Li-Yi Zhang

Northeast Institute of Geography and Agroecology, Beijing, Beijing Shi, China

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Publications (64)219.56 Total impact

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    ABSTRACT: The synthesis, structure, and phosphorescence properties of two families of triphosphine-supported Au(I)–Ag(I) heteronuclear alkynyl cluster complexes with unprecedented Au2Ag2 and Au8Ag4 cluster structures are described. The phosphorescence emission over the whole visible light region was systematically tuned through modification of the electronic effects in aromatic acetylide ligands to attain bright phosphorescence with different luminescent colors. Introduction of electron-withdrawing CF3 to phenylacetylides results in the emission spectral blue-shift, while it shows progressive red-shift upon introducing electron-donating But, OMe, or NMe2. As demonstrated from both experimental and theoretical studies, the phosphorescence arises primarily from 3LLCT/3IL and Au2Ag2/Au8Ag4 cluster-centered 3[d→p] transitions.
    Organometallics 09/2013; 32(19):5402–5408. · 4.15 Impact Factor
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    ABSTRACT: A series of highly phosphorescent PtAg2 heterotrinuclear alkynyl complexes with bis(diphenylphosphinomethyl)phenylphosphine (dpmp) were prepared and characterized structurally. The solution phosphorescence with various emitting colors is systematically modulated by modifying substituents as well as π-conjugated systems in aromatic acetylides. The crystals, powders, or films exhibit reversible stimuli-responsive phosphorescence changes upon exposure to vapor of MeCN, pyridine, DMF, etc., resulting from perturbation of d(8)-d(10) metallophilic interaction in the excited states as a consequence of the formation/disruption of Ag-solvent bonds. Both experimental and time-dependent density functional theory (TD-DFT) studies demonstrate that d(8)-d(10) metallophilic interaction exerts a crucial role on phosphorescent characteristics due to the PtAg2 cluster-based (3)[d → p] state. This study affords a paradigm for phosphorescence modulation in d(8)-d(10) heteronuclear complexes.
    Inorganic Chemistry 04/2013; · 4.59 Impact Factor
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    ABSTRACT: Heterotetranuclear geometrical (Er2Yb2/Yb2Er2) and configuational (EuTb3/Eu3Tb) isomeric lanthanide(III) complexes have been synthesized and characterized by spectroscopy as well as X-ray crystallography. The geometric Er2Yb2/Yb2Er2 isomers exhibit dual emissions from both erbium(III) and ytterbium(III) ions. For the EuTb3/Eu3Tb configurational isomers, the TbIII subunits transfer energy to the EuIII centers in the EuTb3 complex, whereas the TbIII ion in the TbEu3 complex serves mainly as a structural stabilizer.
    Crystal Growth & Design 12/2012; 13(2):849–857. · 4.69 Impact Factor
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    ABSTRACT: A Zn(2+)-responsive bimodal magnetic resonance imaging (MRI) and luminescence imaging probe GdL was synthesized. The relaxivity and luminescence properties were examined. In the presence of 0.5 equiv of Zn(2+), the longitudinal relaxivity is increased from 3.8 mM(-1) s(-1) to 5.9 mM(-1) s(-1) at 23 MHz and 25 °C with 55% enhancement, whereas the fluorescence exhibits a 7-fold increase. The Zn(2+) responsive imaging probe shows favorable selectivity and tolerance over a variety of biologically relevant anions and metal ions in physiological pH range for both relaxivity and luminescence. In vitro phantom images and confocal fluorescence images in living cells show that the bimodal Zn(2+) probe can effectively enhance T(1)-weighted imaging contrast and luminescence imaging effect through Zn(2+) coordination with excellent cellmembrane permeability and biocompatibility. Spectral and electrospray ionization mass spectrometry (ESI-MS) studies indicate that two different Zn(2+)-bound species, (GdL)(2)Zn and GdLZn, are formed when 0.5 and 1 equiv of Zn(2+) are bound to GdL complex, respectively. Crystal structural determination and dysprosium-induced (17)O NMR shift (DIS) experiment demonstrate that the increased molecular weight and the improved molecular rigidity upon complexation of Zn(2+) with GdL is the primary factor for relaxivity enhancement. Significant enhancement of the luminescence is due to a heavy atom effect and much increased molecular rigidity upon Zn(2+) binding to 8-sulfonamidoquinoline chromophore.
