Interplay between conformational flexibility, intermolecular H-bonding and 3d-metal cation extraction ability in a series of thiacalix[4]arene lower rim disubstituted Schiff base derivatives

被引：0

作者：

Strelnikova, Iuliia V. ^{[1
,2
]}

Ovsyannikov, Alexander S. ^{[1
]}

Gubaidullin, Aidar T. ^{[1
]}

Agarkov, Artem S. ^{[1
]}

Kleshnina, Sophiya R. ^{[2
]}

Iova, A. A. ^{[2
]}

Furer, Victor L. ^{[3
]}

Vandyukov, Alexander E. ^{[1
]}

Solovieva, Svetlana E. ^{[1
]}

Antipin, Igor S. ^{[2
]}

机构：

[1] Russian Acad Sci, Arbuzov Inst Organ & Phys Chem, FRC Kazan Sci Ctr, Arbuzova 8 Str, Kazan 420088, Russia

[2] Kazan Fed Univ, Kremlevskaya 18 str, Kazan 420008, Russia

[3] Kazan State Architect & Civil Engn Univ, 1 Zelenaya Str, Kazan 420043, Russia

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2024年 / 27卷 / 01期

关键词：

MOLECULAR-RECOGNITION; CALIXARENES; COMPLEXES; METAL; SYSTEMS; ZN(II); ION;

D O I：

10.1039/d4cp03393k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The rational design of organic ligands with the aim to control their binding abilities towards different metal ions can be considered as one of the key concepts in supramolecular coordination chemistry. Regarding the macrocyclic compounds of thiacalix[4]arene family, this can be achieved via the targeted modulation of macrocyclic platform rigidity as well as the proper choice of appended binding sites. Four macrocyclic salen-type ligands based on lower rim disubstituted thiacalix[4]arene derivatives, adopted in a cone conformation, bearing highly coordinating iminophenolic or catecholic groups and two -CH2- moieties as spacers but presenting different abilities to form H-bonds, were chosen to elucidate the interplay between the conformational flexibility of the macrocyclic ligands, propensity to participate in the intermolecular H-bonding and the extraction ability of 3d-metal cations. X-ray diffraction analysis, theoretical DFT calculations, IR and Raman spectroscopies, and dynamic light scattering (DLS) studies performed in combination with liquid-liquid metal extraction study revealed that compounds 4, and 6, based on a thiacalix[4]arene macrocyclic platform, display a higher extraction ability towards all studied 3d-metal ions, caused by enhanced conformational flexibility. This is in good accordance with the ability of 6 to form H-bonded supramolecular assemblies in solution and crystalline phases due to recognition between the catecholic moieties.

引用

页码：206 / 217

页数：12