Shedding light on the photostability of two intermolecular charge-transfer complexes between highly fluorescent bis-1,8-naphthalimide dyes and some π-acceptors: A spectroscopic study in solution and solid states
作者:Moamen S. Refat、Lamia A. Ismail、Abdel Majid A. Adam
DOI:10.1016/j.saa.2014.06.107
日期:2015.1
8-naphthalimides in the trends of biology, medicine and industry, the current study focused on extending the scope of these dyes by introducing some of their charge-transfer (CT) complexes. For this purpose, two highly fluorescent bis-1,8-naphthalimide dyes and their complexes with some π-acceptors have been synthesized and characterized spectroscopically. The π-acceptors include picric acid (PA), chloranilic acid
鉴于1,8-萘二甲酰亚胺在生物学,医学和工业发展趋势中的各种重要性,当前的研究重点是通过引入一些电荷转移(CT)复合物来扩展这些染料的范围。为此目的,已经合成了两种高荧光的bis-1,8-萘二甲酰亚胺染料及其与某些π-受体的配合物,并进行了光谱表征。π受体包括苦味酸(PA),氯苯甲酸(CLA),四氰基喹二甲烷(TCNQ)和二氯二氰基苯并醌(DDQ)。分子结构,光谱和荧光性质以及结合模式由红外,紫外可见和11 H NMR光谱研究。根据元素分析和光度滴定法确定络合结合率为1:1。已经发现,对于不同受体的接受能力的顺序是TCNQ> DDQ> CLA> PA。1,8-萘二甲酰亚胺染料作为供体的光稳定性及其掺杂在聚甲基丙烯酸甲酯/ PMMA中的电荷转移复合物暴露于UV-Vis辐射,并且在照射期间的不同时间实现了吸收光谱的变化。
7-Aminooumarin and 1,8-naphthalimide homodimers have been developed to demonstrate the validity of our modular probe design on the basis of a triamine-based spacer.
diethylenetriamine, and the resultant receptor showed interesting potential for metal recognition. The chemosensor activity of the naphthalimide-based receptor was evaluated following the synthesis of the organic nanoparticles (ONPs) using a reprecipitation method. The organic nanoparticles were evaluated for their photophysical properties, mainly using fluorescence spectroscopy in aqueousmedia, and the studies revealed
Preparation of some compounds and study their thermal stability for use in dye sensitized solar cells
作者:Abdulraheem S.A. Almalki、A. Alhadhrami、Rami J. Obaid、Meshari A. Alsharif、Abdel Majid A. Adam、Ivo Grabchev、Moamen S. Refat
DOI:10.1016/j.molliq.2018.04.057
日期:2018.7
the synthesized CT complexes were stoichiometrically, spectroscopically and thermally characterized. The results obtained from CHN elemental analyses and spectrophotometric titrations indicated the formation of CT complexes with a molar ratio of 1:1 between the PA and each dye. The spectroscopic and physical parameters (KCT, εmax, ECT, f, μ, RN, IP, and ΔG°), the band gap energy (Eg), and the kinetic–thermodynamic