1,8-萘酰亚胺衍生物复合纤维素水凝胶的制备及荧光性质研究

合成制备了四种1,8-萘酰亚胺类衍生物,制备纤维素荧光水凝胶。采用核磁共振(NMR)技术对合成的1,8-萘酰亚胺类衍生物进行结构确认。利用荧光发射光谱和激发谱对不同荧光分子浓度纤维素荧光水凝胶的荧光光谱进行分析,根据荧光强度与荧光出峰位置探讨了荧光分子在纤维素水凝胶中的聚集态结构及运动行为。随1,8-萘酰亚胺类衍生物浓度增加,分子凝聚对复合水凝胶的荧光行为影响极大。     

活性荧光染料的研究进展

本文简述了活性荧光染料的发色机理,并分别介绍了萘酰亚胺类、香豆素类、罗丹明类以及其他类活性荧光染料的合成方法。     

一种新型双发色团罗丹明荧光染料的合成与结构表征

基于双发色团荧光染料的优良光学性能,设计以水合肼、二硫化碳及罗丹明B为起始原料,经反应分别得到1,3-二氨基硫脲与罗丹明B酰肼。通过分子间缩合反应以1,3-二氨基硫脲两端的氨基分别连接两分子罗丹明B,合成了一种新型双发色团罗丹明荧光染料。利用~1H NMR、HRMS-ESI对所合成目标物分子结构进行表征,优化反应物配比以提高缩合反应产率,为双发色团荧光染料的合成提供新思路。     

荧光染料N—芳基—4—氨基—1,8—萘二酰亚胺的制备

N-芳基(烷基)-4-氨基-1,8-萘二酰亚胺具有吸收日光或紫外光而发射荧光的性质,通常将它分散于尿醛树脂或三聚氰胺树脂制得日光荧光颜料,广泛使用于印刷油墨及荧光油漆。单用N-2,4-二甲基苯基-4-氨基-1,8-萘二酰亚胺可制备黄色荧光颜料;如果和罗丹明6ZH配合可制备橙色荧光颜料;和酞菁绿配合可制备绿色荧光颜料。若4位氨基进一步重氮化,可制备一系列适用于各种聚酯、聚酰胺、醋酸纤维等合成和人造纤维的偶氮染料。另外还是制备荧光增白剂和酸碱指示剂的中间体。此类化合物的制备,一种方法为由苊出     

水溶性萘酰亚胺氢离子荧光分子探针的合成及性能

4 溴 1,8 萘酐与羟乙氧基乙胺反应合成了中间体N 羟乙氧基乙基 4 溴 1,8 萘酰亚胺。用该中间体分别与哌嗪、甲基哌嗪和羟乙基哌嗪反应 ,合成了 4 哌嗪基、4 (甲基哌嗪 )基和 4 (羟乙基哌嗪 )基 1,8 萘酰亚胺衍生物 (NP - 1、NP - 2和NP - 3)。这 3种化合物具有较好的水溶性 ,其水溶液的荧光强度随溶液由碱性到酸性变化 ,荧光强度增加在 5 0倍以上。NP - 1、NP - 2和NP - 3的pK′a值分别为 8 5、7 6和 6 7。     

水溶性的1,8-萘酰亚胺类荧光单体的合成与表征

以4-溴-1,8-萘酐和正丙胺为原料,经过酰胺化、胺化、季铵化3步反应,得到水溶性的1,8-萘酰亚胺类荧光单体4-(N′-甲基-1-哌嗪基)-N-丙基-1,8-萘二甲酰烯丙基氯化铵。通过红外光谱、质谱及核磁共振谱对其结构进行了表征,并对其荧光光谱进行了初步的研究。     

以共价键相连的卟啉-酞菁化合物分子内能量传递及光诱导电子转移

合成了叶啉与酞菁以共价键连接起来的双发色团分子。测定了它们的吸收光谱,荧光光谱,荧光寿命等。计算了分子内能量传递过程的效率(φ_(EnT))及速率常数(κ_(EnT))。结果表明:在稀溶液中,卟啉与酞菁等克分子混合时,观察不到分子间能量传递过程现象的发生;而双发色团分子的分子内能量传递过程则明显发生了,其效率(φ_(EnT)=13～70％)与速率常数(κ_(EnT)=1.2×10~7～2.0×10~8s~(-1))取决于分子的结构类型。电子转移与能量传递过程与介质性质有关。在极性溶剂中有利于电子转移过程的进行,而不利于能量传递过程;在非极性溶剂中,则有利于能量传递过程的进行,而不利于电子转移。 选择性激发酞菁发色团,观测到了只有电子转移发生的过程,其电子转移效率达到38％。     

