A new nanosized host-guest supramolecular coordination polymer based on copper cyanide network and 1,7-diaminoheptane: Comparative structure study and catalytic activity

Abstract

• A new 3D-host-guest supramolecular coordination polymer (SCP); ∞ 3 [(Cu 3 (CN) 3 ) 2 .(DAHP)], 1 had been synthesized by self-assembly at ambient conditions. • The [Cu 3 (CN) 3 ] 2 building blocks create unique complex structure containing the minicycle [Cu 2 (μ 3 -CN) 2 ] motif with wide cavities enable to capsulate the long chain DAHP as guest molecule. • The topology of 1 had been compared with the prototype SCP containing different aliphatic diamines. • The catalytic and photo-catalytic activity of 1 was studied for mineralization of methylene blue (MB) utilizing H 2 O 2 as an oxidant. New single crystals and the nanoscale particles of 3D-host-guest supramolecular coordination polymers (SCP 1 and 2 ); ∞ 3 [(Cu 3 (CN) 3 ) 2 .(DAHP)], [ 1,7-diaminoheptane=.(DAHP)] had been synthesized by self-assembly and utilizing ultrasonic radiation, respectively. X-ray single crystal diffraction of SCP 1 supported the formation of the [Cu 3 (CN) 3 ] 2 units exhibiting tetrahedral geometry of copper(I) atoms which had been assembled in unique way to construct 3D-network. The neutral [Cu 3 (CN) 3 ] 2 building blocks create pretty-complex structure containing the unique [Cu 2 (μ 3 -CN) 2 ] motif with wide cavities enable to capsulate the long chain DAHP as guest molecule. The topology and purity of 1 and 2 had been studied by elemental analysis, PXRD, IR-spectra, TEM and thermogravimetric analysis. The topology of 1 had been compared with the prototype SCPs containing different aliphatic diamines which indicated the effect of structural variability and flexibility of aliphatic diamines on the network structure of these SCP. The catalytic and photo-catalytic activity of the nanosized 2 was studied for mineralization of methylene blue (MB) utilizing H 2 O 2 as an oxidant.