合成了一种新型的有机-无机纳米杂化受体4,该受体经双硫脲臂官能化,然后组装在金纳米颗粒上。基于金纳米颗粒(GNP)的表面等离激元吸收的变化,预组织的系统具有苯硫脲单元,用于分光光度法感测二羧酸盐(尤其是丙二酸)。吸收带的强度随着二羧酸盐浓度的增加而逐渐增加。但是,在单硫脲修饰的GNP,受体3和游离受体2进行的对照试验中,未观察到等离激元带中的离子选择性变化。如从定量滴定得出的缔合常数所示,受体4可以选择性识别较短碳链的二羧酸根阴离子,并且对丙二酸具有最高的亲和力。通过1 H NMR和UV-vis光谱法评估了受体4阴离子的相互作用特性。
assembled on goldnanoparticles was synthesized. The preorganized system possesses phenylthiourea units for the spectrophotometric sensing of dicarboxylates, especially malonate, based on changes in the surface plasmon absorption of the goldnanoparticles (GNPs). The intensity of the absorbance band increases gradually with the concentration of dicarboxylates increasing. But such an ion‐selective change
合成了一种新型的有机-无机纳米杂化受体4,该受体经双硫脲臂官能化,然后组装在金纳米颗粒上。基于金纳米颗粒(GNP)的表面等离激元吸收的变化,预组织的系统具有苯硫脲单元,用于分光光度法感测二羧酸盐(尤其是丙二酸)。吸收带的强度随着二羧酸盐浓度的增加而逐渐增加。但是,在单硫脲修饰的GNP,受体3和游离受体2进行的对照试验中,未观察到等离激元带中的离子选择性变化。如从定量滴定得出的缔合常数所示,受体4可以选择性识别较短碳链的二羧酸根阴离子,并且对丙二酸具有最高的亲和力。通过1 H NMR和UV-vis光谱法评估了受体4阴离子的相互作用特性。
Preorganized Fluorescent Receptor for the Preferential Binding of the Glutarate Anion
作者:Miriam Más-Montoya、David Curiel、Carmen Ramírez de Arellano、Alberto Tárraga、Pedro Molina
DOI:10.1002/ejoc.201600521
日期:2016.8
dianion receptor that affords a size‐selective response when a homologous series of dicarboxylates are analyzed. Interestingly, a preferential ratiometric fluorescent response was observed for the glutarate anion during the recognition process, which produced an evident color change in the emitted light.
Pyridinium-based symmetrical diamides as chemosensors in visual sensing of citrate through indicator displacement assay (IDA) and gel formation
作者:Kumaresh Ghosh、Avik Ranjan Sarkar
DOI:10.1039/c1ob05707c
日期:——
The design and synthesis of pyridinium-based symmetrical diamides 1 and 2 along with their anion binding studies through ‘indicator-diplacement assay’ are reported. Both the chemosensors effectively respond in in CH3CN–H2O (4 : 1 v/v) at pH = 6.3 for the selective naked-eye detection of citrate. Additionally, chemosensor 2 (c = 6.29 × 10−3 M) forms a stable gel only with citrate in CH3CN, which validates its visual sensing.
A new class of “pincer” receptors – macrocyclic systems containing an incorporated amide group
作者:Patryk Niedbała、Janusz Jurczak
DOI:10.1080/00958972.2020.1867313
日期:2021.2.1
Abstract Herein we present the synthesis and association analysis of a new family of “pincer” receptors containing units of stable 26-membered tetraamidic macrocyclic scaffolds in their structures. These units, linked by aliphatic or aromatic chains, are capable of binding an anionic guest due to the presence of amide functions playing the role of hydrogen bond donating systems. Such neutral receptors
Abstract Compound 1 bearing urea and viologen groups has been designed and synthesized. It could be used as a colorimetric receptor for dicarboxylate anions due to the significant color changes of the solution upon the addition of dicarboxylates. More importantly, the color changes were related to the chain lengths of the dicarboxylates tested. UV–vis, 1 H NMR and HRMS studies demonstrated that receptor
摘要设计并合成了具有脲基和紫精基团的化合物1。由于加入二羧酸盐后溶液的显着颜色变化,它可用作二羧酸盐阴离子的比色受体。更重要的是,颜色变化与所测试的二羧酸酯的链长有关。紫外可见,1 H NMR和HRMS研究表明,受体1利用氢键和静电相互作用与这些阴离子形成1:1化学计量的配合物。此外,EPR还检测了络合过程中阳离子自由基1 +的生成。