Liming Fan
North University of China
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Featured researches published by Liming Fan.
CrystEngComm | 2017
Liangqin Huo; Jie Zhang; Lingling Gao; Xiaoqing Wang; Liming Fan; Kegong Fang; Tuoping Hu
Two coordination polymers (CPs), namely, [Cd1/2(L)1/3(bib)1/2(H2O)]n (1) and {[Cd2(HL)2(bibp)2]·3H2O}n (2), have been assembled from the tripodal ligand tris(p-carboxyphenyl)phosphane oxide (H3L) with the help of 1,4-bis(imidazol-1-yl)benzene (bib) or 4,4′-bis(imidazol-1-yl)biphenyl (bibp). Structural analyses revealed that complex 1 is an unprecedented (3,4)-connected {103}2{106}3 net with 2D [Cd3(L)2]n sheets arranged in an ABCA′B′C′A′′B′′C′′ fashion. Complex 2 exhibits 3-fold interpenetrated sheets with a 4-connected {44·62}-sql sheet. Structural comparison reveals that the length of bis(imidazole) ancillary linkers plays a critical role in determining the structures and topologies. To our delight, fluorescence measurements show that the two Cd(II) CPs can selectively and sensitively detect Hg2+ cations and nitrobenzene derivatives (nitrobenzene, p-nitrotoluene, p-nitroaniline, and p-nitrophenol), which suggests that the two Cd(II) CPs are promising bifunctional luminescence sensor materials that could sense metal ions and small organic molecules.
CrystEngComm | 2017
Lingling Gao; Qiannan Zhao; Miao-Miao Li; Liming Fan; Xiao-Yan Niu; Xiaoqing Wang; Tuo-Ping Hu
Herein, five coordination polymers, namely {[Ni2(tptc)(4,4′-bibp)2]·2H2O·2cyclohexanol}n (1), {[Co2(tptc)(4,4′-bibp)2]·2H2O·2cyclohexanol}n (2), {[Zn2(tptc)(1,2-bimb)2]}n (3), {[Co(tptc)0.5(1,4-bib)]·H2O·DMF}n (4), and {[Co2(tptc)(1,2-bimb)(H2O)]·H2O}n (5) (H4tptc = terphenyl-3,3′′,5,5′′-tetracarboxylic, 4,4′-bibp = 4,4′-bis(imidazolyl)biphenyl, 1,4-bib = 1,4-bis(imidazol-1-yl)benzene, and 1,2-bimb = 1,2-bis(imidazol-1-ylmethyl)benzene) were successfully constructed based on a rigid terphenyl-tetracarboxylic acid ligand and N-containing auxiliary ligands under solvothermal conditions. Their structures were determined by single-crystal X-ray diffraction and further characterized by elemental analyses, IR spectroscopy, powder X-ray diffraction (PXRD), and thermogravimetric (TG) analyses. Complexes 1 and 2 involved a new 4,6-c 3D network structure. Complex 3 displayed an open 3D structure with the bbf topological type. Complex 4 involved an extended 3D (4,6)-c network with the point symbol of {44·610·8}{44·62}. Complex 5 had a 2D framework with the dinuclear [Co2(COO)2] SBUs. The variable-temperature magnetic susceptibilities of complexes 1, 2, 4, and 5 were also investigated, and the results indicated that the isophthalic acid bridge exhibited weak ferromagnetic coupling. Moreover, the fluorescence experiments showed that complex 3 had a potential application in the sensing of small organic molecules.
CrystEngComm | 2018
Tuo-Ping Hu; Qiannan Zhao; Liangqin Huo; Lingling Gao; Jie Zhang; Xiaoqing Wang; Liming Fan
Two lanthanide metal–organic frameworks (LOFs), namely, {[Eu(L3−)(H2O)]·5H2O}n (1) and {[Dy(L3−) (H2O)]·2CH3CN}n (2), have been synthesized based on tris(4-carboxyphenyl)phosphane oxide (H3L) and further characterized by powder X-ray diffraction (PXRD), IR spectroscopy, elemental analyses and thermogravimetric (TG) analyses. X-ray diffraction analyses showed that complexes 1 and 2 are isostructural, and thus the structure and gas adsorption properties of complex 1 and the magnetic properties of 2 were described as a representative in detail. Complex 1 appears to have a 3D 6-connected {412·63} net based on binuclear {Eu2(COO)2} SBUs. Furthermore, the adsorption properties of 1 have been investigated using N2, H2, CO2 and CH4 gases. 1 has high CO2 uptake and exhibits highly selective adsorption of CO2 over CH4 at room temperature, which allows 1 to have a potential application in gas separation and purification. Finally, its full magnetic properties revealed that complex 2 displays antiferromagnetic coupling between DyIII ions and single-molecule magnet (SMM) behavior. According to the Arrhenius law, the anisotropy barrier (Ueff) and pre-exponential factor (τ0) were extracted by fitting of the alternating current data, giving the values of 53.5 K and 3.1 × 10−7 s, respectively. The afforded α parameter is less than 0.10, suggesting a single relaxation process.
