Lili Wen

Huazhong (Central China) Normal University, Wu-han-shih, Hubei, China

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Publications (29)104.1 Total impact

  • Applied Surface Science 08/2015; DOI:10.1016/j.apsusc.2015.08.061 · 2.71 Impact Factor
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    ABSTRACT: Two amino-decorated metal-organic frameworks have been constructed, which are the rare examples of MOF-based fluorescent probes targeting environmentally relevant guest species, such as Hg (II) and Cr (VI) ions in aqueous solution, with high selectivity and sensitivity. The possible sensing mechanism is also discussed.
    Inorganic Chemistry 07/2015; 54(15). DOI:10.1021/acs.inorgchem.5b00098 · 4.76 Impact Factor
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    ABSTRACT: Three MOFs [M2(D-cam)2(bimb)2]n•3.5nH2O (M = Mn for 1, Co for 2) and [Cd8(D-cam)8(bimb)4]n (3) (D-H2cam = D-camphor acid, bimb = 4,4'-bis(1-imidazolyl)biphenyl) have been solvothermally synthesized, which exhibit structural diversity. The charming aspect of these frameworks is that, compound 3 is the very first MOF-based sensor for quantitative detecting three different types of analytes (metal ions, aromatic molecules and pesticides). And also, both compounds 2 and 3 show rapid uptake and ready regeneration for the methyl orange (MO), as well as can selectively MO over methylene blue (MB) with high MO/MB separation ratio.
    ACS Applied Materials & Interfaces 02/2015; 7(7). DOI:10.1021/acsami.5b00160 · 6.72 Impact Factor
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    ABSTRACT: Solvothermal reactions of 5-(4-pyridyl)-isophthalic acid (H2pbdc) and transition-metal centers (Ni2+/Co2+/Zn2+) in the presence (or absence) of N-auxiliary 4,4′-bis(1-imidazolyl)biphenyl (bimb) ligand produce [Ni2(pbdc)2(μ2-H2O)(H2O)2·(DMA)2.7]n (DMA = N,N′-dimethylacetamide, 1), [Ni12(pbdc)12(μ2-H2O)6(py)2(H2O)8(DMA)2·(H2O)5·(DMA)9]n (2), [Co2(pbdc)2(bimb)2·(bimb)0.5·(H2O)4·(DMF)0.25]n (3) and [Zn(pbdc)(bimb)·(H2O)]n (4), which exhibit structural diversity. Both compounds 1 and 2 display a uninodal 8-connected 3D tsi net, but feature different crystal systems and space groups from each other. Compound 3 adopts a 2-fold interpenetrating binodal (3,5)-connected 3D hms net and compound 4 features a rare 2-fold interpenetrating binodal (3,4)-connected 3D fsx architecture. In particular, activated 3 shows high-efficiency for the selective sorption of small molecules, including CO2 over N2 and CH4, H2 over N2, as well as alcohols from water. More importantly, 4 represents the first report on a MOF as a promising luminescent probe for detecting pesticides, and also the very first example for detecting both pesticides and solvent molecules simultaneously.
    07/2014; 2(31). DOI:10.1039/C4TA01900H
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    ABSTRACT: Two three-dimensional microporous compounds, Cu6(BTTC)4(H2O)6·xS (1) and [(CH3)2NH2]3[(Cu4Cl)3(BTTC)8]·yS (2, H3BTTC = benzo-(1,2;3,4;5,6)-tris (thiophene-2′-carboxylic acid), S represents noncoordinated solvent molecules), have been solvothermally synthesized and characterized, both of which are based upon truncated octahedron subunits and contain uniform nanosized cavities but exhibit different topological frameworks. Complex 1 demonstrates high adsorption enthalpies for H2 and CO2 gas molecules, stemming principally from the presence of the exposed metal Cu(II) sites on the pore surface. In particular, activated complex 1 shows high efficiency for the separation of energy-correlated molecules, including CO2 over N2 and CH4 under ambient conditions.
