Atlas of IR Spectra of Organophosphorus Compounds

Shagidullin, R. R.; Чернова, А. В.; Vinogradova, V. S.; Mukhametov, F. S.; Pudovik, A. N.

doi:10.1007/978-94-011-3788-1

Cited by 32 publications

(28 citation statements)

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“…The IR frequencies and the assigned functional groups for the transmission and the ATR spectra of the TBT, are reported in Table 2. The assigned functional groups are in agreement with the literature [38][39][40][41][42][43]. Three spectral regions can be distinguished in the TBT spectra (figure 1):…”

Section: Transmission Ft-ir and Atr Spectrasupporting

confidence: 70%

Surface reactivity of tributyl thiophosphate: effects of temperature and mechanical stress

et al. 2006

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The surface reactivity of tributyl thiophosphate on iron surfaces has been studied in situ by attenuated total reflection Fouriertransform infrared spectroscopy, X-ray photoelectron spectroscopy and temperature-programmed reaction and desorption spectroscopies. The results show that at temperatures lower than 373 K the molecule forms a physisorbed layer on the iron substrate. At 373 K a reaction takes place with the formation of an organic layer, together with iron polyphosphate and sulfate. At higher temperatures temperature-programmed desorption results suggest that the mechanism involves P-O bond scission to yield butoxy groups. This could be preceded by P=S bond scission to give tributyl phosphite, which then, in turn, undergoes P-O bond scission to produce butoxy groups. The results obtained following tribological testing are in agreement with those of thermal tests: evidence of polyphosphate and sulfate formation is found.

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Section: Transmission Ft-ir and Atr Spectrasupporting

confidence: 70%

Surface reactivity of tributyl thiophosphate: effects of temperature and mechanical stress

et al. 2006

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“…acid. Weaker bands below 790 cm À1 have also been found, where bending vibrations as well as C-P stretches are located [21,29], meaning that the phosphorus might not be solely bonded via C-O-P linkage to the carbon atom of burnt cotton cellulose. The phosphoric acid group found in the IR spectra, indicative of polyphosphates, is in agreement with the P2p XPS results.…”

Section: Chemical Groups Present On the Char Surfacementioning

confidence: 93%

Characterization of chars obtained from cellulose treated with phosphoramidate flame retardants

Rupper

Gaan

Salimova

et al. 2010

Journal of Analytical and Applied Pyrolysis

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“…[19][20][21][22] A comparison of the spectrum of compound 1 with the spectra of compounds M and BPA shows that the IR spectrum of compound 1 retains a complicated system of intense bands in the ν(NH) region at 3000-3500 cm -1 , multiple bonds in the ν(СN) and δ(NH) region at ~1400-1700 cm -1 , and the phosphorus framework in the interval 950-1200 cm -1 . An analysis of the 4000-1400 cm -1 region containing the ОН, NH, and СН groups and the constituent bands and overtones showed that in the spectrum of compound 1, as compared to that of BPA, the specific pattern of several very broad, intense combined absorption bands 17, 19 disappeared in a region of ~3200-1400 cm -1 , in particular, the distinct peak involving 2γ(ОН) at ~2280 cm -1 , which is an im portant diagnostic property of the Р(О)ОН group form ing, as a rule, cyclic H dimers. 17, 22 At the same time, the spectra of both hydrated and anhydrous compound 1 contain the descending low frequency absorption wing ν(XH) in an interval of ~3000-2000 cm -1 , possibly indicating the appearance of a new structural fragment.…”

Section: Resultsmentioning

confidence: 97%

“…Therefore, the well known type of H bonds PO...H 2 O is observed in the given case. 19,22 The cleavage of coordination with the Н 2 О molecules during dehydration also affects the ν(СN) frequen cies, which is manifested in their high frequency shifts 1675 → 1700 cm -1 and 1499 → 1500 cm -1 . Thus, the Н 2 О molecules in the structure of melafen 1 are coordinated, being involved in complex formation with specific bonds and functional groups rather than being simple hydrate groups with a comparatively strong degree of freedom.…”

Section: Resultsmentioning

confidence: 99%

Supramolecular systems based on the melamine salt of bis(hydroxymethyl)phosphinic acid (melafen) dihydrate and surfactants

et al. 2008

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Bis(hydroxymethyl)phosphinic acid and melamine were shown by FTIR and UV spectroscopy to form the salt (melafen), whose cations and anions involving water molecules can be joined into supramolecular structures due to electrostatic interactions and hydrogen bonds. The conductometry, dielcometric titration, and dynamic light scattering methods showed that melafen in water and chloroform in a concentration range of 10 -10 -10 -4 mol L -1 involving the solvent structures exist as supramolecular polymeric nanostructures, whose size and properties change nonlinearly depending on the melafen concentration.The melamine salt of bis(hydroxymethyl)phosphinic acid dihydrate (melafen, 1) is an efficient regulator of plant growth and development, which is of considerable interest for practical use in agriculture and biotech nology. 1,2a The studies of the influence of compound 1 on the growth and energy processes in the living cell 3 and on the physicochemical state of biological membranes of various origin, 4 as well as the investigation of the mecha nism of action of the compound on the regulation of the plant cell metabolism 2b revealed that melafen is highly physiologically active at low concentrations, which are classified as low and superlow doses of biologically active substances. 5,6 The existing hypotheses for the mechanism of action of the superlow doses cannot completely explain the nature of this widespread phenomenon. 5,6 Therefore, the broad study of the effect of biologically active sub stances of the melafen type on systems of different levels of complexity and organization, namely, from supramo lecular systems modeling functions of biomolecules to complicated biological objects, seems especially urgent.Our first report is devoted to the study of the structure of melafen and its self association in aqueous and organic (chloroform) media. The interaction of melafen with surfactants of different nature and their micellar aggre gates modeling the components and surface layer of bio logical membranes will be discussed elsewhere. ExperimentalMelafen (1) was synthesized according to an earlier described procedure. 1 The association of compound 1, bis(hydroxymethyl) phosphinic acid (BPA), and melamine (M) in chloroform was studied by dielcometric titration, during which the concentration dependences of the dielectric permittivity (ε) were obtained and analyzed. 7-10 The dielectric permittivities of a series of solutions were determined on a setup consisting of an E12 I instrument operating in the beat mode and a measuring cell, being a tempera ture controlled condenser. Chloroform was purified using a stan dard method. 11 The estimation of the residual water content carried out by FTIR spectroscopy showed that the chloroform samples used contained ~0.1 wt.% water. The association of compound 1, BPA, and M in water was studied by the conductometric method, measur ing the change in the electric conductivity (χ) of the solutions at 25 °С (inoLab Cond Level 1 conductometer, relative measurement error 0.5%). Water and solu...

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Atlas of IR Spectra of Organophosphorus Compounds

Cited by 32 publications

References 0 publications

Surface reactivity of tributyl thiophosphate: effects of temperature and mechanical stress

Surface reactivity of tributyl thiophosphate: effects of temperature and mechanical stress

Characterization of chars obtained from cellulose treated with phosphoramidate flame retardants

Supramolecular systems based on the melamine salt of bis(hydroxymethyl)phosphinic acid (melafen) dihydrate and surfactants

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