PMID- 19159811
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20090227
LR  - 20090122
IS  - 1873-3573 (Electronic)
IS  - 0039-9140 (Linking)
VI  - 77
IP  - 5
DP  - 2009 Mar 15
TI  - Thermo-reversibility of the fluorescence enhancement of acridine orange induced 
      by supramolecular self-assembly.
PG  - 1864-8
LID - 10.1016/j.talanta.2008.10.040 [doi]
AB  - Fluorescence enhancement of acridine orange (AO) in supramolecular hydrogels 
      formed by self-assembly of the gelators 
      3-[(2R)-2-(octadecylamino)-3-phenylpropanoyl]aminobutyrate (TC(18)PheBu) and 
      1,3:2,4-di-O-benzylidene-d-sorbitol (DBS) was investigated by steady-state and 
      varying temperature fluorescence, polarized fluorescence and time-resolved 
      fluorescence techniques. The results showed that the fluorescence intensities of 
      AO in the gels remarkably increased in comparison with AO aqueous solutions, and 
      increased with an increase of the gelator concentrations. The varying temperature 
      fluorescence analysis indicated that fluorescence intensities of AO in the gels 
      decreased upon an increase of temperature, and vice versa. This can be attributed 
      to aggregation and dissociation of the gelators in the systems, since the 
      fluorescence enhancement of AO was induced by self-assembly of the gelators. 
      Polarized fluorescence analysis indicated that the values of anisotropy (r) of AO 
      are significantly higher than that in water. This further confirmed that the 
      three-dimensional network formed by the gelator aggregates constrained the 
      rotation of AO entrapped within the gels, resulting in high values of anisotropy. 
      Time-resolved fluorescence analysis indicated that the rates of fluorescence 
      decay in the gels are lower than that in water. These results reveal 
      thermo-reversibility of the fluorescence enhancement of AO in supramolecular 
      hydrogels.
FAU - Wang, Hong
AU  - Wang H
AD  - School of Chemistry and Chemical Engineering, Huazhong University of Science and 
      Technology, Wuhan 430074, China.
FAU - Zhang, Weiping
AU  - Zhang W
FAU - Dong, Xueling
AU  - Dong X
FAU - Yang, Yajiang
AU  - Yang Y
LA  - eng
PT  - Journal Article
DEP - 20081105
PL  - Netherlands
TA  - Talanta
JT  - Talanta
JID - 2984816R
EDAT- 2009/01/23 09:00
MHDA- 2009/01/23 09:01
CRDT- 2009/01/23 09:00
PHST- 2008/08/12 00:00 [received]
PHST- 2008/10/19 00:00 [revised]
PHST- 2008/10/21 00:00 [accepted]
PHST- 2009/01/23 09:00 [entrez]
PHST- 2009/01/23 09:00 [pubmed]
PHST- 2009/01/23 09:01 [medline]
AID - S0039-9140(08)00772-8 [pii]
AID - 10.1016/j.talanta.2008.10.040 [doi]
PST - ppublish
SO  - Talanta. 2009 Mar 15;77(5):1864-8. doi: 10.1016/j.talanta.2008.10.040. Epub 2008 
      Nov 5.