    Crystal Growth & Design 05/2014; 14(6):2866–2872. DOI:10.1021/cg500175k · 4.89 Impact Factor
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    ABSTRACT: A three-dimensional microporous framework, Zn(ii)-MOF [Zn(HPyImDC)(DMA)]n () (H3PyImDC = 2-(pyridine-4-yl)-1H-4,5-imidazoledicarboxylic, DMA = N,N'-dimethylacetamide), with open metal sites and small-sized pores, exhibits excellent selective capture of CO2 over N2 and CH4 at 273 K, as well as alcohols from water. The excellent CO2 adsorption selectivity of allows its potential use in the capture of CO2 from industrial flue gas or the removal of CO2 from natural gas. More interestingly, compound represents the rare case of porous materials separating propanol isomers, which may be caused by the relative flexibility of the linear n-propanol considering that both n-propanol and i-propanol have similar kinetic diameters.
    Dalton Transactions 04/2014; 43(22). DOI:10.1039/c4dt00307a · 4.20 Impact Factor
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    ABSTRACT: A Cd(ii)-MOF [Cd(L)(DMF)] () (H2L = 5-(4-pyridyl)-isophthalic acid) featuring high thermal and chemical stability has been solvothermally synthesized and characterized. Complex is a robust multifunctional three-dimensional (3D) microporous framework possessing an unusual (4,5)-connected topological net. Activated shows high-efficiency for the selective capture of CO2 over N2 and CH4 under ambient conditions, which ranks it among MOFs with the highest selectivity. In addition, desolvated exhibits good separation ratios of H2 over N2 at lower temperature, as well as alcohols from water. In particular, desolvated demonstrates significantly higher adsorption enthalpies for CO2 and CH4 gas molecules, which are in the range of the highest Qst values reported to date. Furthermore, complex displays visible photoluminescence in the solid state under UV irradiation.
    Dalton Transactions 03/2014; 43(18). DOI:10.1039/c4dt00230j · 4.20 Impact Factor
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    ABSTRACT: Solvothermal reactions of 2,5-thiophenedicarboxylate (H2tdc) and N-auxiliary ligands in the presence of cobalt(ii), zinc(ii) and cadmium(ii) salts have given rise to seven new metal-organic frameworks, namely, [Co2(tdc)2(bpp)2(H2O)·(H2O)]n (bpp = 1,3-bis(4-pyridyl)propane) (), [Cd(tdc)(bpp)(H2O)·(H2O)2]n (), [Zn2(tdc)2(bbi)2·(H2O)2]n (bbi = 1,1'-(1,4-butanediyl)bis(imidazole)) (), [Co4(tdc)3(bimb)4(H2O)5·(tdc)·(DMF)·(H2O)2]n (bimb = 4,4'-bis(1-imidazolyl)biphenyl) (), [Zn4(O)(tdc)3(bimb)4·(H2O)5.25·(CH3OH)]n (), [Cd4(tdc)4(bimb)6·(H2O)2·(CH3OH)2·(DMF)4] () and [Co2(tdc)2(tib)2·(H2tdc)·(DMF)2] (tib = 1,3,5-tris(1-imidazolyl)benzene) (), which exhibit structural diversity. Compounds display 3D 2-fold interpenetrating 8-connected tsi net, 2D 4-connected sql net, and 3D 5-fold interpenetrating 4-connected dia net, respectively; while compound features an extremely rare 3D 7-connected hxg-d cationic net and compound adopts a 3D trinodal (4,4,6)-connected net with a new topology structure. For compounds and , the topology in the structures were determined as 3D 3-fold interpenetrating 5-connected bnn net and 3D 2-fold interpenetrating binodal (3,5)-connected net, respectively. In the solid state, complexes , and exhibit nonlinear optical properties, and complex has also been evaluated as a promising visible-light-driven photocatalyst for degradation of organic pollutants. The magnetic investigation of complexes and shows that there exists spin-canted antiferromagnetism for , whereas strong antiferromagnetic interaction and/or the depopulation of the higher energy Kramers doublets of the Co(ii) centers are dominant in .
