Immobilisation of electroactive macrocyclic complexes within titania films

Bernhardt, P. V., Kilah, N. L., Meacham, A., Meredith, P. and Vogel, R. (2005) Immobilisation of electroactive macrocyclic complexes within titania films. Dalton Transactions, 15: 2508-2515. doi:10.1039/b505917h

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Author Bernhardt, P. V.
Kilah, N. L.
Meacham, A.
Meredith, P.
Vogel, R.
Title Immobilisation of electroactive macrocyclic complexes within titania films
Journal name Dalton Transactions   Check publisher's open access policy
ISSN 1477-9226
Publication date 2005
Sub-type Article (original research)
DOI 10.1039/b505917h
Open Access Status File (Publisher version)
Issue 15
Start page 2508
End page 2515
Total pages 8
Editor Dr Jamie Humphrey
Place of publication Cambridge
Publisher Royal Soc Chemistry
Collection year 2005
Language eng
Subject C1
250204 Bioinorganic Chemistry
240000 Physical Sciences
Abstract The 4-carboxyphenyl-appended macrocyclic ligand trans-6,13-dimethyl-6-((4-carboxybenzyl)amino)-1,4,8,11-tetraazacyclotetradecane-6-amine (HL10) has been synthesised and complexed with Co-III. The mononuclear complexes [Co(HL10)(CN)](2+) and [CoL10(OH)](+) have been prepared and the crystal structures of their perchlorate salts are presented, where the ligand is bound in a pentadentate mode in each case while the 4-carboxybenzyl-substituted pendent amine remains free from the metal. The cyano-bridged dinuclear complex [CoL10-mu-NC-Fe(CN)(5)](2-) was also prepared and chemisorbed on titania-coated ITO conducting glass. The adsorbed complex is electrochemically active and cyclic voltammetry of the modified ITO working electrode in both water and MeCN solution was undertaken with simultaneous optical spectroscopy. This experiment demonstrates that reversible electrochemical oxidation of the Fe-II centre is coupled with rapid changes in the optical absorbance of the film.
Keyword Chemistry, Inorganic & Nuclear
Nanostructured Tio2 Films
Metal Charge-transfer
Copper(ii) Complex
Bridged Complexes
Surface Chelation
Q-Index Code C1

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Created: Mon, 13 Aug 2007, 15:22:04 EST