scholarly journals Molecular interactions of DNA with transfectants: a study based on infrared spectroscopy and quantum chemistry as aids to fluorescence spectroscopy and dynamic light scattering analyses

RSC Advances ◽  
2014 ◽  
Vol 4 (91) ◽  
pp. 49620-49627 ◽  
Author(s):  
A. Lucotti ◽  
M. Tommasini ◽  
D. Pezzoli ◽  
G. Candiani
Keyword(s):  
Infrared Spectroscopy ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Fluorescence Spectroscopy ◽  
Quantum Chemistry ◽  
Molecular Interactions

Study of stabilization of self-assembly processes in fullerene C60 solution

2021 ◽  
Vol 23 (3) ◽  
pp. 12-14
Author(s):  
U.K. Makhmanov ◽  
A.M. Kokhkharov ◽  
Sh.A. Esanov ◽  
B.A. Aslonov ◽  
B.A. Sindarov ◽  
...  
Keyword(s):  
Refractive Index ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Molecular Interactions ◽  
Self Assembly ◽  
Fullerene C60 ◽  
Self Organization ◽  
Final Size ◽  
Initial Concentration ◽  
Xylene Solution

The dynamics of changes in the values of the refractive index of solutions of C60 in xylene at various concentrations has been studied by the refractometric method. It was found that the deviation from the linear form of the dependence of the refractive index on the C60 concentration occurs at a C60 concentration of 1.8 mg/ml. The deviation is associated with the largest number of molecular interactions between C60−C60 and the formation of large nanoclusters on their basis in solution. It was found by the dynamic light scattering (DLS) that the final size of C60 nanoclusters in solution depends on the initial concentration of the solute. A higher initial concentration of C60 leads to the synthesis of nanoclusters with a larger diameter. Using the method of optical spectroscopy, the processes of self-organization of fullerene C60 molecules in a xylene solution in time are studied. The character of stability of synthesized fullerene nanoclusters in solution is discussed. The results obtained are of particular importance for numerous applications of nanotechnology for understanding self-assembly processes and the development of new nanomaterials.

Supramolecular Structures of Low-Molecular-Weight Polybutadienes, as Studied by Dynamic Light Scattering, NMR and Infrared Spectroscopy

2001 ◽  
Vol 34 (26) ◽  
pp. 9023-9031 ◽  
Author(s):  
Jiří Podešva ◽  
Jiří Dybal ◽  
Jiří Spěváček ◽  
Petr Štěpánek ◽  
Peter Černoch
Keyword(s):  
Molecular Weight ◽  
Infrared Spectroscopy ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Supramolecular Structures ◽  
Low Molecular Weight

Comparison of Optical Properties of Pyrazoline Derivative Nanoparticles

2007 ◽  
Vol 119 ◽  
pp. 39-42 ◽  
Author(s):  
Hyo Sim Kang ◽  
Sun Wha Oh ◽  
Young Soo Kang
Keyword(s):  
Optical Properties ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Fluorescence Spectroscopy ◽  
Phenyl Ring ◽  
Organic Nanoparticles ◽  
Size Dependent ◽  
Reprecipitation Method ◽  
Pyrazoline Derivative

We prepared various pyrazoline derivatives which possess dimethylamino-, ethoxy-, isopropyl-phenyl ring at the 5-position of pyrazoline. The nanoparticles of pyrazoline derivative ranging from tens to hundreds of nanometers by the reprecipitation method have been successfully prepared and their optical size-dependent properties have been investigated with UV-vis, fluorescence spectroscopy, DLS (Dynamic Light Scattering) and SEM. The size-dependent optical properties of pyrazoline organic nanoparticles have been observed in the order of dimethylamino- > ethoxy- > isopropyl- in electro-donating characters.

scholarly journals Thermo-responsiveness of polysiloxanes grafted with poly(dimethyl acrylamide) segments

2012 ◽  
Vol 10 (4) ◽  
pp. 1338-1348 ◽  
Author(s):  
Anca Rusu Hodorog ◽  
Constanta Ibanescu ◽  
Ioana Moleavin ◽  
Nicolae Hurduc
Keyword(s):  
Phase Transition ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Fluorescence Spectroscopy ◽  
Methyl Methacrylate ◽  
Lower Critical Solution Temperature ◽  
Solution Temperature ◽  
Side Chain ◽  
Critical Solution Temperature ◽  
Aggregation Phenomena

AbstractThermo-sensitive polymers are of outstanding importance due to their ability to undergo controlled major changes in their properties as a response to minor modifications in temperature. The syntheses of novel polymers by grafting polysiloxane containing chlorobenzyl groups in the side chain by the homopolymerization of N,N′-dimethyl acrylamide (DMA) or the copolymerization of DMA and methyl methacrylate (MMA) using SET-LRP technique are presented. The polymers were characterized by 1H-NMR, UV, and fluorescence spectroscopy, and DSC. The thermo-sensitivity and the lower critical solution temperature (LCST), as well as the aggregation phenomena during the phase transition are evidenced by dynamic light scattering (DLS) and rheology.

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