    Dalton Transactions 09/2013; 42(46). DOI:10.1039/c3dt51905h · 4.20 Impact Factor
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    ABSTRACT: Solvothermal reactions of 2-amino-1,4-benzene dicarboxylic acid (NH2bdcH2) and N-auxiliary ligands in the presence of manganese(II), zinc(II) and cobalt(II) salts have given rise to four new metal–organic frameworks, namely, [Mn5(NH2bdc)5(bimb)5·(H2O)0.5]n (bimb = 4,4′-bis(1-imidazolyl)biphenyl) (1), [Zn(NH2bdc)(bix)·(DMF)2]n (bix = 1,4-bis(imidazol-1-ylmethyl)benzene) (2), [Co(NH2bdc)(bix)·(DMF)·(CH3CH2OH)]n (3) and [Co(NH2bdc)(bpp)]n (4) (bpp = 1,3-bis(4-pyridyl)propane). Single-crystal X-ray diffraction analyses revealed that MOF 1 displays 5-fold interpenetrating 4-connected dia 3D net; MOFs 2 and 3 are isomorphic, which possess 3-fold interpenetrating dia 3D nets; MOF 4 exhibits 4-connected sql 2D net. Noncentrosymmetric structures and multifunctionality in 1–3 are established by varying ligands and metal centers. In the solid state, polar MOFs 1–3 exhibit nonlinear-optic (NLO) and MOF 1 demonstrates typical ferroelectric behaviour with a remnant electric polarization (Pr) of 1.2 μC cm−2 and an electric coercive field (Ec) of 0.35 kV cm−1. In addition, MOF 2 could be a potential luminescent probe for detecting nitrobenzene or 2-nitrotoluene via fluorescence enhancement and has been evaluated as a promising visible-light-driven photocatalyst for degradation of organic pollutants.
    Journal of Materials Chemistry 10/2012; 22(42):22603-22609. DOI:10.1039/C2JM34349E · 7.44 Impact Factor
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    ABSTRACT: Single-walled carbon nanotubes (SWNTs) that are covalently functionalized with benzoic acid (SWNT-PhCOOH) can be integrated with transition-metal ions to form 3D porous inorganic-organic hybrid frameworks (SWNT-Zn). In particular, N(2)-adsorption analysis shows that the BET surface area increases notably from 645.3 to 1209.9 m(2)  g(-1) for SWNTs and SWNT-Zn, respectively. This remarkable enhancement in the surface area of SWNT-Zn is presumably due to the microporous motifs from benzoates coordinated to intercalated zinc ions between the functionalized SWNTs; this assignment was also corroborated by NLDFT pore-size distributions. In addition, the excess-H(2)-uptake maximum of SWNT-Zn reaches about 3.1 wt. % (12 bar, 77 K), which is almost three times that of the original SWNTs (1.2 wt. % at 12 bar, 77 K). Owing to its inherent conductivity and pore structure, as well as good dispersibility, SWNT-Zn is an effective candidate as a sensitive electrochemical stripping voltammetric sensor for organophosphate pesticides (OPs): By using solid-phase extraction (SPE) with SWNT-Zn-modified glassy carbon electrode, the detection limit of methyl parathion (MP) is 2.3 ng mL(-1).
    Chemistry - A European Journal 09/2012; 18(37):11804-10. DOI:10.1002/chem.201200383 · 5.73 Impact Factor
  • Lili Wen · Xiaohuan Ke · Ling Qiu · Yang Zou · Li Zhou · Jinbo Zhao · Dongfeng Li ·
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    ABSTRACT: Two microporous cadmium(II) metal–organic frameworks, [Cd(cptpy)(Ac)(H2O)·(DMA)(H2O)]n (1) and [Cd(cptpy)2·(DMF)2]n (2) (Hcptpy = 4-(4-carboxyphenyl)-2,2′:4′,4″-terpyridine, DMA = N,N-dimethylacetamide, DMF = dimethylformamide) have been solvothermally synthesized under different reaction conditions. Complex 1 is a double-interpenetrating 3D network, while 2 is a noninterpenetrating (3,5)-connected 2D framework. The dehydrated forms of compounds 1 and 2 exhibit selective adsorption of CO2 over N2 and H2O over CH3OH. In addition, the adsorption value of CO2 for 2 is higher than that of 1. The contents of uncoordinated pyridine nitrogen (Lewis basic sites) per formula unit of 1 and 2 are 2.16 and 4.36%, respectively. Obviously, the grafting of more uncoordinated pyridine nitrogen into compound 2 could enhance adsorption of the acidic CO2 molecule. Notably, both 1 and 2 display strong photoluminescence. The nature of electronic transitions for complex 1 in the photoluminescent process was investigated by means of time-dependent density functional theory (TDDFT) calculations and molecular orbital analyses, which collaborates that the luminescent property is ligand-based.
