Self-assembly of nanoparticles is an efficient route to fabricating  materials with uniform structures. Many studies to date have reported the synthesis of polymeric and metal-based particles that spontaneously self-assemble into ordered 3D superstructures. The current project is the first to work with hybrid metal-organic particles, adding a new family to the list of compounds that can be synthesised for 3D self-assembly: metal-organic frameworks. Photonic calculations show that these chiral structures can have large complete photonic band gaps. In addition, in the self-assembled chiral square crystal, we also find dual polarization band gaps that selectively forbid the propagation of circularly polarized light of a specific handedness along the helical axis direction. The self-assembly process in our proposed system is robust, suggesting possibilities of using chiral colloids to assemble photonic metamaterials. If they're describing experiments or calculations, they need to supply enough details that an independent researcher could repeat the experiment or calculation to verify the results. It is introduction and presentation for scrutiny of new research, and the critique of existing research articles.