4-(N-咔唑基)查尔酮的合成及其光学性质

4-N-咔唑基苯甲醛和苯乙酮经aldol反应合成了一种新型含咔唑基查尔酮——4-(N-咔唑基)查尔酮(2),其结构经1H NMR,IR,MS和元素分析表征。运用UV-Vis和单光子荧光光谱研究了2的光学性质。结果表明:2的λmax位于360 nm和320 nm附近;2在CH2Cl2和DMF中具有良好的荧光发射能力,λem位于520 nm。     

1-溴-4-(2,2-二苯乙烯基)苯的合成及其荧光性能

以对溴苄基溴和亚磷酸三甲酯为原料,经亲核取代反应制得(4-溴苄基)磷酸二甲酯(2);2与二苯甲酮经Wittig-Horner反应合成了新化合物——1-溴-4-(2,2-二苯乙烯基)苯(1),其结构经1H NMR,13C NMR,IR,EI-MS和XRD表征。1(CCDC:1 056 026)的晶体结构研究发现,立体构型的1有利于抑制分子间的紧密堆积。荧光性能研究表明:在307 nm激发波长激发下,1在甲苯溶液中的λem位于350 nm,荧光强度约7 377;在固态时,在372 nm激发波长激发下,1的λem位于442,荧光强度为3.0×105。1的固态荧光强度为液态荧光强度的40.7倍,表明1具有AIE特性。     

N,N-二(4'-对苯基-2,2'∶6',2″-三联吡啶)-4,13-二氮杂-18-冠-6醚的合成及其光学性能

以Pd(OAc)2/PBut3为催化剂,4'-(对溴苯基)-2,2'∶6',2″-三联吡啶与二氮杂-18-冠-6经取代反应合成了新化合物N,N-二(4'-对苯基-2,2'∶6',2″-三联吡啶)-4,13-二氮杂-18-冠-6-醚(4),收率58.8%,其结构经1H NMR,13C NMR和FT-IR表征。利用紫外光谱和荧光发射光谱研究了4的光学性能,结果表明:4在甲醇中的最大紫外吸收位于358 nm;在350 nm激发波长激发下,4在二氯甲烷中的最大荧光发射峰位于458 nm。     

4,5-二苯基-2-(9-苯基-9H-3-咔唑基)-1H-咪唑的合成及其性能

以联苯甲酰、对溴苯甲醛和乙酸铵为原料，经缩合反应制得2-(4-溴苯基)-4,5-二苯基咪唑(1); 1与N-苯基-3-咔唑硼酸经Suzuki偶联反应合成了一种具有D-π-A结构的新型咪唑衍生物4,5-苯基-2-(9-苯基-9H-3-咔唑基)-1H-咪唑(2），其结构经¹H NMR, ¹³C NMR, IR和MS(EI)表征。采用FL, UV-Vis，循环伏安法（CV）和理论计算对2的光电性能进行了研究。结果表明：2的最大吸收波长为302 nm和326 nm，荧光发射波长为395 nm和412 nm, HOMO和LUMO轨道能级分别为5.35 eV和2.14 eV。     

(E)-2-(2-(1-(4-氯苯基)-3,5-二甲基-吡唑-4-基)乙烯基)-8-羟基喹啉的合成及光学性质

利用缩合反应合成了(E)-2-(2-(1-(4-氯苯基)-3,5-二甲基-吡唑-4-基)乙烯基)-8-羟基喹啉,利用质谱仪、核磁共振谱仪及红外光谱仪表征了其结构;并测定了其紫外光谱和荧光光谱.结果表明,所合成的8-羟基喹啉化合物在253.5 nm、303 nm和338.5 nm处出现紫外吸收峰;当激发光波长为225 n...     

N-(安替比林-4-基)-香豆素-3-甲酰胺的合成及其光学性能

以香豆素-3-甲酰氯和4-氨基安替比林为原料,采用传统加热或无溶剂室温研磨法合成了一种新型的含安替比林基香豆素-酰胺类化合物——N-(安替比林-4-基)-香豆素-3-甲酰胺(3),其结构经1H NMR和FT-IR表征。用UV-Vis和荧光光谱研究了3的光学性能。结果表明:3的λmax位于290 nm,334 nm;在THF中,3的λem位于319 nm(λex=283 nm);固体荧光的最大发射波长位于471 nm(λex=295 nm)。     

