51
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Shen Y, Zhao H, Sheng X. Theoretical study of hydrogen bond interactions of methanesulfonic acid with eugenol/methyleugenol. COMPUT THEOR CHEM 2023. [DOI: 10.1016/j.comptc.2022.113977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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52
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An NT, Duong NT, Tri NN, Trung NT. Role of O-H⋯O/S conventional hydrogen bonds in considerable C sp2 -H blue-shift in the binary systems of acetaldehyde and thioacetaldehyde with substituted carboxylic and thiocarboxylic acids. RSC Adv 2022; 12:35309-35319. [PMID: 36540253 PMCID: PMC9732747 DOI: 10.1039/d2ra05391h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Accepted: 11/27/2022] [Indexed: 09/10/2024] Open
Abstract
Stable binary complexes of RCZOH⋯CH3CHZ (R = CH3, H, F; Z = O, S) are due to contributions from the O-H⋯O/S and Csp2 -H⋯O/S hydrogen bonds. The strength of Csp2 /O-H⋯O is 1.5 to 2 times greater than that of the Csp2 /O-H⋯S bond. The substitution of H(Csp2 ) of HCZOH by CH3 causes a decrease in complex stability, while the opposite trend occurs for the F atom. A very large red shift of the O-H stretching frequency in O-H⋯O/S bonds was observed. A surprising Csp2 -H blue shift up to 104.5 cm-1 was observed for the first time. It is found that the presence of O-H⋯O/S hydrogen bonds and a decisive role of intramolecular hyperconjugation interactions in the complex cause a significant blue shift of the Csp2 -H covalent bonds. A striking role of O compared to the S atom in determining the blue shift of Csp2 -H stretching vibration and stability of binary complexes is proposed. The obtained results show that the ratio of deprotonation enthalpy and proton affinity could be considered as an index for the classification of the non-conventional hydrogen bond. SAPT2+ results show that the strength of RCSOH⋯CH3CHS complexes is dominated by electrostatic and induction energies, while a larger contribution to the stability of remaining complexes is detected for the electrostatic component.
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Affiliation(s)
- Nguyen Truong An
- Faculty of Natural Sciences, Quy Nhon University Quy Nhon Vietnam
| | - Nguyen Thi Duong
- Faculty of Natural Sciences, Quy Nhon University Quy Nhon Vietnam
| | - Nguyen Ngoc Tri
- Faculty of Natural Sciences, Quy Nhon University Quy Nhon Vietnam
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University Quy Nhon Vietnam
| | - Nguyen Tien Trung
- Faculty of Natural Sciences, Quy Nhon University Quy Nhon Vietnam
- Laboratory of Computational Chemistry and Modelling (LCCM), Quy Nhon University Quy Nhon Vietnam
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53
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Wang K, Wu L, Li Y, Li H. Preparation and characterization of chitosan/halloysite nanotubes composite film with ethylene scavenging and gas resistance for active food packaging. J Food Saf 2022. [DOI: 10.1111/jfs.13027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Kun Wang
- Faculty of Agriculture and Food Kunming University of Science and Technology Kunming China
| | - Linhuanyi Wu
- Faculty of Agriculture and Food Kunming University of Science and Technology Kunming China
| | - Yongshi Li
- Faculty of Agriculture and Food Kunming University of Science and Technology Kunming China
| | - Hui Li
- Faculty of Agriculture and Food Kunming University of Science and Technology Kunming China
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54
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In-situ Raman study of α-D-glucose under different pressure and temperature. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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55
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Muthusamy VP, Krishnakumar V. Tensile performance of NCC and lignin reinforcements in PAN matrix. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03300-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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56
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Choi J, Zabihi O, Varley RJ, Fox B, Naebe M. High Performance Carbon Fiber Structural Batteries Using Cellulose Nanocrystal Reinforced Polymer Electrolyte. ACS APPLIED MATERIALS & INTERFACES 2022; 14:45320-45332. [PMID: 36178739 DOI: 10.1021/acsami.2c11034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
In recent years, structural batteries have received great attention for future automotive application in which a load-bearing car panel is used as an energy storage. However, based on the current advances, achieving both high ionic conductivity and mechanical performance has remained a challenge. To address this challenge, this study introduces a cellulose nanocrystal (CNC) reinforced structural battery electrolyte (CSBE) consisting of CNC, triethylene glycol dimethyl ether (TriG) electrolyte containing a quasi-solid additive, e.g., cyclohexanedimethanol (CHDM), in a vinyl ester polymer. This green and renewable CSBE electrolyte system was in situ polymerized via reaction induced phase transition to form a high performance multidimensional channel electrolyte to be used in structural carbon fiber-based battery fabrication. The effect of various concentrations of CNC on the electrolyte ionic conductivity and mechanical properties was obtained in their relation to intermolecular interactions, interpreted by FTIR, Raman, Li NMR results. Compared to the neat SBE system, the optimized CSBE nanocomposite containing 2 wt % CNC shows a remarkable ionic conductivity of 1.1 × 10-3 S cm-1 at 30 °C, which reveals ∼300% improvement, alongside higher thermal stability. Based on the FTIR, Raman, Li NMR results, the content of CNC in the CSBE structure plays a crucial role not only in the formation of cellulose network skeleton but also in physical interaction with polymer matrix, providing an efficient Li+ pathway through the electrolyte matrix. The carbon fiber composite was fabricated by 2 wt % CNC reinforced SBE electrolyte to evaluate as a battery half-cell. The results demonstrated that by addition of 2 wt % CNC into SBE system, 7.6% and 33.9% improvements were achieved in specific capacity at 0.33 C and tensile strength, respectively, implying outstanding potential of ion conduction and mechanical load transfer between the carbon fibers and the electrolyte.
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Affiliation(s)
- Jaehoon Choi
- Carbon Nexus, Institute for Frontier Materials (IFM), Deakin University, Waurn Ponds, Victoria3216, Australia
| | - Omid Zabihi
- Carbon Nexus, Institute for Frontier Materials (IFM), Deakin University, Waurn Ponds, Victoria3216, Australia
| | - Russell J Varley
- Carbon Nexus, Institute for Frontier Materials (IFM), Deakin University, Waurn Ponds, Victoria3216, Australia
| | - Bronwyn Fox
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, Victoria3122, Australia
| | - Minoo Naebe
- Carbon Nexus, Institute for Frontier Materials (IFM), Deakin University, Waurn Ponds, Victoria3216, Australia
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57
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Investigations into the flotation of molybdenite in the presence of chalcopyrite using (3S,4S,5S,6R)-3,4,5,6-tetrahydroxyoxane-2-carboxylate acid as a novel selective depressant: An experimental and theoretical perspective. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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58
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Han J, Wang L, Cao W, Yuan Q, Zhou X, Liu S, Wang XB. Manifesting Direction-Specific Complexation in [HFIP -H·H 2O 2] -: Exclusive Formation of a High-Lying Conformation. J Phys Chem Lett 2022; 13:8607-8612. [PMID: 36073972 DOI: 10.1021/acs.jpclett.2c02237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Size-selective, negative ion photoelectron spectroscopy in conjunction with quantum chemical calculations is employed to investigate the geometric and electronic structures of a protype system in catalytic olefin epoxidation research, that is, deprotonated hexafluoroisopropanol ([HFIP-H]-) complexed with hydrogen peroxide (H2O2). Spectral assignments and molecular electrostatic surface analyses unveil a surprising prevalent existence of a high-lying isomer with asymmetric dual hydrogen-bonding configuration that is preferably formed driven by influential direction-specific electrostatic interactions upon H2O2 approaching [HFIP-H]- anion. Subsequent inspections of molecular orbitals, charge, and spin density distributions indicate the occurrence of partial charge transfer from [HFIP-H]- to H2O2 upon hydrogen-bonding interactions. Accompanied with electron detachment, a proton transfer occurs to form the neutral complex of [HFIP·HOO•] structure. This work conspicuously illustrates the importance of directionality encoded in intermolecular interactions involving asymmetric and complex molecules, while the produced hydroperoxyl radical HOO• offers a possible new pathway in olefin epoxidation chemistry.