    Inorganic Chemistry 08/2012; 51(17):9508-16. · 4.59 Impact Factor
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    ABSTRACT: Planar platinum(II) complex Pt(Me(3)SiC≡CbpyC≡CSiMe(3))(C≡CC(6)H(4)CF(3)-4)(2) (6) with 5,5'-bis(trimethylsilylethynyl)-2,2'-bipyridine and 4-trifluoromethylphenylacetylide exhibits remarkable luminescence vapochromic and mechanochromic properties and a thermo-triggered luminescence change. Solid-state 6 is selectively sensitive to vapors of oxygen-containing volatile compounds such as tetrahydrofuran (THF), dioxane, and tetrahydropyrane (THP) with phosphorescence vapochromic response red shifts from 561 and 608 nm to 698 nm (THF), 689 nm (dioxane), and 715 nm (THP), respectively. Upon being mechanically ground, desolvated 6, 6·CH(2)Cl(2), and 6·(1)/(2)CH(2)ClCH(2)Cl exhibit significant mechanoluminescence red shifts from 561 and 608 nm to 730 nm, while vapochromic crystalline species 6·THF, 6·dioxane, or 6·THP affords a mechanoluminescence blue shift from 698 nm (THF), 689 nm (dioxane), or 715 nm (THP) to 645 nm, respectively. When the compounds are heated, a thermo-triggered luminescence change occurs, in which bright yellow luminescence at 561 and 608 nm turns to red luminescence at 667 nm with a drastic red shift. The multi-stimulus-responsive luminescence switches have been monitored by the changes in emission spectra and X-ray diffraction patterns. Both X-ray crystallographic and density functional theory studies suggest that the variation in the intermolecular Pt-Pt interaction is the key factor in inducing an intriguing luminescence switch.
    Inorganic Chemistry 05/2012; 51(10):5569-79. · 4.59 Impact Factor
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    ABSTRACT: A triphosphine-stabilized Ag16Cu9 heterometallic alkynyl cluster complex was prepared by the reaction of polymeric silver(I) (4-tert-butylphenyl)acetylide with a copper(I) dpepp (dpepp = bis(2-(diphenylphosphino)ethyl)phenylphosphine) complex and characterized by X-ray crystallography. This Ag16Cu9 heterometallic alkynyl complex exhibits an unprecedented structural topology stabilized by three auxiliary triphosphine ligands. The (4-tert-butylphenyl)acetylide exhibits five types of asymmetric bonding modes, including μ-η1, μ-η1(σ):η2(π), μ3-η1, μ3-η1(σ):η1(σ):η2(π), and η1-μ4. This Ag16Cu9 complex exhibits visible to near-infrared luminescence in both fluid CH2Cl2 solution and the solid state.
