1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Intramolecular relaxation dynamics in semiflexible dendrimers
Rent:
Rent this article for
USD
10.1063/1.3598336
/content/aip/journal/jcp/134/21/10.1063/1.3598336
http://aip.metastore.ingenta.com/content/aip/journal/jcp/134/21/10.1063/1.3598336

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of the model dendrimer. The circles represent monomers and the simple harmonic springs represent the bond between two monomers. Dendrimer represented here contains three generations g = 3, branch functionality f = 3, and spacer n = 1. Note that this would be a second generation dendrimer according to definition in Ref. 11.

Image of FIG. 2.
FIG. 2.

Sketch of the different conformations of semiflexible dendrimers. (a) The compressed conformation of dendrimer with ϕ = 30°, (b) the expanded conformation of dendrimer with ϕ = 150°, (c) the conformation with unrestricted bond orientation ϕ = 0 resembling the freely rotating model, (d) La Ferla's model dendrimer (Ref. 11).

Image of FIG. 3.
FIG. 3.

Plots of the storage and loss moduli of semiflexible dendrimers with bond orientation angles ϕ = 0, ϕ = 30°, and ϕ = 150° as a function of adimensional frequency in the partial draining limit HI, (i), (ii) and (iii), (iv) for model dendrimers CSM1, ESM1 and CSM4, ESM4 compared to ϕ = 0. Here, dotted, dashed, and solid lines denote dendrimers with ϕ = 0, ϕ = 30°, and ϕ = 150°, respectively, with number of generations varying from g = 2 to 10.

Image of FIG. 4.
FIG. 4.

The storage and loss moduli plots for the semiflexible dendrimers with ϕ = 30° (CSM4), ϕ = 150° (ESM4), and ϕ = 0 for generation g = 8 in presence of HI, (i), (ii) compared to the flexible dendrimer, (iii), (iv) compared to the semiflexible ones in absence of HI. Here, dashed, dashdotted and solid lines represent semiflexible dendrimers with ϕ = 0, ϕ = 30°, and ϕ = 150° in presence of HI respectively and squares, crosses and triangles represent the corresponding ones in absence of HI, and circles for the flexible model.

Image of FIG. 5.
FIG. 5.

Plots for the dielectric relaxation moduli of semiflexible dendrimers with ϕ = 0, ϕ = 30°, and ϕ = 150° as a function of adimensional frequency in presence of HI, (i), (ii) for model dendrimers CSM1, ESM1 and ϕ = 0. (iii), (iv) for model dendrimers CSM4, ESM4 and ϕ = 0. Here, dotted, dashed, and solid lines denote semiflexible dendrimers with ϕ = 0, ϕ = 30°, and ϕ = 150°, respectively, with number of generation ranging from g = 2 to 10. The arrows represent the the location of maxima for the dendrimer with ϕ = 0, ϕ = 30°, and ϕ = 150°, respectively.

Image of FIG. 6.
FIG. 6.

The dielectric moduli plots for semiflexible dendrimers with ϕ = 0 ϕ = 30° (CSM4) and ϕ = 150° (ESM4) with HI for generation g = 8, (i), (ii) compared to the flexible dendrimer, (iii), (iv) compared to the corresponding semiflexible dendrimers in absence of HI. Here, dashed, dashdotted and solid lines represent semiflexible dendrimers with ϕ = 0, ϕ = 30°, and ϕ = 150° in presence of HI respectively and squares, crosses and triangles represent the corresponding ones in absence of HI, and magenta circles for flexible model. The shift of intra-subunit relaxation are indicated by arrows.

Tables

Generic image for table
Table I.

Selected models (Ref. 24) depicting various combinations of bond direction and orientation angles θ and ϕ of the semiflexible dendrimers (f = 3, m = 2, n = 1).

Loading

Article metrics loading...

/content/aip/journal/jcp/134/21/10.1063/1.3598336
2011-06-07
2014-04-19
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Intramolecular relaxation dynamics in semiflexible dendrimers
http://aip.metastore.ingenta.com/content/aip/journal/jcp/134/21/10.1063/1.3598336
10.1063/1.3598336
SEARCH_EXPAND_ITEM