| 摘要 |
<p>Langmuir Blodgett films are provided having second order molecular hyperpolarizability of at least 30.10<-><5><0>c<3>m<3>J<-><2>. combined with chemical stability and a melting point of over 70 DEG . They also have desirable pyroelectric properties shown by a static pyroelectric coefficient of at least 0.0039 nCcm<2>k<-><1>. The films comprise compounds of the following formula:- <CHEM> wherein M is ruthenium, iron or cobalt; R<1> is cyclopentadienyl, methylcyclopentadienyl, pentamethylcyclopentadienyl or indenyl; Q<1> is (R<2>)3Z or carbonyl; Q<2> is (R<2>)3Z or carbonyl; Z is phosphorus or arsenic; R<2> is an aryl or alkyl radical; A is <CHEM> Y is a straight chain alkyl or alkoxy radical comprising from 3 to 17 carbon atoms, or, when A is <CHEM> N(R<3>)2; R<3> is a lower alkyl radical comprising up to 5 carbon atoms; and X is PF6 or BF4.</p> |