    Organometallics 12/2011; 31(1):256–260. · 4.15 Impact Factor
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    ABSTRACT: Planar platinum(II) complexes Pt(bpyC≡CSiMe(3))(C≡CC(6)H(4)R-4)(2) (R = H (1), Bu(t) (2)) with 5-trimethylsilylethynyl-22'-bipyridine show an unusual, reversible, and reproducible mechanical stimuli-responsive color and luminescence switch. When crystalline 1 or 2 is ground, bright yellow-green emitting is immediately converted to red luminescence with an emission red shift of 121-155 nm for 1 or 53-89 nm for 2. Meanwhile, the crystalline state is transformed to an amorphous phase that can be reverted to the original crystalline state by organic vapor adsorbing or heating, along with red luminescence turning back to yellow-green emitting. The reversibility and reproducibility of luminescence mechanochromic properties have been dynamically monitored by the variations in emission spectra and X-ray diffraction patterns. The drastic grinding-triggered emission red shift is likely involved in the formation of a dimer or an aggregate through Pt-Pt interaction, resulting in a conversion of the (3)MLCT/(3)LLCT emissive state in the crystalline state into the (3)MMLCT triplet state in the amorphous phase. Compared with the drastic grinding-triggered emission red shift in 1 (121-155 nm), the corresponding response shift in 2 (53-89 nm) is much smaller since a bulky tert-butyl in C≡CC(6)H(4)bu(t)-4 induces the planar platinum(II) molecules to stack through a longer Pt-Pt distance and less intermetallic contact compared with that in 1, as suggested from EXAFS studies.
    Inorganic Chemistry 08/2011; 50(18):9090-6. · 4.59 Impact Factor
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    ABSTRACT: A series of platinum(II) complexes with 1,3-bis(2-pyridylimino)isoindoline (BPI) derivatives were prepared by substitution of the coordinated Cl in the precursor complex Pt(BPI)Cl with a N-heterocyclic ligand such as pyridine, phthalazine or phenanthridine. These complexes display orange to red luminescence in fluid dichloromethane solutions and in the solid states at room temperature. The photophysical properties were tuned by introducing electron-withdrawing -NO(2) or electron-donating -NH(2) to the BPI ligand. The DFT computational studies suggest that the emission in the N-heterocyclic ligand substituted platinum(II) complexes originates mainly from the (3)[π→π*(BPI)] (3)IL triplet excited state, mixed with some (3)[dπ(Pt)→π*(BPI)] (3)MLCT character. Compared with the precursor Pt(BPI)Cl, both the low-energy absorption and the emission in the N-heterocyclic ligand substituted platinum(II) complexes exhibits a distinct blue-shift due to an obviously enhanced contribution from the (3)IL state and a reduced (3)MLCT character.
    Dalton Transactions 07/2011; 40(26):6929-38. · 3.81 Impact Factor
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    ABSTRACT: Oxo-centered triruthenium-acetate complexes with a tridentate or bis(tridentate) triazine ligand have been prepared by the reaction of [Ru(3)O(OAc)(6)(py)(2)(CH(3)OH)](+) ([1](+)) with a triazine ligand [3-(2-pyridyl)-1,2,4-triazine (pytz), 3-(2-pyrimidinyl)- 1,2,4-triazine (pmtz), or 5,5',6,6'-tetramethyl-3,3'-bi-1,2,4- triazine (bdmt)]. The dimeric complex [Ru(3)O(OAc)(5)-( py)(2)(2)(mu(4)-pmtz)](2+) ([5](2+)), an intercluster mixed-valence complex ([Ru(3)(III,III,II)-pmtz-Ru(3)(III,III,III)](2+)) containing an asymmetric bis(tridentate) pmtz ligands involved in both mu-eta(1)(N),eta(2)(N,N) and orthometalated mu-eta(1)(C),eta(2)(N,N) bonding modes, was prepared by substitution of a bridging acetate in the parent Ru(3)O(OAc)(6) cluster core. Chemical or electrochemical reduction or oxidation of [5](2+) gave one-electron reduced product [5a](+) or oxidized species [5b](3+), respectively. It is demonstrated that substitution of the bridging acetate by a triazine ligand has a remarkable impact on the electronic and redox characteristics of the triruthenium cluster derivatives. Electrochemical, UV/Vis/NIR spectra, and DFT computational studies demonstrated that there is a distinct cluster-cluster interaction between the two triruthenium cluster moieties across an asymmetric bridging bis(tridentate) triazine in the dimeric triruthenium cluster complex [5](2+).
