A novel coordination polymer [Co(NCS)2(bpms)2]n (bpms=1,2-bis(4-pyridylmethyl)disulfenyl): synthesis, crystal structure and third-order nonlinear optical properties

✍ Scribed by Hongwei Hou; Yinglin Song; Yaoting Fan; Linping Zhang; Chenxia Du; Yu Zhu

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 152 KB
• Volume: 316
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(01)00391-7

✦ Synopsis

A new 4,4%-bipyridyl-based 'building block', 1,2-bis(4-pyridylmethyl)disulfenyl (bpms) was synthesized. Treatment of the 'building block' with Co(NO 3 ) 2 and KSCN afforded a new type of one-dimensional (1-D) double zigzag chain coordination polymer [Co(NCS) 2 (bpms) 2 ] n . Each Co ion is symmetrically bridged by four bpms ligands and also coordinates with two NCS - anions. The [Co(NCS) 2 (bpms) 2 ] n can be regarded as a layered structure in the solid state. The 1-D parallel chains are stacked ABAB with a rotation of 90°between A and B. [Co(NCS) 2 (bpms) 2 ] n in DMF solution also shows very strong third-order nonlinear optical (NLO) properties, its third-order susceptibility (3) is 1.07× 10 -11 esu in a 2.8 × 10 -3 g cm -3 DMF solution. The data are comparable to those of C60, phthalocyanine derivations and inorganic clusters. To our knowledge, this is the first reported coordination polymer showing strong third-order NLO properties.