- A phosphonate coordination polymer with highly sensitive detection of ascorbic acid and the proton conductivity of its polymer composites
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A phosphonate coordination polymer, [Cd(H3bmpa)2]n (1), based on Cd2+ ions and H4bmpa (H4bmpa = N-Benzyliminobis(methylenephosphonicacid)) was synthesized under hydrothermal conditions. It is characterized by single crystal X-ray diffraction, PXRD and TGA. Crystal structure indicates that adjacent Cd2+ ions are linked by oxygen atoms in the phosphonate groups to form a 1D chain structure. Adjacent 1D chains are further linked by hydrogen bonds to form a 2D planar structure. Complex 1 is a bifunctional material that has both fluorescent and proton conducting properties. It can detect ascorbic acid sensitively and selectively with a detection limit of 5 μM. To further improve the proton conductivity of Complex 1, PVA (Polyvinyl alcohol) was introduced with it to prepare the composites. The proton conductivity of 1?PVA-10 is 3.05 × 10?5 S·cm?1 (323 K, 98% RH), which is two orders of magnitude higher than that of coordination polymer.
- Liu, Xue-Ting,Lin, Tian,Zhang, Chen-Xi,Wang, Qing-Lun
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- Synthesis and crystal structure of phosphonic acid and bisphosphoramidate derivatives: QSAR studies of their anti-fungal potential on Macrophomina Phaseolina (Tassi) Goid
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A series of phosphonic acid and bisphosphoramidate derivatives were synthesized and characterized. The bioactivities against the fungal pathogen Macrophomina phaseolina and human acetylcholinesterase AChE enzyme were studied using QSAR based on multiple linear regression. L17, with (p-Cl–C6H4–NH) (p-Cl–C6H4)C(H)P(O)(OC2H5)2 skeleton, demonstrated a great mortality on the M. phaseolina mycelial growth by 83% inhibition at 150 mg/L; the other tested derivative showed moderate to weak antifungal activity against the fungus. QSAR model based on the GA-MLR method revealed the importance of 3D descriptors (De, Mor18e, H8m, and Mor30p) on the antifungal activity. It showed good capability in predicting the fungicidal activity of the studied molecules. Another derivative, L5, with (m-CH3–NC5H4–NH)(m-CH3–C6H4)C(H)P(O)(OCH3)2 skeleton displays the most potent anti-AChE activity. The electronic parameters, ΔEL-H, and ELUMO, have the highest contribution of human AChE. The authors suggest that these models could be usefully employed in designing more effective crop protection compounds without side effects on non-target organisms.
- Gholivand, Khodayar,Abbod, Mohsen,Ebrahimi Valmoozi, Ali Asghar,Barzegar, Omolbanin,Nasrollah Tabar, Hadis,Yaghoubi, Rouhollah,Hosseini, Mahdieh,Safaie, Naser,Rahimzadeh Dashtaki, Maryam,Dusek, Michal,Mani-Varnosfaderani, Ahmad
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p. 1591 - 1606
(2021/01/07)
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- Benzylamine-N,N-dimethylene phosphonate melamine salt and preparation method and application thereof
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The invention discloses a benzylamine-N,N-dimethylene phosphonate melamine salt and a preparation method and application thereof. A reaction ratio, by a molar ratio, of benzylamine-N,N-dimethylene phosphonic acid to melamine is 1.0:1.0-5.0, and the benzylamine-N,N-dimethylene phosphonic acid is prepared by reaction of benzylamine, formaldehyde and phosphorous acid according to a molar ratio of 0.5-1.5:1.0-5.0:1.0-5.0. The preparation method includes: respectively adding the benzylamine, the formaldehyde and the phosphorous acid, reacting, heating, refluxing, and respectively washing with dilute acid and water after reaction is finished, so that the benzylamine-N,N-dimethylene phosphonic acid is obtained; adding the benzylamine-N,N-dimethylene phosphonic acid and the melamine, then adding the deionized water and N,N-dimethylformamide, stirring, refluxing, cooling obtained products in ice-water bath after reaction is finished, carrying out suction filtration, washing with water, and drying to obtain white solid which is the benzylamine-N,N-dimethylene phosphonate melamine salt. The benzylamine-N,N-dimethylene phosphonate melamine salt has advantages of low smoke, low toxicity, freeness of corrosive gas, environment friendliness, high efficiency and the like and accords with the future flame retardant research and development direction.
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Paragraph 0021; 0024; 0027
(2016/12/22)
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- METHOD FOR THE SYNTHESIS OF ALPHA-AMINOALKYLENEPHOSPHONIC ACID
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The present invention is related to a new method for the synthesis of alpha-aminoalkylenephosphonic acid or its phosphonate esters comprising the steps of forming a reaction mixture by mixing a P-O-P anhydride moiety comprising compound, having one P-atom at the oxidation state (+111) and the other P-atom at the oxidation state (+111) or (+V), an aminoalkanecarboxylic acid and an acid catalyst, wherein said reaction mixture comprises an equivalent ratio of alpha-aminoalkylene carboxylic acid to P-O-P anhydride moieties of at least 0.2, and recovering the resulting alpha-aminoalkylene phosphonic acid compound or an ester thereof from the reaction mixture.
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Page/Page column 24
(2014/02/15)
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- Synthesis of bis- and tris-organophosphorus substituted amines and amino acids with PCH2N Fragments
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The aminomethylation of the derivatives of trivalent organophosphorus acids, containing PH and POSiMe3 fragments with various bis- and tris(alkoxymethyl)amines and bis(alkoxymethyl)amino acids, is proposed as a convenient method for the synthesis of new bis- and trisphosphorylated amines and amino acids as well as their derivatives with four and five coordinated phosphorus. Also the three-components systems of phosphorous acid, paraformaldehyde, and amines are thoroughly investigated via the treatment of reaction mixtures with bis(trimethylsilyl)amine.
- Prishchenko, Andrey A.,Livantsov, Mikhail V.,Novikova, Olga P.,Livantsova, Ludmila I.,Petrosyan, Valery S.
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p. 430 - 440
(2011/07/29)
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- NOVEL UNSYMMETRICAL N,N-BIS(METHYLENE)BIPHOSPHONIC ACIDS OF α,ω-DIAMINES. PREPARATION AND CHARACTERIZATION OF BIS(METHYLENE)>-BIPHOSPHONIC ACID AND BIS(METHYLENE)>-BIPHOSPHONIC ACID
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Reaction of ethylenediamine with phosphorous acid and formaldehyde in molar ratio 1:2:2 gives bis(methylene)>biphosphonic acid (2a) as the major product.Similarly, reaction of hexamethylenediamine with phosphorous acid and formaldehyde in molar ratio 1:2:2 yields bis(methylene)>biphosphonic acid (2b) which is isolated either as bis(methylene>biphosphonic acid (3b) or as bis(methylene)>biphosphonic acid (4b).Removal of the carbobenzoxy group with HBr 3b or the benzoyl group with HCl from 4b gives pure bis(methylene)>biphosphonic acid (2b).All compounds were characterized by 13C NMR, 31P NMR and elemental analysis.
- Redmore, Derek,Dhawan, Balram
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p. 233 - 238
(2007/10/02)
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