Hybrid Molecular-Based Magnets Containing Organic NLO Chromophores: A Search toward an Interplay between Magnetic and NLO Behavior
详细信息 查看全文
- 作者：Pascal G. Lacroix ; Isabelle Malfant ; Sophie Bé ; nard ; Pei Yu ; Eric Riviè ; re ; and Keitaro Nakatani
- 刊名：Chemistry of Materials
- 出版年：2001
- 出版时间：February 2001
- 年：2001
- 卷：13
- 期：2
- 页码：441 - 449
- 全文大小：157K
- 年卷期：v.13,no.2(February 2001)
- ISSN：1520-5002
文摘
A new hybrid molecular-based ferromagnet of formula [(dmaph)PPh3][MnCr(ox)3], where[(dmaph)PPh3]+ stands for the (4-dimethylaminophenyl)triphenylphosphonium cation (ox2-being the oxalate anion), has been synthesized. It crystallizes in the monoclinic P21 spacegroup, with lattice parameters a = 13.954(2) Å, b = 16.297(2) Å, c = 14.323(2) Å, and 
=99.27(1)
. Refinement based on Fo2 yields R = 0.072 and wR2 = 0.156. The compound exhibitsa ferromagnetic interaction between Cr3+ and Mn2+, with a long-range magnetic orderingat TC = 4.5 K. The hyperpolarizability () of the cation is calculated within the frameworkof the INDO/SOS-based method, which indicates a value comparable to that of p-nitroaniline for an absorption maximum at 306 nm (
max = 28 500 M-1 cm-1). This result isconsistent with the observation of a SHG efficiency 4 times that of urea for the parent[(dmaph)PPh3]Br salt, at 1.907 
m. The non-centrosymmetric [(dmaph)PPh3][MnIICrIII(ox)3]derivative is used as a model compound for an investigation of the potential effect of aferromagnetic ordering on the bulk NLO response of hybrid materials made of NLO cationsinserted between magnetic anionic layers.
=99.27(1). Refinement based on Fo2 yields R = 0.072 and wR2 = 0.156. The compound exhibitsa ferromagnetic interaction between Cr3+ and Mn2+, with a long-range magnetic orderingat TC = 4.5 K. The hyperpolarizability () of the cation is calculated within the frameworkof the INDO/SOS-based method, which indicates a value comparable to that of p-nitroaniline for an absorption maximum at 306 nm (max = 28 500 M-1 cm-1). This result isconsistent with the observation of a SHG efficiency 4 times that of urea for the parent[(dmaph)PPh3]Br salt, at 1.907 m. The non-centrosymmetric [(dmaph)PPh3][MnIICrIII(ox)3]derivative is used as a model compound for an investigation of the potential effect of aferromagnetic ordering on the bulk NLO response of hybrid materials made of NLO cationsinserted between magnetic anionic layers.