Hybrid
organic–inorganic perovskites with structural transformation
have garnered continued interest in recent years for their potential
as multifunctional materials in the field of optoelectronics and smart
devices. Herein, we report a novel hybrid organic–inorganic
halide, [C5NOH12]2[Cd1.5Cl5(H2O)] (1). Remarkably, the
centrosymmetric compound 1 undergoes a structural transformation
to a novel noncentrosymmetric hybrid perovskite [C5NOH12][CdCl3] (2) after dehydration. Accompanied
by the chemical bond cleavage and reorganization, the zero-dimensional
(0D) trinuclear cluster in compound 1 transforms into
an intriguing one-dimensional (1D) hexagonal perovskite structure
in compound 2, generating multiple optoelectronic switching
behaviors. It is worth mentioning that compound 2 demonstrates
successive structural phase transitions at 353 and 405 K, resulting
in switchable second harmonic generation (SHG) and a dual dielectric
response. In addition, compounds 1 and 2 both feature blue-light luminescence, with respective photoluminescence
lifetimes of 0.73 and 1.42 ns. This work will offer a pioneering approach
and expansive potential for the preparation and development of hybrid
organic–inorganic perovskite materials with superior properties.