CrystEngComm | 2018
Jie Zhang; Lingling Gao; Lijun Zhai; Xiaoqing Wang; Liming Fan; Tuo-Ping Hu
Four 3D novel coordination polymers (CPs), formulated as {[Co3(TCPB)2(bibp)2(dioxane)2.5(H2O)2]·(DMF)}n (1), {[Cd6(TCPB)4(bibp)4(dioxane)(H2O)2]·(dioxane)3·DMF·(H2O)0.5}n (2), {[Co1.5(TCPB)(bimb)0.5(DMF)(dioxane)]}n (3), and {[Zn1.5(TCPB)2(bimb)(DMF)(dioxane)2]·dioxane}n (4) (H3TCPB = 1,3,5-tris(4-carbonylphenyloxy)benzene, bibp = 4,4′-bis(imidazol-1-yl)biphenyl, and bimb = 1,4-bis(imidazol-1-ylmethyl)benzene), have been synthesized under solvothermal conditions and characterized by elemental analyses (EA), single-crystal X-ray diffraction analyses, X-ray powder diffraction analyses (PXRD), IR spectra, and thermogravimetric analyses (TGA). The structural analyses reveal that complex 1 can be simplified as a new 2-nodal (3,10)-{3·42}2 {34·410·514·614·72·8}-3,10T3 net, complex 2 has a 3D 2-nodal (3,8)-c network with the point symbols of {42·5}2{44·59·68·73·83·9}, complex 3 exhibits a novel 3D framework with the point symbol of {410·632·7·82}{43}2, and the structure of 4 is a (3,8)-connected {43}2{46·618·84}-tfz-d net. Furthermore, gas sorption behaviors of complex 1 for N2, H2, CH4, and CO2 have been comprehensively studied at varying temperatures: the results reveal that the adsorption capacity of 1 to N2 is stronger than those of other gases. Meanwhile, IAST calculations reveal that 1 exhibits excellent selective separation for CO2/CH4. Magnetic measurements indicate that both 1 and 3 have antiferromagnetic interactions within the trinuclear clusters. In addition, the fluorescent measurements showed that 2 and 4 exhibit highly selective and sensitive detection of Fe3+ and Cr3+ ions.
CrystEngComm | 2018
Liming Fan; Yujuan Zhang; Jinfang Liang; Xiaoqing Wang; Hongxiao Lv; Jiang Wang; Li Zhao; Xiutang Zhang
Based on the designed π-conjugated aromatic pentacarboxylate of 3,5-di(2′,4′-dicarboxylphenyl)benozoic acid (H5DDB) and bis(imidazole) ancillary linkers (bib = 1,4-bis(imidazol-1-yl)benzene, m-bimb = 1,3-bis(imidazol-1-ylmethyl)benzene, p-bimb = 1,4-bis(imidazol-1-ylmethyl)benzene), five 3D coordination polymers, namely, {Co2(HDDB)(bib)1.5(H2O)2]·H2O}n (1), {[Mn2.5(H2DDB)(HDDB)(bib)0.5(μ2-H2O)(H2O)1.5]·(Hbib)·0.5(H2bib)·0.5H2O}n (2), {[Cd2(HDDB)(bib)1.5(H2O)]·2.5H2O}n (3), {[Cd2(HDDB)(m-bimb)]·H2O}n (4), and {[Cd2(DDB)(p-bimb)]·2.5H2O·0.5(p-H2bimb)}n (5), have been obtained and characterized. Complex 1 is a 3D 3-fold interpenetrating (3,4)-c {83}2{85·9}-vtx net. Based on the binuclear {Mn2(COO)2} SBUs, as well as the trinuclear {Mn3(COO)4(μ2-H2O)2} SBUs, complex 2 shows a 3D 3,4,6-c 3,4,6T10 net with a point symbol of {3·72}2{32·73·8}{32·76·86·10}. Complex 3 displays an unprecedented 3D (3,4,4)-c net with a point symbol of {6·82}2{64·82}2{8·104·12} based on the binuclear {Cd2(COO)4} SBUs. Complex 4 shows an interesting 3D (3,10)-c {410·632·83}{43}2 net based on the quadrilateral tetranuclear {Cd4(COO)8} SBUs. Complex 5 exhibits a linear tetranuclear {Cd4(COO)4} SBU-based 3D (4,10)-c deh1 net with a point symbol of {3·45}2{34·412·510·614·73·82}. A variable temperature magnetic susceptibility investigation indicated that antiferromagnetic interactions exist between the neighbouring metal ions in 1 and 2. Fluorescence measurements showed that 3–5 are promising luminescence sensors for the detection of Cr(VI) anions (CrO42− and Cr2O72− anions) in aqueous solution.
Crystal Growth & Design | 2017
Jie Zhang; Liangqin Huo; Xiaoqing Wang; Kegong Fang; Liming Fan; Tuo-Ping Hu
Journal of Solid State Chemistry | 2017
Liangqin Huo; Jie Zhang; Lingling Gao; Xiaoqing Wang; Liming Fan; Kegong Fang; Tuoping Hu
Journal of Solid State Chemistry | 2018
Ya-Ru Huang; Lingling Gao; Xiaoqing Wang; Liming Fan; Tuo-Ping Hu
Polyhedron | 2018
Liming Fan; Lingling Gao; Xiaoqing Wang; Jiang Wang; Li Zhao; Kegong Fang; Tuoping Hu
Journal of Solid State Chemistry | 2018
Liming Fan; Yujuan Zhang; Jiang Wang; Li Zhao; Xiaoqing Wang; Tuo-Ping Hu; Xiutang Zhang