期刊
JOURNAL OF ORGANOMETALLIC CHEMISTRY
卷 637, 期 -, 页码 426-434出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0022-328X(01)00946-9
关键词
ferrocenecarboxaldehydes; knoevenagel condensation; NLO properties; hyper-Rayleigh scattering
We report a new method for the condensation of nonamethylferrocenecarboxaldehyde, 3-ferrocenylacrolein, 5-ferrocenylthiophene-2-carboxaldehyde and 5'-ferrocenyl-2,2' -bithienyl-5-carboxaldehyde inorganic supports, with methylene active compounds on the inorganic supports. In this way, conditions leading to very high yield ( > 70%) of the product could be achieved. The effect of sonication during the synthesis of nonamethylferrocenecarboxaldehyde is reported and appears to be of great importance. We also report a new method for the synthesis of 3-ferrocenylacrolein. The second-order non-linear optical (NLO) properties of these ferrocenecarboxaldehyde condensation products are measured with the hyper-Rayleigh scattering (HRS) technique. The results of a similar study made for the condensation products of the above-mentioned aldehydes with malononitrile and indan-1,3-indandione are also given. (C) 2001 Elsevier Science B.V. All rights reserved.
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