Cambridge Structural Database Hirshfeld surface study IsoStar Pb(II) Protein Data Bank TD-DFT Technology: general issues X-ray crystallography coordination compounds coordination polymer crystal engineering crystal structure crystalline materials hydrazones luminescence nano metal oxide nanorods non-covalent interaction non-covalent interactions noncovalent interactions organometallic compounds pyrazole silver phosphine single-crystal analysis sonochemical route sonochemical-based synthesis supramolecular systems ultrasonic irradiation