萘酰亚胺类高聚物色素研究进展

综述了苯酰亚胺类高聚物色素研究进展,萘酰亚胺结构的特殊性和容易生成多种衍生物,使之成为研究较多的可荧光着色剂单体。烯丙基是这类可聚合色素单体主要的聚合基团．可以在萘酰亚胺分子的不同位置引入,形成多种结构。作为可聚合物单体,萘酰亚胺可以与苯乙烯、丙烯酸酯、丙烯腈等发生共聚反应,得到侧链带有荧光发色团的聚合物,该聚合物可应用于不同高新技术领域。     

可聚合萘酰亚胺类红色荧光色素单体的合成

以4-溴-1,8-萘酐为原料,经亚胺化、Ullman醚缩合和Pschorr闭环等反应,最后与丙烯酰氯经酯化得到强烈的含丙烯酰氧乙基氨基的1,8-萘酰亚胺衍生物,表现出良好的红色荧光聚合色素单体性能.     

树枝形聚合物修饰双8-羟基喹啉衍生物的合成及稳态光物理性质研究

设计合成了1—3代芳醚骨架树枝形聚合物修饰的双8-羟基喹啉衍生物．对这些化合物在不同溶剂中的荧光光谱研究表明，随着代数的增加，目标树枝形聚合物的荧光量子产率增大，树枝形聚合物对核心发色团具有一定的隔离作用，并且目标分子内可以发生从骨架向核心发色团的能量传递．     

新型双发色团固体激光染料薄膜的光稳定性研究

利用UV－Vis吸收光谱仪和光化学反应器研究了新型双发色团固体激光染料薄膜的光降解动力学。研究结果表明：双发色团固体激光染料薄膜 的光褪色反应遵循假一级动力学衰减。在PRNAM系列共聚物（N－烯丙基－若丹明19、N－[2-丙烯酸基）乙基]-1,8-萘酰亚胺和甲基丙烯酸甲酯的共聚物）中萘酰亚胺基团通过聚合物碳链与若丹明基团的氮原子相连；而在PRNM系列共聚物（若丹明19的烯丙基酯、N-[(2-丙烯酸基）乙基]-1,8,-萘酰亚胺和甲基丙烯酸甲酯的共聚物）中则是与若丹明基团的酯基相连。PRNAM系列共聚物的光稳定性优于PRNM和PRM（若丹明19的烯丙基酯和甲基丙烯酸甲酯的共聚物）系列的光稳定性。     

Synthesis, photophysical and photochemical properties of fluorescent poly(amidoamine) dendrimers

The study reports on the synthesis of four novel PAMAM dendrimers of generation 2, modified with 1,8-napthalimide. Their photophysical characteristics have been determined in organic solvents of different polarity (chloroform and N,N-dimethylformamide). The spectral assignments of the dendrimers are dependent on the nature of the substituent at C-4 position of the 1,8-naphthalimide structure. The low quantum yield of fluorescence of the novel materials reveals that a photo-induced electron transfer is proceeding from the core of the dendrimer molecule to the naphthalimide fluorophore located in its periphery. The PAMAM dendrimers thus modified exhibit good photo stability in N,N-dimethylformamide solution.     

A novel donor-acceptor polymeric electrochromic material containing carbazole and 1,8-naphtalimide as subunit

We report here the synthesis of a novel polymeric electrochromic material containing carbazole (Cbz)-donor and 1,8-napthalimide-acceptor as subunit. The band gap E_g was measured using UV-vis spectroscopy and compared with that obtained by cyclic voltammetry (CV). Due to intramolecular electron transfer from Cbz-donor to 1,8-napthalimide-acceptor, the fluorescence quenching was observed. When the spectro-electrochemical and electrochromic properties of polymer film were investigated, various tones of green color were obtained on the polymeric film. In the positive regime, the polymer film obtained thereby is dark green resulting from the association of carbazolylium cation radicals at oxidized state and then it can be bleached by electrochemical reduction. Besides, in the negative regime, yellowish green color of film converted to blue attributed to reduction of the 1,8-napthalimide moiety. Finally, the polymeric electrochromic exhibits multi-electrochromic behavior, high redox stability, high coloration efficiency and reasonable response time.     

Fe^3＋离子荧光探针的研究进展

综述了用于检测铁离子的荧光探针的研究进展,重点介绍了基于罗丹明B、吡啶、1,8-萘酰亚胺合成的铁离子荧光探针的结构和设计原理,概述了这些铁离子荧光探针在检测过程中的优点及其实际应用价值,并展望了这些铁离子荧光探针的研究和发展方向。     

基于多因素的光催化降解动力学模型的研究

以纳米TiO2为光催化剂,罗丹明B为降解对象,在KL-1型紫外光实验装置中研究多种因素对光催化降解的影响并建立动力学模型.模型的主要参数有:罗丹明B初始浓度、TiO2投加量、溶液pH以及已知化合物的物理性质(分子的摩尔体积和溶解度).建立的模型表明,反应速率常数与降解物初始浓度呈现线性关系,而与催化剂投加量的关系和单峰...     

