4-[2-(9,9-二辛基-9H-芴-2-)乙烯基]苯胺的合成及其光学性质

以2-溴芴、溴代正辛烷和对硝基苯乙烯为主要原料,通过烷基化反应、Heck反应和还原反应合成了新化合物4-[2-(9,9-二辛基-9H-芴-2-]乙烯基)苯胺(5),其结构经1H NMR和IR表征。应用UV-Vis和荧光光谱初步探讨了5的光学性质。     

一种新型长共轭结构咔唑衍生物的合成及其光学性质

以咔唑、N,N-二甲基甲酰氨、溴丁烷和对甲基苯乙烯为原料,经Wittig反应和Heck反应合成了一种新型的长共轭结构的咔唑衍生物——3-[(对甲基苯乙烯基)苯乙烯基]-N-丁基咔唑(4),其结构经1H NMR,IR和元素分析表征。用UV-Vis和荧光光谱初步探讨了4的光学性质,结果表明,4具有良好的光学性质。     

两种吩噻嗪衍生物的合成，光学性质及其电化学性质

The synthesis, luminescence and electrochemical properties of two novel phenothiazine derivatives were presented, which exhibit good one-photon fluorescence emission. The quantum yields and solvent effects of them were studied in detail. Compound 3,7-bis（2-4＇-imidazolylbenzylidenehydrazonoethyl）-（0-ethylphenothiazine） （5） was used as an effective initiator, of which two-photon fluorescence spectra were investigated under 800 nm fs laser pulse and the measured two-photon absorption cross-section was 18 × 10^-50 cm^4·s per photon. Two-photon initiated polymerization microfabrication experiments were carried out. X-ray diffraction analyses revealed that the shape of the compound 3,7-bis（2-pyrid-4＇-ylmethylidenehydrazonoethyl）-（0-ethylphenothiazine） （4） looks like a butterfly with nearly planar wings. The dihedral angle of the two benzene rings is 37.6° and there is an obvious π-π stacking interaction between the molecules in the crystal.     

3-[4-(咪唑)苯乙烯基]-9-丁基咔唑的合成及其光学性质

设计并合成了一种含π共轭结构的有机荧光化合物--3-[4-(咪唑)苯乙烯基]-9-丁基咔唑。通过¹HNMR、 ¹³CNMR和IR表征了化合物的结构。采用UV-Vis、荧光光谱和理论计算分析了化合物的光学性质。结果表明：化合物在二氯甲烷(DCM)、乙酸乙酯(EA)、四氢呋喃(THF)、乙醇(EtOH)、乙腈(ACN)、 N,N-二甲基甲酰胺(DMF)和二甲基亚砜(DMSO)中均存在两个吸收峰,其中吸收峰一位于300nm附近,吸收峰二位于335nm附近;在上述溶剂中,λ_em依次为431 nm、 423 nm、 425 nm、 429 nm、 432 nm、 434 nm和439 nm。计算结果显示：第一激发过程属于π→π^*跃迁。     

3-[4-(咪唑)苯乙烯基]-9-乙基咔唑的合成及其性质研究

通过固相Wittig反应合成了一种新型含π电子共轭体系的咔唑衍生物——3-[4-(咪唑)苯乙烯基]-9-乙基咔唑(4),其结构经1HNMR,IR,MS,元素分析和X-射线单晶衍射表征。结果表明,4具有较高的热稳定性及优良的光学性质。     

双枝[1,3,4]-噁二唑衍生物的合成与荧光性质

通过Wittig反应和Heck反应合成了三个双枝噁二唑衍生物: N-{{{3,5-二-[5-(4-叔丁基苯基)-1,3,4-噁二唑-2]-苯基}-E-乙烯基}-4-苯基}二苯胺(BBOD-2), N,N-双{{{3,5-二-[5-(4-叔丁基苯基)-1,3,4-噁二唑-2]-苯基}-E-乙烯基}-4-苯基}苯胺(BBOD-3), N,N,N-三{4-{2-{3,5-二-[5-(4-叔丁基苯基)-1,3,4-噁二唑-2]-苯基}-E-乙烯基}苯基}胺(BBOD-4). 化合物结构经过红外光谱、核磁共振谱、质谱和熔点确证, 测定了它们在不同溶剂中的紫外光谱和单光子荧光光谱. BBOD-1, BBOD-2, BBOD-3, BBOD-4在二氯甲烷中的最大吸收峰分别位于295, 390, 398和408 nm; 最大发射峰分别为360, 486, 483和487 nm. 讨论了Stokes位移与溶剂极性的关系.     

