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Selective and Sensitive Fluorescent Chemosensors for Cu 2+ Ion Based upon Bis‐1,8‐naphthalimide Dyads
Author(s) -
Dai Huiling,
Xu Hui
Publication year - 2012
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201180481
Subject(s) - chemistry , fluorescence , selectivity , ion , metal ions in aqueous solution , photochemistry , quenching (fluorescence) , metal , inorganic chemistry , organic chemistry , catalysis , physics , quantum mechanics
A series of new fluorescent chemosensors 5a – 5e , composed of two aminonaphthalimide fluorophores and 2,6‐bis(( N ‐aminoalkyl)aminocarboxy)pyridines, were prepared, characterized, and their fluorescent properties towards heavy and transition metal (HTM) ions were investigated. Chemosensors 5c – 5e exhibited high selectivity and sensitivity for Cu 2+ ion over other HTM ions with fluorescent quenching (green to colourless). It clearly demonstrated that the length of the linkers (diamines) between the aminonaphthalimides and 2,6‐dicarboxypyridine of 5a – 5e was very important for their sensitivity and selectivity for Cu 2+ ion over other HTM ions.