    Crystal Growth & Design 07/2012; 12(8):4083–4089. DOI:10.1021/cg300566x · 4.89 Impact Factor
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    ABSTRACT: Five new metal–organic frameworks [M(btec)0.5(bimb)]n (1) (M = Co (1), Ni (2), Cu (3), Zn (4)) and [Cd(btec)0.5(bimb)0.5]n (5), were obtained by reactions of the conjugated 1,2,4,5-benzenetetracarboxylic acid (H4btec) and 4,4′-bis(1-imidazolyl)biphenyl (bimb) with corresponding metal salts under hydrothermal conditions, respectively. MOFs 1-5 show different structures and topologies: compounds 1 and 4 are isomorphic, which possess typical PtS 3D nets; compound 2, 3 and 5 exhibit 2D layer structure, NbO 3D network and (4,6)-connected 3D binodal topology, respectively. Notably, compounds 1, 2, and 5 represent the rare example of MOFs-based visible-light-driven photocatalysts and show good stability toward photocatalysis. Furthermore, compound 5 is photocatalytically more active than 1 and 2 because of the relatively narrower band gap calculated from LMCT transitions. In addition, the formation rate of •OH radicals on compound 5/H2O interface via photocatalytic reactions is much higher than that of 1 and 2, implying that the formation rate of •OH radicals during photocatalysis is in agreement with photocatalytic activity and the formation rate of •OH radicals is an important factor influencing photocatalytic performance.
    Crystal Growth & Design 02/2012; 12(3):1603–1612. DOI:10.1021/cg2016512 · 4.89 Impact Factor
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    ABSTRACT: Six new metal-organic frameworks [Cu(obba)(bimb)·(obbaH(2))](n) (1), [Cu(obba)(bimb)](n) (2), [Zn(2)(obba)(2)(bimb)(2)(DMF)(2)(H(2)O)(3.5)](n) (3), [Ni(3)(2,2',4,4'-bptcH)(2)(bimb)(2)(H(2)O)(2)·(H(2)O)(2)](n) (4), [Ni(2)(bimb)(3)(H(2)O)(6)·(aobtc)·(DMF)(2)·(H(2)O)(2)](n) (5) and [Cd(3,3',4,4'-bptcH(2))(H(2)O)·(bimb)](n) (6), were obtained by reactions of 4,4'-bis(1-imidazolyl)biphenyl (bimb) and multi-carboxylic acids of 4,4'-oxybis(benzoic acid) (obbaH(2)), 2,2',4,4'-biphenyltetracarboxylate acid (2,2',4,4'-bptcH(4)), azoxybenzene-3,3',5,5'-tetracarboxylic acid (aobtcH(4)), and 3,3',4,4'-biphenyltetracarboxylate acid (3,3',4,4'-bptcH(4)) with corresponding metal salts under hydro/solvothermal conditions, respectively. Complexes 1-3 have entangled structures with different topologies: 1 is a 3-fold interpenetrating NbO three-dimensional (3D) network; 2 is a 3-fold interpenetrating dmp 3D net; 3 is a 6-fold interpenetrating dia 3D chiral net containing rare 1D helical chains with the same handedness. Complex 4 is an uninodal 6-connected network with a Schäfli symbol of (4(8)6(4)8(3)) based on the trinuclear Ni(II) subunits, while complexes 5 and 6 are 1D chains. Interestingly, compound 6 represents the rare example of MOFs that exhibit high photocatalytic activity for dye degradation under visible light and shows good stability towards photocatalysis. Complexes 3 and 6 exhibit intense blue emissions in the solid state at room temperature whereas 3 appears to be a good candidate of novel hybrid inorganic-organic NLO material.