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Affiliation(s)
- Jia Han
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Lei Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Wenjin Cao
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Qinqin Yuan
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Chemistry, Anhui University, Hefei, Anhui 230601, P. R. China
| | - Xiaoguo Zhou
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Shilin Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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59
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Nitu S, Milea MS, Boran S, Mosoarca G, Zamfir AD, Popa S, Funar-Timofei S. Experimental and Computational Study of Novel Pyrazole Azo Dyes as Colored Materials for Light Color Paints. MATERIALS (BASEL, SWITZERLAND) 2022; 15:5507. [PMID: 36013644 PMCID: PMC9410184 DOI: 10.3390/ma15165507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/21/2022] [Accepted: 07/25/2022] [Indexed: 06/15/2023]
Abstract
This paper presents the synthesis of eight new pyrazole azo dyes using ethyl 5-amino-3-methyl-1H-pyrazole-4-carboxylate as the diazotization component and various active methylene derivatives as coupling components. These new azo dyes were characterized by spectroscopic (FT-IR, UV-VIS), and spectrometric (1H NMR, 13C NMR, MS) analyses. The dye structures were modeled by the MMFF94s force field and quantum chemical density functional theory (DFT) calculations using the B3LYP functional and the 6-311G(d,p) basis set, in the gas phase. Weak electrostatic hydrogen bonds for the azo and hydrazo dye tautomers were found in the ground state. The CIS, TD (using the B3LYP and M06-2X functionals), and ZINDO methods were used to estimate the dye UV-VIS spectra in ethanol, which were compared with the experimental ones. The anti-configuration arrangement of the π-bonds and the presence of the prevalent hydrazo dye tautomer were supported by the computed 1H NMR and 13C NMR spectra. A good accordance between the experimental and predicted absorption maxima and chemical shifts was observed. Color investigations using the CIEL*a*b* space were conducted for all dyes in powder and for their mixtures in water-based acrylic resins. The results confirm the newly synthesized dyes' color properties and that they might be used for light color paints in the varnishes industry.
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Affiliation(s)
- Sabina Nitu
- Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University of Timisoara, Bd. V. Parvan, No. 6, 300223 Timisoara, Romania
| | - Marius Silviu Milea
- Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University of Timisoara, Bd. V. Parvan, No. 6, 300223 Timisoara, Romania
| | - Sorina Boran
- Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University of Timisoara, Bd. V. Parvan, No. 6, 300223 Timisoara, Romania
| | - Giannin Mosoarca
- Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University of Timisoara, Bd. V. Parvan, No. 6, 300223 Timisoara, Romania
| | - Alina D. Zamfir
- National Institute for Research and Development in Electrochemistry and Condensed Matter, 300224 Timisoara, Romania
| | - Simona Popa
- Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University of Timisoara, Bd. V. Parvan, No. 6, 300223 Timisoara, Romania
| | - Simona Funar-Timofei
- “Coriolan Dragulescu” Institute of Chemistry, Romanian Academy, 300223 Timisoara, Romania
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60
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An B, Li Z, Wang Z, Zeng X, Han X, Cheng Y, Sheveleva AM, Zhang Z, Tuna F, McInnes EJL, Frogley MD, Ramirez-Cuesta AJ, S Natrajan L, Wang C, Lin W, Yang S, Schröder M. Direct photo-oxidation of methane to methanol over a mono-iron hydroxyl site. NATURE MATERIALS 2022; 21:932-938. [PMID: 35773491 DOI: 10.1038/s41563-022-01279-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 05/05/2022] [Indexed: 06/15/2023]
Abstract
Natural gas, consisting mainly of methane (CH4), has a relatively low energy density at ambient conditions (~36 kJ l-1). Partial oxidation of CH4 to methanol (CH3OH) lifts the energy density to ~17 MJ l-1 and drives the production of numerous chemicals. In nature, this is achieved by methane monooxygenase with di-iron sites, which is extremely challenging to mimic in artificial systems due to the high dissociation energy of the C-H bond in CH4 (439 kJ mol-1) and facile over-oxidation of CH3OH to CO and CO2. Here we report the direct photo-oxidation of CH4 over mono-iron hydroxyl sites immobilized within a metal-organic framework, PMOF-RuFe(OH). Under ambient and flow conditions in the presence of H2O and O2, CH4 is converted to CH3OH with 100% selectivity and a time yield of 8.81 ± 0.34 mmol gcat-1 h-1 (versus 5.05 mmol gcat-1 h-1 for methane monooxygenase). By using operando spectroscopic and modelling techniques, we find that confined mono-iron hydroxyl sites bind CH4 by forming an [Fe-OH···CH4] intermediate, thus lowering the barrier for C-H bond activation. The confinement of mono-iron hydroxyl sites in a porous matrix demonstrates a strategy for C-H bond activation in CH4 to drive the direct photosynthesis of CH3OH.
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Affiliation(s)
- Bing An
- Department of Chemistry, University of Manchester, Manchester, UK
| | - Zhe Li
- College of Chemistry and Chemical Engineering, iCHEM, State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen, China
- Department of Chemistry, University of Chicago, Chicago, IL, USA
| | - Zi Wang
- Department of Chemistry, University of Manchester, Manchester, UK
| | - Xiangdi Zeng
- Department of Chemistry, University of Manchester, Manchester, UK
| | - Xue Han
- Department of Chemistry, University of Manchester, Manchester, UK
| | - Yongqiang Cheng
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Alena M Sheveleva
- Department of Chemistry, University of Manchester, Manchester, UK
- Photon Science Institute, University of Manchester, Manchester, UK
| | - Zhongyue Zhang
- Department of Chemistry, Nagoya University, Nagoya, Japan
| | - Floriana Tuna
- Department of Chemistry, University of Manchester, Manchester, UK
- Photon Science Institute, University of Manchester, Manchester, UK
| | - Eric J L McInnes
- Department of Chemistry, University of Manchester, Manchester, UK
- Photon Science Institute, University of Manchester, Manchester, UK
| | - Mark D Frogley
- Diamond Light Source, Harwell Science Campus, Didcot, UK
| | - Anibal J Ramirez-Cuesta
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | | | - Cheng Wang
- College of Chemistry and Chemical Engineering, iCHEM, State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen, China
| | - Wenbin Lin
- Department of Chemistry, University of Chicago, Chicago, IL, USA
| | - Sihai Yang
- Department of Chemistry, University of Manchester, Manchester, UK.
| | - Martin Schröder
- Department of Chemistry, University of Manchester, Manchester, UK.
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61
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De la Cruz LG, Abt T, León N, Wang L, Sánchez-Soto M. Ice-Template Crosslinked PVA Aerogels Modified with Tannic Acid and Sodium Alginate. Gels 2022; 8:gels8070419. [PMID: 35877504 PMCID: PMC9321210 DOI: 10.3390/gels8070419] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 06/25/2022] [Accepted: 07/02/2022] [Indexed: 12/24/2022] Open
Abstract
With the commitment to reducing environmental impact, bio-based and biodegradable aerogels may be one approach when looking for greener solutions with similar attributes to current foam-like materials. This study aimed to enhance the mechanical, thermal, and flame-retardant behavior of poly(vinyl alcohol) (PVA) aerogels by adding sodium alginate (SA) and tannic acid (TA). Aerogels were obtained by freeze-drying and post-ion crosslinking through calcium chloride (CaCl2) and boric acid (H3BO3) solutions. The incorporation of TA and SA enhanced the PVA aerogel’s mechanical properties, as shown by their high compressive specific moduli, reaching up to a six-fold increase after crosslinking and drying. The PVA/TA/SA aerogels presented a thermal conductivity of 0.043 to 0.046 W/m·K, while crosslinked ones showed higher values (0.049 to 0.060 W/m·K). Under TGA pyrolytic conditions, char layer formation reduced the thermal degradation rate of samples. After crosslinking, a seven-fold decrease in the thermal degradation rate was observed, confirming the high thermal stability of the formed foams. Regarding flammability, aerogels were tested through cone calorimetry. PVA/TA/SA aerogels showed a significant drop in the main parameters, such as the heat release rate (HRR) and the fire growth (FIGRA). The ion crosslinking resulted in a further reduction, confirming the improvement in the fire resistance of the modified compositions.
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Affiliation(s)
- Lucía G. De la Cruz
- Centre Català del Plàstic, Universitat Politècnica de Catalunya Barcelona Tech (EEBE-UPC), Av. d’Eduard Maristany, 16, 08019 Barcelona, Spain; (L.G.D.l.C.); (T.A.); (N.L.)
| | - Tobias Abt
- Centre Català del Plàstic, Universitat Politècnica de Catalunya Barcelona Tech (EEBE-UPC), Av. d’Eduard Maristany, 16, 08019 Barcelona, Spain; (L.G.D.l.C.); (T.A.); (N.L.)
| | - Noel León
- Centre Català del Plàstic, Universitat Politècnica de Catalunya Barcelona Tech (EEBE-UPC), Av. d’Eduard Maristany, 16, 08019 Barcelona, Spain; (L.G.D.l.C.); (T.A.); (N.L.)
| | - Liang Wang
- Key Laboratory of Advanced Textiles Composites of Ministry of Education, Tiangong University, Binshui West Road 399, Xiqing District, Tianjin 300387, China;
| | - Miguel Sánchez-Soto
- Centre Català del Plàstic, Universitat Politècnica de Catalunya Barcelona Tech (EEBE-UPC), Av. d’Eduard Maristany, 16, 08019 Barcelona, Spain; (L.G.D.l.C.); (T.A.); (N.L.)
