期刊：
Linear Algebra and its Applications,2015年483:293-308 ISSN：0024-3795
通讯作者：
Zhang, Jun
作者机构：
[Szokol, Patricia] Univ Debrecen, Inst Math, MTA DE Lendulet Funct Anal Res Grp, H-4010 Debrecen, Hungary.;[Tsai, Ming-Cheng] Natl Sun Yat Sen Univ, Dept Appl Math, Kaohsiung 80424, Taiwan.;[Zhang, Jun] Cent China Normal Univ, Sch Math & Stat, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Zhang, Jun] C;Cent China Normal Univ, Sch Math & Stat, Wuhan 430079, Hubei, Peoples R China.
摘要：
Three cadmium(II) coordination compounds were synthesized via controlling the pH in the in situ [2 + 3] cycloaddition reaction of CdSO4, 4-cyanopyridine, and sodium azide under hydrothermal treatment. Mononuclear 3 was obtained at weak acid solution pH 6.0 similar to 7.0, but 3-D coordination polymers 1 and 2 were preferred in weak alkaline conditions from pH 7.0 to 9.0. Hydrothermal reactions of CdSO4, 4-cyanopyridine, and sodium azide yield three metal coordination compounds via controlling the pH, [Cd-2(4-ptz)(SO4)(OH)(H2O)(2)](H2O) (1) [Cd-2(4-ptz)(SO4)(OH)(H2O)](n) (2), and known [Cd-2(4-ptz)(2)(H2O)(4)](H2O)(2) (3) (4-ptz=5-(4-pyridyl)tetrazole). The in situ [2+3] cycloaddition reaction of nitrile and azide in the presence of Cd(II) produces the multidentate 4-ptz in these compounds. X-ray diffraction results indicate that metal centers in 1 are linked by 4-ptz(-), and OH- in their respective (5)-, (2)-, (3)-bridging modes, forming a 3-D coordination polymer. For 2, although the same raw materials are used, the component anions are linked to Cd(II) centers in completely different ways, i.e. for 4-ptz(-) in (3)-, n (5)-, and OH- in (3)-bridging modes, forming another 3-D coordination network. Thermal stabilities and photoluminescent properties of 1 and 2 have also been investigated.
摘要：
A three-dimensional quantitative structure–activity relationship (3D-QSAR) study was performed on two different chemical series, which have great herbicidal activity, employing comparative molecular field analysis (CoMFA) and comparative molecular similarity indices (CoMSIA) techniques to further investigate the structural requirement for the dicotyledonous stem inhibition. The optimal CoMFA and CoMSIA models obtained for the training set were all statistically significant with cross-validated coefficients (q2) of 0.702, 0.726 and conventional coefficients (R2) of 0.980, 0.963, respectively. These models were validated by a set of six molecules that were not included in the training set. The CoMFA yielded comparable models for phosphonate and phosphinate derivatives highlighting the significance of steric and electrostatic fields toward dicotyledonous stem inhibitory activity. The CoMSIA models indicated the importance of electrostatic and hydrophobic fields toward dicotyledonous stem inhibitory activity. The CoMSIA steric and electrostatic field maps are in accordance with field distribution of CoMFA maps and consistent with structure–activity relationships.
期刊：
Journal of Heterocyclic Chemistry,2015年52(4):1260-1263 ISSN：0022-152X
通讯作者：
He, Hongwu
作者机构：
[He, Hongwu] Cent China Normal Univ, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan, Peoples R China.;Cent China Normal Univ, Coll Chem, Wuhan, Peoples R China.
通讯机构：
[He, Hongwu] C;Cent China Normal Univ, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan, Peoples R China.
期刊：
Journal of Heterocyclic Chemistry,2015年52(3):647-652 ISSN：0022-152X
通讯作者：
Ren, Qingyun
作者机构：
[He, Hongwu; Gu, Yucheng; Ren, Qingyun] Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Peoples R China.;[Li, Baoju; Xia, ShiYan] Chinese Acad Agr Sci, Inst Vegetables & Flowers, Beijing 100081, Peoples R China.;[Gu, Yucheng] Syngenta Jealotts Hill Int Res Ctr, Bracknell RG42 6EY, Berks, England.;[Ren, Qingyun] Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, 152 Luoyu Rd, Wuhan 430079, Peoples R China.
通讯机构：
[Ren, Qingyun] C;Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, 152 Luoyu Rd, Wuhan 430079, Peoples R China.
摘要：
Fifteen novel 2-alkylamino-3-aryl-8-cyano-5-methyl-7-(methylthio)-pyrido[4,3-d]pyrimidin-4(3H)-ones 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i, 6j, 6k, 6l, 6m, 6n, 6o were designed and have been successfully synthesized via tandem aza-Wittig and annulation reactions with the corresponding iminophosphoranes 4, aryl isocyanate, and amines in good yields. Their structures were clearly verified by IR spectroscopy, 1H-NMR spectroscopy, EI-MS, and elemental analysis, and in the case of compound 6i, further analyzed by single-crystal X-ray diffraction. The preliminary results of an in vivo bioassay showed that some compounds display moderate antifungal activity.