    Dalton Transactions 11/2011; 40(44):11856-65. DOI:10.1039/c1dt11130b · 4.20 Impact Factor
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    ABSTRACT: The treatment of Ln(NO3)3·6H2O (Ln = La, Ce, Eu, Gd, Dy) with 1,3,5-benzenetricarboxylic acid (H3BTC) in a water–ethanol solution facilely yields crystal nanorods of rare earth metal–organic frameworks (MOFs) at room temperature. Electron micrographs show that the nanorods are 50–200 nm in width, 50–100 nm in thickness and 1–2 μm in length. All the crystal nanorods have the same Ln(BTC)(H2O)6 structure as identified by power X-ray diffraction, elemental analysis, thermogravimetric and Fourier transform infrared analysis. The optical properties of all the compounds are recorded; and, the nanoscale MOFs (NMOFs) with Eu3+ and Dy3+ show excellent photoluminescence.
    Journal of Inorganic and Organometallic Polymers and Materials 07/2011; 22(4). DOI:10.1007/s10904-011-9498-2 · 1.16 Impact Factor
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    ABSTRACT: A new metal-organic framework, [Zn5(trencba)2(OH)2Cl2·4H2O] (1) [H3trencba=N,N,N′,N′,N′′,N′′-tris[(4-carboxylate-2-yl)methyl]-tris(2-aminoethyl)amine], constructed from a flexible tripodal ligand based on C3 symmetric tris(2-aminoethyl)amine, has been synthesized hydrothermally and characterized by elemental analysis, IR, TG, XRD and single-crystal X-ray diffraction analysis. Compound 1 contains an unprecedented linear penta-nuclear zinc cluster fragment. Each ligand links four penta-nuclear fragments, and every fragment links eight ligands to generate a three-dimensional non-interpenetrated porous framework. The uncoordinated water molecules were observed trapped in the void pores. Compound 1 represents the first example of (6,8)-connected 3D bi-nodal framework based on a single kind of organic ligand. The photoluminescence measurements showed that complex 1 exhibits relatively stronger blue emissions at room temperature than that of the ligand.
    Journal of Solid State Chemistry 03/2009; 182(3):574-579. DOI:10.1016/j.jssc.2008.11.031 · 2.13 Impact Factor
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    ABSTRACT: Glycoluril-based molecular clip L bearing two N,N'-chelating sites and a rigid cavity has been prepared. With L, one metallomacrocycle and three metal-organic frameworks, (Cu(L)(OAc)2(H2O) ·2H2O)n (1), (Co(L)2(NO3)2(H2O)2 ·4H2O)n (2), (Zn(L)2(NO3)2(H2O)2 ·7H2O)n (3), and (Cu(L)(I) ·DMF)n (4) were crystallized, which display three different structure types. In 1, two ligands are arranged in a face-to-face conformation to coordinate two Cu(II) ions from opposite directions through axial positions, generating a pesudo-rectangular metallomacrocycle. Polymer 2 is an 1D double ribbons. Interestingly, each double ribbons is connected by hydrogen bond with the result that the channels are formed and run parallel to the ab diagonal, and the water chains with the symbol C4 are located within the channels. Polymer 3 exhibits the same topological morphology as polymer 2. However, each double ribbons in 3 is connected by a different type of hydrogen bond with the result that the channels are formed along the b axis. Polymer 4 is a two-dimensional (2D) tubular sheet constructed by an unprecedented (CuI)∞ column and clip ligand L. The type of the (CuI)∞ column can be described as a zigzag chain and has been rarely reported. The DMF solvent molecules are located within the channels.
    Crystal Growth & Design 05/2008; 8(5):1645-1653. DOI:10.1021/cg701090c · 4.89 Impact Factor
  • YunXia Sui · LiLi Wen · Huan Zhang · QingJin Meng ·
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    ABSTRACT: The X-ray crystal structures of (NH4)2(15-crown-5)3[Cu(mnt)2] (1) and (NH4)2(benzo-15-crown-5)4-[Cu(mnt)2]·0.5H2O (2) were determined. Two single crystals are composed of distinct structures of ammonium-crown ether supramolecular cation and [Cu(mnt)2]2− anion. The triple-decker dication in complex 1 and a sandwich dimmer in complex 2 were observed. X-Band EPR studies on the single crystals of both complex 1 and complex 2 have been carried out at room temperature, which revealed that complex 2 showed a perfect hyperfine structure of Cu whereas that of complex 1 could not be observed. The principal values and direction cosines of the principal axes of the g and A tensors were computed by a least-squares fitting procedure. The spin density of Cu(II) was estimated according to the principal values of the A tensors and compared well with the results calculated based on DFT method.