- Correspondence: ; Tel.:+34-937398140
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62
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Fathima T K S, Banu A A, Devasena T, Ramaprabhu S. A novel, highly sensitive electrochemical 1,4-dioxane sensor based on reduced graphene oxide-curcumin nanocomposite. RSC Adv 2022; 12:19375-19383. [PMID: 35865592 PMCID: PMC9251910 DOI: 10.1039/d2ra01789j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Accepted: 04/21/2022] [Indexed: 12/26/2022] Open
Abstract
1,4-Dioxane is a carcinogenic, non-biodegradable, organic water pollutant which is used as a solvent in various industries. It is also formed as an undesired by-product in the cosmetic and pharmaceutical industry. Given its carcinogenicity and ability to pollute, it is desirable to develop a sensitive and selective sensor to detect it in drinking water and other water bodies. Current works on this sensor are very few and involve complex metal oxide composite systems. A sensitive electrochemical sensor for 1,4-dioxane was developed by modifying a glassy carbon electrode (GCE) with a reduced graphene oxide–curcumin (rGO–CM) nanocomposite synthesized by a simple solution approach. The prepared rGO–CM was characterized by X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR) Spectroscopy, Raman spectroscopy, UV-Vis spectroscopy, and Scanning Electron Microscopy (SEM). The rGO–CM/GCE sensor was employed for the detection of 1,4-dioxane in the range of 0.1–100 μM. Although, the detection range is narrower compared to reported literature, the sensitivity obtained for the proposed sensor is far superior. Moreover, the limit of detection (0.13 μM) is lower than the dioxane detection target defined by the World Health Organization (0.56 μM). The proposed rGO–CM/GCE also showed excellent stability and good recovery values in real sample (tap water and drinking water) analysis. Reduced graphene oxide–curcumin (rGO–CM) nanocomposite was prepared from graphite oxide using curcumin. The rGO–CM/GCE was used for highly sensitive 1,4-dioxane detection. The LOD obtained (0.13 μM) was lower than the WHO guideline value.![]()
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Affiliation(s)
- Sana Fathima T K
- Alternative Energy and Nanotechnology Laboratory, Nano Functional Materials and Technology Centre (NFMTC), Department of Physics, Indian Institute of Technology Madras Chennai 600036 India
| | - Arshiya Banu A
- Centre for Nanoscience and Technology, A.C. Tech Campus, Anna University Chennai 600025 India
| | - T Devasena
- Centre for Nanoscience and Technology, A.C. Tech Campus, Anna University Chennai 600025 India
| | - Sundara Ramaprabhu
- Alternative Energy and Nanotechnology Laboratory, Nano Functional Materials and Technology Centre (NFMTC), Department of Physics, Indian Institute of Technology Madras Chennai 600036 India
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63
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Zhu H, Xu C, Wang DW, Yakovlev VV, Zhang D. Enhanced Chemical Sensing with Multiorder Coherent Raman Scattering Spectroscopic Dephasing. Anal Chem 2022; 94:8409-8415. [PMID: 35623094 DOI: 10.1021/acs.analchem.2c01060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Molecular vibrational spectroscopy is widely used in various sensing and imaging applications, providing intrinsic information at the molecular level. Nonlinear optical interactions using ultrashort laser pulses facilitate the selective coherent excitation of molecular vibrational modes by focusing energy into specific molecular bonds, boosting the signal level for multiple orders of magnitude. The dephasing of such coherence, which is susceptible to the local molecular environment, however, is often neglected. The unique capability of vibrational dephasing dynamics to serve as a unique probe for complex molecular interactions and the effect of local nano- and microenvironments are beyond the reach of conventional, intensity-based spectroscopy. Here, we developed a novel multiorder coherent Raman spectroscopy platform with a special focus on the temporal evolution of molecular vibrational dephasing, termed as time-resolved coherent Raman scattering (T-CRS) spectroscopy. By utilizing a high dynamic range detection, molecular vibrational dynamics and the environmental effects are demonstrated with multidimensional spectroscopic sensing, which promises a new range of applications in biology, materials, and chemical sciences.
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Affiliation(s)
- Hanlin Zhu
- Interdisciplinary Center for Quantum Information, Zhejiang Province Key Laboratory of Quantum Technology and Device, and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310028 China
| | - Chenran Xu
- Interdisciplinary Center for Quantum Information, Zhejiang Province Key Laboratory of Quantum Technology and Device, and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310028 China
| | - Da-Wei Wang
- Interdisciplinary Center for Quantum Information, Zhejiang Province Key Laboratory of Quantum Technology and Device, and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310028 China
| | - Vladislav V Yakovlev
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843 United States.,Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843 United States.,Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77843 United States
| | - Delong Zhang
- Interdisciplinary Center for Quantum Information, Zhejiang Province Key Laboratory of Quantum Technology and Device, and Department of Physics, Zhejiang University, Hangzhou, Zhejiang 310028 China
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64
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Kipnusu WK, Zhuravlev E, Schick C, Kremer F. Homogeneous nucleation in polyamide 66, a two-stage process as revealed by combined nanocalorimetry and IR spectroscopy. Colloid Polym Sci 2022. [DOI: 10.1007/s00396-022-04980-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AbstractNanocalorimetry and Fourier transform infrared (FTIR) spectroscopy are combined to measure the calorimetric properties and molecular spectra of the same sample (sample amount about 5 ng) of polyamide 66 (PA66). By determining IR difference absorption spectra between a quenched and a sample annealed at varying temperatures (Ta) and annealing time (ta), the initial steps of homogeneous nucleation is for the first time revealed on a molecular scale, long before crystallization takes place. As starting point (i), isolated H-bonds are formed between (N–H) and (C = O) moieties of adjacent (neighboring) polymer segments promoted by far-reaching dipole–dipole interactions. In the second step (ii), the H-bonds realign, which in part requires the opening of already established H-bonds. In stage (i), the FTIR absorption intensity of the free (C = O)f moieties decreases while that of the H-bonded (C = O)b ones increases as a function of Ta at constant ta. This implies an increase in the H-bonding network in amorphous domains. The second stage of nucleation in the studied PA66 is characterized by an increase in the number of (C = O)f and a corresponding decrease in (C = O)b moieties as the sample transitions to the ordered crystalline structure. This is attributed to a change from γ to α polymorphs in PA66. The non-polar methylene units in PA66 are largely unaffected during the nucleation steps, where no changes in the overall heat capacity are detectable, proving that these changes occur prior to the onset of crystal growth.
Graphical abstract
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65
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High-Pressure Polymorphism in Hydrogen-Bonded Crystals: A Concise Review. CRYSTALS 2022. [DOI: 10.3390/cryst12050739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
High-pressure polymorphism is a developing interdisciplinary field. Pressure up to 20 GPa is a powerful thermodynamic parameter for the study and fabrication of hydrogen-bonded polymorphic systems. This review describes how pressure can be used to explore polymorphism and surveys the reports on examples of compounds that our group has studied at high pressures. Such studies have provided insight into the nature of structure–property relationships, which will enable crystal engineering to design crystals with desired architectures through hydrogen-bonded networks. Experimental methods are also briefly surveyed, along with two methods that have proven to be very helpful in the analysis of high-pressure polymorphs, namely, the ab initio pseudopotential plane–wave density functional method and using Hirshfeld surfaces to construct a graphical overview of intermolecular interactions.
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66
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Lee Y, Lim S, Song WJ, Lee S, Yoon SJ, Park JM, Lee MG, Park YL, Sun JY. Triboresistive Touch Sensing: Grid-Free Touch-Point Recognition Based on Monolayered Ionic Power Generators. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2108586. [PMID: 35245965 DOI: 10.1002/adma.202108586] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 02/22/2022] [Indexed: 05/06/2023]
Abstract
Recent growing pursuit of skin-mountable devices has been impeded by the complicated structures of most sensing systems, containing electrode grids, stacked multilayers, and even external power sources. Here, a type of touch sensing, termed "triboresistive touch sensing", is introduced for gridless touch recognition based on monolayered ionic power generators. A homogeneous monolayer, i.e., ionic poly(dimethylsiloxane) (PDMS), generates electricity based on the electric field generated by touch. Voltages generated at each corner of the ionic PDMS rely on resistance between touch points and each corner, ensuring recognition of the touch positions without the need for electrode grid layers and external power sources. With notable advantages of high transparency (96.5%), stretchability (539.1%), and resilience (99.0%) of the ionic PDMS, epidermal triboresistive sensing is demonstrated to express touch position and readily play a musical instrument. A gridless system of triboresistive sensing allows rearrangement of the touch sections according to a given situation without any physical modification, and thus easily completes consecutive missions of controlling position, orientation, and gripping functions of a robot.
