### Abstract

A Monte Carlo analysis is presented which establishes a relationship between the rotational diffusion coefficients and the flexibility (persistence length, P) of short, wormlike chains. The results of this analysis are presented in terms of experimentally observable quantities; namely, the rotational relaxation times for the field‐free decay of optical anisotropy. The pertinent theoretical quantity is R, defined as the ratio of the longest rotational relaxation time of a wormlike chain to the transverse rotational relaxation time of a rigid cylinder having the same axial length (L) and segmental volume. R, so defined, is essentially independent of the axial ratio of the cylinder for any value of L/P within the range of validity of the present analysis (axial ratio > 20; 0.1 < L/P < 5). It is pointed out that P can be determined with reasonable accuracy even in the absence of a precise knowledge of the local hydrodynamic radius of the chain.

Original language | English (US) |
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Pages (from-to) | 1481-1502 |

Number of pages | 22 |

Journal | Biopolymers |

Volume | 20 |

Issue number | 7 |

DOIs | |

State | Published - 1981 |

Externally published | Yes |

### ASJC Scopus subject areas

- Biophysics
- Biochemistry
- Biomaterials
- Organic Chemistry

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## Cite this

*Biopolymers*,

*20*(7), 1481-1502. https://doi.org/10.1002/bip.1981.360200709