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We demonstrate that the amorphous material PAF-1, C[(C6H4)2]2, forms acontinuous random network in which tetrahedral carbon sites are connected by4,4'-biphenyl linkers. Experimental neutron total scattering measurements ondeuterated, hydrogenous, and null-scattering samples agree with moleculardynamics simulations based on this model. From the MD model, we are able forthe first time to interrogate the atomistic structure. The small-anglescattering is consistent with Porod scattering from particle surfaces, of theform Q^{-4}, where Q is the scattering vector. We measure a distinct peak inthe scattering at Q = 0.45 {\AA}^{-1}, corresponding to the first sharpdiffraction peak in amorphous silica, which indicates the structural analogybetween these two amorphous tetrahedral networks.

Atomic structure of the continuous random network of amorphous C[(C6H4)2]2, PAF-1