作者机构：
[Deng Yi-Fang; Chen Man-Sheng; Kuang Dai-Zhi; Zhang Chun-Hua; Tang Si-Ping] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.
通讯机构：
[Zhang Chun-Hua] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Hunan, Peoples R China.
关键词：
锰配合物;晶体结构;6-二氯苯甲酸;水热合成
摘要：
A dinuclear manganese(II) complex, [Mn-2(L-1)(2)(phen)(4)]center dot(ClO4)(2) (1), has been synthesized and structurally characterized (HL1=2,6-dichlorobenzoic acid, phen=1,10-phenanthroline). It crystallizes in triclinic system, space group P1 with a=1.1123(4) nm, b=1.378 2(4) nm, c=2.085 7(3) nm, alpha=93.768(2)degrees, beta=90.606(10)degrees, gamma=95.606(3)degrees, V=3.174 8(15) nm(3), Z=2, C62H38Cl6Mn2N8O12, M-r=1 409.58, D-c=1.475 g.cm(-3), mu=0.718 mm(-1), F(000)=1 428, R= 0.064 3, wR =0.138 3. In the crystal the manganese atom is six-coordinated by two oxygen atoms from two different 2,6-dichlorobenzolate molecules and four nitrogen atoms from two 1,10-phenanthroline molecules, completing an octahedral geometry.
期刊：
Plant Systematics and Evolution,2008年274(1-2):17-23 ISSN：0378-2697
通讯作者：
Xia, N. H.
作者机构：
[Cao, L. M.; Xia, N. H.; Deng, Y. F.] Chinese Acad Sci, S China Bot Garden, Inst Econ Bot, Guangzhou 510650, Guangdong, Peoples R China.;[Cao, L. M.] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China.;[Cao, L. M.] Hengyang Normal Univ, Dept Life Sci, Hengyang 421008, Hunan, Peoples R China.
通讯机构：
[Xia, N. H.] C;Chinese Acad Sci, S China Bot Garden, Inst Econ Bot, Guangzhou 510650, Guangdong, Peoples R China.
摘要：
Embryological characters of Handeliodendron bodinieri (Sapindaceae) are reported for the first time. Anthers are tetrasporangiate. Cytokinesis in microsporocyte meiosis is of the simultaneous type and the microspore tetrads are tetrahedral. The tapetum is secretory and parietal. Mature pollen is bicellular. The ovary is trilocular. There are two ovules in each locule. The placenta is axile. The ovule is crassinucellate, bitegmic and hemitropous, without hypostase when mature. The development of the embryo sac is of the Polygonum type. The systematic significance of the embryological characters of Handeliodendron bodinieri is discussed.
摘要：
We used a carbon paste electrode modified with multi-walled carbon nanotubes as a working electrode and studied the electrochemical behavior of zirconium-alizarin red S complex on it. It was found that the modified electrode exhibited a significant catalytic effect toward the reduction of free alizarin red S and the complex. The second derivative linear scan voltammograms of the complex were recorded by a polarographic analyser from 0 to −1000 mV (vs. SCE), and it was found that the complex can be adsorbed on the surface of the modified electrode, yielding a peak at about −470 mV, corresponding to the reduction of alizarin red S in the complex. The linear range was found to be 2.0 × 10−11–8.0 × 10−7 mol L−1, and the detection limit was 1.0 × 10−11 mol L−1 (S/N = 3) for 3 min accumulation. The procedure was successfully applied to the determination of trace amounts of zirconium in the ore samples.
摘要：
A carbon paste electrode modified with multi-walled carbon nanotubes (MWCNT) was prepared and the determination of ultra trace amount of zirconium based on the anodic adsorptive voltammetry of the zirconium-calcium-alizarin red S mix-polynuclear complex is described in this paper for the first time. The results showed that the sensitivity and the selectivity of the method are excellent. The second derivative linear scan voltammograms of the complex were recorded by polarographic analyzer from 200 to 1200 mV (vs. SCE) and it was found that the complex can be adsorbed on the surface of the electrode, yielding a peak at about 840 mV, corresponding to the oxidation of ARS in the complex. The peak current increases linearly with Zr (IV) concentration in the range of 6.0×10−12-6.0×10−11 mol·L−1 (accumulation time 120 s), 6.0×10−11-2.0×10−9 mol·L−1 (accumulation time 90 s) and 2.0×10−9-1.0×10−7 mol·L−1 (accumulation time 60 s) and the detection limit (S/N = 3) is 2.0×10−12 mol·L−1 (accumulation time 180 s). The procedure has been successfully applied to the determination of zirconium in the ore samples.
摘要：
The title compound was prepared by the reaction of di(2,4,6-trichlorobenzyl) stannic chloride with quinoline-2-formate and characterized with elemental analysis, 1H NMR, IR and X-ray diffraction methods. It crystallizes in monoclinic, space group P2_1/n with a = 1.3138(3), b = 1.8756(4), c = 1.4599(3) nm, β = 92.731(3)°, V = 3.5933(12) nm~3, Z = 4, D_c = 1.795 g/cm~3, μ(MoKα) = 1.425 mm~(-1), F(000) = 1920, R = 0.0778, w_R = 0.2286 (for I > 2σ(I)) and R = 0.0932, w_R = 0.2415 (for all data). The independent reflections were 6359, among which 5030 were observed (I > 2 σ(I)) and used in the succeeding refinement. Structural analysis indicates that Sn is in a distorted octahedral coordination environment, and a three-dimensional network could be observed via intermolecular hydrogen bonds. Finally, the stability, frontier orbital composition and energy of the title compound were discussed with Lanl2dz basis set and G98W program.