期刊：
ANNALES ACADEMIAE SCIENTIARUM FENNICAE-MATHEMATICA,2015年40(1):135-148 ISSN：1239-629X
通讯作者：
He, Xing-Gang
作者机构：
[He, Xing-Gang] Cent China Normal Univ, Sch Math & Stat, Wuhan 430079, Peoples R China.;[Liu, Chun-Tai] Wuhan Polytech Univ, Sch Math & Comp Sci, Wuhan 430023, Peoples R China.
通讯机构：
[He, Xing-Gang] C;Cent China Normal Univ, Sch Math & Stat, Wuhan 430079, Peoples R China.
关键词：
Hausdorff dimension;Infinite bernoulli convolution;Moran function system;Rademacher series
摘要：
Let {cn}∞ n=1 be a sequence of complex numbers. In this paper we answer when the range of Σ ∞ n=1 ±cn is dense or equal to the complex plane. Some examples are given to explain our results. As its application, we calculate the Hausdorff dimension of the level sets of a Rademacher series with complex coefficients.
作者机构：
[Li, Gong-bao] Cent China Normal Univ, Hubei Key Lab Math Sci, Wuhan 430079, Peoples R China.;Cent China Normal Univ, Sch Math & Stat, Wuhan 430079, Peoples R China.
通讯机构：
[Li, Gong-bao] C;Cent China Normal Univ, Hubei Key Lab Math Sci, Wuhan 430079, Peoples R China.
摘要：
In this paper, we study the existence of multiple solutions to the following nonlinear elliptic boundary value problem of p-Laplacian type: {-Delta(p)u = f(x,u), x is an element of Omega, u = 0, x is an element of partial derivative Omega, where 1 < p < infinity, Omega subset of R-N is a bounded smooth domain, Delta(p)u = div (vertical bar Du vertical bar(p-2)Du) is the p-Laplacian of u and f: Omega x R -> R satisfies lim(vertical bar t vertical bar ->infinity) f(x, t)/vertical bar t vertical bar(p-2)t = l uniformly with respect to x is an element of Omega, and l is not an eigenvalue of -Delta(p) in W-0(1,p)(Omega) but f(x, t) dose not satisfy the Ambrosetti-Rabinowitz condition. Under suitable assumptions on f (x, t), we have proved that (*) has at least four nontrivitial solutions in W-0(1,p) (Omega) by using Nonsmooth Mountain-Pass Theorem under (C)(c) condition. Our main result generalizes a result by N. S. Papageorgiou, E. M. Rocha and V. Staicu in 2008 (Calculus of Variations and Partial Differential Equations, 33: 199-230(2008)) and a result by G. B. Li and H. S. Zhou in 2002 (Journal of the London Mathematical Society, 65: 123-138(2002)).
摘要：
Let A be an abelian group with vertical bar A vertical bar >= 4. Suppose that G is a 3-edge-connected simple graph on n >= 19 vertices. We show in this paper that if max{d(x), d(y),d(z)} >= n/6 for every 3-independent vertices {x, y, z} of G, then either G is A-connected or G can be T-reduced to the Petersen graph, which generalizes the result of Zhang and Li (Graphs and Combin., 30 (2014), 1055-1063).
摘要：
Two macrocyclic compounds containing propargylamine backbone have been synthesised via Mannich three-component reaction. The macrocycle 3a shows the intramolecular self-folding conformation. The macrocycle 3b self-assembles via multiple weak interactions to form a multiple double-helical system, which shows the alternate helical handedness.
作者：
Han Xie;Hu Fang;Ge Haojie;Liu Shenghua;Yin Jun*
期刊：
化学进展,2015年27(6):675-686 ISSN：1005-281X
通讯作者：
Yin Jun
作者机构：
[Ge Haojie; Yin Jun; Liu Shenghua; Hu Fang; Han Xie] Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
通讯机构：
[Yin Jun] C;Cent China Normal Univ, Coll Chem, Minist Educ, Key Lab Pesticide & Chem Biol, Wuhan 430079, Peoples R China.
摘要：
Reactions of the diorganotin(IV) dichlorides with cyclohexanecarboxylate ligands yielded four new dimeric ladder-like tetraorganostannoxanes formulated as [R4Sn2(C6H11COO)(mu(3)-O)(mu(3)-OH)](2)[R = Et (1), Bu-n (2), (n)Oct (3) and Ph (4)]. All these complexes were characterized by elemental analysis, IR, NMR (H-1, C-13, Sn-119) spectra and in one case by X-ray diffraction analysis. The crystal structure of 1 reveals the formation of the tetranuclear species contains a planar Sn4O4 core, consisting of three adjacent rhombs with bridging oxo and hydroxyl ligands. The central tin atoms are five-coordinated to assume a distorted trigonal bipyramidal configuration and the OH ligands act as monodentate O-bound planar. 2 exhibits good antitumor activity against KB cells (IC50 = 0.90 mu M) and 4 shows significant antibacterial activity against Gram-positive bacteria Staphylococcus aureus (MIC = 0.147 mu g/ml), both being even higher than those of clinically used drugs. (C) 2015 Elsevier Ltd. All rights reserved.