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Affiliation(s)
- Younghoon Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Department of Mechanical Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sungsoo Lim
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Won Jun Song
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sudong Lee
- Department of Mechanical Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sohee John Yoon
- Department of Mechanical Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jae-Man Park
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Min-Gyu Lee
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Yong-Lae Park
- Department of Mechanical Engineering, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jeong-Yun Sun
- Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, Republic of Korea
- Research Institute of Advanced Materials (RIAM), Seoul National University, Seoul, 08826, Republic of Korea
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67
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Rahimi R, Shachar A, Bar I. Experimental/Computational Study on the Impact of Fluorine on the Structure and Noncovalent Interactions in the Monohydrated Cluster of ortho-Fluorinated 2-Phenylethylamine. J Am Chem Soc 2022; 144:8337-8346. [PMID: 35471862 DOI: 10.1021/jacs.2c02480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Fluorine-containing medicinal compounds frequently allow modulation of physical-chemical properties. Here, we address the effect of fluorine, near the ethylamino side chain, on conformational flexibility and noncovalent interactions (NCIs) of the selected jet-cooled monohydrated cluster of 2-(2-fluoro-phenyl)-ethylamine (2-FPEA) by mass-selected resonance-enhanced two-photon ionization and ionization-loss stimulated Raman spectroscopies. Our results show that Raman spectral signatures of the 2-FPEA-H2O cluster match the scaled harmonic vibrational Raman frequencies, resulting from density functional theory calculations of the most stable 2-FPEA gauche conformer hydrogen-bonded (HB) to water, confirming the three-dimensional cluster structure. This predicted electronic structure, together with NCI analysis, allows visualization and assessment of the attractive and repulsive interactions. The comparison of the NCIs and revealed red (O-H and N-H stretches) and blue shifts (C-H stretches and CH2 out-of-plane bends) of the cluster to other class members confirm O-H···N, N-H···π, C-H···O, and C-H···F HB formation and their contribution to structure stabilization, uncovering the potential of the approach.
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Affiliation(s)
- Rami Rahimi
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Afik Shachar
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Ilana Bar
- Department of Physics, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
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68
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Oram BK, Monu, Bandyopadhyay B. Impact of donor acidity on ν C≡N and ν O–H spectral shifts in O-H···N≡C H-bonded complexes between nitriles and alcohols: a combined IR spectroscopic and quantum chemical investigation. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2061387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Binod Kumar Oram
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, India
| | - Monu
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, India
| | - Biman Bandyopadhyay
- Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jaipur, India
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69
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Kovač V, Kodrin I, Radošević K, Molčanov K, Adhikari B, Kraatz HB, Barišić L. Oxalamide-Bridged Ferrocenes: Conformational and Gelation Properties and In Vitro Antitumor Activity. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00661] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Veronika Kovač
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
| | - Ivan Kodrin
- Department of Organic Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102A, 10000 Zagreb, Croatia
| | - Kristina Radošević
- Department of Biochemical Engineering, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
| | - Krešimir Molčanov
- Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, 10000 Zagreb, Croatia
| | - Bimalendu Adhikari
- Department of Chemistry, National Institute of Technology, Rourkela, Sundargarh 769008, Odisha, India
| | - Heinz-Bernhard Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4, Canada
- Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada
| | - Lidija Barišić
- Department of Chemistry and Biochemistry, Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
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70
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Le NMN, Le-Vinh B, Friedl JD, Jalil A, Kali G, Bernkop-Schnürch A. Polyaminated pullulan, a new biodegradable and cationic pullulan derivative for mucosal drug delivery. Carbohydr Polym 2022; 282:119143. [DOI: 10.1016/j.carbpol.2022.119143] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 01/05/2022] [Accepted: 01/11/2022] [Indexed: 11/02/2022]
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71
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Li WZ, Li X, Yang F, Chen Y, Wang YX. Visualization of Solvent-Induced Structure Evolution in Cyclodextrin Polyrotaxane Gels. Macromol Rapid Commun 2022; 43:e2200082. [PMID: 35318772 DOI: 10.1002/marc.202200082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/09/2022] [Indexed: 12/13/2022]
Abstract
Cyclodextrin (CD)-based polyrotaxanes (PR) are widely used to construct high-mechanical-performance materials because of the high degree of conformational freedom. However, strong hydrogen bonds between CDs greatly limit the application of CD-PR in the preparation of ductile neutral hydrogels. In this work, spiropyrane (SP) into α-CD-based PR is introduced to "visualize" the segment motion of the network in neutral water. The aggregation-induced cohesion and critical factors for the force transmission are disclosed. This system offers a new approach for the fundamental research for the complicated topologically cross-linked structures, which is important for the design of CD-PR-based biocompatible soft materials.
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Affiliation(s)
- Wei-Zhen Li
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, P. R. China
| | - Xiaopei Li
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, P. R. China
| | - Fan Yang
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, P. R. China
| | - Yulan Chen
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, P. R. China.,State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China
| | - Yi-Xuan Wang
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Tianjin, 300072, P. R. China.,Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, P. R. China
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72
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Dutta J, Sahu AK, Bhadauria AS, Biswal HS. Carbon-Centered Hydrogen Bonds in Proteins. J Chem Inf Model 2022; 62:1998-2008. [PMID: 35293733 DOI: 10.1021/acs.jcim.2c00015] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Hydrogen bonding (H-bonding) without lone pair(s) of electrons and π-electrons is a concept developed 2-3 years ago. H-bonds involving less electronegative tetrahedral carbon are beyond the classical concept of H-bonds. Herein, we present the first report on H-bonds with tetravalent carbons in proteins. A special bonding arrangement is needed to increase the negative charge density around the sp3-hybridized carbon atom. Therefore, less electronegative elements such as As and Mg, when bonded to sp3-C, enable the C-atoms as H-bond acceptors. Careful protein structure analysis aided by several quantum chemical calculations suggests that these H-bonds are weak to moderate in strength. We developed an empirical equation to estimate the C-H···C H-bond energy in proteins from the distances between the C- and H-atoms. In proteins, the binding energies range from -5.4 to -14.0 kJ/mol. The C-H···C H-bonds assist the substrate binding in proteins. We also explored the potential role of these carbon-centered H-bonds in C-H bond activation through σ-bond metathesis. To our surprise, contribution from these H-bonds is almost of similar magnitude as that from C-H···π H-bonds for C-H bond activation.
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Affiliation(s)
- Juhi Dutta
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhimpur-Padanpur, Via-Jatni, Khurda, Bhubaneswar 752050, India.,Training School Complex, Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
| | - Akshay Kumar Sahu
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhimpur-Padanpur, Via-Jatni, Khurda, Bhubaneswar 752050, India.,Training School Complex, Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
| | - Abhijeet S Bhadauria
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhimpur-Padanpur, Via-Jatni, Khurda, Bhubaneswar 752050, India.,Training School Complex, Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
| | - Himansu S Biswal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhimpur-Padanpur, Via-Jatni, Khurda, Bhubaneswar 752050, India.,Training School Complex, Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
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73
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Lee J, Seo Y, Kang DW, Park S, Kim H, Kim J, Kim K, Hong CS, Lim DW, Lee E. Reversible ammonia uptake at room temperature in a robust and tunable metal-organic framework. RSC Adv 2022; 12:7605-7611. [PMID: 35424727 PMCID: PMC8982270 DOI: 10.1039/d2ra01270g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 03/03/2022] [Indexed: 11/21/2022] Open
Abstract
Ammonia is useful for the production of fertilizers and chemicals for modern technology, but its high toxicity and corrosiveness are harmful to the environment and human health. Here, we report the recyclable and tunable ammonia adsorption using a robust imidazolium-based MOF (JCM-1) that uptakes 5.7 mmol g−1 of NH3 at 298 K reversibly without structural deformation. Furthermore, a simple substitution of NO3− with Cl− in a post-synthetic manner leads to an increase in the NH3 uptake capacity of JCM-1(Cl−) up to 7.2 mmol g−1. Recyclable and tunable ammonia adsorption with JCM-1 and JCM-1(Cl−) at room temperature occurs reversibly without structural decomposition.![]()
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Affiliation(s)
- Jaechul Lee
- Department of Chemistry, Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
| | - Younggyu Seo
- Department of Chemistry, Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
| | - Dong Won Kang
- Department of Chemistry, Korea University Seoul 02841 Republic of Korea
| | - Seungjae Park
- Department of Chemistry, Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
| | - Hyunyong Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
| | - Jaheon Kim
- Department of Chemistry, Soongsil University Seoul 06978 Republic of Korea
| | - Kimoon Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea .,Division of Advanced Materials Science, Pohang University of Science and Technology Pohang 37673 Republic of Korea.,Center for Self-assembly and Complexity, Institute for Basic Science (IBS) Pohang 37673 Republic of Korea
| | - Chang Seop Hong
- Department of Chemistry, Korea University Seoul 02841 Republic of Korea
| | - Dae-Woon Lim
- Department of Chemistry, Graduate School of Science, Kyoto University Kitashirakawa Oiwakecho, Sakyo-ku Kyoto 606-8502 Japan.,Department of Chemistry and Medical Chemistry, Yonsei University Wonju 26493 Republic of Korea
| | - Eunsung Lee
- Department of Chemistry, Pohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea .,Division of Advanced Materials Science, Pohang University of Science and Technology Pohang 37673 Republic of Korea
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74
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Donato MT, Santos L, Diogo HP, Colaço R, Branco LC, Saramago B. Eutectic systems containing an ionic liquid and PEG200 as lubricants for silicon surfaces: Effect of the mixture’s molar ratio. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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75
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Sosulin IS, Feldman VI. Spectroscopy and radiation-induced chemistry of an atmospherically relevant CH 2F 2…H 2O complex: Evidence for the formation of CF 2…H 2O complex as revealed by FTIR matrix isolation and ab initio study. CHEMOSPHERE 2022; 291:132967. [PMID: 34800497 DOI: 10.1016/j.chemosphere.2021.132967] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 11/09/2021] [Accepted: 11/16/2021] [Indexed: 06/13/2023]
Abstract
Difluoromethane is considered among the environment friendly alternatives to the ozone depleting chlorofluorocarbons. Due to its chemical inertness and lack of UV absorption above 200 nm, this compound can easily come to the upper layers forming complexes with widely abundant atmospheric components, such as water. The radiation-induced degradation of this compound and its complexes may be significant for reliable prediction of its long-term evolution in the environment as well as for development of new ways for its removal. In this work we have studied the vibrational spectroscopic properties and mechanisms of the radiation-induced decay of the CH2F2⋯H2O under the action of X-rays using matrix isolation FTIR spectroscopy and ab initio calculations. The IR spectrum of the complex in an argon matrix was characterized for the first time and assigned to a hydrogen-bonded structure with a binding energy of 11.1 kJ/mol (2.65 kcal/mol) (CCSD(T)/CBS level of theory). Complexation with water leads to a certain suppression of the efficiency of the radiation-induced decomposition of difluoromethane. The obtained results provide evidence for the radiation-induced formation of previously unreported CF2⋯H2O complex (in addition to other oxygen containing molecules, such as COF2 and CO). As demonstrated by calculations, the new difluorocarbene complex reveals a hydrogen bond and it is characterized by a binding energy of 5.73 kJ/mol (1.37 kcal/mol) (CCSD(T)/CBS level of theory).