    Berichte der deutschen chemischen Gesellschaft 05/2011; · 2.94 Impact Factor
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    ABSTRACT: Square-planar bis(σ-fluorophenylacetylide) platinum(II) complexes [Pt(Me(3)SiC≡CbpyC≡C-SiMe(3))(C≡CC(6)H(4)F)(2)] (C≡CC(6)H(4)F-2 for 2, C≡CC(6)H(4)F-3 for 3, and C≡CC(6)H(4)F-4 for 4; Me(3)SiC≡CbpyC≡CSiMe(3)=5,5'-bis(trimethylsilylethynyl)-2,2'-bipyridine) were prepared and were characterized by spectroscopic and luminescence studies, and X-ray crystallography. The color and luminescence of crystalline complex 3 is specifically sensitive to CHCl(3) vapor to afford 140-180 nm of luminescence vapochromic redshift, which is useful for specific detection of CHCl(3) vapor. Complex 4 displays selective luminescence vapochromic properties to CH(2)Cl(2) and CHCl(3) vapors with a luminescence vapochromic shift response of ca. 150-200 nm. Interestingly, complexes 2-4 exhibit reversible, and naked-eye perceivable, mechanical stimuli-responsive color and luminescence changes. When solid species 2-4 are crushed gently or ground, the crystalline state is converted to an amorphous phase. Meanwhile, bright yellow-orange luminescence in the crystalline species is converted to dark red under UV light irradiation with 100-160 nm of mechanochromic shift response. A vapochromic or mechanochromic cycle was monitored by dynamic variations in emission spectra and X-ray diffraction (XRD) patterns. The halohydrocarbon vapor- or mechanical-grinding-triggered color and luminescence switches are most likely correlated to a shorted intermolecular Pt-Pt distance as that revealed in vapochromic species 4·0.5 CH(2)Cl(2) by X-ray crystallography, thus leading to an increased contribution from intermolecular Pt-Pt interaction as demonstrated by DTF computational studies.
    Chemistry 01/2011; 17(4):1171-83. · 5.93 Impact Factor
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    ABSTRACT: A 1,3-butadiyne-linked diruthenium complex 4 is successfully brought onto the gold surface in a lying flat mode to form self-assembled monolayers (SAMs) showing reversible multiple redox behaviors on the electrode surface. The diruthenium species with different oxidation states, particularly the Ru(2)(III,III) state which is unstable and impossible to isolate from the solution, can be detected by in situ IR spectroscopy.
    Chemical Communications 11/2010; 47(3):923-5. · 6.38 Impact Factor
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    Inorganic Chemistry 03/2010; · 4.59 Impact Factor
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    ABSTRACT: Reactions of 1,3-bis(2-pyridylimino)isoindoline (HL1), 1,3-bis(2-pyridylimino)benz(f)isoindoline (HL2), or 5,6-dihydro-2,3-diphenyl-5-(pyridin-2-ylimino)pyrrolo[3,4-b]pyrazin-7-ylidene)pyridin-2-amine (HL3) with Pt(tht)(2)Cl(2) (tht = tetrahydrothiophene) afforded the corresponding Pt(L)Cl complexes. A series of neutral platinum(II) alkynyl complexes Pt(L)(C[triple bond]CR) were prepared by reactions of the precursors Pt(L)Cl with alkynyl ligands through CuI-catalyzed platinum acetylide sigma coordination. Crystal structural determination of Pt(L3)Cl (3), Pt(L1)(C[triple bond]CPh) (4), and Pt(L1)(C[triple bond]CC(6)H(4)Bu(t)-4) (6) by X-ray crystallography revealed that the neutral platinum(Pi) complexes with monoanionic tridentate L ligands display more perfect square-planar geometry than that in platinum(II) complexes with neutral tridentate 2,2':6',2''-terpyridyl ligands. Both the Pt(L)Cl and Pt(L)(C[triple bond]CC(6)H(4)R-4) complexes exhibit low-energy absorption at 400-550 nm, arising primarily from pi --> pi*(L) intraligand (IL) and 5d(Pt) --> pi*(L) metal-to-ligand charge-transfer (MLCT) transitions as suggested from density functional theory calculations. They display bright-orange to red room-temperature luminescence in fluid dichloromethane solutions with microsecond to submicrosecond ranges of emissive lifetimes and 0.03-3.79% quantum yields, originating mainly from (3)IL and (3)MLCT excited states. Compared with the emissive state in Pt(L)Cl complexes, substitution of the coordinated Cl with C[triple bond]CC(6)H(4)R-4 in Pt(L)(C[triple bond]CC(6)H(4)R-4) complexes induces an obviously enhanced contribution from the (3)[pi(C[triple bond]CC(6)H(4)R-4) --> pi*(L)] ligand-to-ligand charge-transfer (LLCT) triplet state. The photophysical properties can be finely tuned by modifying both the L and alkynyl ligands. The calculated absorption and emission spectra in dichloromethane coincide well with those measured in a fluid dichloromethane solution at ambient temperature.
