Abstract
A new acridine derivative bearing two imidazolium groups has been synthesized. This chemosensor displayed a large fluorescent quenching effect with pyrophosphate and a unique fluorescent enhancement with H2PO4-. The strong (C-H)+⋯X- hydrogen bonding between the imidazolium moieties and anions is the key interaction for the recognition. The association constant of 1 with pyrophosphate was calculated as 4.9×107 M-1.
Original language | English |
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Pages (from-to) | 6402-6405 |
Number of pages | 4 |
Journal | Tetrahedron |
Volume | 64 |
Issue number | 27 |
DOIs | |
State | Published - 30 Jun 2008 |
Bibliographical note
Funding Information:This work was supported by the KOSEF grant (NRL) funded by the Korean government (MOST) (R04-2007-000-2007-0), Korea Research Foundation Grants (KRF-R14-2003-014-01001-0, KRF-2004-005-C00093). S.K.K. thanks for the Seoul Science Fellowship. We also thank KBSI in Taejeon, Korea, for their instrumentation assistance (FAB mass spectra).