摘要：
A novel Mn(II) complex Mn-2(phen)(2)(p-MBA)(4)(H2O) has been hydrothermally synthesized by the reaction of p-methyl benzoic acid (p-MBA) with 1,10-phenanthroline (phen). Crystal data for this complex: monoclinic, space group C2/c, a = 2.3328(3), b =1.5549(2), c = 1.5557(2) nm, beta = 121.726(2)degrees, V = 4.7997(11) nm(3), M-r = 1028.85, D-c = 1.424 g/cm(3), Z = 4, F(000) = 2128, mu(MoKa) = 0.590mm(-1), GOOF = 1.060, R = 0.0333 and wR = 0.0767. In the crystal, each Mn(II) ion is coordinated by two nitrogen atoms from one o-phenanthroline molecule, three oxygen atoms from three p-methyl benzoic acids and one oxygen atom from one water molecule, giving a six-coordinate distorted octahedral coordination geometry. Two neighboring Mn(II) ions are bridged by two p-methyl benzoic acid groups and one water molecule, and their end positions are respectively coordinated by one 1,10-phenanthroline and one p-methyl benzoic acid molecule, giving a binuclear cage structure, of which the Mn(II)center dot center dot center dot Mn(II) distance is 0.3502 nm.
摘要：
A one-dimensional chain coordination polymer [Cu(phen)(2,4,6-TMBA)(2)(H2O)](n) has been synthesized by reacting 2,4,6-trimethyl-benzoic acid, 1,10-phenanthroline and Cu(II) perchlorate and its structure was characterized. Crystal data for this complex: tetragonal, space group 14(1), a = 2.0293(3), b = 2.0293(3), c = 1.3758(2) nm, alpha = beta = gamma = 90 degrees, V = 5.6657(13) nm(3), D-c= 1.379 g/cm(3), Z = 8, mu(MoK alpha) = 0.815 mm(-1), M-r = 588.14, F(000) = 2456, S = 1.047, R = 0.0459 and wR = 0.1053. The crystal structure shows that two neighboring Cu(II) ions are linked together by one bridging-chelating 2,4,6-trimethyl-benzoic group, forming a one-dimensional chain structure. Each Cu(II) ion is coordinated with two nitrogen atoms from one 1,10-phenanthroline molecule, three oxygen atoms from three 2,4,6-trimethyl-benzoic acid molecules and one oxygen atom from one water molecule, giving a six-coordinate distorted octahedral coordination geometry. The cyclic voltammetry behavior of the complex was also investigated.
摘要：
A cadmium complex [Cd(cinnamato) 2(Phen)] 2 was synthesized by the reaction of cinnamic acid, phenanthroline (phen), and Cd(ClO 4) 2·6H 2O. It crystallizes in triclinic, space group P1, with a=1.142 1(13) nm, b=1.1576(13) nm, c=2.106 1(2) nm, α=80.307(2)°, β=77.334(2)°, γ=71.630(2)°, V =2.563 4(5) nm 3, D c=1.521 g·cm -3, Z=2, M r=586.90, μ=0.891 mm -1, F(000)=1 184, the final R =0.031 7, wR =0.067 5. The crystal structure shows that the cadmium ion is coordinated with two nitrogen atoms from one phen molecule and five oxygen atoms respectively from three cinnamic acids, giving a pentagonal bipyramid coordination geometry. CCDC: 687380.
关键词：
environmental change;reticulate red clay;TL/OSL dating;mid-Pleistocene;Shangshan culture;Zhejiang
摘要：
At about 173 ka BP of the late period of mid-Pleistocene, the second terrace of the river had been formed as a result of uplift happening in Shangshan area because of the climate, sea level change and tectonic action. Between 173–75 ka BP, aeolian deposited on the terrace, a layer of reticulate red clayey soil about 80–100 cm thick deposited and developed under the warmer and higher temperature. In the last glacial period, the drop of the temperature and the decrease of the precipitation induced the dust-storms increased, A layer of Xiashu loess about 1.0–1.5 m thick accumulated on Shangshan terrace in the last glacial, which has the reticulate red clayey soil buried. At the beginning of the Holocene (11500 a BP-), temperature went higher gradually and precipitation got more, the pre-persons moved on the Shangshan terrace (11,400–8600 a BP), which is one of the most important archaeological sites, and can connect the paleolithic culture with Neolithic culture. It could be assumed from the results that the lower reaches of the Yangtze River are the home of rice cultivation, too. The lower place to the west of the Shangshan site experienced the two cycles process of the fluvial facies and the lacustrine facies, indicating that the water source of the pre-historical Shangshan is the river water or lake water. Two AMS 14C age proved the water source disappeared more than 1000 years ago.
摘要：
A new cadmium complex [Cd(phen)3]-(ClO4) 2-(α-FRA)(H2O)3 was prepared by self-assembly of α-furoic acid, 1,10-phenanthroline (phen), and cadmium perchlorate. It crystallizes in the monoclinic system, space group P2 1/n, with a = 1.28130(15), b = 2.5957(3), c = 1.35449(16) nm, β = 109.395(2)°, V = 4.2492(9) nm3 Dn = 1.491 g/cm 3, Z = 4, F(000) = 1926, GOOF = 1.023, the final R = 0.0729 and wR - 0.2086. The crystal structure analysis indicates that the cadmium ion is coordinated with six nitrogen atoms from six 1, 10-phenanthroline molecules, giving a distorted octahedral coordination geometry. The cyclic voltametric behavior of the complex was also investigated.
