  During the last half-decade, a new class of ferroic-fluid, ferroelectric
nematic liquid crystals (NFLCs), creates a noise owing to its exceptional
properties such as a colossal polarization, high electro-optic activity plus
high fluidity. Regardless of recent huge efforts on design and development of
new NFLC molecules based on molecular parameters, the control of NF phase
transitions and the stabilization of NF phase are still challenging. Here we
discuss the impact of mixing of DIO diastereomer [transDIO (1) and cisDIO (2)]
to the NF phase transition, in terms of the smectic cybotactic cluster
formation examined by X-ray diffraction. Interestingly, the result suggests
that smooth exchange of NFLC 1 by non-LC 2 both with similar dipole and
molecular backbone plays a role in the alteration of the NF phase transition.
