Nickel phthalocyanines (NiPc) substituted by trifluorosulfonyl or trimethylsilylethynyl groups have been prepared and characterized using NMR and electronic absorption spectroscopy. In particular, when trifluorosulfonyl groups are introduced to two, so-called, α-benzo positions of one benzene ring of the Pc skeleton, the Q-band splits similarly to the Q-bands of metal-free phthalocyanines. The splitting width of the Q-bands can be interpreted as due mainly to splitting of the LUMOs by the substituents, although splitting between the HOMO-1 and HOMO-2 is also effective to a lesser extent.
|Number of pages||6|
|Journal||Journal of Porphyrins and Phthalocyanines|
|Publication status||Published - 2007 Jan 1|
- Absorption spectra
- Metal phthalocyanine
- Substituent effect
ASJC Scopus subject areas