  Recently the ferroelectric anomaly (Nad, Monceau, et al) followed by the
charge disproportionation (Brown, et al) have been discovered in (TMTTF)2X
compounds. The corresponding theory of the combined Mott-Hubbard state
describes both effects by interference of the build-in nonequivalence of bonds
and the spontaneous one of sites. The state gives rise to three types of
solitons: \pi solitons (holons) are observed via the activation energy \Delta
in the conductivity $G$; noninteger \alpha solitons (the FE domain walls)
provide the frequency dispersion of the ferroelectric response; combined
spin-charge solitons determine G(T) below subsequent structural transitions of
the tetramerisation. The photoconductivity gap 2\Delta is determined by
creations of soliton - antisoliton pairs. The optical edge lies well below,
given by the collective ferroelectric mode which coexists with the combined
electron-phonon resonance and the phonon antiresonance. The charge
disproportionation and the ferroelectricity can exist hiddenly even in the Se
subfamily giving rise to the unexplained yet low frequency optical peak, the
enhanced pseudogap and traces of phonons activation.
