Hydrogen bonding self-assemblies with 1-D linear, dimeric and hexagonal nanostructures of meso-pyridyl-substituted dipyrromethanes
作者:Hiromitsu Maeda、Masahiro Hasegawa、Atsushi Ueda
DOI:10.1039/b703236f
日期:——
Dipyrromethanes with meso-pyridyl groups form various hydrogen bonding structures such as dimeric and hexagonal structures and infinite chains. The formation of the self-assembled structures and chains depends on the existence of meso-pyridyl nitrogen in the solid state.
Three Distinct Equilibrium States via Self-Assembly: Simple Access to a Supramolecular Ion-Controlled NAND Logic Gate
作者:Dong Sub Kim、Vincent M. Lynch、Jung Su Park、Jonathan L. Sessler
DOI:10.1021/ja4080198
日期:2013.10.2
During the past several decades, considerable effort has focused on self-assembled systems. However, most work has been directed toward understanding the equilibrium between two major chemical entities, namely the dissociated components and the corresponding associated complex. While there are quite a few examples of multiresponsive materials, control over multistate materials has proved difficult to achieve. Here, we report the formation and the interplay of a self-assembled calix[4]pyrrole array that exhibits three limiting forms, namely a 1:1 self-assembled oligomer, a 2:1 capsule, and the corresponding monomers. Interconversion between these states may be controlled by using the tetraethylammonium cation (TEA(+)) and/or iodide anion (I ) as chemical inputs. The combination of self-assembly and ion-based control may be used to create systems that display NAND logic behavior. The system outputs have been confirmed by a variety of analytic methods, including UVvis and 2D H-1 DOSY, NOESY NMR spectroscopy, scanning electron microscopy, and single crystal X-ray diffraction analyses.
Displacement-based, chromogenic calix[4]pyrrole–indicator complex for selective sensing of pyrophosphate anion
作者:Sandeep Kaur、Hoon Hwang、Jeong Tae Lee、Chang-Hee Lee
DOI:10.1016/j.tetlet.2013.04.129
日期:2013.7
A supramolecular complex composed of bis-pyridinium picket calix[4]pyrrole and azophenol indicator is a highly visible colorimetric displacement assay and sensor. The system shows significant selectivity and a higher affinity for pyrophosphate anions over other competing anions. (C) 2013 Elsevier Ltd. All rights reserved.
Self-organization of dipyridylcalix[4]pyrrole into a supramolecular cage for dicarboxylates
Cis- and trans-dipyridylcalix[4]pyrroles were synthesized and cis-dipyridylcalix[4]pyrrole formed a supramolecularcage upon dimerization and coordination with Pd(II). The cage molecule recognised suberate selectively by hydrogen bonding to the two calix[4]pyrroles.
Thermodynamic Characterization of Halide−π Interactions in Solution Using “Two-Wall” Aryl Extended Calix[4]pyrroles as Model System
作者:Louis Adriaenssens、Guzmán Gil-Ramírez、Antonio Frontera、David Quiñonero、Eduardo C. Escudero-Adán、Pablo Ballester
DOI:10.1021/ja412098v
日期:2014.2.26
interactions in solution. We base this research on the thermodynamic characterization of a series of 1:1 complexes formed between halides (Cl(-), Br(-), and I(-)) and several α,α-isomers of "two-wall" calix[4]pyrrole receptors bearing two six-membered aromatic rings in opposed meso positions. The installed aromatic systems feature a broad range of electron density as indicated by the calculated values for their