萘酞菁化合物的LB膜及光谱特性研究

Spectral Properties of Asymmetric Substituted Naphthalocyanine Derivatives in Langmuir-blodgett Multilayers

研究了两种不对称取代萘酞菁化合物LB膜的制备,并采用线性吸收谱研究了萘酞菁化合物在溶液和LB膜中的聚集特性。三叔丁基萘酞菁和三叔丁基氰基萘酞菁两种化合物均能制备成很好的LB膜,它们在溶液和LB膜中也均能形成H-聚集体,但在溶液中主要是以单体的形式存在,而在LB膜中则主要是以聚集体的形式存在。两种化合物是倾斜的站立在亚相表面上,但由于氰基的作用,使三叔丁基氰基萘酞菁的倾角较小,几乎是直立在亚相表面上。

Deposition of Langmuir-blodgett films and the aggregative properties of two asymmetric substituted naphthalocyanine derivatives were investigated by using linear absorption spectra and surface pressure-area (pi-A) isotherm lines. The LB films could be formed very welt for both compounds. Both compounds could form H-aggregation in the solutions and LB films. The monomers are the main formation in the solutions for both compounds, and the H-aggregates are the main formation in LB films. The molecules of the compounds are leant on subphase surface. But the declining angle of tri-tert-butyl-cyan naphthalocyanine molecules is smaller than that of tri-tert-butyl naphthalocyanine due to cyano-group interaction.