On account of their potential possibility of being used as an ion exchanger the diaryliodine(Ⅲ) salts have attracted our attention.A lot of scientific reports concerning these compounds have been found in literature,...On account of their potential possibility of being used as an ion exchanger the diaryliodine(Ⅲ) salts have attracted our attention.A lot of scientific reports concerning these compounds have been found in literature, but had been hardly touching the thought of the possibility.Some of their basic physico-chemical characteristics are still not reported. In this paper we have studied the effect of water in the iodoniumforming reaction with(IO)2SO4.It has been shown that the overoxidization will be slighter and the productive rate of iodonium salts will be higher when the ratio H2SO4:H2O (in moles) equals approximately 2.7:1.The experiment shows that chloroform and 1, 2-dichloroethane as well as tetrachloromathane have no apparent influence for the iodonium forming reaction and the resulting productive rate. At the same time we synthesized thirty-five species of simple iodinium halides and determined their solubilities in water.The experimental results have shown that the halides get the more deeply colour and the solubilities of the halides apparently decrease in the series of Cl^--Br^--I^- and hydrocarbon-halgen-oxygroup substituted group at the benzen cycle. All of these phenomena reflect the change of chemical bond between R2I^+-X-and may be a useful indication in the synthesis of such a kind of ion exchanger.展开更多
Growth of Chlorella marine, Nannochloropsis oculata, Pyramidomonas sp, Platymonas subcordiformis and Phaeodactylum tricornutum exposed to monochlorobezene (MCB), 1, 2-dichlorobenzene (1, 2-DCB), 1, 2, 3, 4-tetrachloro...Growth of Chlorella marine, Nannochloropsis oculata, Pyramidomonas sp, Platymonas subcordiformis and Phaeodactylum tricornutum exposed to monochlorobezene (MCB), 1, 2-dichlorobenzene (1, 2-DCB), 1, 2, 3, 4-tetrachlorobenzene (1, 2, 3, 4-TeCB) and pentachlorobenzene (PeCB) was tested. Tests of 72 h-EC50 values showed that the toxicity ranged in the order: MCB<1,2-DCB<1,2,3,4-TeCB<PeCB,and that toxjcity of chlorinated benzene (CB) alone to marine algae was almost in the order: Pyramidomonas sp.< Platymonas subcordiformis<Nannochloropsis oculata < Chlorella marine< Phaeodactylum tricomutum. Study of the QSAR (Quantitative Structure-Activity Relationship) between Kow and toxicity of CBs to marine algae showed good relationships between-logEC50 and logKow.展开更多
文摘On account of their potential possibility of being used as an ion exchanger the diaryliodine(Ⅲ) salts have attracted our attention.A lot of scientific reports concerning these compounds have been found in literature, but had been hardly touching the thought of the possibility.Some of their basic physico-chemical characteristics are still not reported. In this paper we have studied the effect of water in the iodoniumforming reaction with(IO)2SO4.It has been shown that the overoxidization will be slighter and the productive rate of iodonium salts will be higher when the ratio H2SO4:H2O (in moles) equals approximately 2.7:1.The experiment shows that chloroform and 1, 2-dichloroethane as well as tetrachloromathane have no apparent influence for the iodonium forming reaction and the resulting productive rate. At the same time we synthesized thirty-five species of simple iodinium halides and determined their solubilities in water.The experimental results have shown that the halides get the more deeply colour and the solubilities of the halides apparently decrease in the series of Cl^--Br^--I^- and hydrocarbon-halgen-oxygroup substituted group at the benzen cycle. All of these phenomena reflect the change of chemical bond between R2I^+-X-and may be a useful indication in the synthesis of such a kind of ion exchanger.
文摘Growth of Chlorella marine, Nannochloropsis oculata, Pyramidomonas sp, Platymonas subcordiformis and Phaeodactylum tricornutum exposed to monochlorobezene (MCB), 1, 2-dichlorobenzene (1, 2-DCB), 1, 2, 3, 4-tetrachlorobenzene (1, 2, 3, 4-TeCB) and pentachlorobenzene (PeCB) was tested. Tests of 72 h-EC50 values showed that the toxicity ranged in the order: MCB<1,2-DCB<1,2,3,4-TeCB<PeCB,and that toxjcity of chlorinated benzene (CB) alone to marine algae was almost in the order: Pyramidomonas sp.< Platymonas subcordiformis<Nannochloropsis oculata < Chlorella marine< Phaeodactylum tricomutum. Study of the QSAR (Quantitative Structure-Activity Relationship) between Kow and toxicity of CBs to marine algae showed good relationships between-logEC50 and logKow.