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Affiliation(s)
- Ilya S Sosulin
- Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia
| | - Vladimir I Feldman
- Department of Chemistry, Lomonosov Moscow State University, Moscow, 119991, Russia.
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76
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Wongphan P, Khowthong M, Supatrawiporn T, Harnkarnsujarit N. Novel edible starch films incorporating papain for meat tenderization. Food Packag Shelf Life 2022. [DOI: 10.1016/j.fpsl.2021.100787] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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77
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Joshi P, Sharma OP, Ganguly SK, Srivastava M, Khatri OP. Fruit waste-derived cellulose and graphene-based aerogels: Plausible adsorption pathways for fast and efficient removal of organic dyes. J Colloid Interface Sci 2022; 608:2870-2883. [PMID: 34802756 DOI: 10.1016/j.jcis.2021.11.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 11/02/2021] [Accepted: 11/05/2021] [Indexed: 01/19/2023]
Abstract
A wide range of organic pollutants in industrial effluents, agricultural runoff, and domestic discharges are exacerbating water scarcity, leading to water-borne ailments, and adversely affecting the marine ecosystem and biodiversity. The efficient, sustainable, and cost-effective materials need to be addressed urgently for the removal of organic pollutants. Herein, ultra-light (0.018 g.cm-3) and highly porous (96.4%) composite aerogel is prepared by gelatinization of graphene oxide with fruit waste-derived cellulose. The macroscopic porosity generated by interconnecting cellulosic skeleton and graphene oxide sheets via hydrogen bonding network provided ample avenues for transport and diffusion of organic dyes-enriched wastewater throughout the cellulose-graphene oxide composite aerogel (CGA). Consequently, organic dyes are efficiently adsorbed by easily accessible surface sites distributed throughout the CGA. The size, charge, and chemical structure of organic dyes along with textural features and accessible surface active sites of CGA governed the adsorption process. The spectroscopic analyses based on FTIR, Raman, and XPS measurements suggest electrostatic, n-π, π-π, cation-π interactions, dipole-dipole hydrogen, and Yoshida hydrogen linkages as major interactive pathways for the adsorption of organic dyes by the CGA. Moreover, the composite aerogel furnished an excellent recyclability for the adsorptive removal of organic pollutants from wastewater. The present work promises the potential of 2D nanostructured layered materials and fruit-waste-derived composite aerogels for sustainable utilization in wastewater treatment, which can be an excellent step towards water security.
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Affiliation(s)
- Pratiksha Joshi
- CSIR-Indian Institute of Petroleum, Dehradun 248005, India; Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Om P Sharma
- CSIR-Indian Institute of Petroleum, Dehradun 248005, India
| | - Sudip K Ganguly
- CSIR-Indian Institute of Petroleum, Dehradun 248005, India; Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Manoj Srivastava
- CSIR-Indian Institute of Petroleum, Dehradun 248005, India; Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - Om P Khatri
- CSIR-Indian Institute of Petroleum, Dehradun 248005, India; Academy of Scientific and Innovative Research, Ghaziabad 201002, India.
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78
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Pocheć M, Krupka KM, Panek JJ, Orzechowski K, Jezierska A. Intermolecular Interactions and Spectroscopic Signatures of the Hydrogen-Bonded System-n-Octanol in Experimental and Theoretical Studies. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27041225. [PMID: 35209010 PMCID: PMC8878718 DOI: 10.3390/molecules27041225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/06/2022] [Accepted: 02/09/2022] [Indexed: 11/29/2022]
Abstract
n-Octanol is the object of experimental and theoretical study of spectroscopic signatures and intermolecular interactions. The FTIR measurements were carried out at 293 K for n-octanol and its deuterated form. Special attention was paid to the vibrational features associated with the O-H stretching and the isotope effect. Density Functional Theory (DFT) in its classical formulations was applied to develop static models describing intermolecular hydrogen bond (HB) and isotope effect in the gas phase and using solvent reaction field reproduced by Polarizable Continuum Model (PCM). The Atoms in Molecules (AIM) theory enabled electronic structure and molecular topology study. The Symmetry-Adapted Perturbation Theory (SAPT) was used for energy decomposition in the dimers of n-octanol. Finally, time-evolution methods, namely classical molecular dynamics (MD) and Car-Parrinello Molecular Dynamics (CPMD) were employed to shed light onto dynamical nature of liquid n-octanol with emphasis put on metric and vibrational features. As a reference, CPMD gas phase results were applied. Nuclear quantum effects were included using Path Integral Molecular Dynamics (PIMD) and a posteriori method by solving vibrational Schrödinger equation. The latter applied procedure allowed to study the deuterium isotope effect.
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79
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Kumar N, Murli C, Varma M, Poswal HK, Thomas S, Kshirsagar RJ. High pressure Raman investigation on trans-urocanic acid. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 266:120438. [PMID: 34627016 DOI: 10.1016/j.saa.2021.120438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 08/27/2021] [Accepted: 09/22/2021] [Indexed: 06/13/2023]
Abstract
Trans-urocanic acid (t-UCA) is an important epidermal UV protector predominantly found in human skin. Exposure of UV radiation triggers photoisomerization of t-UCA into its other conformer, cis-urocanic acid (cis-UCA), which has been shown to be a mediator of UV-induced immune-suppression leading to skin cancer. In this report, we present the investigation of molecular changes of t-UCA under high pressures by in-situ high pressure Raman spectroscopy. The study indicates onset of ring opening polymerization of t-UCA at pressure above 1.4 GPa. At pressures beyond 5 GPa, a well discernible characteristic vibrational mode (CC stretch) accompanied by several other spectral features such as δ CO2- and δ NH modes of cis-UCA point towards the isomerization of residual t-UCA monomers into cis-UCA. The content of cis-UCA gradually increased with increase in pressure. On release to ambient conditions, the spectrum of the quenched sample showed Raman modes of polymer and cis-UCA indicating that the changes are irreversible.
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Affiliation(s)
- Naveen Kumar
- Infrared Laser Spectroscopy Section, Bhabha Atomic Research Centre, Trombay, Mumbai 85, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 94, India.
| | - C Murli
- High Pressure & Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 85, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 94, India
| | - Meera Varma
- High Pressure & Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 85, India
| | - H K Poswal
- High Pressure & Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 85, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 94, India
| | - S Thomas
- High Pressure & Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai 85, India.
| | - R J Kshirsagar
- Infrared Laser Spectroscopy Section, Bhabha Atomic Research Centre, Trombay, Mumbai 85, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai 94, India
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80
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Nye RA, Wang S, Uhlenbrock S, Smythe JA, Parsons GN. In situ analysis of growth rate evolution during molecular layer deposition of ultra-thin polyurea films using aliphatic and aromatic precursors. Dalton Trans 2022; 51:1838-1849. [PMID: 35018915 DOI: 10.1039/d1dt03689k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Organic thin films formed by molecular layer deposition (MLD) are important for next-generation electronics, energy storage, photoresists, protective barriers and other applications. This study uses in situ ellipsometry and quartz crystal microbalance to explore growth initiation and growth rate evolution during MLD of polyurea using aromatic p-phenylene diisocyanate (PDIC) or aliphatic 1,6-hexamethylene diisocyanate (HDIC) combined with ethylenediamine (ED) or 1,6-hexanediamine (HD) co-reactants. During the first 10-20 cycles of growth, we show the growth rate can increase and/or decrease substantially depending on the substrate as well as the flexibility, length, and structure of the isocyanate and amine reactants used. The transition from initial to steady growth is attributed to a change in active surface site density as the growth proceeds, where the number of sites is determined by a balance between steric effects that block active sites, double reactions that consume multiple active sites, and precursor physisorption and sub-surface diffusion that create new active sites, where the extent of each mechanism depends on the precursors and deposition conditions. Results shown here provide useful insight into mechanisms needed to control growth of ultra-thin organic films for advanced applications.
