Condensation of chloromethanes and their binary systems with triphenylphosphine induced by low‐voltage discharges

Abstract

Solid structures of different shapes, hydrogen chloride, and a small number of liquid products are formed from chloromethanes (CH2Cl2 and CHCl3) and binary systems with triphenylphosphine (CH2Cl2 + PPh3, CHCl3 + PPh3, and CCl4 + PPh3) under the action of a liquid‐phase low‐voltage discharge (60‐V DC). It is observed that triphenylphosphine additives sharply increase the reactivity of CCl4. Besides, a quantum chemical simulation of chloromethane transformation mechanism in the binary systems with triphenylphosphine is conducted, together with the likely mechanism of chloromethane conversion into active particles under the action of a liquid‐phase low‐voltage pulsed discharge.

Synthesis of Decorated Carbon Structures with Encapsulated Components by Low-Voltage Electric Discharge Treatment

“…The effect of triphenylphosphine is especially pronounced during the polycondensation of CCl 4 . Without the "predischarge" activation of PPh 3 , tetrachloromethane is transformed very slowly [26]. In the presence of PPh 3 (9 wt %), the conversion of the CCl 4 + PPh 3 binary system by the discharge treatment reaches 71 wt % in 20 min.…”

“…Binary systems are donor-acceptor complexes in which one of the chloromethane chlorine atoms is replaced with triphenylphosphine to form a P-C bond [26]. The formation of a binary system of di-, tri-, or tetrachloromethane with PPh 3 under the action of low-voltage pulsed discharge can be represented as a S n 2 process (reaction (1)).…”

“…As shown in [31][32][33], molecules undergo self-organization and nanotubes not only retain both simple and complex substances inside them, but also are aligned into chains (peapods), The spectrum given in Table 5 shows that there are several routes of dichloromethane transformation by the action of low-voltage discharge. In the formation of trichloromethane, the dichloromethane molecule is involved in two states, triplet and singlet [26]. Chloromethanes are partially transformed into the triplet state by low-voltage discharge treatment according to scheme 1 (reaction ( 2)).…”

“…Thus, the polycondensation induced by low-voltage discharges involves donor-acceptor complexes of substrates with triphenylphosphine, rather than individual chloromethanes. Preliminary results on the activating effect of triphenylphosphine on substrates are reported in [26,27].…”

Influence of low-voltage discharge energy on the morphology of carbon nanostructures in induced benzene transformation

“…35 The method developed by the authors for inducing reactions by low-voltage electric discharges in the liquid phase is used for the synthesis of carbon structures, functional nanomaterials, and the processing of toxic compounds. [36][37][38] Benzene is one of the best precursors for carbon nanostructures because aromatic and polyaromatic molecules are well carbonized. [39][40][41] The process parameters strongly affect the size, structure, and purity of the carbon structures.…”