Poly(benzodithieno-imidazole-alt-carbazole) based π-conjugated copolymers: Highly selective and sensitive turn-off fluorescent probes for Hg2+
作者:Dipanjan Giri、Arindam Bankura、Sanjib K. Patra
DOI:10.1016/j.polymer.2018.10.069
日期:2018.12
common organic solvents, heptyl (in P1) or 2-(2-(2-methoxyethoxy)ethoxy)ethyl (in P2) substituents have been introduced at benzodithieno-imidazole and 9-position of carbazole unit. The well-defined and soluble π-conjugated polymers have been characterized by multinuclear NMRspectra as well as by tetradetector GPC studies showing molecular weight (Mn) of 16.5 and 14.3 kDa with the polydispersity indices
1,2,3-Triazolyl functionalized thiophene, carbazole and fluorene based A-<i>alt</i>-B type π-conjugated copolymers for the sensitive and selective detection of aqueous and vapor phase nitroaromatics (NACs)
作者:Dipanjan Giri、Sanjib K. Patra
DOI:10.1039/d0tc03310c
日期:——
with a polydispersity index in the range of 1.25–1.42. The synthesized emissive π-conjugated polymer probes were explored as fluorescent chemosensors for nitroaromatic compounds (NACs) in solution, vapor and contact mode. Detailed photophysical and sensing studies were performed to understand the polymer–NAC interaction, inducing the selective fluorescence quenching of the π-conjugated polymer probes
通过Suzuki聚合反应,合成了一系列高发射率的π-共轭A- alt -B型共聚物(P1-P3),并附加了1,2,3-三唑部分。通过多核NMR光谱和四检测器GPC研究对定义明确且可溶的π共轭共聚物进行了表征,表明分子量(M n)在16.4–20.1 kDa范围内,多分散指数在1.25–1.42范围内。合成的发射π-共轭聚合物探针被用作荧光化学传感器,用于溶液,蒸汽和接触模式下的硝基芳香族化合物(NAC)。进行了详细的光物理和传感研究,以了解聚合物与NAC的相互作用,并通过光致电子转移(PET)机理诱导π共轭聚合物探针的选择性荧光猝灭。所有聚合探针(P1-P3)本质上都可以与NAC高度逆转,因此可以多次重复使用。发现对硝基芳香族化合物的探针检出限在120–200 ppb范围内,具有高缔合常数,约为10 4 M -1。此外,还制作了试纸套件,可以用肉眼对苦味酸进行痕量检测,使其成为一种快速,简
A cucurbituril/polysaccharide/carbazole ternary supramolecular assembly for targeted cell imaging
作者:Xuan Wu、Yong Chen、Qilin Yu、Feng-Qing Li、Yu Liu
DOI:10.1039/c9cc01601e
日期:——
A ternary supramolecular assembly with near-infrared lysosome imaging and targeted photodynamic therapy properties was successfully orthogonally constructed in a two-step assembly manner.