Chromophores in Conjugated Polymers-All Straight?

What is the physical shape of the π‐electron system in a large macromolecule such as a conjugated polymer? Although intuitively one may argue that any departure from rigidity by bending or twisting should disrupt conjugation, leading to the formation of discrete chromophores, single‐molecule and ensemble time‐resolved studies support the notion that the π‐bond is remarkably persistent in space: even individual chromophores can be bent and twisted, so that caution is warranted when interpreting a wide range of polarisation‐based spectroscopies. What shape is it? Single‐molecule and ensemble time‐resolved studies support the notion that the π‐bond in large macromolecules, such as conjugated polymers, is remarkably persistent in space: even individual chromophores can be bent and twisted, so that caution is warranted when interpreting a wide range of polarization‐based spectroscopies.