Moieties that promote intermolecular cooperativity are attached as pendants to organic electro-optic chromophores effecting a reduction in lattice dimensionality and influencing the poling-induced order of chromophores. Theory relates centric and acentric order parameters to lattice dimensionality. Experimentally, centric order parameters are defined by VAPRAS and VASE, while the acentric order parameters are extracted from ATR. Molecular cooperativity also influences viscoelastic properties. SM-FM demonstrates the existence of a distinct phase of matter of reduced dimensionality. IFA permits definition of the entropy change associated with the reduced dimensionality. The correlation of IFA and DRS data permits definition of the cooperativity length scale.