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Colorimetric Detection of Small Molecules by a Frustrated Lewis Pair Containing a Phosphorus‐Functionalized CycloheptatrienylCyclopentadienyl Titanium Sandwich Complex
Author(s) -
Theuergarten Eileen,
Tagne Kuate Alain C.,
Freytag Matthias,
Tamm Matthias
Publication year - 2015
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.201400147
Subject(s) - chemistry , bathochromic shift , frustrated lewis pair , photochemistry , cyclopentadienyl complex , titanium , borane , heterolysis , moiety , boranes , naked eye , inorganic chemistry , lewis acids and bases , organic chemistry , catalysis , boron , physics , chromatography , quantum mechanics , detection limit , fluorescence
The phosphorus‐functionalized cycloheptatrienylcyclopentadienyl (ChtCp) titanium sandwich complex [(η 7 ‐C 7 H 7 )Ti(η 5 ‐C 5 H 4 P t Bu 2 )] ( 7 ) forms a frustrated Lewis pair (FLP) in combination with the borane B(C 6 F 5 ) 3 , and this FLP undergoes heterolytic cleavage of dihydrogen and fixation of carbon dioxide and nitrous oxide with a noticeable colorimetric response, which is visible to the naked eye. In their UV/Vis spectra, the H 2 , CO 2 and N 2 O fixation products exhibit a bathochromic shift of the absorption band that can be assigned to a HOMOLUMO excitation of the ChtCp titanium (troticene) moiety.