Synthesis, crystal structures, and third-order nonlinear optical properties of two novel complexes of H4edbbp with Zn(II), Cd(II)

✍ Scribed by Yao-Ting Fan; Dong-Xu Xue; Gang Li; Hong-Wei Hou; Chen-Xia Du; Hui-Jie Lu

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 296 KB
• Volume: 707
• Category: Article
• ISSN: 0022-2860
• DOI: 10.1016/j.molstruc.2004.07.013

✦ Synopsis

We synthesized a new organo-diphosphonic acid ligand H 2 O 3 PCH(Ph)NH(CH 2 ) 2 NH(Ph)CHPO 3 H 2 [ethane-1,2-diamino-N,N 0 -bis(benzyl phosphonic)acid, H 4 edbbp] and its two complexes

The complexes 1-2 were structurally characterized by means of X-ray single crystal diffraction. The central ion (MZZn or Cd) has a distorted square-pyramidal coordination environment by three oxygen atoms from phosphonate units and two nitrogen atoms of H 4 edbbp. The fundamental structural units [M 2 (edbbp) 2 ] 4K are linked by extensive intermolecular hydrogen bonds between 1,2-propyldiamine cations and phosphonate oxygen atoms, forming a one-dimensional chain structure. The third-order nonlinear optical (NLO) properties of 2 were determined by Z-scan techniques. NLO refractive index n 2 , c (3) of 2's, and hyperpolarizability g values were calculated to be 1.31!10 K17 m 2 W K1 , 3.19!10 K11 and 8.57!10 K30 esu, respectively. The results indicate that complex 2 exhibits very strong NLO absorption and self-focusing effects.