Reduced rate constants of photoinduced electron transfer in intramolecular fluorescence quenching of donor-acceptor podands induced by cation-complexation are observed in the highly exothermic reactions.
A new ligand 25, 26, 27, 28-tetrakis[2-(o-methoxyphenoxy)ethoxy]calix[4]arene 3 was synthesized by direct base-strength-driven O-alkylation of calix[4]arene 1. 3 has been used as ionophore for cesium selective PVC mem...A new ligand 25, 26, 27, 28-tetrakis[2-(o-methoxyphenoxy)ethoxy]calix[4]arene 3 was synthesized by direct base-strength-driven O-alkylation of calix[4]arene 1. 3 has been used as ionophore for cesium selective PVC membrane electrode. The extraction for cesium and sodium with 3 have been also studied.展开更多
Two new amide type podands L 1 and L 2(L 1=1,1,1 tris{[(2 benzylaminoformyl)phenoxyl]methyl}propane, L 2=1,3,5 trimethyl 2,4,6 tris{[(2 benzylaminoformyl)phenoxyl]methyl}benzene) and their europium and terbi...Two new amide type podands L 1 and L 2(L 1=1,1,1 tris{[(2 benzylaminoformyl)phenoxyl]methyl}propane, L 2=1,3,5 trimethyl 2,4,6 tris{[(2 benzylaminoformyl)phenoxyl]methyl}benzene) and their europium and terbium nitrates complexes were synthesized. The luminescence properties of these complexes were also studied.展开更多
A process for actinide(Ⅲ)and lanthanum(Ⅲ)extraction separation from high-level liquid waste(HLLW)was proposed,with N,N,N’,N’-tetraoctyl diglycolamide(TODGA)as the extractant,tri-n–butyl phosphate(TBP)as the phase...A process for actinide(Ⅲ)and lanthanum(Ⅲ)extraction separation from high-level liquid waste(HLLW)was proposed,with N,N,N’,N’-tetraoctyl diglycolamide(TODGA)as the extractant,tri-n–butyl phosphate(TBP)as the phase modifier and 2,6-bis[1-(propan-1-ol)-1,2,3-triazol-4-yl]pyridine(PyTri-Diol or PTD)as hydrophilic stripping agent.This‘hot test’was successfully carried out,achieving 99.92%removal of americium-241(^(241)Am)with a separation factor SF(Eu/Am)of 3.8×10^(3)in the actinide(Ⅲ)product solution.The results show that bisamide podand extractants can effectively realize the extraction and separation of actinide(Ⅲ)and lanthanum(Ⅲ)from Chinese commercial HLLW and thus have a bright practical application potential for the treatment of commercial HLLW.展开更多
The extraction of Zr(Ⅳ) from nitric acid solution with amido polands PAⅡ、PAⅤ [1] was studied.The effects of the concentration of Zr(Ⅳ) and HNO 3,salting out agent(NaNO 3) and extractant on the distribution ratios...The extraction of Zr(Ⅳ) from nitric acid solution with amido polands PAⅡ、PAⅤ [1] was studied.The effects of the concentration of Zr(Ⅳ) and HNO 3,salting out agent(NaNO 3) and extractant on the distribution ratios were observed,the results show that the extractant PAⅡ is satisfactory for the extraction of Zr(Ⅳ) but there appears a serious emergence of third phase when the concentration of salting out agent and the rate of the concentration of the extractant/Zr(Ⅳ) is over some range and PAⅤ is of disadvantage on the extraction of Zr(Ⅳ).展开更多
New podand compound 1,2 bis (8′ quinolyloxy ethoxy) benzene (BQEB) was prepared. A lanthanum adduct with BQEB was synthesized and its structure was characterized by X ray crystal analysis using Mo Kα radiation ( ...New podand compound 1,2 bis (8′ quinolyloxy ethoxy) benzene (BQEB) was prepared. A lanthanum adduct with BQEB was synthesized and its structure was characterized by X ray crystal analysis using Mo Kα radiation ( λ =0 071073 nm). Crystal data: space group C2/c, Z=4, a =1 8636(3) nm, b =2 0036(3) nm, c =1 5186(3) nm, α =90 00°, β =91 452(14)°, γ =90 00°, R f=0 0373 for 6520 observed data. In the crystal structure the La 3+ is ten coordinated by three NO - 3 and four H 2O. Two podand molecules link to the coordination core via O—H…N (average O…N=0 2766(3) nm) hydrogen bonds. The adduct has a one dimensional chain sandwich structure consisting of every two podand molecules with a [La(NO 3) 3·4H 2O] as a bridge. The whole crystal is packed in a manner of…LLMLLMLL….展开更多
基金We are grateful to the National NatUral Science Foundation of China for support this work.!(grantNO. 29733100)
文摘Reduced rate constants of photoinduced electron transfer in intramolecular fluorescence quenching of donor-acceptor podands induced by cation-complexation are observed in the highly exothermic reactions.
