The aggregation induced fluorescence effect enhanced by a reasonable length of carbon chain
作者:Hanjun Zhang、Furong Tao、Yuezhi Cui、Zhen Xu
DOI:10.1016/j.molliq.2020.112550
日期:2020.3
Six different barbituric acidderivatives using ethyl, propyl, butyl, pentyl, hexyl and heptyl groups as hydrophobic substituents were prepared. Molecular dynamics simulation was carried out to study the effect of different carbon chain lengths on the aggregation-induced emission process. Among the compounds, the CB-5 containing a hexyl substituent exhibited the strongest Aggregation induced emission
使用乙基,丙基,丁基,戊基,己基和庚基作为疏水取代基制备了六种不同的巴比妥酸衍生物。进行了分子动力学模拟,以研究不同碳链长度对聚集诱导的排放过程的影响。在这些化合物中,含有己基取代基的CB-5表现出最强的聚集诱导发射(AIE)效应,而不是具有最长碳链的CB-6。CB-5的聚集体用于检测水性介质中的2,4,6-三硝基甲苯(TNT),其最大猝灭常数为3.1×10 5 M -1。基于CB-5的纸张传感器在蒸汽和溶液中均表现出对TNT的出色灵敏度。这为设计利用长链烷基链的疏水相互作用增强AIE效果的化合物提供了明确的策略。
Ultrasound assisted green synthesis of bound type bis-heterocyclic carbazolyl imidazo[1,2-a]pyridines via Groebke-Blackburn-Bienayme reaction
作者:Mahanandaiah Kurva、Shrikant G. Pharande、Andrea Quezada-Soto、Rocío Gámez-Montaño
DOI:10.1016/j.tetlet.2018.03.031
日期:2018.4
A series of seventeen novel 3-imidazo[1,2-a]pyridine carbazoles bound type bis-heterocycles were synthesized by Ultrasound irradiation (USI) assisted Groebke-Blackburn-Bienaymé reaction (GBBR), by employing ammonium chloride (10 mol%) as a catalyst in excellent yields (90–96%). This new, efficient and mild protocol has silent features such as green inexpensive and easily available catalyst and solvent
通过超声辐照(USI)辅助的Groebke-Blackburn-Bienaymé反应(GBBR),采用氯化铵(10 mol%),合成了一系列十七种新型的3-咪唑并[1,2- a ]吡啶咔唑键合型双-杂环作为催化剂,收率极高(90-96%)。这种新的,高效且温和的方案具有静音功能,例如绿色廉价且在室温下易于获得的催化剂和溶剂。
A new carbazole-based colorimetric and fluorescent sensor with aggregation induced emission for detection of cyanide anion
作者:Qiqi Zou、Furong Tao、Hongtao Wu、William W. Yu、Tianduo Li、Yuezhi Cui
DOI:10.1016/j.dyepig.2019.01.023
日期:2019.5
A new carbazole-based naked-eye colorimetric and fluorescentsensor CPPB with aggregation induced emission (AIE) effect was successfully synthesized. The solid powder of CPPB emitted intense yellow fluorescence, and its emission wavelength and fluorescence intensity in DMSO/H2O solution varied with the percentage of water (fw). Nano-aggregates of CPPB molecules were prepared by increasing fw of DMSO/H2O
一种具有聚集诱导发射(AIE)效应的基于咔唑的新型肉眼比色和荧光传感器CPPB被成功合成。CPPB的固体粉末发出强烈的黄色荧光,其在DMSO / H 2 O溶液中的发射波长和荧光强度随水的百分比(f w)而变化。通过增加DMSO / H 2 O溶液的f w来制备CPPB分子的纳米聚集体,并在99%DMSO水溶液中以最大荧光强度达到CPPB的最佳聚集状态。而且,CPPB显示高选择性和灵敏度朝向氰化物阴离子(CN -即使是在其他竞争阴离子(CN的存在下,在99%DMSO水溶液)-,F - ,氯-,ACO -,NO 3 - ,我-,CO 3 2-,HCO 3 -,HSO 3 -,SO 4 2-,S 2-,HS -,OH -,H 2 PO 4 -和HPO 4 2-)和反应性氧物种(H 2 ö2,O 2 ·-,1 O 2,t-BuOOH和·OH)。为CN的感测机构-通过光学光谱研究,证实了1个1 H