The reaction of β-diketophosphazene with the europium (III) salt synthesized the corresponding metal complex which was structured with (3-aminopropyl)triethoxysilane and treated with dibenzoylmethane for additional coordination of europium atoms. The polymer thus obtained exhibits luminescence with a maximum of 615 nm, which is characteristic of europium. The polymer is thermally stable up to 300 °C, the coating based on it has a contact angle of 101°, and the adhesive strength of the coating to non-finished glass (according to ISO 2409: 2013) is 1 point.
Possibility of mechanochemical synthesis of water-soluble complexes from Siberian-larch arabinogalactan and poorly soluble herbicide chlorsulfuron was examined, their molecular dynamics was analyzed by the NMR method, and their stability and herbicide activity were compared with those of the starting substances.Recently, main researchers' efforts in the fi eld of plant protection have been aimed to develop new pesticide preparations providing more effective utilization of the potential of an active substance. Promising in this regard is the mechanochemical method for control over physicochemical, technological, and physiological properties of pesticides because of making possible synthesis of products in a single technological stage without solvents. In agriculture, plant protection from weeds widely uses a selective herbicide chlorosulfuron [1-(2-chlorophenyl sulfonyl)-3-(4-methoxy-6-methyl-1,3,5-triazin-2-yl)urea] (CST) [1,2]. An important disadvantage hindering the application of this herbicide is its poor solubility in water. It is known that many biologically active substances insoluble or poorly soluble in water become water-soluble upon immobilization on a biopolymer [3][4][5]. The biogenic polymer arabinogalactan (CST) possesses unique properties: water-solubility, high and diverse biological activity, nontoxicity, and biodegradation capacity [5][6][7][8]. Therefore, AG can be regarded as a promising matrix for synthesis of new chemical structures and development of broad-spectrum herbicide preparations. Application of pesticide of this kind in agriculture is an exceedingly topical issue because these compounds can possess not only by an increased herbicidal activity, but also be lowtoxic, biodegradable, and highly water-soluble.The goal of our study was to examine the possibility of mechanochemical synthesis of water-soluble complexes of CST with AG, analyze the effect of synthesis conditions on some physicochemical properties of the reaction products, and determine their physiological activity.
EXPERIMENTALWe used in our experiments AG with a molecular mass of 30 300, isolated by aqueous extraction from Siberianlarch wood [9]. Technical-grade AG of 95% purity was used without additional purifi cation. Thermograms were measured on a MOM derivatograph-C (Hungary) up to a temperature of 250°C at a heating rate of 5 deg min -1 in a platinum crucible in the air.UV spectra of solutions were obtained in quartz cuvettes on a UV-VIS Specord M-4 spectrophotometer in the spectral range 220-330 nm; IR spectra, on a Shimadzu spectrophotometer in the spectral range 700-3600 cm -1 in Vaseline oil; and 1H NMR spectra in solution, on a Bruker AMX-300 spectrometer at
The aryloxyphosphazenes containing carboxylic groups in phosphorus-linked radicals and capable of copolymerization with acrylic binders were used as modifiers of dental polymer compositions. Filled modified dental compositions have been obtained and tested. It has been shown that the best mechanical and physicochemical parameters are exhibited by cured compositions with a modifier based on aryloxyphosphazene with 4-hydroxycinnamic and eugenol radicals in the phosphazene ring.
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