Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 박준우 | - |
dc.date.accessioned | 2018-05-18T08:14:58Z | - |
dc.date.available | 2018-05-18T08:14:58Z | - |
dc.date.issued | 2005 | - |
dc.identifier.issn | 1010-6030 | - |
dc.identifier.other | OAK-2826 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/243088 | - |
dc.description.abstract | A hemicyanine dye, 4-[4-(dimethylamino)styryl]-1-methylpyridinium iodide (4-ASP) forms inclusion complexes with β-cyclodextrin (β-CD) and modified β-CDs having a sulfonaphthyl (β-CD-NS) or a pyrenyl group (β-CD-py) at the primary face. The complexation constants in water were determined by fluorescence titration and found to be 4.7 × 104 M-1 with β-CD-NS and 3.6 × 104 M-1 with β-CD-py, while it is 730 M-1 with β-CD. Compared to 4-ASP in water, the emission maximum of 4-ASP of the inclusion complexes is blue-shifted by about 20 nm, and emission intensity is higher by 6.4-fold for β-CD, 14-fold for β-CD-NS and as much as 56 fold for β-CD-py complexes. These are much greater than the 3 nm blue shift and 3.3-fold enhancement of emission intensity when the solvent medium is changed to CH3OH. Good overlap between the emission bands of β-CD-appended aromatic groups and absorption band of 4-ASP results in the excitation energy transfer from the excited aromatic groups to 4-ASP and the efficiency of the intra-complex transfer is near 100%. 1H NMR spectra and molecular modeling of the 4-ASP complexes with β-CD-NS and β-CD-py indicated that N-methyl-pyridinium moiety of 4-ASP is outside the primary face of β-CD cavity. The interaction between the N-methyl-pyridinium group and the appended aromatic groups appear to result in the high stability of the complexes. The high fluorescence intensity of 4-ASP in the complexes with β-CD-NS and β-CD-py was explained in terms of hindrance of the formation of the non-fluorescent twisted intramolecular charge transfer (TICT) states by the interaction and confinement in cavity. © 2005 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.title | Efficient inclusion complexation and intra-complex excitation energy transfer between aromatic group-modified β-cyclodextrins and a hemicyanine dye | - |
dc.type | Article | - |
dc.relation.issue | 3 SPEC. ISS. | - |
dc.relation.volume | 173 | - |
dc.relation.index | SCI | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.startpage | 271 | - |
dc.relation.lastpage | 278 | - |
dc.relation.journaltitle | Journal of Photochemistry and Photobiology A: Chemistry | - |
dc.identifier.doi | 10.1016/j.jphotochem.2005.04.006 | - |
dc.identifier.wosid | WOS:000230610900007 | - |
dc.identifier.scopusid | 2-s2.0-21644438520 | - |
dc.author.google | Park J.W. | - |
dc.author.google | Lee S.Y. | - |
dc.author.google | Kim S.M. | - |
dc.contributor.scopusid | 박준우(35332923800) | - |
dc.date.modifydate | 20220119160750 | - |