螺旋共轭化合物及其相对应的多烯及联苯连接化合物的结构、光谱和二阶非线性光学性质的比较研究

用ＡＭ１和ＩＮＤＯ／ＣＩ方法研究了螺旋共轭化合物Ⅰ的结构和电子光谱,并在此基础上,用完全态求和公式（ＳＯＳ,自编程序）计算了二阶非线性光学系数βμ．把结果与其对应的多烯及联苯连接的化合物Ⅱ和Ⅲ用同一方法计算得到的结果加以比较,发现螺旋共轭化合物Ⅰ的二阶非线性光学系数βμ虽然小于Ⅱ和Ⅲ,但其透明性均比化合物Ⅱ和Ⅲ好     

螺旋共轭化合物及其相对应的多烯及联苯连接合物的结构,？…

用ＡＭ１和ＩＮＤＯ／ＣＩ方法研究了螺旋共轭化合物Ｉ的结构和电子光谱，并在此基础上，用完全态求和公式（ＳＯＳ，自编程序）计算了二阶非线性光学系数βμ，把结果与其对应的多烯及联苯连接的化合物Ⅱ和Ⅲ用同一方法计算得到的结果加以比较，发现螺旋共轭化合物Ⅰ的二阶非线性光学系数βμ虽然小于ⅡⅢ，但其透明性均比化合物Ⅱ和Ⅲ好。     

两种C60双氰衍生物的结构,光谱和二阶非线性光学性质？…

用ＩＮＤＯ／２和ＩＮＤＯ／ＳＣＩ方法计算了Ｃ６０（Ｃ＝Ｎ）２和Ｃ６０Ｃ（Ｃ＝Ｎ）２基态电子结构和电子光谱,所得结果与实验值基本一致。在此基础上,用ＺＩＮＤＯ＿ＳＯＳ方法计算了两个分子的二阶非线性光学系数βｊｋ和βμ,并对其结果进行了分析和讨论。结果表明,乙氰基与Ｃ６０相连的两种碳笼衍生物都有大的非线性光学系数,Ｃ６０Ｃ（Ｃ＝Ｎ）２是有希望的非线性光学材料。     

C59(C6H4CH3)N的结构、UV-VIS光谱、NMR谱以及非线性光学性质的理论研究

用ＩＮＤＯ 系列方法对由（Ｃ５９Ｎ）２和甲苯合成的衍生物Ｃ５９ （Ｃ６Ｈ４ＣＨ３）Ｎ进行了理论研究,得到了分子的稳定构型,表明Ｃ５９（Ｃ６Ｈ４ＣＨ３）Ｎ具有Ｃｓ对称性。以优化构型为基础讨论了分子的ＵＶ－ＶＩＳ光谱、ＮＭＲ谱,结果与实验符合得很好。还计算了Ｃ５９－（Ｃ６Ｈ４ＣＨ３）Ｎ的二阶非线性光学系数βμ,结果表明这种分子具有较大的二阶非线性光学系数。     

C59（C6H4CH3）N的结构,UV—VIS光谱,NMR谱以及非线性光学性质的理论 …

用ＩＮＤＯ系列方法对由（Ｃ５９Ｎ）２和甲苯合成的衍生物Ｃ５９（Ｃ６Ｈ４ＣＨ３）Ｎ进行了理论研究，得到了分子的稳定构型，表明Ｃ５９（Ｃ６Ｈ４ＣＨ３）Ｎ具有Ｃｓ对称性。以优化构型为基础讨论了分子的ＵＶ－ＶＩＳ光谱、ＮＭＲ谱，结果瑟实验符合得很好。还计算了Ｃ５９－（Ｃ６Ｈ４ＣＨ３）Ｎ的二阶非线性光学系数βμ，结果表明这种分子具有较大的二阶非线性光学系数。     

C59（C6H4OCH3）N的结构,光谱和二阶非线性光学性质的理？…

用ＩＮＤＯ系列方法对由（Ｃ５９Ｎ）２和苯甲醚合成的衍生物Ｃ５９（Ｃ６Ｈ４ＯＣＨ３）Ｎ进行了理论研究,得到了分子的稳定构型。结果表明,Ｃ５９（Ｃ６Ｈ４ＯＣＨ３）Ｎ具有Ｃｓ对称性,以优化构型为基础讨论了分子的ＵＶ－Ｖｉｓ光谱、ＮＭＲ谱线数,结果与实验符合得很好,本文还计算了Ｃ５９（Ｃ６Ｈ４ＯＣＨ３）Ｎ的二阶非线性光学系数βμ,结果表明这种物质具有较大的二阶非线性光学系数。     

新型非线性光学材料的分子设计: 系列螺旋共轭化合物的结构、光谱及二 阶非 线性光学性质的理论研究

采用AM1和ZINDO系列方法研究了螺旋共轭分子2,2'-螺二茚-1,1',3,3'-四酮及其腈基衍生物的几何构型,研究了各分子的稳定构型,并以稳定为基础,计算了这些分子的电子光谱,二阶非线性光学系数βμ,β0,及电荷转移,考察了取代基变化对βμ的影响,计算结果表明所设计分子兼具较大的二阶非线性光学系数和较高的透过率,有希望成为一类新型的二阶非线性光学材料。     

