LAUSR

Abstract Two copper(I) coordination polymers, {[Cu 2 (pmb)(4,4′-bipyridine)(PPh 3 ) 2 ] (BF 4 ) 2 (CH 3 CN) 2 } n ( 1 ) and {[Cu 2 (pmb)(bpe)(PPh 3 ) 2 ](BF 4 ) 2 (CH 3 CN)(H 2 O)} n ( 2 ) (pmb = N,N′-bis(pyridin-2-ylmethylene)benzene-1,4-diamine, bpe = 1,2-bis(4-pyridyl)ethylene), PPh 3  = triphenylphosphine), have been prepared and characterized by IR, 1 H NMR, 13 C NMR, 31 P NMR, 19 F NMR, 11 B NMR, TG and X-ray crystal structure analysis. The structural analysis shows that each 1D zig-zag chain in 1 interacts with neighbouring acetonitrile molecules, interestingly, which results in the formation of CN⋯π interactions around this chain. For 2 , 1D helical tube is formed by directly linking horse-shoe shaped collar with a 32-membered split ring, while C–H⋯π interaction results in the stacking of 1D helical tube into a 3D network. In complexes 1 and 2 , the solid-state UV–Vis absorption peaks show the existence of MLCT absorption. Furthermore, complexes 1 and 2 indicate efficient luminescent emission peaks near 450 nm attributed to MLCT excited states, and the emission decay lifetimes of complexes 1 and 2 are 28.33 μs and 29.99 μs, showing strong solid-state photoluminescence at room temperature. In addition, TG-DTA reveals that the heat stability of these complexes is 1  >  2 .