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The emission energy of these materials strongly depends on the position of the sulfonyl groups and on the number of fluorine substituents. A 90\u2005nm wide tuning range of photoluminescence from the blue\u2010green (<jats:italic>\u03bb<\/jats:italic><jats:sub>em<\/jats:sub>=468\u2005nm) of iridium(III)bis[2\u2010(4\u2032\u2010benzylsulfonyl)phenylpyridinato\u2010N,C2\u2032][3\u2010(pentafluorophenyl)\u2010pyridin\u20102\u2010yl\u20101,2,4\u2010triazolate] to the orange (<jats:italic>\u03bb<\/jats:italic><jats:sub>em<\/jats:sub>=558\u2005nm) of iridium(III)bis[2\u2010(3\u2032\u2010benzylsulfonyl)phenylpyridinato\u2010N,C2\u2032](2,4\u2010decanedionate) has been achieved. Emission quantum yields ranging from 47 to 71\u2009% have also been found for degassed solutions of the complexes, and a surprisingly high value of 16\u2009% was recorded for iridium(III)bis[2\u2010(5\u2032\u2010benzylsulfonyl\u20103\u2032,6\u2032\u2010difluoro)phenylpyridinato\u2010<jats:italic>N<\/jats:italic>,<jats:italic>C<\/jats:italic>2\u2032](2,4\u2010decanedionate) in air\u2010equilibrated dichloromethane. A unusual stereochemistry of the benzylsulfonyl\u2010substituted dimer and heteroleptic complexes has been detected by <jats:sup>1<\/jats:sup>H\u2005NMR spectroscopy, and is characterised by the mutual <jats:italic>cis<\/jats:italic> disposition of the pyridyl nitrogen atoms of the phenylpyridine ligands, which differs from the most common <jats:italic>trans<\/jats:italic> arrangement reported in the literature.<\/jats:p>","DOI":"10.1002\/chem.200801270","type":"journal-article","created":{"date-parts":[[2008,11,19]],"date-time":"2008-11-19T09:42:57Z","timestamp":1227087777000},"page":"136-148","source":"Crossref","is-referenced-by-count":59,"title":["Iridium(III) Complexes with Sulfonyl and Fluorine Substituents: Synthesis, Stereochemistry and Effect of Functionalisation on their Photophysical 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