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。      

MEH-PPV型单体[2,5-双(4′-溴-2′,5′-二甲氧基苯基乙烯基)-1-甲氧基-4-(2′-乙基己基氧基)苯]的合成及其发光性能

以对苯二甲醚为原料,经甲酰化和溴代反应合成2,5-二甲氧基-4-溴苯甲醛(2)。以对甲氧基苯酚为原料,经烷基化、氯甲基化和Michaelis-Arbuzov反应合成亚膦酸酯(5);2和5经Horner-Wittig-Emmons反应合成了2,5-双(4′-溴-2′,5′-二甲氧基苯基乙烯基)-1-甲氧基-4-(2′-乙基己基氧基)苯(6),总收率44.7%,其结构经1HNMR,13C NMR和元素分析表征。UV-Vis和荧光光谱(FL)研究表明,6的UV-Vis和FL的λmax分别位于410 nm和479 nm,497 nm,是一种绿光的MEH-PPV型单体。     

2-(4-咔唑-1-基-苯基)-1H-苯并咪唑的合成及其光学性质

以邻苯二胺与4-(咔唑-1-基)苯甲醛为原料,合成了一种新型苯并咪唑衍生物--2-(4-咔唑-1-基-苯基)-1H-苯并咪唑(2),其结构经¹H NMR, ¹³C NMR, MS（ESI), IR和元素分析表征。通过理论计算,结合UV-Vis和单光子荧光光谱研究了其光学性质,结果表明：2在二氯甲烷,乙酸乙酯,乙醇,乙腈和DMF中的λ_max均位于292 nm和330 nm 附近, λ_em分别为389 nm, 379 nm, 395 nm, 400 nm和390 nm。     

1-(4-吡啶基)苯基-3,5-二[4-(9’H-9’-咔唑基)苯基]苯的合成及其光学性能

以咔唑、对二溴苯、4-溴苯胺和1,3,5-三溴苯为原料,经重氮化、Ullmann反应、硼酸化和Suzuki等反应合成了一种新型的荧光配体———1-(4-吡啶基)苯基-3,5-二[4-(9’H-9’-咔唑基)苯基]苯(6),其结构经1H NMR,MS和元素分析表征。研究了6在二氯甲烷中的紫外吸收光谱和荧光光谱。结果表明,6在237 nm,293 nm和345 nm处有较强吸收;6的最大发射波长在413 nm。     

Synthesis of D-Glucos-2-yl Sucros-2-yl Phosphate (Agrocinopin C) and bis(D-glucos-2-yl) Phosphate (Agrocinopin D)

Abstract

The synthesis of a substance with the revised structure proposed for agrocinopin C, D-glucos-2-yl sucros-2-yl phosphate, via the hydrogen-phosphonate approach to phosphodiesters is presented. Agrocinopin D, related to agrocinopin C by the lack of the fructofuranosyl part of the sucrose moiety, is synthesized via direct formation of hydrogen-phosphonate diesters from appropriately protected monosaccharides and phosphonic acid.     

N-甲基-2-{N-乙基-6-[2-(8-甲氧基喹啉基)乙烯基]咔唑基}富勒烯 吡咯烷的合成、电化学性质与双光子吸收特性

设计合成了N-甲基-2-{N-乙基-6-[2-(8-甲氧基喹啉基)乙烯基]咔唑基}富勒烯吡咯烷(6). 产物通过FT-IR, UV, 1H NMR, 13C NMR, MS等对其结构进行表征; 用循环伏安法测定了化合物6的电化学性质. 结果表明, 与参比化合物C60相比还原电位发生负移; 通过Z-扫描方法研究了化合物6的双光子吸收特性, 测得双光子吸收截面积可达62.58 GM. 运用Gaussian 03 量子化学程序包, 采用B3LYP密度泛函(DFT)的方法, 在3-21G(d)水平上对分子的几何构型进行了优化, 预测了化合物6的电化学性质, 与实验结果基本一致.     

1-(Fluoren-2-yl)-2-(2-azafluoren-3-yl)ethene and 1-(fluoren-2-yl)-2-(2H,2-methylindeno[2,3-c]pyridine)ethene

Condensation of 3-methyl-2-azafluorene with 2-formylfluorene results in the formation of a compound containing a polyconjugated system and two acidic CH centers, namely, 1-(fluoren-2-yl)-2-(2-azafluoren-3-yl)ethene. The conversions of this compound upon treatment with alkali have been studied by electronic absorption spectroscopy. The methyl iodide derivative of this base was used as an intermediate in the preparation of a pseudo-azulene, 1-(fluoren-2-yl)-2-(2H, 2-methylindeno[2,3-c]pyridine)ethene.Translated from Khimiya Geterotsiklicheskikh Soedinenii No. 5, pp. 657–659, May, 1987.     

