A side-chain engineering strategy can dramatically improve dye delivery by fine-tuning the adsorption and desorption abilities of the transmembrane process, enabling ultralow loading bioimaging and deep tissue penetration.
Catalytic Hydrolysis of Phosphate Monoester by Supramolecular Phosphatases Formed from a Monoalkylated Dizinc(II) Complex, Cyclic Diimide Units, and Copper(II) in Two-Phase Solvent System
作者:Akib Bin Rahman、Hiroki Imafuku、Yuya Miyazawa、Ananda Kafle、Hideki Sakai、Yutaka Saga、Shin Aoki
DOI:10.1021/acs.inorgchem.8b03586
日期:2019.5.6
design and synthesis of asymmetric (nonsymmetric) supermolecules by the 2:2:2 self-assembly of an amphiphilic zinc(II)–cyclen complex containing a 2,2′-bipyridyl linker and one long alkyl chain (Zn2L3), barbital analogues, and Cu2+ as model compounds of an enzyme alkaline phosphatase that catalyzes the hydrolysis of phosphate monoesters such as mono(4-nitrophenyl)phosphate at neutral pH in two-phase
在包括金属配合物和金属螯合剂在内的多个结构单元之间具有程序化分子相互作用的酶模拟物的设计和合成具有智力和实践意义。模仿天然酶如水解酶,磷酸酶等的人造酶的制备仍然是超分子化学领域中的巨大挑战。本文中,我们通过两亲性锌(II)-环素络合物的2:2:2自组装,设计和合成了不对称(非对称)超分子,该两性化合物含有2,2'-联吡啶基接头和一条长烷基链(锌2 L 3),巴比妥类似物和Cu 2+作为碱性磷酸酶的模型化合物,该酶在中性pH下在两相溶剂系统(H 2 O / CHCl 3)中在pH 7.4和37°C下催化磷酸单酯(例如单(4-硝基苯基)磷酸酯)的水解。发现这些复合物的水解活性具有催化作用,其催化转换数为3-4。基于反应混合物的H 2 O和CHCl 3相的UV / vis和发射光谱的机理研究表明,超分子催化剂的亲水性/疏水性平衡是催化活性的重要因素。
The Synthesis of Long-Chain α-Alkyl-β-Hydroxy Esters Using Allylic Halides in a Fráter-Seebach Alkylation
作者:Ashna A. Khan、Stephanie H. Chee、Bridget L. Stocker、Mattie S. M. Timmer
DOI:10.1002/ejoc.201101472
日期:2012.2
diastereoselectively introduce α-substituents to chiral β-hydroxy esters, however, the yields of reactions in which longer chain alkyl halides are used can be disappointing. To provide a more robust protocol for the alkylation of β-hydroxy esters, we prepared a variety of long-chain allylic iodides with the view that the greater reactivity of the allylic system would
Process for the detection of molecular or ionic species
申请人:Commissariat a l'Energie Atomique
公开号:US04871680A1
公开(公告)日:1989-10-03
A process and an apparatus for the detection of molecular or ionic species, comprising: (a) contacting a gaseous or liquid medium containing the species to be detected with a film comprising at least one monomolecular layer of amphiphilic compound chosen from among the tetracyanoquinodimethane (TCNQ) charge transfer complexes and the tetracyanoquinodimethane (TCNQ) salts, which conduct electricity or are precursors of electricity conducting charge transfer complexes and (b) determining the variation of one of the physical properties of the film. It is in particular possible to use layers of TCNQ alkyl-pyridinium, TCNQ alkyl-quinolinium, for detecting iodine, nitrogen oxides and fluoric compounds.