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Affiliation(s)
- Rachel A Nye
- Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, North Carolina 27606, USA.
| | - Siyao Wang
- Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, North Carolina 27606, USA.
| | | | - John A Smythe
- Micron Technology Inc., 8000 S Federal Way, Boise, Idaho 83716, USA
| | - Gregory N Parsons
- Department of Chemical and Biomolecular Engineering, North Carolina State University, 911 Partners Way, Raleigh, North Carolina 27606, USA.
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81
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Kamali K, Joseph B, Narayana C. Stability of zeolitic imidazolate frameworks (ZIF-7) under high pressures and its implications on storage applications of ZIFs. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.122973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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82
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Isamura BK, Lobb KA, Muya JT. Regioselectivity, chemical bonding and physical nature of the interaction between imidazole and XAHs (X=H, F, Cl, Br, CH3, and A=S, Se, Te). Mol Phys 2022. [DOI: 10.1080/00268976.2022.2026511] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Bienfait Kabuyaya Isamura
- Department of Chemistry, Rhodes University, Makhanda, South Africa
- Department of Chemistry, Faculty of Sciences, University of Kinshasa, XI, Kinshasa, DR Congo
- Research Center for Theoretical Chemistry and Physics in Central Africa, Faculty of Science, University of Kinshasa, Kinshasa, DR Congo
| | - Kevin Alan Lobb
- Department of Chemistry, Rhodes University, Makhanda, South Africa
- Research Unit in Bioinformatics (RUBi), Rhodes University, Makhanda, South Africa
| | - Jules Tshishimbi Muya
- Department of Chemistry, Faculty of Sciences, University of Kinshasa, XI, Kinshasa, DR Congo
- Research Center for Theoretical Chemistry and Physics in Central Africa, Faculty of Science, University of Kinshasa, Kinshasa, DR Congo
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83
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Ren Q, Wu M, Weng Z, Zhu X, Li W, Huang P, Wang L, Zheng W, Ohshima M. Promoted formation of stereocomplex in enantiomeric poly(lactic acid)s induced by cellulose nanofibers. Carbohydr Polym 2022; 276:118800. [PMID: 34823806 DOI: 10.1016/j.carbpol.2021.118800] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 10/17/2021] [Accepted: 10/18/2021] [Indexed: 11/02/2022]
Abstract
Stereocomplex (SC) crystallization between enantiomeric poly(L-lactic acid) (PLLA) and poly(D-lactic acid) (PDLA) is believed to yield poly(lactic acid) (PLA) with superior physiochemical properties. However, homocrystallization (HC) crystallites are inevitably generated in the PLLA/PDLA blends. Herein, we report a simple approach to fabricate PLLA/PDLA racemic blends with high contents of SC crystallites by introducing cellulose nanofibers (CNFs). The isothermal crystallization results revealed that the half-crystallization time of the PLLA/PDLA blend was significantly decreased by adding CNFs. Additionally, with the incorporation of 3 wt% modified CNFs, the PLLA/PDLA blend was overwhelmingly crystallized into SC crystallites with no HC crystallite formation. Based on Fourier transform infrared spectroscopy findings, it was speculated that the preferred SC crystallization of PLLA/PDLA/CNF was caused by enhanced interchain molecular interactions between CNFs and PLA. This work presents a feasible and efficient method to fabricate PLA with exclusively SC crystallites, which possesses great potential for producing high-performance PLA materials.
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Affiliation(s)
- Qian Ren
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Minghui Wu
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Advanced Materials and Composites Department, University of Nottingham Ningbo China, 199 Taikang East Road, Ningbo 315000, China
| | - Zhengsheng Weng
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Xiuyu Zhu
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang Province 315211, China
| | - Wanwan Li
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang Province 315211, China
| | - Pengke Huang
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
| | - Long Wang
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Wenge Zheng
- Ningbo Key Lab of Polymer Materials, Ningbo Institute of Material Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Masahiro Ohshima
- Department of Chemical Engineering, Kyoto University, Katsura, Kyoto 6158510, Japan.
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84
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Cuc NTT, An NT, Ngan VT, Chandra AK, Trung NT. Importance of water and intramolecular interaction governs substantial blue shift of Csp2–H stretching frequency in complexes between chalcogenoaldehydes and water. RSC Adv 2022; 12:1998-2008. [PMID: 35425273 PMCID: PMC8979115 DOI: 10.1039/d1ra07444j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 01/04/2022] [Indexed: 11/25/2022] Open
Abstract
Geometrical structure, stability and cooperativity, and contribution of hydrogen bonds to the stability of complexes between chalcogenoaldehydes and water were thoroughly investigated using quantum chemical methods. The stability of the complexes increases significantly when one or more H2O molecules are added to the binary system, whereas it decreases sharply going from O to S, Se, or Te substitution. The O–H⋯O H-bond is twice as stable as Csp2–H⋯O and O–H⋯S/Se/Te H-bonds. It is found that a considerable blue-shift of Csp2–H stretching frequency in the Csp2–H⋯O H-bond is mainly determined by an addition of water into the complexes along with the low polarity of the Csp2–H covalent bond in formaldehyde and acetaldehyde. The Csp2–H stretching frequency shift as a function of net second hyperconjugative energy for the σ*(Csp2–H) antibonding orbital is observed. Remarkably, a considerable Csp2–H blue shift of 109 cm−1 has been reported for the first time. Upon the addition of H2O into the binary systems, halogenated complexes witness a decreasing magnitude of the Csp2–H stretching frequency blue-shift in the Csp2–H⋯O H-bond, whereas CH3-substituted complexes experience the opposite trend. The considerable blue shift of Csp2–H stretching frequency.![]()
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Affiliation(s)
- Nguyen Thi Thanh Cuc
- Laboratory of Computational Chemistry and Modelling (LCCM), Department of Chemistry, Faculty of Natural Sciences, Quy Nhon University, Vietnam
| | - Nguyen Truong An
- Laboratory of Computational Chemistry and Modelling (LCCM), Department of Chemistry, Faculty of Natural Sciences, Quy Nhon University, Vietnam
| | - Vu Thi Ngan
- Laboratory of Computational Chemistry and Modelling (LCCM), Department of Chemistry, Faculty of Natural Sciences, Quy Nhon University, Vietnam
| | - Asit. K. Chandra
- Department of Chemistry, North-Eastern Hill University, Shillong 793022, Meghalaya, India
| | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modelling (LCCM), Department of Chemistry, Faculty of Natural Sciences, Quy Nhon University, Vietnam
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85
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Rath H, Jana M, Narayanasamy R, Usharani D, Tripathi K. Fluoride ion Coordination-Induced Turn-On Fluorescence of Tailored N-Methyl N-Confused Tripyrromonomethene Analogues. Org Biomol Chem 2022; 20:6741-6749. [DOI: 10.1039/d2ob01180h] [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
Inorder to achieve striking compromise between flexibility and rigidity, two unprecedented highly air-stable N-methyl N-Confused tripyrromonomethene analogues in near quantitative yields have been synthesized by chloranil oxidation under aerobic condition....
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86
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Patkar D, Ahirwar MB, Shrivastava SP, Deshmukh MM. Assessment of hydrogen bond strengths and cooperativity in self- and cross-associating cyclic (HF)m(H2O)n (m + n = 2 to 8) clusters. NEW J CHEM 2022. [DOI: 10.1039/d1nj05431g] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
In this work, we investigated the strengths of various self- and cross-associating hydrogen bonds (HBs) in mixed hydrogen fluoride–water cyclic (HF)m(H2O)n (m + n = 2 to 8) clusters, employing a molecular tailoring approach (MTA)-based method.
