The Studies On The Synthesis And Spectral Properties Of Tin-Centered 5,9,14,18,23,27,32,36-Octabutoxy 2,3-Naphthalocyanine

The phthalocyanine(Pc) compounds have potential use in many areas due to their distinctive physical and chemical properties, but the maximum absorption band (?. max) and solubility of phthalocyanines are important to its application. The extensive study of the relationships between phthalocyanine structures and their physical properties entails the synthesis of phthalocyanines with longer wavelength absorption for the requirement of specific applications.Naphthalocyanines show efficient absorptions in near infrared wavelength for their large delocalized n electron system. In this paper, We prepared a tin-centered 5, 9, 14, 18, 23, 27, 32, 36 -octabutoxy-2, 3 -naphthalocyanine(SnNc(OBu)g) complex and studied its photochemical properties in the existence of SnCl2 or without. The mixture of SnNc(OBu)g and SnCl2 in CHfeClz has a Q-band absorption at .a wavelength of 1044nm in dichloromethane with an extinction coefficient of Lmocrm-1. This property of near infrared absorption opens the window of an array of potential applications in many fields, especially in photodynamic therepy and in infrared light absorbers. In summary, this work includes:1. The advance of synthesis and properties of phthalocyanines were reviewed based on structure characteristics, and the potential applications were also reviewed.2. The tin-centered 5, 9, 14, 18, 23, 27, 32, 36 -octabutoxy-2, 3 -naphthalocyanine was prepared in two ways, and the H NMR, UV-Vis and IR spectra analysis results of it were recorded. As expected, SnNc(OBu)g shows efficient absorption in near infrared region.3. Experiments show that the Q-band position of tin-centered 5, 9, 14, 18, 23, 27, 32, 36-octabutoxy-2, 3-naphthalocyanine (SnNc(OBu)8) exhibits dramatic red-shift upto 1044nm as mixed with SnCk in dichloromethane. The reaction between SnNc(OBu)g and SnCl2 and the red-shift caused by dichloromethane were studied, based on H NMR analysis and quantum chemistry calculation.4. Tin-centered 5,9,14,18,23,27,32,36-octabutoxy-2,3-naphthalocyanine prepared in this paper can be expected to be used in photodynamic therepy and the mixture of it and SnCh can be used as an outstanding infrared light absorber.