A new selenidomercurate compound, namely(bmmim)2Hg(Se4)2(1, bmmim = 1-butyl-2,3-dimethylimidazolium), has been ionothermally synthesized by the reaction of HgSe, Sb and Se in a mixed solvent of the ionic liquid of(bmm...A new selenidomercurate compound, namely(bmmim)2Hg(Se4)2(1, bmmim = 1-butyl-2,3-dimethylimidazolium), has been ionothermally synthesized by the reaction of HgSe, Sb and Se in a mixed solvent of the ionic liquid of(bmmim)Cl and methylamine aqueous solution. The(bmmim)Cl acted as an efficient structure-directing agent(SDA) and reactive solvent in the formation of 1. Single-crystal X-ray diffraction study reveals that 1 crystallizes in the monoclinic space group C2/c with a = 17.9540(10), b = 10.8863(5), c = 16.4728(9)?, β = 110.024(2)°, V = 3025.0(3) ?3, Z = 4, D-1 c = 2.500 mg·m-3, F(000) = 2088, μ = 14.729 mm, R = 0.0186 and wR = 0.0503(I > 2σ(I)). The structure of compound 1 features a bamboo dragonfly-like anion unit of [Hg(Se4)2]2-in which the Hg atom binds to two(Se4)2-groups to form two five-membered rings. The thermal stability and optical property of compound 1 were also investigated.展开更多
The nuclear fuel cycle inevitably generates a large amount of radioactive waste liquid,which will pose a serious threat to the ecological environment and human health.Ion exchange method has received wide attention fo...The nuclear fuel cycle inevitably generates a large amount of radioactive waste liquid,which will pose a serious threat to the ecological environment and human health.Ion exchange method has received wide attention for its easy operation,low cost and no secondary pollution.However,the effective removal of radioactive ions from complex solutions still remains a serious challenge due to their environmental mobility and radiotoxicity.We have developed an efficient strategy to construct crystalline ion-exchange materials by inducing layered or three-dimensional microporous anionic frameworks by organic cations that can be effectively exchanged by radioactive metal ions.This type of materials can be applied effectively to the removal of radioactive ions from complex solutions and the removal mechanism has been deeply clarified by means of single crystal structure analyses,theoretical calculations,etc.This review summarizes our recent progress in the study of synthesis,structures and properties of radioactive ion removals for such type of crystalline ion-exchange materials.展开更多
Two new thioantimonates,(NH4)2Sb10S16(1)and K1.4(NH4)0.6Sb10S16(2),have been synthesized by solvothermal method with the yields of 80%and 85%,respectively.Single-crystal X-ray diffraction(SCXRD)study reveals that 1 cr...Two new thioantimonates,(NH4)2Sb10S16(1)and K1.4(NH4)0.6Sb10S16(2),have been synthesized by solvothermal method with the yields of 80%and 85%,respectively.Single-crystal X-ray diffraction(SCXRD)study reveals that 1 crystallizes in the monoclinic space group of Pn with a=8.1284(4),b=19.4587(9),c=9.1030(4)A,β=91.736(5)°,V=1439.14(12)A^(3),Z=2,Dc=4.077 g·cm^(-3),F(000)=1576,μ=10.389 mm^(-1),R=0.0343 and w R=0.0624(I>2σ(I));2 also crystallizes in the monoclinic space group of Pn with a=8.0989(6),b=19.3730(17),c=9.0411(6)A,β=91.879(6)°,V=1417.79(19)A^(3),Z=2,Dc=4.207 g·cm^(-3),F(000)=1598,μ=10.748 mm-1,R=0.0323 and w R=0.0664(I>2σ(I)).The anionic frameworks of two compounds both feature two-dimensional(2D)[Sb10S16]n2n-layers.The stabilities and optoelectronic properties of 1 and 2 have been characterized.In particular,they are stable under acidic or alkaline conditions(pH=0 or 12.5),showing excellent acid-based resistance.展开更多
文摘A new selenidomercurate compound, namely(bmmim)2Hg(Se4)2(1, bmmim = 1-butyl-2,3-dimethylimidazolium), has been ionothermally synthesized by the reaction of HgSe, Sb and Se in a mixed solvent of the ionic liquid of(bmmim)Cl and methylamine aqueous solution. The(bmmim)Cl acted as an efficient structure-directing agent(SDA) and reactive solvent in the formation of 1. Single-crystal X-ray diffraction study reveals that 1 crystallizes in the monoclinic space group C2/c with a = 17.9540(10), b = 10.8863(5), c = 16.4728(9)?, β = 110.024(2)°, V = 3025.0(3) ?3, Z = 4, D-1 c = 2.500 mg·m-3, F(000) = 2088, μ = 14.729 mm, R = 0.0186 and wR = 0.0503(I > 2σ(I)). The structure of compound 1 features a bamboo dragonfly-like anion unit of [Hg(Se4)2]2-in which the Hg atom binds to two(Se4)2-groups to form two five-membered rings. The thermal stability and optical property of compound 1 were also investigated.