含吩噻嗪金属配合物的合成及非线性光学性质研究

本文报道了一种新的配体:10-乙基-3-甲酰吩噻嗪缩肼基二硫代甲酸甲酯(HL)及其金属配合物的合成。采用了元素分析、质谱、核磁共振、红外光谱对配体及其金属配合物进行了表征。此外,并应用紫外、荧光和Z-扫描技术,测定了配体及其金属配合物的荧光最佳发射波长(λ_max^em)、荧光量子产率(Φ_f)、寿命(τ)和非线性光学性质。结果表明它们在DMF溶液中都能发射出较强的橄榄色荧光,配体及其金属配合物都有双光子吸收,并且金属配合物的非线性光学效应比配体明显增强。用半经验量子化学方法(RHF/PM3)计算结果与实验值较为吻合。     

新型苯并噁唑基吡啶盐的合成及其线性光学性质

以邻氨基苯酚和对甲基苯甲酸为原料,多聚磷酸为溶剂,N₂保护下于220 ℃反应制得中间体L1; L1溴代得中间体L2; L2与三苯基膦反应得膦盐L3,L3与吡啶-3-甲醛通过Wittig反应制得中间体L4,再通过甲基化反应和阴离子置换合成了未见报导的化合物1~6,并利用¹H NMR, ¹³C NMR, FT-IR和HR-MS对化合物1~6的结构进行了表征。单晶结构测试表明:化合物1(CCDC: 1838541)的阳离子部分的平面性较好。紫外可见吸收光谱和荧光发射光谱结果表明：化合物1~6在不同极性溶剂中均具有良好的光学性质。     

通过Heck反应合成3-(2-羧基乙基)-1H-吡咯[2,3-b]吡啶-2-甲酸

以1H-吡咯[2,3-b]吡啶-2-甲酸乙酯为起始原料,经5步反应合成了新化合物3-(2-羧基乙基)-1H-吡咯[2,3-b]吡啶-2-甲酸,其结构经1H NMR和HR-MS表征。合成中间(E)-1-Ts-3-(3-乙氧基-3-氧代丙基-1-烯基)-1H-吡咯[2,3-b]吡啶-2-羧酸乙酯的最佳反应(Heck)条件为:无水DMF为溶剂,Pd(OAc)2为催化剂,dppf为配体,三乙胺为碱,收率88%。     

新型吡唑基咔唑衍生物的合成及其光学性质

以咔唑为原料,合成了一种新型的咔唑衍生物--9-丁基-3,6-二[3'-(5'-三氟甲基)吡唑基]咔唑(4),其结构经1H NMR,IR和MS表征.运用UV和单光子荧光光谱研究了中间体和4的光学性质,结果表明:4有望成为具有应用价值的发光材料.     

3,6-二(蒽醌-2-乙烯基)-N-乙基咔唑的合成及光谱性质研究

利用N-乙基咔唑和2-甲基蒽醌合成了一种A-π-D-π-A分子内电荷转移型化合物3,6-二(蒽醌-2-乙烯基)-N-乙基咔唑,并对该化合物的光化学和光物理行为进行了研究。荧光光谱表明,该化合物的发光行为对溶剂的极性非常敏感,随着溶剂极性的增大,其荧光最大发射峰有明显红移,并在强极性溶剂乙腈中出现了双荧光现象。该化合物的激发态和基态的偶极矩差值△μ为3.014D,发生了从给体(咔唑基)的N原子到分子两端受体(蒽醌)的羰基的分子内电荷转移。     

9-戊基咔唑-3,6-双-(炔苯基-4-甲酸乙酯)的合成与双光子特性研究

采用钯催化的碳碳偶合反应合成了9-戊基咔唑-3,6-双-(炔苯基-4-甲酸乙酯)(I).进一步研究了化合物I在四氢呋喃和40%四氢呋喃水溶液中的光物理性质,结果显示,化合物I在40%四氢呋喃水溶液中的紫外吸收峰位置与其四氢呋喃溶液相比没有发生明显移动,它在40%四氢呋喃水溶液中的单光子荧光发射峰出现在453 nm,较其在四氢呋喃溶液的发射有42 nm红移,其荧光量子效率为0.44.用波长为660 nm飞秒激光激发时,化合物I在40%四氢呋喃水溶液中的双光子荧光发射最大峰红移至489 nm,其双光子吸收截面值为251GM,比其在四氢呋喃溶液中的截面(151 GM)增强了60%.     

新型4,4′-二对吡唑苯乙烯基-2,2′-联吡啶的合成及其光学性质

以吡唑苯甲醛和4-甲基吡啶为原料,经缩合反应合成了一种新型的联吡啶衍生物-一4,4′-二对吡唑苯乙烯基_2,2′-联吡啶(1),其结构经<'1>H NMR,IR和MS表征.用UV和单光子荧光光谱研究了1的线性光学性质.     

