Premium
An Efficient Ionization Method of Electrospray Mass Spectrometry: The Development of an Aromatic‐Cored Matrix That Wraps Labile Metal Complexes through Molecular Recognition
Author(s) -
Kumazawa Kazuhisa,
Yoshizawa Michito,
Liu HongBo,
Kamikawa Yuko,
Moriyama Masaya,
Kato Takashi,
Fujita Makoto
Publication year - 2005
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200401216
Subject(s) - triphenylene , electrospray ionization , chemistry , adduct , mass spectrometry , ionization , electron acceptor , acceptor , crystallography , analytical chemistry (journal) , molecule , ion , photochemistry , chromatography , organic chemistry , physics , condensed matter physics
Compound 1 a , which possesses a triphenylene core and six tetraethyleneoxide side chains, shows efficient ionization of M II ‐containing (M=Pd, Pt) complexes in electrospray ionization mass spectrometry (ESI‐MS). The molecular ion peaks [ M ] + , which are hardly detected under common ESI‐MS conditions, are clearly observed as their [ M ⋅( 1 a ) n ] + ( n =1–4) adducts. UV‐visible and NMR studies reveal that the electron‐rich triphenylene core of 1 a binds to the electron‐deficient frameworks of the M II complexes in solution, giving rise to charge transfer (CT) complexes. We suggest that 1 a stabilizes the complexes and promotes efficient ionization through unique donor–acceptor molecular recognition.