Please use this identifier to cite or link to this item:
https://doi.org/10.1039/b000960l
Title: | Crystal structures, molecular packing and picosecond optical limiting properties of quadridentate Schiff base divalent metal complexes derived from S-benzyl dithiocarbazate | Authors: | Zhu, X.-H. Chen, X.-F. Zhang, Y. You, X.-Z Tan, W.-L. Ji, W. Vittal, J.J. Tan, G.-K. Kennard, C.H.L. |
Issue Date: | 2000 | Citation: | Zhu, X.-H., Chen, X.-F., Zhang, Y., You, X.-Z, Tan, W.-L., Ji, W., Vittal, J.J., Tan, G.-K., Kennard, C.H.L. (2000). Crystal structures, molecular packing and picosecond optical limiting properties of quadridentate Schiff base divalent metal complexes derived from S-benzyl dithiocarbazate. New Journal of Chemistry 24 (6) : 419-423. ScholarBank@NUS Repository. https://doi.org/10.1039/b000960l | Abstract: | The neutral divalent metal complexes ML [H2L = 1,4-bis(2'- formylphenyl)-1,4-dioxabutane bis(S-benzyl dithiocarbazate); M = Ni, Pd and Zn] show strikingly different crystal packing patterns. In NiL, C32H28O2N4S4Ni the geometry around the metal atom is shown to be distorted square planar with a shortest Ni(1)···S(1A) (ethereal sulfur) contact of 3.547(2) Å in neighboring molecules. The coordination configuration about PdL, C32H28O2N4S4Pd, is square planar with a closest Pd(1)···S(1A) (thiolato) contact of 3.674(1) Å in neighboring molecules. The molecular packing of PdL in the unit cell is different from that of NiL, but like a previously reported structure of CuL. Unlike NiL and PdL the molecular structure of ZnL, C32H28O2N4S4Zn, has a C2 crystallographic axis and the monomer is woven into a polymeric structure by weak intermolecular S(thiolato)···H interactions of 2.836 Å. The picosecond optical limiting properties of ML [M = Cu(II), Ni(II), Pd(II) and Zn(II)] were investigated. The limiting threshold for PdL is ca. 0.9 J cm- 2, comparable to that of C60 when an aperture is placed in front of the transmission detector, and ca. 2.0 J cm-2 without an aperture. The observed optical limiting effects are attributed to both nonlinear absorption and nonlinear refraction processes. | Source Title: | New Journal of Chemistry | URI: | http://scholarbank.nus.edu.sg/handle/10635/93497 | ISSN: | 11440546 | DOI: | 10.1039/b000960l |
Appears in Collections: | Staff Publications |
Show full item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.