Oils, Lipid Science and Technology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Pratyay Basak
- Department of Polymers and Functional Materials, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Sreedhar Bojja
- Department of Analytical and Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Rati Ranjan Nayak
- Department of Oils, Lipid Science and Technology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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Wang WL, Kanno A, Ishiguri A, Jin RH. Generation of sub-5 nm AuNPs in the special space of the loop-cluster corona of a polymer vesicle: preparation and its unique catalytic performance in the reduction of 4-nitrophenol. NANOSCALE ADVANCES 2023; 5:2199-2209. [PMID: 37056615 PMCID: PMC10089077 DOI: 10.1039/d2na00893a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 02/22/2023] [Indexed: 06/19/2023]
Abstract
The hybrid vesicle AuNP@LCCV, in which a large number of AuNPs with an average size of about 2.8 nm were densely and uniformly distributed in an isolated state throughout the corona of the unusual polymer vesicle, was prepared via in situ reduction of Au3+ ions, which were encapsulated in advance in the unique polymer vesicle (LCCV) consisting of a hydrophobic membrane of poly(2-phenyl-2-oxazoline) and a hydrophilic loop-cluster corona of polyethyleneimine. The vesicle was formed via self-assembly from a comb-like block copolymer in which a polystyrenic main chain was grafted densely with diblock polyethyleneimine-b-poly(2-phenyl-2-oxazoline) and acted as a reactor for the reduction of Au3+. The hybrid vesicle AuNP@LCCV showed powerful catalytic ability in the reduction of nitrophenols (NPs). Interestingly, the reduction reactions of NPs showed a remarkably long induction time, which could be shortened dramatically from 60 min to 1-2 min by greatly increasing the concentration of NaBH4. It is revealed that the oxygen adsorbed on the AuNPs significantly inhibited the reduction, causing the induction time. Once the oxygen is chemically cleaned from the surface of the AuNPs, the reduction of 4-NP proceeds gradually for a while and then completes suddenly. The reduction mechanism accompanying the oxygen-dependent induction time is proposed from the view of the strong oxygen affinity of the catalyst AuNP@LCCV.
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Affiliation(s)
- Wen-Li Wang
- Department of Material and Life Chemistry, Kanagawa University 3-27-1 Rokkakubashi Yokohama 221-8686 Japan
| | - Ayaka Kanno
- Department of Material and Life Chemistry, Kanagawa University 3-27-1 Rokkakubashi Yokohama 221-8686 Japan
| | - Amika Ishiguri
- Department of Material and Life Chemistry, Kanagawa University 3-27-1 Rokkakubashi Yokohama 221-8686 Japan
| | - Ren-Hua Jin
- Department of Material and Life Chemistry, Kanagawa University 3-27-1 Rokkakubashi Yokohama 221-8686 Japan
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A Third Angular Momentum of Photons. Symmetry (Basel) 2023. [DOI: 10.3390/sym15010158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Photons that acquire orbital angular momentum move in a helical path and are observed as a light ring. During helical motion, if a force is applied perpendicular to the direction of motion, an additional radial angular momentum is introduced, and alternate dark spots appear on the light ring. Here, a third, centrifugal angular momentum has been added by twisting the helical path further according to the three-step hierarchical assembly of helical organic nanowires. Attaining a third angular momentum is the theoretical limit for a photon. The additional angular momentum converts the dimensionless photon to a hollow spherical photon condensate with interactive dark regions. A stream of these photon condensates can interfere like a wave or disintegrate like matter, similar to the behavior of electrons.
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Chen R, Xu C, Lei Y, Liu H, Zhu Y, Zhang J, Xu L. Facile construction of a family of supramolecular gels with good levofloxacin hydrochloride loading capacity. RSC Adv 2021. [DOI: 10.1039/d1ra00809a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
A family of low molecular weight gelators with different alkyl chain lengths was constructed, having excellent gelation ability and antibiotic loading capacity. A low molecular weight hydrogelator was obtained by adjusting the length of alkyl chain.