螺旋共轭分子2，2‘—螺二茚—1，1’,3,3‘—四酮及其衍生物的二阶非线性光学性质与分子结构关系的研究

采用AM1和ZINDO系列方法研究了螺旋共轭分子2，2‘-螺二茚－1，1‘,3,3‘-四酮及其含氮衍生物的几何构型和各分子的稳定构型，并以稳定构型为基础，计算了这些分子的电子光谱、二阶非线性光学系数βμ，β0为电荷转移，考察了取代堪变化对βμ的影响。计算结果表明，所设计分子兼具较大的二阶非线性光学系数和较高的透过率，有希望成为一类新型的二阶非线性光学材料。     

螺旋共轭化合物的结构光谱和二阶非线性光学性质的理论研究

用ＡＭ１和ＩＮＤＯ／ＣＩ方法研究了螺旋共轭化合物（ｎ＝１～５）的结构和电子光谱,并在此基础上,用完全态求和公式（ＳＯＳ）自编程序计算了二阶非线性光学系数,从理论上研究了１,４－环己二烯环数增加时对二阶非线性光学性质的影响     

若干有机非线性光学材料的分子设计及三阶非线性光学性质的理论研究

以ＩＮＤＯ／ＳＣＩ方法为基础,利用完全态求和（ＳＯＳ）公式,计算了若干有机非线性光学材料分子的三阶非线性光学系数γ（－ω; ω, －ω, ω）和γ（０; ０, ０, ０）,研究了γ与分子骨架、给电子取代基、噻吩环数目即：共轭分子链长的关系。设计了较大γ的新型非线性光学材料分子。     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

Toward new camptothecins. Part 6: Synthesis of crucial ketones and their use in Friedländer reaction

In the context of the preparation of camptothecin and luotonin A analogs, the synthesis of some key keto-precursors and their use in Friedländer condensation are described. This paper also focuses on the stability of these keto intermediates and emphasizes the major differences between indolizinones and pyrroloquinazolinones series. Noteworthy is also the report of some original structures isolated as by-products of some experiments.     

CoFe2O4自形成磁性液体场致结构化对磁化的影响

The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.     

Highly regioselective Buchwald–Hartwig amination at C-2 of 2,4-dichloropyridine enabling a novel approach to 2,4-bisanilinopyridine (BAPyd) libraries

The highly regioselective Buchwald–Hartwig amination at C-2 of the cheap and readily accessible reagent, 2,4-dichloropyridine with a range of anilines and heterocyclic amines is described. This new methodology is robust and provides a facile access to 4-chloro-N-phenylpyridin-2-amines on 0.25 mol scale. These intermediates undergo a further Buchwald–Hartwig amination at higher temperature to enable rapid exploration of the chemical space at C-4 and to provide a library of 2,4-bisaminopyridines.     

KMnO4-mediated oxidative CN bond cleavage of tertiary amines: Synthesis of amides and sulfonamides

KMnO₄-mediated oxidative CN bond cleavage of tertiary amines producing secondary amine was introduced, which was trapped by electrophiles (acyl chloride and sulfonyl chloride) to form amides and sulfonamides. The reaction could take place at mild condition, tolerating a wide range of function groups and affording products in moderate to excellent yields.     

Chemistry of heterocyclic compounds at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, over 50 years (Review)

The review contains a concise historical account and information on the most significant researches undertaken by the staff at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences on the Chemistry of Heterocyclic Compounds. Dedicated to Academician of the Russian Academy of Sciences B. A. Trofimov on his 70th jubilee. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1443–1502, October, 2008.     

Sulfur-directed metal-free and regiospecific methyl C(sp3)–H imidation of thioanisoles

Regiospecific and direct imidation of the methyl C(sp³)–H bond of thioanisoles is realized under mild and metal-free conditions with N-fluorobis(benzenesulfonyl)imide as an oxidant and nitrogen source. Proposed mechanism suggests that thionium ion intermediates and a Pummerer-type reaction are involved. The imidation has advantages such as high step-economy, excellent functionality tolerance, and regiospecificity, giving structurally diverse imidation products.     

Selective syntheses of 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones via temperature-dependent Rh(II)-carbenoid-mediated 2H-azirine-ring expansion

The Rh(II)-catalyzed reaction of 2-carbonyl-substituted 2H-azirines with ethyl 2-cyano-2-diazoacetate or 2-diazo-3,3,3-trifluoropropionate provides an easy access to 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones. These compounds can be selectively prepared from the same starting material using temperature as the only varied parameter. The 2-azabuta-1,3-diene intermediate, a common precursor for both heterocyclic products, isomerizes into 2H-1,3-oxazine under kinetic control, while 1H-pyrrol-3(2H)-one is the sole product of the reaction at elevated temperatures. According to DFT-calculations a one-atom oxazine ring contraction involving ring-opening to a 2-azabuta-1,3-diene intermediate, followed by a 1,5- and 1,2-prototropic shift leads to the consecutive formation of imidoylketene and azomethine ylide, which then further undergo cyclization to the pyrrole derivative.     

Synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives

Different approaches for the synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives from simple amino acids have been investigated. A library of 33 precursors for the preparation of N-hydroxy pyrazinones was obtained in moderate to good yields.