Synthesis and mesomorphic properties of 2-(4′-alkoxybiphenyl-4-yl)-1H-benzimidazole derivatives

Three series of 2-(4′-alkoxybiphenyl-4-yl)-1H-benzimidazole derivatives (nM-x), which possessed 5-nitrobenzimidazole (nM-N series), benzimidazole (nM-H series) or 5-methylbenzimidazole (nM-M series) units at the end of the molecule, were synthesised and characterised by infrared, ¹H- and ¹³C-nuclear magnetic resonance spectra, electrospray ionisation-mass spectrometry and elemental analysis. Their phase transition behaviour was investigated by differential scanning calorimetry, polarising optical microscopy and X-ray diffraction. All the compounds exhibited enantiotropic smectic mesophases with wide temperature domains for a carbon number in the alkoxy chain from 6 to 16, where the mesophase ranges were 14–91°C and 17–99°C during heating and cooling processes for the nM-N compounds, 7–25°C and 8–49°C for the nM-H compounds and 48–81°C and 52–85°C for the nM-M compounds, respectively. The effect of the length of alkoxy chain on mesomorphic properties was discussed. The nM-N and nM-M exhibited a much wider mesophase range whether during heating or cooling process than the corresponding nM-H series, especially for the longer terminal chain (n > 8), which indicated that the substituent in the benzimidazole moiety was helpful in increasing the mesophase stability.     

Synthesis of Functionalized Diethyl(pyrrolidin-2-yl)phosphonate and Diethyl(5-oxopyrrolidin-2-yl)phosphonate

Short and efficient syntheses of functionalized (pyrrolidin-2-yl)phosphonate and (5-oxopyrrolidin-2-yl)phosphonate have been developed. The synthetic strategy involved the diastereospecific 1,3-dipolar cycloaddition of N-benzyl-C-(diethoxyphosphoryl)nitrone to cis-1,4-dihydroxybut-2-ene and dimethyl maleate, respectively. O,O-Diethyl 3-carbamoyl-4-hydroxy(5-oxopyrrolidin-2-yl)phosphonate was obtained from O,O-diethyl 2-benzyl-4,5-dimethoxycarbonyl(isoxazolidin-3-yl)phosphonate by hydrogenation and subsequent treatment with ammonia, whereas transformation of O,O-diethyl 2-benzyl-4,5-dihydroxymethyl(isoxazolidin-3-yl)phosphonate into O,O-diethyl 3-aminomethyl-4-hydroxy(pyrrolidin-2-yl)phosphonate was accomplished by mesylation followed by hydrogenolysis to undergo intramolecular cyclization and the introduction of amino group via ammonolysis. Stereochemistry of the isoxazolidine cycloadducts, as well as the final functionalized (pyrrolidin-2-yl)- and (5-oxopyrrolidin-2-yl)phosphonates were established based on conformational analyses using vicinal H–H, H–P, and C–P couplings and supported by the observed diagnostic NOESY correlation signals.     

Crystal Structure and Theoretical Energy Gap of 2-(2-((4-(Pyridin-2-yl)pyrimidin-2-yl)disulfanyl)pyrimidin-4-yl) pyridinium Hexafluorophosphate

The crystal structure of 2-(2-((4-(pyridin-2-yl)pyrimidin-2-yl)disulfanyl)pyrimidin-4-yl)pyridinium hexafluorophosphate was obtained by X-ray single-crystal diffraction. This molecule crystallizes in monoclinic P2/c space group with a=6.219(1), b=13.103(2), c=13.059(2) ?, β=97.567(2)°, Z=2, the final R=0.0525 and w R=0.1434. The title compound was prepared successfully from 1,2-bis(4-(pyridin-3-yl)pyrimidin-2-yl)disulfane(BPPD). TD-DFT computational studies on energy gaps and UV-Vis spectra of BPPD and the title compound have been carried out for comparisons. The resultant HOMO-LUMO gap of the BPPD compound is 4.45 e V, while that for the corresponding hexafluorophosphate salt is much smaller at 2.46 e V, which are in agreement with their UV-Vis absorptions.     

基于3-吡唑-5吡啶-1,2,4-三唑和均苯四甲酸构筑的两个同构配位聚合物的晶体结构和磁性

以3-吡唑-5吡啶-1,2,4-三唑(H2L)和均苯四甲酸(H_4btec)为配体合成了2个新的同构配位聚合物[M(btec)_(0.5)(H_2L)]_n(M=Co(Ⅱ)(1),Cu(Ⅱ)(2)),通过X射线单晶衍射、元素分析、红外光谱等进行了结构表征。晶体结构分析表明配合物1和2是同构的,都属于正交晶系,空间群为Pbca。2个配位聚合物都是二维结构,通过N…H…O氢键形成三维超分子框架结构。此外对上述配合物进行了磁性研究,结果表明配合物1内通过羧基桥连的金属钴离子之间是弱的铁磁相互作用;配合物2中存在典型的順磁行为。