The Synthesis, Langmuir Film Deposition and Optical Characterization of a 4-Acetalphenyl substitued C60-Pyrrolidine Derivative C60(C12H17NO2)

A new 4-acetalphenyl-substituted C-60-pyrrolidine derivative, C-60(C12H17NO2) (1), has been prepared and its Langmuir films, with and without 22-tricosenoic acid [CH2=CH-(CH2)(20)CO2H(TA)], at the air/water interface have been investigated. Pure 1 forms monolayers more easily than the parent molecule, C-60, and can be transferred onto solid substrates to form Langmuir-Blodgett (LB) films. The mixed Langmuir films of 1 and TA were transferred onto hydrophilically pretreated quartz, glass substrates and silicon wafers. Reflectometric measurement of a 63-layer 1:2 mixed film on a silicon wafer using an He-Ne laser (lambda = 632.8 nm) provided a film thickness and refractive index of 171 nm and 1.73, respectively. Weak second harmonic generation (SHG) from LB monolayers of pure 1 and 1:2 and 1:4 mixed LB monolayer films of 1 and TA was observed. The second-order susceptibilities, chi(pp)((2)), Were evaluated to be in the range (4-6) x 10(-9) esu.