New peripherally-substituted naphthalocyanines: synthesis, characterisation and evaluation in dye-sensitised photoelectrochemical solar cells

X Y Li, N J Long, J N Clifford, C J Campbell, J R Durrant, Colin Campbell

Research output: Contribution to journalArticlepeer-review

Abstract

A series of novel tetra-substituted naphthalocyanines featuring hydroxy and carboxylate substituents in peripheral positions have been synthesised in reasonable yields and characterised by spectroscopic techniques. The photochemical properties of the tetra-acid derivative 7 were examined following immobilisation on a nanocrystalline TiO2 surface and photoinduced dye cations were observed following optical excitation. 7 has a redox potential of 0.25 V (vs. Ag/AgCl), which is lower than is required for an efficient regeneration reaction and, therefore, results in limited photocurrent flow when 7 is used in photoelectrochemical solar cells.

Original languageEnglish
Pages (from-to)1076-1080
Number of pages5
JournalNew journal of chemistry
Volume26
Issue number8
DOIs
Publication statusPublished - 2002

Keywords

  • OPTICAL-PROPERTIES
  • TIO2 FILMS
  • PHTHALOCYANINES
  • DERIVATIVES
  • ALKYL

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