    Inorganic Chemistry 03/2010; 49(5):2210-21. · 4.59 Impact Factor
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    ABSTRACT: Eight new lanthanide(III) complexes, {Ln(hfac)3}2(μ-HMq)2 (Ln = Eu, 1; Tb, 2; Yb, 3; hfac- = hexafluoroacetylacetonate; HMq = 2-methyl-8-hydroxylquinoline), {Eu(hfac)2(H2O)-(OC6H4CN)}2(μ-HMq)2 (4, HOC6H4CN = 4-hydroxybenzonitrile), Er5(hfac)9(μ-HMq)2(μ4-CH3COO)2(μ3-CH3COO)(μ-CH3COO)(μ3-OH)2 (5), and Cr(Mq)(μ-HMq)- (μ3-OH)(μ-OH)(μ-CH3COO)2{Ln(hfac)2}2 (Ln = Eu, 6; Tb, 7; Er, 8), with bridging HMq in the μ-phenol mode were synthesized and characterized by X-ray crystallography, except for 6. Each LnIII center in 1-4 is surrounded by eight O donors to form a distorted square-antiprism, except that two O binding sites from one hfac- in 1-3 are displaced by one H2O and one OC6H4CN- in 4. Complex 5 could be viewed as a combination of two {Er(hfac)2}2(μ-HMq) moieties linked to a central ErIII ion through bridging acetates and μ3-OH, in which the central ErIII ion is nine-coordinated to give a distorted capped square antiprism whereas the other four ErIII ions are eight-coordinated with approximate square antiprisms. CrLn2 heterotrinuclear complexes 6-8 are ligated by one μ3-OH-, one μ-OH-, one bridging HMq, one chelating-bridgingMq-, and two μ-CH3COO-. These complexes display typical linelike emission from the corresponding lanthanide(III) ions with a microsecond range of lifetime. Introducing some amount of fluoride to these lanthanide(III) complexes induces significant enhancement in intensities and lifetimes for both visible and near-infrared (NIR) luminescence from lanthanide centers because strong F 3 3 3O-H interaction can effectively suppress the O-H vibrational radiationless process.