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Affiliation(s)
- Deepak Patkar
- Department of Chemistry, Dr Harisingh Gour Vishwavidyalaya (A Central University), Sagar, 470003, India
| | - Mini Bharati Ahirwar
- Department of Chemistry, Dr Harisingh Gour Vishwavidyalaya (A Central University), Sagar, 470003, India
| | - Satya Prakash Shrivastava
- Department of Chemistry, Dr Harisingh Gour Vishwavidyalaya (A Central University), Sagar, 470003, India
| | - Milind M. Deshmukh
- Department of Chemistry, Dr Harisingh Gour Vishwavidyalaya (A Central University), Sagar, 470003, India
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87
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Wibowo ES, Park BD, Causin V. Recent advances in urea–formaldehyde resins: converting crystalline thermosetting polymers back to amorphous ones. POLYM REV 2021. [DOI: 10.1080/15583724.2021.2014520] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Eko Setio Wibowo
- Department of Wood and Paper Science, Kyungpook National University, Daegu, Republic of Korea
| | - Byung-Dae Park
- Department of Wood and Paper Science, Kyungpook National University, Daegu, Republic of Korea
| | - Valerio Causin
- Departimento di Scienze Chimiche, Università di Padova, Padova, Italy
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88
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Pullanchery S, Kulik S, Rehl B, Hassanali A, Roke S. Charge transfer across C-H⋅⋅⋅O hydrogen bonds stabilizes oil droplets in water. Science 2021; 374:1366-1370. [PMID: 34882471 DOI: 10.1126/science.abj3007] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
[Figure: see text].
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Affiliation(s)
- Saranya Pullanchery
- Laboratory for Fundamental BioPhotonics, Institute of Bioengineering (IBI), School of Engineering (STI), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Sergey Kulik
- Laboratory for Fundamental BioPhotonics, Institute of Bioengineering (IBI), School of Engineering (STI), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Benjamin Rehl
- Laboratory for Fundamental BioPhotonics, Institute of Bioengineering (IBI), School of Engineering (STI), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Ali Hassanali
- International Centre for Theoretical Physics, 34100 Trieste, Italy
| | - Sylvie Roke
- Laboratory for Fundamental BioPhotonics, Institute of Bioengineering (IBI), School of Engineering (STI), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.,Institute of Materials Science and Engineering (IMX), School of Engineering (STI), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.,Lausanne Centre for Ultrafast Science, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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89
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Cuc NTT, Phan CTD, Nhung NTA, Nguyen MT, Trung NT, Ngan VT. Theoretical Aspects of Nonconventional Hydrogen Bonds in the Complexes of Aldehydes and Hydrogen Chalcogenides. J Phys Chem A 2021; 125:10291-10302. [PMID: 34818019 DOI: 10.1021/acs.jpca.1c06708] [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
Hydrogen bonds (H-bonds) in the complexes between aldehydes and hydrogen chalcogenides, XCHO...nH2Z with X = H, F, Cl, Br, and CH3, Z = O, S, Se, and Te, and n = 1,2, were investigated using high-level ab initio calculations. The Csp2-H...O H-bonds are found to be about twice as strong as the Csp2-H...S/Se/Te counterparts. Remarkably, the S/Se/Te-H...S/Se/Te H-bonds are 4.5 times as weak as the O-H...O ones. The addition of the second H2Z molecule into binary systems induces stronger complexes and causes a positive cooperative effect in ternary complexes. The blue shift of Csp2-H stretching frequency involving the Csp2-H...Z H-bond sharply increases when replacing one H atom in HCHO by a CH3 group. In contrast, when one H atom in HCHO is substituted with a halogen, the magnitude of blue-shifting of the Csp2-H...Z H-bond becomes smaller. The largest blue shift up to 92 cm-1 of Csp2-H stretching frequency in Csp2-H...O H-bond in CH3CHO...2H2O has rarely been observed and is much greater than that in the cases of the Csp2-H...S/Se/Te ones. The Csp2-H blue shift of Csp2-H...Z bonds in the halogenated aldehydes is converted into a red shift when H2O is replaced by a heavier analogue, such as H2S, H2Se, or H2Te. The stability and classification of nonconventional H-bonds including Csp2-H...Se/Te, Te-H...Te, and Se/Te-H...O have been established for the first time.
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Affiliation(s)
- Nguyen Thi Thanh Cuc
- Laboratory of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55100, Vietnam
| | - Cam-Tu Dang Phan
- Laboratory of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55100, Vietnam
| | - Nguyen Thi Ai Nhung
- Department of Chemistry, University of Sciences, Hue University, Hue 49000, Vietnam
| | | | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55100, Vietnam
| | - Vu Thi Ngan
- Laboratory of Computational Chemistry and Modelling (LCCM), Faculty of Natural Sciences, Quy Nhon University, Quy Nhon 55100, Vietnam
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90
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Luo S, Saadi A, Fu K, Taxipalati M, Deng L. Fabrication and characterization of dextran/zein hybrid electrospun fibers with tailored properties for controlled release of curcumin. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:6355-6367. [PMID: 33969891 DOI: 10.1002/jsfa.11306] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/30/2021] [Accepted: 05/10/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND In recent years, there has been considerable interest in the use of biopolymer electrospun nanofibers for various food applications due to the biocompatibility, biodegradability, and high loading capacity. Herein, we fabricated and characterized novel hybrid electrospun fibers from dextran (50%, w/v) and zein (0-30%, w/v) solutions, and the effects of various zein concentrations on the properties of the hybrid electrospun fibers were investigated. RESULTS When zein was added at low concentrations (5% and 10%), dextran and zein showed poor miscibility, as reflected by significantly decreased viscosity of the solutions, and the poor mechanical properties of the derived fiber membranes. When zein was added at medium concentrations (15-25%), hydrogen bonds were formed between dextran and zein molecules, as indicated by the red shift of Fourier-transform infrared bands and β-sheet to α-helix structural transformations. The fiber membranes electrospun from a solution with 25% zein showed the most hydrophobic surface, with a water contact angle of 116.9°. The homogenous dispersion of dextran and zein resulted in improved mechanical properties for fibers electrospun from a solution with 30% zein. Curcumin encapsulating dextran/zein electrospun fibers exhibited effective radical scavenging activity and ferric reducing power, along with the desired controlled release behavior for curcumin delivery. CONCLUSION Food grade dextran/zein hybrid electrospun fibers demonstrated tunable properties, and appear to be promising as delivery systems for bioactive and edible antimicrobial food packaging. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Shiyuan Luo
- College of Biological Science and Technology, Hubei Key Laboratory of Biological Resources Protection and Utilization, Key Laboratory of Green Manufacturing of Super-Light Elastomer Materials of State Ethnic Affairs Commission, Hubei Minzu University, Enshi, China
| | - Abdullah Saadi
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
| | - Kai Fu
- College of Biological Science and Technology, Hubei Key Laboratory of Biological Resources Protection and Utilization, Key Laboratory of Green Manufacturing of Super-Light Elastomer Materials of State Ethnic Affairs Commission, Hubei Minzu University, Enshi, China
| | - Maierhaba Taxipalati
- Department of Modern Agriculture, Turpan Vocational and Technical College, Turpan, China
| | - Lingli Deng
- College of Biological Science and Technology, Hubei Key Laboratory of Biological Resources Protection and Utilization, Key Laboratory of Green Manufacturing of Super-Light Elastomer Materials of State Ethnic Affairs Commission, Hubei Minzu University, Enshi, China
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91
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Fan Y, Luo H, Zhu C, Li W, Wu D, Wu H. Hydrophobic natural alcohols based deep eutectic solvents: Effective solvents for the extraction of quinine. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119112] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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92
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Patkar D, Ahirwar MB, Gadre SR, Deshmukh MM. Unusually Large Hydrogen-Bond Cooperativity in Hydrogen Fluoride Clusters, (HF) n, n = 3 to 8, Revealed by the Molecular Tailoring Approach. J Phys Chem A 2021; 125:8836-8845. [PMID: 34612647 DOI: 10.1021/acs.jpca.1c06478] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work, our recently proposed molecular tailoring approach (MTA)-based method is employed for the evaluation of individual hydrogen-bond (HB) energies in linear (L) and cyclic (C) hydrogen fluoride clusters, (HF)n (n = 3 to 8). The estimated individual HB energies calculated at the MP2(full)/aug-cc-pVTZ level for the L-(HF)n are between 6.2 to 9.5 kcal/mol and those in the C-(HF)n lie between 7.9 to 11.4 kcal/mol. The zero-point energy corrections and basis set superposition corrections are found to be very small (less than 0.6 and 1.2 kcal/mol, respectively). The cooperativity contribution toward individual HBs is seen to fall between 1.0 to 4.8 kcal/mol and 3.2 to 6.9 kcal/mol for linear and cyclic clusters, respectively. Interestingly, the HB energies in dimers, cleaved from these clusters, lie in a narrow range (4.4 to 5.2 kcal/mol) suggesting that the large HB strength in (HF)n clusters is mainly due to the large cooperativity contribution, especially for n ≥ 5 (50 to 62% of the HBs energy). Furthermore, the HB energies in these clusters show a good qualitative correlation with geometrical parameters (H···F distance and F-H···F angles), stretching frequencies of F-H bonds, and electron density values at the (3, -1) bond critical points.