文摘A new ligand 25, 26, 27, 28-tetrakis[2-(o-methoxyphenoxy)ethoxy]calix[4]arene 3 was synthesized by direct base-strength-driven O-alkylation of calix[4]arene 1. 3 has been used as ionophore for cesium selective PVC membrane electrode. The extraction for cesium and sodium with 3 have been also studied.
文摘Two new amide type podands L 1 and L 2(L 1=1,1,1 tris{[(2 benzylaminoformyl)phenoxyl]methyl}propane, L 2=1,3,5 trimethyl 2,4,6 tris{[(2 benzylaminoformyl)phenoxyl]methyl}benzene) and their europium and terbium nitrates complexes were synthesized. The luminescence properties of these complexes were also studied.
文摘A process for actinide(Ⅲ)and lanthanum(Ⅲ)extraction separation from high-level liquid waste(HLLW)was proposed,with N,N,N’,N’-tetraoctyl diglycolamide(TODGA)as the extractant,tri-n–butyl phosphate(TBP)as the phase modifier and 2,6-bis[1-(propan-1-ol)-1,2,3-triazol-4-yl]pyridine(PyTri-Diol or PTD)as hydrophilic stripping agent.This‘hot test’was successfully carried out,achieving 99.92%removal of americium-241(^(241)Am)with a separation factor SF(Eu/Am)of 3.8×10^(3)in the actinide(Ⅲ)product solution.The results show that bisamide podand extractants can effectively realize the extraction and separation of actinide(Ⅲ)and lanthanum(Ⅲ)from Chinese commercial HLLW and thus have a bright practical application potential for the treatment of commercial HLLW.
文摘The extraction of Zr(Ⅳ) from nitric acid solution with amido polands PAⅡ、PAⅤ [1] was studied.The effects of the concentration of Zr(Ⅳ) and HNO 3,salting out agent(NaNO 3) and extractant on the distribution ratios were observed,the results show that the extractant PAⅡ is satisfactory for the extraction of Zr(Ⅳ) but there appears a serious emergence of third phase when the concentration of salting out agent and the rate of the concentration of the extractant/Zr(Ⅳ) is over some range and PAⅤ is of disadvantage on the extraction of Zr(Ⅳ).
文摘New podand compound 1,2 bis (8′ quinolyloxy ethoxy) benzene (BQEB) was prepared. A lanthanum adduct with BQEB was synthesized and its structure was characterized by X ray crystal analysis using Mo Kα radiation ( λ =0 071073 nm). Crystal data: space group C2/c, Z=4, a =1 8636(3) nm, b =2 0036(3) nm, c =1 5186(3) nm, α =90 00°, β =91 452(14)°, γ =90 00°, R f=0 0373 for 6520 observed data. In the crystal structure the La 3+ is ten coordinated by three NO - 3 and four H 2O. Two podand molecules link to the coordination core via O—H…N (average O…N=0 2766(3) nm) hydrogen bonds. The adduct has a one dimensional chain sandwich structure consisting of every two podand molecules with a [La(NO 3) 3·4H 2O] as a bridge. The whole crystal is packed in a manner of…LLMLLMLL….