    Crystal Growth & Design 01/2010; 10:4101-4108. · 4.69 Impact Factor
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    ABSTRACT: Eight new lanthanide(III) complexes, {Ln(hfac)3}2(μ-HMq)2 (Ln = Eu, 1; Tb, 2; Yb, 3; hfac− = hexafluoroacetylacetonate; HMq = 2-methyl-8-hydroxylquinoline), {Eu(hfac)2(H2O)-(OC6H4CN)}2(μ-HMq)2 (4, HOC6H4CN = 4-hydroxybenzonitrile), Er5(hfac)9(μ-HMq)2(μ4-CH3COO)2(μ3-CH3COO)(μ-CH3COO)(μ3-OH)2 (5), and Cr(Mq)(μ-HMq)(μ3-OH)(μ-OH)(μ-CH3COO)2{Ln(hfac)2}2 (Ln = Eu, 6; Tb, 7; Er, 8), with bridging HMq in the μ-phenol mode were synthesized and characterized by X-ray crystallography, except for 6. Each LnIII center in 1−4 is surrounded by eight O donors to form a distorted square-antiprism, except that two O binding sites from one hfac− in 1−3 are displaced by one H2O and one OC6H4CN− in 4. Complex 5 could be viewed as a combination of two {Er(hfac)2}2(μ-HMq) moieties linked to a central ErIII ion through bridging acetates and μ3-OH, in which the central ErIII ion is nine-coordinated to give a distorted capped square antiprism whereas the other four ErIII ions are eight-coordinated with approximate square antiprisms. CrLn2 heterotrinuclear complexes 6−8 are ligated by one μ3-OH−, one μ-OH−, one bridging HMq, one chelating-bridging Mq−, and two μ-CH3COO−. These complexes display typical linelike emission from the corresponding lanthanide(III) ions with a microsecond range of lifetime. Introducing some amount of fluoride to these lanthanide(III) complexes induces significant enhancement in intensities and lifetimes for both visible and near-infrared (NIR) luminescence from lanthanide centers because strong F···O−H interaction can effectively suppress the O−H vibrational radiationless process.
    Crystal Growth & Design - CRYST GROWTH DES. 01/2010; 10(9):4101-4108.
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    ABSTRACT: Multifunctional heteropentanuclear Al(3)Ln(2) (Ln = Nd, Eu, Yb) clusters with a novel structure exhibit significantly fluoride-enhanced lanthanide emission intensity and lifetime in both solid state and solution as well as unusual white-light emitting for an Al(3)Eu(2) complex.
    Chemical Communications 12/2009; · 6.38 Impact Factor
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    ABSTRACT: The reaction of 1,2-bis(5-(diphenylphosphino)-2-methylthien-3-yl) cyclopentene (PPh(2)-DTE-PPh(2)) with the triruthenium cluster precursor [Ru(3)O(OAc)(6)(py)(2)(CH(3)OH)](PF(6)) (1) gave monomeric or dimeric derivatives [Ru(3)O(OAc)(6)(py)(2){PPh(2)-DTE-PPh(2)}](PF(6)) ([2]PF(6)) and [{Ru(3)O(OAc)(6)(py)(2)}(2){mu-PPh(2)-DTE-PPh(2)}](PF(6))(2) ([3]PF(6)). Reduction of [2](+) and [3](2+) afforded one- or two-electron-reduced neutral products Ru(3)O(OAc)(6)(py)(2){PPh(2)-DTE-PPh(2)} (2) and {Ru(3)O(OAc)(6)(py)(2)}(2){mu-PPh(2)-DTE-PPh(2)} ()3, respectively. These triruthenium complexes show remarkable photochromism through photochemical ring-closing (UV light irradiation) and ring-opening (Vis light irradiation) processes as well as electrochromic properties through oxidation/reduction in the triruthenium cluster. Both the photochromic and electrochromic properties of 2 and 3 are highly reversible.
