Second harmonic generation in Langmuir-Blodgett films of an asymmetrically substituted metallophthalocyanine
1996; Elsevier BV; Volume: 289; Issue: 1-2 Linguagem: Inglês
10.1016/s0040-6090(96)08940-7
ISSN1879-2731
AutoresYunqi Liu, Yu Xu, Daoben Zhu, Xinsheng Zhao,
Tópico(s)Spectroscopy and Quantum Chemical Studies
ResumoAbstract The formation of Langmuir-Blodgett (LB) films of an asymmetrically substituted metallophthalocyanine, copper nitro-tri-tert-butyl-phthalocyanine, is reported. From the second-harmonic generation (SHG) measurement, macroscopic second-order susceptibility, molecular hyperpolarizability and tilt angle for the molecules on a substrate were determined to be 1.63 × 10−5 esu, 2.11 × 10−27 esu and 26.1°, respectively. The SHG behaviour both in Z-type deposition and in alternating deposition LB films were investigated. A nearly quadratic relation between SH intensity and layer numbers was observed up to seven layers.
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