A naphthalimide-rhodamine ratiometric fluorescent probe for Hg based on fluorescence resonance energy transfer

On the basis of fluorescent resonance energy transfer from 1,8-naphthalimide to rhodamine B, a new fluorophore dyads (4) containing rhodamine B and a naphthalimide moiety was synthesized as a ratiometric fluorescent probe for detecting Hg²⁺ with a broad pH range 5.7-11.0. The selective fluorescence response of 4 to Hg²⁺ is due to the Hg²⁺-promoted desulfurization of the thiocarbonyl moiety, leading to the ring-opening of rhodamine B moiety of 4. When 4 was employed at 0.1 μM with the slit size being 20 nm/20 nm, a low level of Hg²⁺ (up to 3 × 10⁻⁸ M) can be detected using the system.     

3,4-二氨基-1,8-萘酐的合成与结构表征

设计合成了3,4-二氨基-1,8-萘酐,以苊作为原料,经过硝化、还原、乙酰化、氧化等七步反应合成的3,4-二氨基-1,8-萘酐,其总收率为11.2%。并用HPLC验证纯度,纯度为98.95%。该化合物作为前体化合物,可继续合成一系列新型萘酰亚胺类抗肿瘤药物。化合物结构均经1H NMR和GC-MS等表征。     

Ratiometric fluorescent chemosensor based on the block copolymer of poly(N-isopropylacrylamide)-b-poly(N-vinylcarbazole) containing rhodamine 6G and 1,8-naphthalimide moieties

We have synthesized an amphiphilic block copolymer poly(N-isopropylacrylamide)-b-poly(N-vinylcarbazole) containing 1,8-naphthalimide and spirolactam rhodamine 6G moieties via reversible addition-fragmentation chain transfer radical polymerization. The photoluminescence (PL) spectrum of the poly(N-vinylcarbazole) block well matches the absorption spectrum of the 1,8-naphthalimide moiety and the enhanced emission with a peak at 510 nm from the 1,8-naphthalimide moiety is found in the block copolymer film for excitation at 330 nm. The 560-nm emission from the rhodamine 6G moiety is observed as the block copolymer film sprayed by Britton-Robinson (B-R) buffers or Fe³⁺ aqueous solutions for excitation at 330 and 400 nm. The PL intensity at 560 nm is markedly increased for the pH value of the B-R buffer lower than 3.0 or the Fe³⁺ concentration in water higher than 5 × 10⁻⁴ M. The 560-nm PL intensity is much higher for the block copolymer film photoexcited at 330 nm than that photoexcited at 400 nm due to double-step resonance energy transfer. The PL intensity ratio of 560 to 510 nm (I₅₆₀/I₅₁₀) is dependent on the resonance energy transfer from 1,8-naphthalimide to rhodamine 6G, which is sensitive to the concentrations of H⁺ and Fe³⁺ ions in water.     

A Symmetrical Diester as the Sex Attractant Pheromone of the North American Click Beetle Parallelostethus attenuatus (Say) (Coleoptera: Elateridae)

Hexanoic acid, 1-octanol, 1,8-octanediol, octyl hexanoate, 1,8-octanediol monohexanoate, and 1,8-octanediol dihexanoate were identified in headspace volatiles collected from the crushed abdomen of a female click beetle of the species Parallelostethus attenuatus (Say) (Elaterinae, tribe Elaterini). In field trials carried out in Illinois, South Carolina, North Carolina, and Virginia, adult male beetles were strongly attracted to 1,8-octanediol dihexanoate alone. Blends of the dihexanoate with one or more of the other compounds proved to be less attractive than the dihexanoate alone, suggesting that the pheromone of this species may consist of a single compound. The symmetrical diester structure of the pheromone is a novel natural product and appears to be structurally unique among insect pheromones.

     

在膜中测量光生酸剂产酸量的标准工作曲线的建立

本文介绍了1种在膜中定量测量光生酸剂产酸量的标准工作曲线的建立方法。选用罗丹明B作为指示剂,通过其紫外吸光度的改变来反映酸度的变化。用紫外分光光度计测量盐酸、三氟甲磺酸在不同浓度时罗丹明B的特征吸收的变化,选取酸浓度与罗丹明的特征吸收的变化量呈线性关系的线段部分作为标准曲线。光生酸剂曝光后罗丹明B的特征吸收变化对应到标准曲线中,通过计算就可以得出光生酸剂曝光产生的酸量。