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Affiliation(s)
- Deepak Patkar
- Department of Chemistry, Dr. Harisingh Gour Vishwavidyalaya, (A Central University), Sagar, 470003, India
| | - Mini Bharati Ahirwar
- Department of Chemistry, Dr. Harisingh Gour Vishwavidyalaya, (A Central University), Sagar, 470003, India
| | - Shridhar R Gadre
- Department of Scientific Computing, Modelling and Simulation, Savitribai Phule Pune University, Pune, 411 007, India
| | - Milind M Deshmukh
- Department of Chemistry, Dr. Harisingh Gour Vishwavidyalaya, (A Central University), Sagar, 470003, India
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93
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Roy S, Patra A, Palit DK, Mondal JA. Interaction of Zwitterionic Osmolyte Trimethylamine N-oxide (TMAO) with Molecular Hydrophobes: An Interplay of Hydrophobic and Electrostatic Interactions. J Phys Chem B 2021; 125:10939-10946. [PMID: 34570979 DOI: 10.1021/acs.jpcb.1c05694] [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
Interaction of trimethylamine N-oxide (TMAO) with charged/uncharged moieties of proteins and lipids is an important elementary step toward the multifaceted biofunctions of TMAO. Using minimum area Raman difference spectroscopy (MA-RDS) of aqueous TMAO (1.0 M) in the presence of deuterated molecular hydrophobes (e.g., deuterated tetramethylammonium cation (d-TMA+) and tert-butylalcohol (d-TBA)), we show that TMAO exhibits two distinct motifs of interaction with the cationic (d-TMA+) and uncharged (d-TBA) hydrophobes. Specifically, the trimethylammonium moiety of TMAO undergoes van der Waals attraction with the tert-butyl group of d-TBA, which is governed by their mutual hydrophobic interaction with water. This makes their methyl groups less exposed to water. In contrast, for the cationic hydrophobe (d-TMA+), TMAO interacts electrostatically via its negatively charged-oxygen, which in turn orients the TMAO-methyls away from the hydrophobe (d-TMA+), keeping them exposed to water.
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Affiliation(s)
- Subhadip Roy
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Homi Bhabha National Institute, Trombay, Mumbai 400085, India
| | - Animesh Patra
- School of Chemistry, Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Santacruz (E), Mumbai 400098, India
| | - Dipak K Palit
- School of Chemistry, Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Santacruz (E), Mumbai 400098, India
| | - Jahur Alam Mondal
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Homi Bhabha National Institute, Trombay, Mumbai 400085, India
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94
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Mazumder A, Chakraborty P, Sen D, Bhattacharjee C. Separation of trace naphthalene dissolved in wastewater using microemulsion based liquid extractant followed by its detection through UV-photometric method. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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95
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Yusof R, Jumbri K, Abdul Rahman MB. An insight into the effects of ratios and temperatures on a tetrabutylammonium bromide and ethylene glycol deep eutectic solvent. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116709] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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96
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Theoretical investigation on the improper hydrogen bond in κ-carrabiose⋯Y (Y = HF, HCl, HBr, NH 3, H 2O, and H 2S) complexes. J Mol Model 2021; 27:292. [PMID: 34546413 DOI: 10.1007/s00894-021-04904-z] [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: 06/24/2021] [Accepted: 09/07/2021] [Indexed: 10/20/2022]
Abstract
The nature of H-bonds in κ-carrabiose⋯Y (Y = HF, HCl, HBr, NH3, H2O, and H2S) complexes was studied. For this aim, the structure of isolated κ-carrabiose was optimized using three global hybrids functional: B3LYP, PBE0, and M06-2X combined with 6-311G** basis set. Subsequently, the κ-carrabiose in the presence of HF, HCl, HBr, NH3, H2O, and H2S was optimized using the CBS-4 M method. NBO analyses were then carried out at the MP2/6-311G** level of theory. A particular interest was focused on C(18)-H(34)⋯Y bond. The results reveal that the C(18)-H(34)⋯Y bond is an improper H-bond since a significant contraction of C(18)-H(34) was observed during the complexation leading to a significant blueshifted stretching frequency. The NBO analyses have shown that the formation of the improper H-bonds C(18)-H(34)⋯Y (Y = F, Cl, Br, N, O, and S) is principally due to the increase of the s-character of the hybrid orbital in carbon atom (rehybridization) in κ-carrabiose⋯Y complexes. Regarding the polarization, it was proved that more the H-bond center (carbon in C(18)-H(34)⋯Y) becomes less positive, the hydrogen more positive, and Y more negative; more the contraction of the C(18)-H(34) bond is important. It was also confirmed for intramolecular H-bonds in κ-carrabiose⋯Y complexes that the rehybridization is responsible for H-bonds nature either proper or improper.
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97
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Ahirwar MB, Patkar D, Yadav I, Deshmukh MM. Appraisal of individual hydrogen bond strengths and cooperativity in ammonia clusters via a molecular tailoring approach. Phys Chem Chem Phys 2021; 23:17224-17231. [PMID: 34369546 DOI: 10.1039/d1cp02839a] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, we propose and test a method, based on the molecular tailoring approach (MTA), for the evaluation of individual hydrogen bond (HB) energies in ammonia (NH3)n clusters. This methodology was tested, in our earlier work, on water clusters. Liquid ammonia being a universal, non-aqueous ionizing solvent, such information of individual HB strength is indispensable in many studies. The estimated HB energies by an MTA-based method, in (NH3)n for n = 3-8, were calculated to be in the range of 0.65 to 5.54 kcal mol-1 with the cooperativity contribution falling between -0.54 and 1.88 kcal mol-1 both calculated at the MP2(full)/aug-cc-pVTZ level of theory. It is seen that the strong HBs in (NH3)n clusters were additionally strengthened by the large contribution of HB cooperativity. The accuracy of these estimated HB energies was validated by approximately estimating the molecular energy of a given cluster by adding the sum of HB energies to the sum of monomer energies. This approximately estimated molecular energy of a given cluster was found to be in excellent agreement with the actual calculated values. The negligibly small difference (less than 5.6 kcal mol-1) in these two values suggests that the estimated individual HB energies in ammonia clusters are quite reliable. Furthermore, these estimated HB energies by MTA are in excellent qualitative agreement with the other indirect measures of HB strength, such as HB bond distances and angles, N-H stretching frequency and the electron density values at the (3,-1) bond critical points.
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Affiliation(s)
- Mini Bharati Ahirwar
- Department of Chemistry, Dr Harisingh Gour Vishwavidyalaya, (A Central University), Sagar, 470003, India.
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98
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Wang TH, Wang WX, Chang HC. Pressure-Dependent Clustering in Ionic-Liquid-Poly (Vinylidene Fluoride) Mixtures: An Infrared Spectroscopic Study. NANOMATERIALS 2021; 11:nano11082099. [PMID: 34443929 PMCID: PMC8400791 DOI: 10.3390/nano11082099] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/11/2021] [Accepted: 08/17/2021] [Indexed: 12/03/2022]
Abstract
The nanostructures of ionic liquids (ILs) have been the focus of considerable research attention in recent years. Nevertheless, the nanoscale structures of ILs in the presence of polymers have not been described in detail at present. In this study, nanostructures of ILs disturbed by poly(vinylidene fluoride) (PVdF) were investigated via high-pressure infrared spectra. For 1-(2-hydroxyethyl)-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([HEMIm][TFSI])-PVdF mixtures, non-monotonic frequency shifts of the C4,5-H vibrations upon dilution were observed under ambient pressure. The experimental results suggest the presence of microheterogeneity in the [HEMIm][TFSI] systems. Upon compression, PVdF further influenced the local structure of C4,5–H via pressure-enhanced IL–PVdF interactions; however, the local structures of C2–H and hydrogen-bonded O–H were not affected by PVdF under high pressures. For choline [TFSI]–PVdF mixtures, PVdF may disturb the local structures of hydrogen-bonded O–H. In the absence of the C4,5–H⋯anion and C2–H⋯anion in choline [TFSI]–PVdF mixtures, the O–H group becomes a favorable moiety for pressure-enhanced IL–PVdF interactions. Our results indicate the potential of high-pressure application for designing pressure-dependent electronic switches based on the possible changes in the microheterogeneity and electrical conductivity in IL-PVdF systems under various pressures.
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Affiliation(s)
| | | | - Hai-Chou Chang
- Correspondence: ; Tel.: +886-3-8903585; Fax: +886-3-8900162
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Kabadi EM, Khire SS, Pingale SS, Gadre SR, Chiba T, Fujji A. Theoretical and experimental study of IR spectra of large phenol-acetylene clusters, Ph(Ac)n for 8 ≤ n ≤ 12. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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100
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Zheng YZ, Chen H, Zhou Y, Zhang YC. Combination of FTIR and DFT to study the structure and hydrogen-bond properties of alkylammonium-based ILs and DMSO mixtures. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115940] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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