Synthesis and Self-Assembly of 9,9'-Spirobifluorene-2,2',7,7'-tetracarboxylic Acid and Its Tetraamide. Non-Catenated Formation of Achiral Grid Layers with Large Chiral Pores

2006 ◽  
Vol 71 (2) ◽  
pp. 139-154 ◽  
Author(s):  
Petr Holý ◽  
Martin Havlík ◽  
Miloš Tichý ◽  
Jiří Závada ◽  
Ivana Císařová

The title tetrasubstituted spirobifluorenes 3a, 3b have been designed to serve as convenient achiral tectons for self-assembly of 2D layers with large chiral pores. The underlying stereochemical concept has been confirmed by the results of crystallographic analysis of tetraacid 3a. Self-assembly of isosteric tetraamide 3b led to markedly different results.

2017 ◽  
Vol 2017 ◽  
pp. 1-10
Author(s):  
Dimitrios Matiadis ◽  
Dimitrios Tsironis ◽  
Valentina Stefanou ◽  
Olga Igglessi–Markopoulou ◽  
Vickie McKee ◽  
...  

In this work we present a structural and spectroscopic analysis of a copper(II) N-acetyl-5-arylidene tetramic acid by using both experimental and computational techniques. The crystal structure of the Cu(II) complex was determined by single crystal X-ray diffraction and shows that the copper ion lies on a centre of symmetry, with each ligand ion coordinated to two copper ions, forming a 2D sheet. Moreover, the EPR spectroscopic properties of the Cu(II) tetramic acid complex were also explored and discussed. Finally, a computational approach was performed in order to obtain a detailed and precise insight of product structures and properties. It is hoped that this study can enrich the field of functional supramolecular systems, giving place to the formation of coordination-driven self-assembly architectures.


2011 ◽  
Vol 89 (10) ◽  
pp. 1264-1276 ◽  
Author(s):  
Katie Campbell ◽  
Kristopher J. Ooms ◽  
Michael J. Ferguson ◽  
Peter J. Stang ◽  
Roderick E. Wasylishen ◽  
...  

The use of three shape-persistent, conjugated macrocycles 2a–2c as ligands for self-assembly reactions is described. The macrocycles have been characterized through a combination of spectroscopic analyses and, for compounds 2b and 2c, X-ray crystallographic analysis. Whereas the reaction of 2a with the cis-Pt(II) species 3 successfully provides the porous solid 4a, the analogous reaction of 2b and 2c with 3 leads only to mixtures of products. The application of continuous-flow hyperpolarized 129Xe NMR spectroscopy to investigate the solid-state pores of macrocycles 2b and 2c and the supramolecular complex 4a as a function of temperature is described. All three species show permanent porosity upon removal of co-crystallized solvent molecules. Using trends in the 129Xe chemical shifts and temperature-dependent dynamics of Xe atoms in the solids, information is obtained on the nature of the pores in these systems. Using the 129Xe NMR data for complex 4a, the effective heat of adsorption (ΔHads) was calculated to be ~29 kJ mol–1.


2010 ◽  
Vol 39 (19) ◽  
pp. 4541 ◽  
Author(s):  
Marta Martínez Belmonte ◽  
Sander J. Wezenberg ◽  
Robert M. Haak ◽  
Daniele Anselmo ◽  
Eduardo C. Escudero-Adán ◽  
...  

Author(s):  
Wei Li ◽  
Jianbin Chen ◽  
Chengdong Zhang ◽  
Yudie Li ◽  
Lijia Wan ◽  
...  

The molecular self-assembly of carboxylic acid molecules on a solid surface plays an important role in understanding the nanoscale-precision construction of functional patterns. In this study, the mixing behavior of...


2012 ◽  
Vol 534 ◽  
pp. 118-121 ◽  
Author(s):  
Wen Jie He ◽  
Cheng En He ◽  
Ren Gui Peng ◽  
Ying Kui Yang

A perylene-containing polyimide (PPI) has been successfully synthesized by thermal polycondensation of perylene-3,4,9,10-tetracarboxylic acid dianhydride and 2,2′-(ethylenedioxy)-diethylamine at high temperature. The as-prepared graphite oxide was ultrasonically exfoliated followed by solvothermal-reduction in N-methyl-2-pyrrolidone in the presence of PPI, yielding PPI-functionalized graphene nanosheets. It was found that PPI chains were non-covalently attached to the conjugated basal plane of graphene to form self-assembly nanostructures by π–π stacking. The present work may open a new route for the fabrication of polymer composites containing graphene.


2000 ◽  
pp. 41-42 ◽  
Author(s):  
Kenji Kobayashi ◽  
Toshiaki Shirasaka ◽  
Ernst Horn ◽  
Naomichi Furukawa ◽  
Kentaro Yamaguchi ◽  
...  

2018 ◽  
Vol 203 ◽  
pp. 42-49 ◽  
Author(s):  
S. Sowmiyha ◽  
Vadivel Vinod Kumar ◽  
Jayaraman Pitchaimani ◽  
Vedichi Madhu ◽  
Raman Thiagarajan ◽  
...  

2012 ◽  
Vol 554-556 ◽  
pp. 39-42
Author(s):  
Chun Hua Liu ◽  
Yun Zhi Xie ◽  
Yong Dong Li ◽  
Xun Li ◽  
Yi Bao Li ◽  
...  

The compound of perylene-3,4,9,10-tetracarboxylic acid (PTCA) has been synthesized and characterized. By varying the concentration, it can be used to modulate the supramolecular self-assembly morphologies. Atom force microscopy (AFM) images show that the nano-layer structure will be obtained in relatively high concentration. This structure mainly depends on the intermolecular hydrogen-bonding and π–π stacking interactions.


1999 ◽  
Vol 40 (50) ◽  
pp. 8883-8886 ◽  
Author(s):  
Kenji Kobayashi ◽  
Toshiaki Shirasaka ◽  
Ernst Horn ◽  
Naomichi Furukawa

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