Fourier transform infrared spectral study of N,N′-dimethylformamide-water-rhodamine 6G mixture

Sharma, Amit; Kaur, Sarvpreet; Mahajan, Chakraverti; Tripathi, S. K.; Saini, G. S. S.

doi:10.1080/00268970601146856

Cited by 34 publications

(10 citation statements)

References 36 publications

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“…The shift at 2931 cm -1 is due to symmetric methyl C-H bond stretching in membrane with DMF [46]. It is attributed to the presence of residual solvent [47]. While the peaks in the region of 2839 and 2931 cm -1 of membranes with cosolvent system are due to the presence of C-H stretching vibrations of THF [48].…”

Section: Resultsmentioning

confidence: 93%

Polymer Concentration and Solvent Variation Correlation with the Morphology and Water Filtration Analysis of Polyether Sulfone Microfiltration Membrane

Alvi¹,

Khalid²,

Ahmad

et al. 2019

Advances in Polymer Technology

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Microfiltration flat sheet membranes of polyether sulfone (PES) were fabricated by incorporating varying concentrations of polymer and investigated the influence of substituting solvents. The membranes were prepared via immersion precipitation method. Different solvents that included NMP (N-methyl-2-pyrrolidone), DMF (dimethylformamide), and THF (tetrahydrofuran) were used to analyse their effect on the performance and morphology of the prepared membranes. Two different coagulation bath temperatures were used to investigate the kinetics of membrane formation and subsequent effect on membrane performance. The maximum water flux of 141 ml/cm2.h was observed using 21% of PES concentration in NMP + THF cosolvent system. The highest tensile strength of 29.15 MPa was observed using membrane prepared with 21% PES concentration in NMP as solvent and coagulation bath temperature of 25°C. The highest hydraulic membrane resistance was reported for membrane prepared with 21% PES concentration in NMP as solvent. Moreover, the lowest contact angle of 67° was observed for membrane prepared with 15% of PES concentration in NMP as solvent with coagulation bath temperature of 28°C. Furthermore, the Hansen solubility parameter was used to study the effect on the thermodynamics of membrane formation and found to be in good correlation with experimental observation and approach in the present work.

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Section: Resultsmentioning

confidence: 93%

Polymer Concentration and Solvent Variation Correlation with the Morphology and Water Filtration Analysis of Polyether Sulfone Microfiltration Membrane

Alvi¹,

Khalid²,

Ahmad

et al. 2019

Advances in Polymer Technology

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“…Likewise, the peaks located near 816, 746, and 653 cm −1 confirmed Zn-O stretching modes. IR bands at 1502, 1294, and 653 cm −1 indicated a random dimethyl formamide (DMF) distribution in the MOF-5 framework structure 44 . The band located at 3607 cm −1 indicated adsorbed water molecules.…”

Section: Resultsmentioning

confidence: 99%

Metal organic frameworks as sorption media for volatile and semi-volatile organic compounds at ambient conditions

Vellingiri

Szulejko

Kumar

et al. 2016

Sci Rep

144

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In this research, we investigated the sorptive behavior of a mixture of 14 volatile and semi-volatile organic compounds (four aromatic hydrocarbons (benzene, toluene, p-xylene, and styrene), six C2-C5 volatile fatty acids (VFAs), two phenols, and two indoles) against three metal-organic frameworks (MOFs), i.e., MOF-5, Eu-MOF, and MOF-199 at 5 to 10 mPa VOC partial pressures (25 °C). The selected MOFs exhibited the strongest affinity for semi-volatile (polar) VOC molecules (skatole), whereas the weakest affinity toward was volatile (non-polar) VOC molecules (i.e., benzene). Our experimental results were also supported through simulation analysis in which polar molecules were bound most strongly to MOF-199, reflecting the presence of strong interactions of Cu2+ with polar VOCs. In addition, the performance of selected MOFs was compared to three well-known commercial sorbents (Tenax TA, Carbopack X, and Carboxen 1000) under the same conditions. The estimated equilibrium adsorption capacity (mg.g−1) for the all target VOCs was in the order of; MOF-199 (71.7) >Carboxen-1000 (68.4) >Eu-MOF (27.9) >Carbopack X (24.3) >MOF-5 (12.7) >Tenax TA (10.6). Hopefully, outcome of this study are expected to open a new corridor to expand the practical application of MOFs for the treatment diverse VOC mixtures.

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“…54 Raman spectra were recorded with a Bruker MultiRAM spectrometer equipped with a Nd:YAG laser (1064 nm) and an InGaAs detector (4000–70 cm −1 ). 55 Band assignments for 1 were made using the IR spectra of DMF 56 and metal trifluoroacetates, 57 for 2 additionally of trifluoroacetic acid 35 and trifluoroacetic acid esters 58 and for 3 of pentafluoropropionic acid 59 and some of its esters. 60…”

Section: Methodsmentioning

confidence: 99%

Oxidation of europium with ammonium perfluorocarboxylates in liquid ammonia: pathways to europium(ii) carboxylates and hexanuclear europium(iii) fluoridocarboxylate complexes

et al. 2022

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Fourier transform infrared spectral study of N,N′-dimethylformamide-water-rhodamine 6G mixture

Cited by 34 publications

References 36 publications

Polymer Concentration and Solvent Variation Correlation with the Morphology and Water Filtration Analysis of Polyether Sulfone Microfiltration Membrane

Polymer Concentration and Solvent Variation Correlation with the Morphology and Water Filtration Analysis of Polyether Sulfone Microfiltration Membrane

Metal organic frameworks as sorption media for volatile and semi-volatile organic compounds at ambient conditions

Oxidation of europium with ammonium perfluorocarboxylates in liquid ammonia: pathways to europium(ii) carboxylates and hexanuclear europium(iii) fluoridocarboxylate complexes

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