Dynamic light scattering and 31P NMR spectroscopy study of the self-assembly of deoxyguanosine 5'-monophosphate

2002 ◽  
Vol 7 (1) ◽  
pp. 95-102 ◽  
Author(s):  
L. Spindler ◽  
I. Drevenšek Olenik ◽  
M. Čopič ◽  
R. Romih ◽  
J. Cerar ◽  
...  
2021 ◽  
Vol 12 (1) ◽  
pp. 270-281
Author(s):  
Stefan Bitter ◽  
Moritz Schlötter ◽  
Markus Schilling ◽  
Marina Krumova ◽  
Sebastian Polarz ◽  
...  

The self-organization properties of a stimuli responsive amphiphile can be altered by subjecting the paramagnetic oxidized form to a magnetic field of 0.8 T and monitored in real time by coupling optical birefringence with dynamic light scattering.


Synthesis ◽  
2018 ◽  
Vol 51 (02) ◽  
pp. 421-432 ◽  
Author(s):  
Julia Deschamp ◽  
Marc Lecouvey ◽  
Jade Dussart ◽  
Maelle Monteil ◽  
Olivier Gager ◽  
...  

A general synthetic procedure was developed for H-α-hydroxyphosphinates via Abramov reaction. The present work is a complementary study to those reported till now. This methodology has the advantage that it can be applied to various aliphatic and (hetero)aromatic substrates. The H-α-hydroxyphosphinates were easily purified and obtained in good to excellent yields in shorter times. A 31P NMR spectroscopy study has shown that only 2 equivalents of a silylating agent were required.


Author(s):  
Diogo Eberhardt ◽  
Robélio Marchão ◽  
Hervé Quiquampoix ◽  
Christine Le Guernevé ◽  
Volaniaina Ramaroson ◽  
...  

2019 ◽  
Vol 64 (9) ◽  
pp. 855
Author(s):  
V. A. Trush ◽  
O. O. Litsis ◽  
T. Yu. Sliva ◽  
Ya. O. Gumenyuk ◽  
V. M. Amirkhanov

A series of lanthanide coordination compounds with dimethyl-N-trichloroacetylamidophosphate CCl3C(O)N(H)P(O)(OCH3)2 (HL) [HL = CCl3C(O)N(H)P(O)(OCH3)2 is a ligand of the carbacylamidophosphate (CAPh) type], whose compositions are described by the formula [LnL3 · Phen], where Ln = La, Ce, Pr, Nd, Sm, Tb, Dy, Ho, and Er; L is the deprotonized form of HL; and Phen is 1,10-Phenantroline, has been synthesized. Acetonic solutions of HL and complexes synthesized on its basis are studied by means of 1H- and 31P-NMR spectroscopy at room temperature (298 K). Since the chemical shifts of 1H signals have the pseudocontactorigin, the isotropic shifts of 31P signals are managed to be decomposed into the contact and pseudocontact components. It is found that there are two series of complexes in the solution of [LnL3 · Phen] compounds with the same structure of the coordination sphere within each of the series Ln = (Ce, Pr, Nd, Sm) (series L1) and Ln = (Tb, Dy, Ho, Er) (series L2). The values of the constant of superfine interaction for those complexes are calculated: 0.18 MHz (series L1) and 0.13 MHz (series L2).


2004 ◽  
Vol 13 (1) ◽  
pp. 27-33 ◽  
Author(s):  
L. Spindler ◽  
I. Dreven?ek-Olenik ◽  
M. Copic ◽  
J. Cerar ◽  
J. ?kerjanc ◽  
...  

2020 ◽  
Vol 27 (9) ◽  
pp. 923-929
Author(s):  
Gaurav Pandey ◽  
Prem Prakash Das ◽  
Vibin Ramakrishnan

Background: RADA-4 (Ac-RADARADARADARADA-NH2) is the most extensively studied and marketed self-assembling peptide, forming hydrogel, used to create defined threedimensional microenvironments for cell culture applications. Objectives: In this work, we use various biophysical techniques to investigate the length dependency of RADA aggregation and assembly. Methods: We synthesized a series of RADA-N peptides, N ranging from 1 to 4, resulting in four peptides having 4, 8, 12, and 16 amino acids in their sequence. Through a combination of various biophysical methods including thioflavin T fluorescence assay, static right angle light scattering assay, Dynamic Light Scattering (DLS), electron microscopy, CD, and IR spectroscopy, we have examined the role of chain-length on the self-assembly of RADA peptide. Results: Our observations show that the aggregation of ionic, charge-complementary RADA motifcontaining peptides is length-dependent, with N less than 3 are not forming spontaneous selfassemblies. Conclusion: The six biophysical experiments discussed in this paper validate the significance of chain-length on the epitaxial growth of RADA peptide self-assembly.


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