    Dalton Transactions 12/2009; · 3.81 Impact Factor
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    ABSTRACT: A series of oxo-centred triruthenium-acetate complexes with valence III,III,II were prepared by reactions of [Ru3(III,III,III)]+ precursor [Ru3O(OAc)6(py)2(CH3OH)]+ (1) with 3-chloro-6-(pyrazol-1-yl)pyridazine (cppd), 3-chloro-6-(3,5-dimethylpyrazol-1-yl)pyridazine (cmppd), 3,6-bis(pyrazol-1-yl)pyridazine (ppd), 3,6-bis(3,5-dimethylpyrazol-1-yl)pyridazine (mppd) or 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine (bptz). When neutral Ru3(III,III,II) precursor Ru3O(OAc)6(CO)(CH3OH)2 (2) was utilized, a stable low-valence Ru3(III,II,II) derivative complex was successfully isolated. As established through crystal structural analyses, they were derived from 1 or 2 by substitution of the axial methanol and one of six bridging acetates in the parent Ru3(mu3-O)(mu-OAc)6 cluster core as well as one axial pyridine in some cases. As revealed by electrochemical and spectroscopic studies, substituting one of the six bridging acetates in the parent Ru3(mu3-O)(mu-OAc)6 cluster core significantly modifies the electronic and redox characteristics. Compared with those for the parent compound [Ru3O(OAc)6(py)3]+, triruthenium-based redox potentials of these derivatives show remarkable positive shifts.
    Dalton Transactions 10/2009; · 3.81 Impact Factor
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    ABSTRACT: Platinum(II) complex [Pt(Me(3)SiC[triple bond]CbpyC[triple bond]CSiMe(3))(C[triple bond]CPh)(2)] (1) with 5,5-bis(trimethylsilylethynyl)-2,2'-bipyridine (Me(3)SiC[triple bond]CbpyC[triple bond]CSiMe(3)) and phenylacetylene (PhC[triple bond]CH) exhibits unusual luminescence vapochromism to volatile organic compounds (VOCs) including CH(2)Cl(2), CHCl(3), and CH(3)I, which is useful for detection of volatile halohydrocarbon with one carbon atom and molecular weight less of than 150. Crystal structural determination of 1, 1 x CHCl(3), 1 x 1/2(CH(2)ClCH(2)Cl), and 1 x 1/2(toluene) revealed a staggered packing for 1 x CHCl(3) whereas there was an antiparallel packing for other three structures in stacking of planar platinum(II) moieties. The Pt...Pt distance is 3.302(1) A in 1 x CHCl(3), whereas it is >4.0 A in the other three structures. Complex 1 displays bright orange luminescence in dichloromethane solution, arising from pi(phenylacetylide)-->pi*(Me(3)SiC[triple bond]CbpyC[triple bond]CSiMe(3)) (3)LLCT and d(Pt)-->pi*(Me(3)SiC[triple bond]CbpyC[triple bond]CSiMe(3)) (3)MLCT triplet states which are supported by DFT calculation. The solid-state emission occurs at approximately 762 nm for 1 x VOC (VOC = CH(2)Cl(2), CHCl(3), and CH(3)I), whereas it was at approximately 562 (603sh) or 603 (562sh) nm for 1 and other 1 x VOC, corresponding to a vapochromic response shift of approximately 160-200 nm. The dramatic vapochromism and vapoluminescence of 1 to the vapor of CH(2)Cl(2), CHCl(3), or CH(3)I are induced by a reversible conversion of the emissive state from (3)MLCT/(3)LLCT character to (3)MMLCT/(3)LLCT state.
    Inorganic Chemistry 09/2009; 48(21):10202-10. · 4.59 Impact Factor
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    ABSTRACT: A platinum(II) complex of 5,5'-bis(trimethylsilylethynyl)-2,2'-bipyridine displays unusually reversible colour and luminescence changes when exposed to specific organic vapours, correlated well with Pt...Pt distances as well as pi-pi and C-H...(C[triple bond]C) interactions in the stacking of square-planar platinum(II) moieties.
    Chemical Communications 08/2009; · 6.38 Impact Factor

Publication Stats

334 Citations
219.56 Total Impact Points

Institutions

  • 2003–2013
    • Northeast Institute of Geography and Agroecology
      • State Key Laboratory of Structural Chemistry
      Beijing, Beijing Shi, China
  • 2005–2010
    • Chinese Academy of Sciences
      • State Key Laboratory of Structural Chemistry
      Peping, Beijing, China