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Affiliation(s)
- Renyuan Chen
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province
- School of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo
- China
| | - Caidie Xu
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province
- School of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo
- China
| | - Yihao Lei
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province
- School of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo
- China
| | - Hongxin Liu
- College of Chemistry and Materials Engineering
- Wenzhou University
- Wenzhou
- China
| | - Yabin Zhu
- Medical School of Ningbo University
- Ningbo 315211
- China
| | - Jianfeng Zhang
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province
- School of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo
- China
| | - Long Xu
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province
- School of Materials Science and Chemical Engineering
- Ningbo University
- Ningbo
- China
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Effect of hydrogen bonding and hydrophobicity on gel emulsions by benzenesulphonamide moiety-based amphiphiles: entrapment and release of vitamin B12. CHEMICAL PAPERS 2020. [DOI: 10.1007/s11696-020-01102-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Pan M, Yang J, Liu K, Yin Z, Ma T, Liu S, Xu L, Wang S. Noble Metal Nanostructured Materials for Chemical and Biosensing Systems. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E209. [PMID: 31991797 PMCID: PMC7074850 DOI: 10.3390/nano10020209] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 01/19/2020] [Accepted: 01/20/2020] [Indexed: 12/26/2022]
Abstract
Nanomaterials with unique physical and chemical properties have attracted extensive attention of scientific research and will play an increasingly important role in the future development of science and technology. With the gradual deepening of research, noble metal nanomaterials have been applied in the fields of new energy materials, photoelectric information storage, and nano-enhanced catalysis due to their unique optical, electrical and catalytic properties. Nanostructured materials formed by noble metal elements (Au, Ag, etc.) exhibit remarkable photoelectric properties, good stability and low biotoxicity, which received extensive attention in chemical and biological sensing field and achieved significant research progress. In this paper, the research on the synthesis, modification and sensing application of the existing noble metal nanomaterials is reviewed in detail, which provides a theoretical guidance for further research on the functional properties of such nanostructured materials and their applications of other nanofields.
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Affiliation(s)
- Mingfei Pan
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China; (M.P.); (J.Y.); (K.L.); (Z.Y.); (T.M.); (S.L.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Jingying Yang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China; (M.P.); (J.Y.); (K.L.); (Z.Y.); (T.M.); (S.L.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Kaixin Liu
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China; (M.P.); (J.Y.); (K.L.); (Z.Y.); (T.M.); (S.L.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Zongjia Yin
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China; (M.P.); (J.Y.); (K.L.); (Z.Y.); (T.M.); (S.L.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Tianyu Ma
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China; (M.P.); (J.Y.); (K.L.); (Z.Y.); (T.M.); (S.L.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Shengmiao Liu
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China; (M.P.); (J.Y.); (K.L.); (Z.Y.); (T.M.); (S.L.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Longhua Xu
- School of Food Science and Engineering, Shandong Agricultural University, Shandong 271018, China;
| | - Shuo Wang
- State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China; (M.P.); (J.Y.); (K.L.); (Z.Y.); (T.M.); (S.L.)
- Key Laboratory of Food Nutrition and Safety, Ministry of Education of China, Tianjin University of Science and Technology, Tianjin 300457, China
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Yu Y, Chu N, Pan Q, Zhou M, Qiao S, Zhao Y, Wang C, Li X. Solvent Effects on Gelation Behavior of the Organogelator Based on L-Phenylalanine Dihydrazide Derivatives. MATERIALS 2019; 12:ma12121890. [PMID: 31212767 PMCID: PMC6631004 DOI: 10.3390/ma12121890] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 06/03/2019] [Accepted: 06/04/2019] [Indexed: 12/23/2022]
Abstract
A series of organogelators based on L-phenylalanine has been synthesized and their gelation properties in various organic solvents were investigated. The results showed that these organogelators were capable of forming stable thermal and reversible organogels in various organic solvents at low concentrations, and the critical gel concentration (CGC) of certain solvents was less than 1.0 wt%. Afterward, the corresponding enthalpies (ΔHg) were extracted by using the van ’t Hoff equation, as the gel–sol temperature (TGS) was the function of the gelator concentration. The study of gelling behaviors suggested that L-phenylalanine dihydrazide derivatives were excellent gelators in solvents, especially BOC–Phe–OdHz (compound 4). The effects of the solvent on the self-assembly of gelators were analyzed by the Kamlet–Taft model, and the gelation ability of compound 4 in a certain organic solvent was described by Hansen solubility parameters and a Teas plot. Morphological investigation proved that the L-phenylalanine dihydrazide derivatives could assemble themselves into an ordered structure such as a fiber or sheet. Fourier-transform infrared spectroscopy (FTIR) and hydrogen nuclear magnetic resonance (1H NMR) studies indicated that hydrogen bonding, π–π stacking, and van der Waals forces played important roles in the formation of a gel.
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Affiliation(s)
- Yang Yu
- The Key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Ning Chu
- The Key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Qiaode Pan
- The Key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Miaomiao Zhou
- The Key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Sheng Qiao
- The Key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Yanan Zhao
- The Key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Chuansheng Wang
- The Key Laboratory of the Inorganic Molecule-Based Chemistry of Liaoning Province and Laboratory of Coordination Chemistry, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Xiangyun Li
- Yingkou Baoshan Ecology Coating Co., Ltd., Yingkou 115004, China.
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