The synthesis, crystal structure and optical limiting properties of ZnI2-pyrazine adduct polymer linked by iodine· · ·iodine supramolecular soft–soft interaction

The structure and molecular packing of a ZnI2-pyrazine adduct are reported. Attractive zigzag I· · ·I interactions dominate the molecular packing in the structure and link ZnI2-pyz zigzag chains to result in the formation of three-dimensional network structure. The optical limiting property was studied by Z-scan technology with an 8 ns-pulsed laser at 532 nm. The limiting threshold was determined to be 0.13 J cm22, which is comparable to those of many heterothiometallates. q 2003 Elsevier B.V. All rights reserved.