Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 252, Issue -, Pages 794-802Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.04.161
Keywords
Salen; [Al(salen)(H2O)(2)](+); AIE; Self -assembly; Luminogens
Funding
- National Natural Science Foundation of PR China [21271122, 21571117, 21575083]
- Shanxi Scholarship Council of China [2013-018]
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Salen demonstrates aggregation-induced emission (AIE) effect in aqueous solution and solid state with green fluorescence (salen-N,N'-Ethylenebis(salicylimine)). The reaction of salen with Al3+ results in [Al(salen)(H2O)(2)] directly. [Al(salen)(H2O)(2)](+) exhibits an obvious assembly phenomenon: monomer exists in organic solution with blue fluorescence while self-assembly polymer forms in aqueous solution and crystal state emitting green fluorescence, we rename it as Restriction of Coordinated Water Motions (RCWM) effect. Moreover, the self-assembly of [Al(salen)(H2O)(2)](+) has been observed in different part of cells: green fluorescence in hydrophilic region and blue fluorescence in hydrophobicity region in the same time. The photophysical processes are verified by fluorescence spectra, ESI-MS, X-ray diffractometer. ESIPT effect of salen and fluorescence spectra of [Al(salen)(H2O)(2)](+) have been certified by theoretical calculation. Therefore, salen and [Al(salen)(H2O)(2)](+) can act as an ideal model for the combination of organic AlEgen and metal complex self-assembly both in aqueous solution and crystal state. (C) 2017 Elsevier B.V. All rights reserved.
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