新型聚苯撑共轭共聚物的合成及特性描述了-芴)主链和通过柔性间隔基团连接到主链的2,6-双(1'-甲基苯并咪唑基)吡啶(bip)配体。该共聚物是通过Pd催化的9,9-二己基芴的2,7-双pinacolatoboron酯与在2和5位带有两个ω-bip-取代的烷氧基的1,4-二溴苯衍生物的Suzuki偶联而制备的。产率为88%。该聚合物易溶于常见的有机溶剂,并显示出强烈的蓝色荧光,其最大波长为416 nm。甲苯的荧光量子产率为85%。用甲苯/甲醇(99:1 v / v)中的氯化锌和甲苯/甲醇(24:1 v / v)中的高氯酸亚铁对聚合物进行UV / vis滴定,表明形成了2:1的配体:金属离子(bis)复合体。复合物的形成伴随着离子特异性颜色的变化(电致变色)和配体荧光的猝灭。主链荧光被部分保留。配位体取代的聚合物(“多位配位体”)和二价金属离子(Zn(II),Cu(II))之间的配位相互作用可
A bifunctionalized [3]rotaxane and its incorporation into a mechanically interlocked polymer
作者:Yi Jiang、Jia-Bin Guo、Chuan-Feng Chen
DOI:10.1039/c0cc00999g
日期:——
A novel bifunctionalized [3]rotaxane based on a triptycene-derived macrotricyclic host was conveniently synthesized. On the basis of the [3]rotaxane, a linear main-chain poly[3]rotaxane was further obtained by the highly efficient Huisgen 1,3-dipolar cycloaddition.
Synthesis of functionalized copillar[4+1]arenes and rotaxane as heteromultivalent scaffolds
作者:Wenzhang Chen、Tharwat Mohy EI Dine、Stéphane P. Vincent
DOI:10.1039/d0cc07684h
日期:——
In this study, novel copillar[4+1]arenes were used as central heteromultivalent scaffolds via orthogonal couplings with a series of biologically relevant molecules such as carbohydrates, α-amino acids, biotin and phenylboronic acid. Further modifications by introducing maleimides or cyclooctyne groups provided molecular probes adapted to copper-free click chemistry. An octa-azidated fluorescent rotaxane
diphenyl- and dimethylglycolurils were synthesized. Sequential treatment of these compounds with imidazole, methyl iodide, and sodium tetrafluoroborate gave their corresponding tetra imidazolium salts. Some of these compounds because of their low melting points can be registered as a potential and new class of ionic liquids.
The water-soluble CP was conjugated with a rhodamine spirolactam for the first time to develop a new FRET-based ratiometric fluorescence sensing platform (CP 1) for intracellular metal-ion probing. CP 1 exhibits excellent water-solubility with two well-resolved emission peaks, which benefit ratiometric intracellular imaging applications.
Quinoline appended pillar[5]arene (QPA) as Fe3+ sensor and complex of Fe3+ (FeQPA) as a selective sensor for F−, arginine and lysine in the aqueous medium
作者:Roymon Joseph、Adersh Asok、Kuruvilla Joseph
DOI:10.1016/j.saa.2019.117390
日期:2020.1
A quinoline functionalized pillar[5]arene, QPA has been prepared and its interaction with biologically relevant ions and molecules in aqueous solution has been demonstrated. The sensor molecule, QPA has shown selectivity towards Fe3+ among eleven metal ions studied. The Fe3+ complex of QPA (FeQPA) selectively interacts with F- among halides by ∼4 fold fluorescence enhancement. Further, FeQPA has shown