Dielectric Relaxation in Hydrogen Bonded Urea-Based Supramolecular Polymer N,N'-di(2,2-dipentylheptyl)urea

Dielectric Relaxation in Hydrogen Bonded Urea-Based Supramolecular Polymer N, N ′-di(2,2-dipentylheptyl)urea

Results of the dielectric relaxation studies, performed for supramolecular polymer formed by N, N ′-di(2,2-dipentylheptyl)urea dissolved in carbon tetrachloride, are presented. The measurements were done for N, N ′-di(2,2-dipentylheptyl)urea concentration up to about 7% (in mole fraction) in the frequency region from 100 kHz to 100 MHz and at the temperatures from 5◦C to 50◦C. The analysis of t...

Multiple Hydrogen-Bonded Supramolecular Polymers

A highly stable quadruply hydrogen-bonded heterocomplex useful for supramolecular polymer blends.

The butyl urea of guanosine (UG) presents an ADDA hydrogen-bonding array that is complementary to the DAAD array of 2,7-diamido-1,8-naphthyridine (DAN). The stability of the DAN.UG complex was measured by fluorimetry using the fluorescence resonance energy transfer (FRET) from the naphthyridine ring to a coumarin 343 moiety linked covalently to the UG unit. The quadruply hydrogen-bonded complex...

Hydrogen bonded supramolecular polymers in moderately polar solvents.

Hydrogen bonded assemblies are usually decomposed by polar organic solvents. However, we have succeeded in preparing a strongly associated supramolecular polymer which forms viscous solutions in competitive solvents such as tetrahydrofuran.

Alternation and tunable composition in hydrogen bonded supramolecular copolymers.

Sequence control in supramolecular copolymers is limited by the selectivity of the associating monomer end groups. Here we introduce the use of monomers with aminopyrimidinone and aminohydroxynaphthyridine quadruple hydrogen bonding end groups, which both homodimerize, but form even stronger heterodimers. These features allow the formation of supramolecular copolymers with a tunable composition...