基金supported by the National Natural Science Foundation of China(Nos.22076185,21771183,21373223,21221001,21171164,20873149 and 20771102)the 973 programs(Nos.2014CB845603,2012CB821702 and 2006CB932904)+3 种基金the Natural Science Foundation of Fujian Province(Nos.2020J06033,2018J01027,2010J01056)FJIRSM&IUE Joint Research Fund(No.RHZX-2018-005)Chunmiao project of Haixi institute of Chinese Academy of Sciences(CMZX-2014-001)the Youth Innovation Promotion Association of Chinese Academy of Sciences(2011220)。
文摘The nuclear fuel cycle inevitably generates a large amount of radioactive waste liquid,which will pose a serious threat to the ecological environment and human health.Ion exchange method has received wide attention for its easy operation,low cost and no secondary pollution.However,the effective removal of radioactive ions from complex solutions still remains a serious challenge due to their environmental mobility and radiotoxicity.We have developed an efficient strategy to construct crystalline ion-exchange materials by inducing layered or three-dimensional microporous anionic frameworks by organic cations that can be effectively exchanged by radioactive metal ions.This type of materials can be applied effectively to the removal of radioactive ions from complex solutions and the removal mechanism has been deeply clarified by means of single crystal structure analyses,theoretical calculations,etc.This review summarizes our recent progress in the study of synthesis,structures and properties of radioactive ion removals for such type of crystalline ion-exchange materials.
基金supported by the National Science Foundations of China(Nos.22076185 and 21771183)the Natural Science Foundation of Fujian Province(No.2020J06033)FJIRSM&IUE Joint Research Fund(No.RHZX-2018-005)。
文摘Two new thioantimonates,(NH4)2Sb10S16(1)and K1.4(NH4)0.6Sb10S16(2),have been synthesized by solvothermal method with the yields of 80%and 85%,respectively.Single-crystal X-ray diffraction(SCXRD)study reveals that 1 crystallizes in the monoclinic space group of Pn with a=8.1284(4),b=19.4587(9),c=9.1030(4)A,β=91.736(5)°,V=1439.14(12)A^(3),Z=2,Dc=4.077 g·cm^(-3),F(000)=1576,μ=10.389 mm^(-1),R=0.0343 and w R=0.0624(I>2σ(I));2 also crystallizes in the monoclinic space group of Pn with a=8.0989(6),b=19.3730(17),c=9.0411(6)A,β=91.879(6)°,V=1417.79(19)A^(3),Z=2,Dc=4.207 g·cm^(-3),F(000)=1598,μ=10.748 mm-1,R=0.0323 and w R=0.0664(I>2σ(I)).The anionic frameworks of two compounds both feature two-dimensional(2D)[Sb10S16]n2n-layers.The stabilities and optoelectronic properties of 1 and 2 have been characterized.In particular,they are stable under acidic or alkaline conditions(pH=0 or 12.5),showing excellent acid-based resistance.