    Science in China Series B Chemistry 10/2007; 50(5). DOI:10.1007/s11426-007-0039-3 · 1.20 Impact Factor
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    ABSTRACT: Two new metal−organic frameworks (MOFs), [Zn(p-BDC)(m-bix)0.5][Zn(p-BDC)(m-bix)]·H2O (1) and [Zn(p-BDC)(m-bix)] (2) (p-BDC = terephthalate, m-bix =1,3-bis(imidazol-1-ylmethyl)benzene), were synthesized and characterized structurally. Both of the MOFs feature the interpenetrated two-dimensional (2D) → three-dimensional (3D) network motifs. In particular, complex 1 represents the second example of intertwining of different 2D coordination motifs, and complex 2 shows a 3-fold parallel interpenetrated framework. In addition, the spectroscopic, thermal, and fluorescence properties of complexes 1 and 2 are investigated.
    Crystal Growth & Design 08/2007; 7(9). DOI:10.1021/cg070274z · 4.89 Impact Factor
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    ABSTRACT: A novel coordination polymer [Zn(4,4′-bipyridine)(Hptc) · H2O]n (H3ptc=pyridine-2,4,6-tricarboxylic acid) (1) was obtained via hydrothermal method and characterized by elemental analyses, IR spectrum, TG analysis, luminescent spectrum and single-crystal X-ray diffraction analysis. Single-crystal structural analysis reveals that the center Zn2+ions are linked by bridging – carboxylate group of H3ptc, to form helix. The winding axes parallel to the b axis and the pitch to the length is 7.147 Å. Two kinds (one is left handed and the other is right handed) of parallel helices existed correspondingly, which are connected by rigid 4,4′-bipyridine ligand to give a 2D puckered herringbone structural motif.
    Inorganic Chemistry Communications 01/2007; 10(1):74-76. DOI:10.1016/j.inoche.2006.09.011 · 1.78 Impact Factor
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    ABSTRACT: Four novel interesting coordination polymers, [Cd3(bix)3(SSA)2(H2O)4]n (1), [Co(bix)2(HSSA)(H2O)·H2O]n (2), [Ni(bix)2(HSSA)(H2O)·H2O]n (3) and [Mn(bix)2·(HSSA)·2H2O]n (4) (bix = 1,4-bis(imidazol-1-ylmethyl)-benzene; H3SSA = 5-sulfosalicylic acid), have been synthesized under hydrothermal conditions and structurally characterized. Polymer 1 features a two-dimensional (2D) infinite layer framework built from tri-cadmium clusters, which is further stacked along the c-axis via strong interlayer hydrogen-bond interactions to form a three-dimensional (3D) network. Both polymers 2 and 3 exhibit one-dimensional (1D) double-stranded chains, which are connected by strong hydrogen-bond interactions along the c-axis to result in 2D layers; in addition, the layers are further stacked along the b-axis by π−π interactions. Polymer 4 also possesses 1D double-stranded chains. It is noteworthy that ligand HSSA in compound 4 is not coordinated to the metal ions but only acts as an anion moiety to compensate the charge balance. The fluorescent properties for these compounds were investigated and the mechanisms were validated by density functional theory (DFT) calculations on the experimental geometries. In addition, 4 is nearly paramagnetic, whereas weak ferromagnetic interactions between M(II) (M = Co, Ni) ions have been found in 2 and 3.
    Crystal Growth & Design 12/2006; 7(2). DOI:10.1021/cg060287x · 4.89 Impact Factor

Publication Stats

1k Citations
104.10 Total Impact Points


  • 2008-2014
    • Huazhong (Central China) Normal University
      • College of Chemistry
      Wu-han-shih, Hubei, China
  • 2004-2007
    • Nanjing University
      • • Department of Chemical Engineering
      • • State Key Laboratory of Coordination Chemistry
      • • Department of Chemistry
      Nan-ching, Jiangsu Sheng, China