Chemical controls on uranyl citrate speciation and the self-assembly of nanoscale macrocycles and sandwich complexes in aqueous solutions

2015 ◽  
Vol 51 (25) ◽  
pp. 5306-5309 ◽  
Author(s):  
M. Basile ◽  
D. K. Unruh ◽  
K. Gojdas ◽  
E. Flores ◽  
L. Streicher ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Structural Characterization ◽  
Self Assembly ◽  
Spectroscopic Studies ◽  
The Self ◽  
Sandwich Complexes

Speciation and molecular self-assembly of uranyl citrate complexes have been determined based upon structural characterization and spectroscopic studies.

Synthesis and Solution Self-Assembly Behavior of Porphyrin Tethered by Fullerene C60

2013 ◽  
Vol 668 ◽  
pp. 696-700 ◽  
Author(s):  
Wilson Lelei Sitienei ◽  
Lodrick Makokha Wangatia ◽  
Ting Zeng ◽  
Bin Sun ◽  
Mei Fang Zhu
Keyword(s):  
Self Assembly ◽  
Material Design ◽  
Spectroscopic Studies ◽  
Fullerene C60 ◽  
The Self ◽  
Steady State Fluorescence ◽  
Spectrum Measurement ◽  
Novel Material ◽  
Assembly Behavior ◽  
Soret Absorption

This paper focuses on the synthesis, spectroscopic studies and self-assembly behavior of porphyrin phenyl linked fullerene C60 dyad, which included COOH groups in its fullerene unit so as to promote its adsorption onto TiO2. UV-Vis spectrum and steady-state fluorescence spectrum measurement, showed that the self-assembly of this compound in different solvents with different polarities. The results show that the soret absorption peak slightly blue shifted by 5 nm in acetonitrile and 2 nm in tetrahydrofuran, while the soret peaks in toluene solution was the same as in chloroform. Increasing concentration from 1x10-6 mol/L to 2x10-5 mol/L in chloroform resulted into aggregation, also the slight red shifting on cooling from 900C to 100C was observed from a temperature dependant UV-Vis absorption spectra, thus indicates aggregation. All these features may indicate presence of J-type aggregation happening in 4-methylphenyl-H2porhyrin-fullerene C60-COOH. In addition, the fluorescence of 4-methylphenyl-H2Porhyrin-fullerene C60-COOH has been quenched compared to that of pure 4-methylphenyl-H2porhyrin-OH under the same concentration. Therefore, this novel material design may find good application in photoelectric devices.

Impact of Polymer Microstructure on the Self-Assembly of Amphiphilic Polymers in Aqueous Solutions

2007 ◽  
Vol 40 (12) ◽  
pp. 4276-4286 ◽  
Author(s):  
Roger C. W. Liu ◽  
Agnès Pallier ◽  
Marc Brestaz ◽  
Nadège Pantoustier ◽  
Christophe Tribet
Keyword(s):  
Aqueous Solutions ◽  
Self Assembly ◽  
Amphiphilic Polymers ◽  
The Self ◽  
Polymer Microstructure
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