Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2005-03-01

Journal: CHINESE CHEMICAL LETTERS

Included Journals: ISTIC、SCIE、Scopus

Volume: 16

Issue: 3

Page Number: 341-344

ISSN: 1001-8417

Key Words: indocyanine; p-carboxybenzyl; near-infrared; fluorescence; bioanalysis; solar cell

Abstract: Two fluorescent pentamethine and a squarylium indocyanines containing at least one p-carboxybenzyl group on N atoms in the heterocyclic rings were synthesized. They had good water solubility and photostability. Their maximum absorption and maximum emission were 600-700 nm in water. When it was anchored onto nanostructured TiO2 electrode, compared with in water, the squaraine showed double absorption peaks (one blue shifted and another red shifted) and absorption intensity of the red shift peak increased with the increase of the time of irradiation. The intensity of the blue one decreased simultaneously. We proposed that the presence of two electronic charge forms of squaraine anchored on the TiO2 film might be the reason.