Nearly pure blue photoluminescent poly(2,7-[9-)3,5-bis[3,5- bis(benzyloxy)benzyloxy]benzyl)-9-(3,6-dioxaoctyl)]fluorene) in film

The first unsymmetrically substituted polyfluorene bearing a bulky poly(benzyl ether) dendron and less bulky 3,6-dioxaoctyl groups in the 9-position was designed and synthesized, which gives almost a pure bluish photoluminescence with negligible weak greenish excimer emission around 520 nm even in a thermally annealed thin solid film.     

Synthesis and Structure of bis(μ-2-aminopyridine N-oxide)-bis[dichlorocopper(II)]

1 INTRODUCTIONMany complexes of 2-aminopyridine N-oxide (apo) have been characterized by infrared spectra, X-ray powder diffraction spectra, and by magnetic measurements and electronic spectra at liquid nitrogen temperature, but very few of them are their crystal X-ray studies[1~3]. Recently, a number of bridged binuclear copper (II) complexes have been reported, some of which have important potential applications in bioinorganic chemistry and materials[4~6]. Particularly, the complexes …     

Crystal structure of complexes of pentavalent neptunium with 1,8-bis[2-(diphenylphosphinylmethyl)]phenoxy-3,6-dioxaoctane (L) and hexavalent actinides (U,Np, Pu) with 1,8-bis[2-(diphenylphosphinyl)]phenoxy-3,6-dioxaoctane (L<Superscript>1</Superscript>)

Complexes of pentaand hexavalent actinides with phosphoryl-containing podands incorporating a triethylene glycol fragment and 2-(diphenylphosphinyl)phenyl (L¹) or 2-(diphenylphosphinylmethyl)phenyl (L) end groups were synthesized and structurally characterized. The complexes can be described by the following formulas: [NpO₂L(C₂H₅OH)(NO₃)] (I) for pentavalent neptunium and [AnO₂(L¹)₂](OH)₂ · nH₂O (II), where An is U (IIa), Np (IIb), and Pu (IIc), for the isostructural compounds of hexavalent actinides. In I, L is a bidentate bridging ligand. The Np⁵⁺ coordination polyhedron is a pentagonal bipyramid. The bipyramid equatorial plane is formed by the oxygen atoms of two podands L, the bidentate nitrate ion, and the ethanol OH group. The oxygen atoms of the phosphoryl groups of the podand are involved in the coordination environment of two NpO₂⁺ cations where they connect the electrically neutral neptunoyl nitrate fragments to infinite chains along the [100] direction, which are in turn connected into ribbons by strong hydrogen bonds. The crystal of II consists of the complex cations [AnO₂(L¹)₂]²⁺, hydroxyl ions, and water molecules of crystallization. The environment of AnO₂²⁺ is formed by four ligands L¹ whose oxygen atoms form a tetragonal-bipyramidal coordination environment. Each of the two crystallographically independent ligands L¹ is connected to two AnO₂⁺ cations. This gives positively charged layers of actinyl cations perpendicular to the [010] direction connected by molecular ligands. The layers contain channels accommodating hydroxyl ions and crystallization water molecules.     

Synthesis of 2,5-bis(2-aminothiazol-5-yl)-3,6-dichloro-1,4-benzoquinones

A series of 2-(2-aminothiazol-5-yl)-3,6-dichloro-5-diethylaminoethenyl-1,4-benzoquinones was synthesized from 2-(2-aminothiazol-5-yl)-3,5,6-trichloro-1,4-benzoquinones using acetaldehyde and diethylamine in toluene solution. Refluxing these compounds with substituted thioureas in acetonitrile in the presence of hydrochloric acid gives the corresponding 2,5-bis(2-aminothiazol-5-yl)-3,6-dichlorohydroquinones which can be oxidized to the target products with ferric chloride in aqueous DMF.Riga Technical University, Riga LV-1048, LatviaTranslated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 835–839, June, 2000     

反-1,2-双[2-(5-取代苯基恶唑基)]环丙烷的合成与光性能的研究

本文合成了8个反-1,2-双[2-(5-取代苯基恶唑基)]环丙烷和2个1,2-双[2-(5-取代苯基恶唑基)]乙烷,其中9个为新化合物。讨论了化合物的结构与其电子光谱及荧光量子产率间的关系。我们发现恶唑环与三元环间存在一定程度的共轭,并解释了上述化合物荧光量子产率较低的现象。