酞菁染料的金属化和溴化与光物理影响的研究

以α位(2,4-二特戊基)苯氧基邻苯二腈作为环合前体,制备了多种金属酞菁,产物经元素分析、紫外、红外、核磁氢谱等分析手段进行表征.并选择了部分酞菁进行溴化,其中着重研究了不同中心金属以及溴化对染料Q带吸收的影响.结果表明,酞菁染料的金属化对于其Q带吸收影响很大,多数染料金属化后会出现蓝移,而选择合适的条件进行溴化,可以使得金属酞菁的Q带吸收出现一定程度的红移,其中部分溴化金属酞菁的吸收波长与光信息产业中使用的近红外激光器很接近,具有潜在的实用价值.

A Study of Some Novel Metal-chelated and Bromizated Phthalocyanine Dyes in Relation to Their Photo-physical Properties

Several kinds of novel tetra-substituted metal phthalocyanines have been synthesized, based on the precursor of 3-(2,4-ditert-pentylphenoxy)phthalonitrile. The central metals include lead, zinc, copper, nickel, manganese, cobalt and magnesium. These compounds are characterized by elemental analysis, UV-Vis, IR and 1H-NMR. Some of them are selected to be further subjected to bromization. Through experiments, we draw the conclusion that metalation of these phthalocyanines can influence their absorption wavelengths greatly. Most of the metal phthalocyanines are blue-shifted compared to that of free phthalocyanine. The film photo-absorption behavior is also investigated by spin-coating with n-butyl ether and the results show that there is a slight increase of absorption wavelength and the broadening of absorption bands. Under proper conditions, reacting some of these dyes with bromine can produce to a certain extent, bathochromic effect. The absorption wavelength of some of the bromizated compounds is very close to that of laser used in the information technology. An attempt is made to correlate the structures of the metal-centred and bromizated α-(2,4-ditert-pentylphenoxy) phthalocyanines with their photo-physical properties. The nature of the effects of the substitution, central metals and bromization on Q-band absorption of these dyes are presented and discussed.